One of my favorite things to do with users or potential users of WebSphere CloudBurst is to help them understand how they can construct a custom environment using the appliance. Typically, we take one of their existing application environments and discuss the configuration steps that contribute to its makeup. From there, we map the required configuration actions to different customization capabilities in the appliance. It is one thing to talk about how you can customize every layer of your application stack with WebSphere CloudBurst, it is quite another to talk about it in the context of an existing environment. This exercise usually serves to greatly enhance a user's understanding of how to construct tailored environments with the appliance.
While I cannot take every one of you through this exercise in the context of one of your own application environments, I can propose a scenario that will help to illustrate the WebSphere CloudBurst customization process. Consider that I want to deploy a clustered WebSphere Application Server environment whose application server instances utilize WebSphere DataPower XC10 for HTTP session management. In order to deploy such an environment, I would need to do the following:
Install an OS and WAS
Install the WebSphere eXtreme Scale Client binaries - required for integration
Construct a clustered cell
Augment profiles with WebSphere eXtreme Scale profile templates
Configure the application server instances to use WebSphere DataPower XC10 for session management
So those are the steps, but how do they map to WebSphere CloudBurst? First, I know that the WebSphere Application Server Hypervisor Edition image used by WebSphere CloudBurst encapsulates the installation of the OS and WAS. I also know that WebSphere CloudBurst will automatically construct the clustered cell during the deployment process. That means I need to address the installation of client binaries, augmentation of profiles, and configuration of application server instances. In order to do this, I will use a combination of image extension and custom script packages.
To get started, I extend an existing WebSphere Application Server Hypervisor Edition image and simply install the WebSphere eXtreme Scale Client binaries. I then capture that image and store it as my own unique image in the WebSphere CloudBurst catalog. Now, you may wonder why I did not capture the profile augmentation in the custom image. Remember, you cannot change profile configuration during the extend and capture process as WebSphere CloudBurst resets the profiles as part of capturing the custom image.
My custom image encapsulates the installation of the client binaries, so now I turn to custom script packages. I need two in this case. One script package will augment a profile (either deployment manager or custom node) with the WebSphere eXtreme Scale profile template. The second script package will configure application server instances to use WebSphere DataPower XC10 for HTTP session management. Once done with these script packages, I have all the assets I need to build my target environment.
Using my custom image, I build a pattern that contains the number and kind of WebSphere Application Server nodes that I want. I use the advanced options to define a WebSphere Application Server cluster ensuring its creation happens during deployment. Next, I drag and drop the profile augmentation script onto the deployment manager and custom node parts in my pattern. Finally, I drag and drop the WebSphere DataPower XC10 configuration script onto the deployment manager. The pattern is now ready to deploy!
For those of you that are visual learners like me, this demonstration provides a nice overview of exactly what I wrote about above. Check it out and let me know what you think.
For the last post in my FAQs Revisited series, I'm going to cheat a little bit. Instead of addressing one particular question, I'm going with a grab bag of a few different questions. These are questions that I get asked quite frequently, but do not demand an entire blog post explanation. Let's get on with it.
Question: Do the new software license management capabilities provided in WebSphere CloudBurst 2.0 depend on ILMT or other supporting components?
Answer: No. The license management features are completely standalone. Of course, you can still take advantage of ILMT (through easy integration in WebSphere CloudBurst I might add) to track licenses in your cloud if you so choose.
Question: Can I deploy a pattern, make changes to my virtual system, and then recapture that as an updated pattern?
Answer: You cannot do this with WebSphere CloudBurst alone, but you can use WebSphere CloudBurst in conjunction with the Rational Automation Framework for WebSphere to do just this. Check out this article (shameless plug alert!).
Question: What if I have an urgent operating system fix to apply before IBM delivers an update to the OS in the Hypervisor Edition image?
Answer: You can either manually apply the fix to the appropriate virtual machines, or you could package up the fix as a custom WebSphere CloudBurst fix, load it into the catalog, and use the appliance to automate the application of said fix.
Question: Can I change the install location for WebSphere Application Server in the virtual image?
Answer: I've just shown you all this really cool, useful, and easy to use stuff, and you worry about install locations? Seriously though, I understand the genesis of this question usually has to do with existing scripts that assume a certain install location for WebSphere Application Server. I certainly do not advocate changing those scripts, but you cannot change the install location for WebSphere Application Server in the images. There is nothing to keep you from creating a symbolic link however.
Question: Once I deploy a pattern, what do I need to do to add more processing capacity (i.e. more application server processes)?
Answer: You have a couple of options here. You can use normal WebSphere administration techniques to add more application servers to an existing node. If that will not work (perhaps a particular node is operating at max capacity), you can use the new dynamic virtual machine operations in WebSphere CloudBurst to add an entirely new node/virtual machine. If you find yourself consistently making these types of adjustments to the runtime environment based on ebb and flow of demand, you may also want to consider the Intelligent Management Pack option for WebSphere Application Server Hypervisor Edition.
I hope this FAQs Revisited series was helpful. Stay tuned for a look at some recent work I did to integrate WebSphere CloudBurst deployments with the new WebSphere DataPower XC10 appliance.
When it comes to administration of WebSphere environments, I (and many others) am a big fan of scripting. In my view, any administrative action you carry out with frequency > 1 is ideally suited for a script. The downside to not using scripts (longer configuration times, inconsistent configurations, isolated expertise) is simply too steep in most cases. I also realize that simply saying that you should script is not enough. For some, the learning curve can be a bit daunting. Quite frequently, I talk about our samples gallery or provide posts with embedded scripts in the hopes that I can help flatten out this curve a bit.
While these samples can certainly help to speed up your scripting efforts for certain use cases, they are more or less helpful for solving tactical challenges when scripting. If you and your company are embarking down a strategic path that includes beefing up your administrative scripting capability, I would strongly suggest you look at a resource a few of my colleagues pointed me at recently.
The resource I am talking about is the wsadminlib.py package referenced here. This python script file is a collection of hundreds of methods that carry out common WebSphere Application Server administrative tasks. The authors carefully constructed these methods with clear method and parameter names. The result is a script resource that can become the foundation for your custom-crafted administrative scripts.
I recently downloaded the wsadminlib.py script and began constructing WebSphere CloudBurst script packages to utilize it. To say I am impressed would be an understatement. This file makes so many tasks so incredibly simple. Take for instance the creation of an SIBus. That's just a simple call like the following:
wsadminlib.createSIBus(clusterName, nodeName, serverName, SIBusName, scope, secure)
How about associating a shared library with an application or application module? Another one-line call:
wsadminlib.associateSharedLibrary (libName, appName, warName)
Or what about setting a custom property in the webcontainer? You guessed it. One-line:
wsadminlib.setWebContainerCustomProperty(nodeName, serverName, propName, propValue
This is just an extremely small sample of what the wsadminlib.py includes. As I mentioned earlier, there are hundreds of other methods that carry out various tasks including: installing applications, creating core groups, creating virtual hosts, installing BLAs, creating JMS queues, and much more. If you are looking to beef up your WebSphere Application Server scripting efforts, or if you are just starting, I strongly encourage you to look into and make use of this valuable resource!
Can you have cloud computing without virtualization? I don't think so. Some have stated to me that they believe a cloud could b contrived without virtualization but I don't see it. Cloud computing is all about being able to expand or contract an enterprise on demand and as a service. Without deployable virtual images there is no mechanism for doing this efficiently.
I suppose that you could argue that clouds do not necessarily include the OS or the hardware and that you could scale by use of templates and configuration files to clone systems. That is cloning. Cloning, spawning, parallel processing and other mechanisms for creating capacity and processing power dont have the scope that a full cloud implementation has. Cloud computing is an administration paradigm that may share or even employ some or all of these other techniques but can include more.
I guess the biggest thing that sets cloud computing apart from cloining or spawning is that cloud computing is a paradigm for a flexible distributed computing platform. Cloning and spawing are techniques as is Virtualization.Clouds are entire managed infrastructures where virtulized systems are simply tools and cloning is a function of products.
At the core of cloud computing discussions and cloud computing in general is the idea of virtualization. The word 'virtualization' might invoke different things depending on who you talk to but for cloud discussions many people think of virtual images: entire systems being stored even down to the operating systems. The advantages seem evident. Instead of complex deployment models you simply need to take an unused piece of hardware resource and lay in the exact pattern. The assumption is that the hardware is free an compatible but everything else is negotiable. I think, however that there are different levels of assumption within the cloud concept. Laying in entire systems from the OS up may be way more work than is necessary. The advantage is that there are fewer constraints on what kinds of things you can depoy in your cloud. But one of the big disadvantages are that there are fewer constraints on what kinds of things you can depoy in your cloud. Sometimes, productivity is higher when your developers are given the topology parameters and when he knows what resources are going to be available. In fact, the concept of cloud seems to infer that there are fewer assumptions needed so you will have maximum versatility. However, flexibility is an antagonist to stability and stability is needed for prodcutivity. In effect, more assumptions necessarily equals faster developement and quicker time to release. So is cloud the antithesis of productivity? No, of course not. The beauty of clouds is that you can have as many assumptions as you want. A productive cloud model could assume specific hardware, OS and even webservers and macro-topologies. The cloud's resources could simply be avalable platforms that serve as quickly added nodes that can be dynamically provisioned within an appserver deployment. I think cloud models can be stratfied based on the number of assumptions that are built into it. Level 0 clouds could be where the only assumtion is the that the physical machines will support the virtual images. Level 6 could be that virtual servers and resources can be cloned by template to act as expansion nodes to meet growing demand. Does this cross over into other scaling models? Yes. So what? It doesn't have to be unique in every aspect it merely has to be consistent for effective use.
As I have mentioned before, IBM Workload Deployer v3.0 introduces choices in pattern-based deployment models. One of those models, virtual system patterns, is a carry over from the WebSphere CloudBurst Appliance. When you use virtual system patterns in IBM Workload Deployer, you can take advantage of all of the techniques you put to use in WebSphere CloudBurst. This is certainly good news for current WebSphere CloudBurst users, but it goes a bit further. Instead of simply maintaining the status quo with virtual system patterns, which would have been reasonable considering the introduction of virtual application patterns, we chose to continue to expand on your customization options for this pattern deployment model. In particular, I want to discuss three new features in IBM Workload Deployer that may help you to better construct and manage virtual system patterns.
The first new feature is one that I have been eagerly awaiting. In the new version of the appliance, we provide you with the ability to specify part and script package ordering in your pattern. This means that, within the virtual system pattern editor, you can tell IBM Workload Deployer in which order to start the virtual machines in your pattern, and you can specify in which order to invoke the script packages within the pattern during deployment. This eliminates the need for special script invocation orchestration logic in your pattern (I had customers resorting to a semaphore like approach using a shared file system), and it allows you to be more declarative about the virtual machine bring-up process. There are constraints, specifically with the part ordering. Some images will impose an implied part start-up order that you cannot change. For instance, deployment manager parts in the WebSphere Application Server Hypervisor Edition image must start before custom node parts. The good news is the pattern editor will not allow you to specify a part start-up order that violates these constraints. The image below shows an example of the ordering view in the virtual system pattern editor.
Another new feature that may influence the way you build virtual system patterns is the introduction of Add-Ons. You can think of Add-Ons as special script packages that you can include in your virtual system pattern that perform system-level configuration actions. Specifically, you can include add-ons in your virtual system pattern to add an operating system user, add a virtual disk, or add a NIC during the deployment process. You include Add-Ons in your pattern by simply dragging and dropping them onto a part in your pattern, just as you do with script packages today. The difference between script packages and Add-Ons is that IBM Workload Deployer will ensure the invocation of all Add-Ons before any other scripts run during deployment. We include default Add-On implementations for adding a user, disk, and NIC.
The last new feature I want to talk about today has more to do with how you manage or govern the deployment of virtual system patterns. In WebSphere CloudBurst 2.0, we introduced the idea of Environment Profiles as a way to extend your customization reach into the deployment process. Initially, these profiles gave you the ability to directly assign IP addresses to virtual machines in your deployment, declaratively specify virtual machine naming formats, and easily split a single pattern deployment across multiple cloud groups. In IBM Workload Deployer, you will be able to use these same profiles to set resource consumption limits for pattern deployments. In particular, you will be able to set cumulative limits for virtual CPU, memory, storage, and software licenses used by deployments tied to a specific profile, thereby giving you finer-grained control over cloud resource consumption. The picture below shows the new resource limit aspects of environment profiles.
Virtual system patterns are key in the deployment model choices for IBM Workload Deployer. Not only did we carry the concept over from WebSphere CloudBurst to IBM Workload Deployer, but we made it even better. Expect this trend to continue!
I was at a customer meeting the other day, and someone asked me if they could query WebSphere CloudBurst for an inventory of all of their virtual system deployments. This person was of course aware that he could go to the web console and very quickly view all of the virtual systems. What he wanted though was something that he could run to generate a report that contained all of this information. For a purpose like this, harnessing the WebSphere CloudBurst CLI is exactly the way to go.
I thought I'd write a simple CLI script that provides an example of how you could do this.
from datetime import datetime
outFile.write("WebSphere CloudBurst Virtual System Inventory\n")
outFile.write("Total virtual systems: " + str(len(cloudburst.virtualsystems)))
def writeVSDetails(outFile, virtualSystem):
outFile.write("\tVirtual system name: " + virtualSystem.name)
outFile.write("\tCreated from pattern: " + virtualSystem.pattern.name)
outFile.write("\tVirtual system status: " + virtualSystem.currentstatus_text)
created = datetime.fromtimestamp(virtualSystem.created)
outFile.write("\tVirtual system creation date: " + created.strftime("%B %d, %Y %H:%M:%S"))
outFile.write("\tTotal virtual machines: " + str(len(virtualSystem.virtualmachines)))
def writeVMDetails(outFile, virtualMachine):
outFile.write("\t\tVirtual machine name: " + virtualMachine.name)
outFile.write("\t\tVirtual machine display name: " + virtualMachine.displayname)
outFile.write("\t\tCreated from image: " + virtualMachine.virtualimage.name)
outFile.write("\t\tVirtual machine hypervisor: " + virtualMachine.hypervisor.name + " | " + virtualMachine.hypervisor.address)
outFile.write("\t\tVirtual machine IP address: " + virtualMachine.ip.ipaddress)
outFileLoc = sys.argv
outFile = open(outFileLoc, 'w')
for virtualSystem in cloudburst.virtualsystems:
for virtualMachine in virtualSystem.virtualmachines:
As a result of invoking this script using the CLI's batch mode, content is written to the file location supplied by the caller.
WebSphere CloudBurst Virtual System Inventory
Total virtual systems: 3
Virtual system name: Single server
Created from pattern: WebSphere single server
Virtual system status: Started
Virtual system creation date: January 15, 2010 16:37:20
Total virtual machines: 1
Virtual machine name: Standalone 0
Virtual machine display name: Single server cbvm-110 default
Created from image: WebSphere Application Server 22.214.171.124
Virtual machine hypervisor: Ruth ESX | https://<hypervisor_host>/sdk
Virtual machine IP address: <ip_address>
Virtual system name: Development WAS Cluster
Created from pattern: Custom WAS Cluster - Development
Virtual system status: Started
Virtual system creation date: January 18, 2010 14:08:46
Total virtual machines: 2
Virtual machine name: DMGR 0
Virtual machine display name: Development WAS Cluster cbvm-112 dmgr
Created from image: WebSphere Application Server 126.96.36.199
Virtual machine hypervisor: Ruth ESX | https://<hypervisor_host>/sdk
Virtual machine IP address: <ip_address>
Virtual machine name: Custom Node 1
Virtual machine display name: Development WAS Cluster cbvm-111 custom
Created from image: WebSphere Application Server 188.8.131.52
Virtual machine hypervisor: Ruth ESX | https://<hypervisor_host>/sdk
Virtual machine IP address: <ip_address>
Virtual system name: DB2 for development use
Created from pattern: DB2
Virtual system status: Started
Virtual system creation date: January 18, 2010 14:09:58
Total virtual machines: 1
Virtual machine name: DB2 Enterprise Server 32bit Trial 0
Virtual machine display name: DB2 for development use cbvm-113
Created from image: DB2 Enterprise 184.108.40.206 32-bit Trial
Virtual machine hypervisor: Ruth ESX | https://<hypervisor_host>/sdk
Virtual machine IP address: <ip_address>
I withheld IP addresses and host names above for obvious reasons, but if you ran the script against your environment you would see actual host name and IP address values. The script above is written once, and it can be subsequently run anytime you want an inventory of virtual systems running in your WebSphere CloudBurst cloud. There's other information available for virtual systems and virtual machines that I didn't show here, and you can retrieve it if necessary for your inventory report. In addition, I chose to print this information as regular text in a file supplied by the caller, but you might choose to generate the report in another format including XML, JSON, or anything else for that matter.
-- Dustin Amrhein
p.s. As with any sample code or script I provide here, the above is only a sample and offered as-is.
I’m going to take a different approach this week in the blog. Instead of me telling you about some of the features or uses of WebSphere CloudBurst, I thought I would catch up with someone using the product everyday, WebSphere Test Architect Robbie Minshall. Robbie is responsible for a team of testers that harness a lab of over 2,000 physical machines to put our WebSphere Application Server product through some pretty rigorous testing. Toward the beginning of this year Robbie’s team started to leverage the WebSphere CloudBurst Appliance in order to create the WebSphere Application Server environments needed for their testing.
Robbie, can you tell us a little bit about what the WebSphere Application Server test efforts entail?
In WebSphere Application Server development and test we have two primary scenarios. The first is making sure that developers have rapid access to code, test cases and server topologies so that they can write code, test cases and then execute test scenarios on meaningful topologies. The second scenario is an automated daily regression where in response to a build, we provision a massive amount of WebSphere Application Server topologies and execute our automated regression tests.
Previously we have supported these scenarios through the deployment of the Tivoli Provisioning Manager for operating system provisioning, some applications for checking out environments, and then a lot of automation scripts for the silent install and configuration of WebSphere Application Server cells.
Given those scenarios and the existing solution, what are your motivations for setting up a private cloud using WebSphere CloudBurst Appliance?
We are supporting these scenarios through a pretty complicated combination of technologies. These include silent WAS install scripts, wsadmin configuration scripts, a custom hardware leasing application and the utilization of Tivoli Provisioning Manager for OS Provisioning. This solution is working very well for us though as always we are looking for areas to improve, opportunities to simplify and to reduce our dependency on investment in our custom automation scripts. Mainly, there were 3 areas where we wanted to improve our framework: Availability, Utilization and Management. This is why we started looking to the WebSphere CloudBurst Appliance.
Can you expand a bit on what you are looking for in those three areas?
The first focus area we have is availability of environments. We really wanted to lower the entry requirement for the skills and education necessary to get a development or test environment. Setting up these environments has just been too hard, too time consuming, and too error prone. Using WebSphere CloudBurst we can provide an easy push button solution for developers to get on-demand access to the topologies they need.
The second area we are looking for significant improvements on is hardware utilization. Our budgets are tight and in our native automation pools we are only using between 6-12% of the available physical resources. In order to improve this we were looking at leveraging virtualization. WebSphere CloudBurst offers the classic benefit of virtualization with the nice additions of optimized WebSphere Application Server placement and really good topology and pattern management. In our initial experiments we were able to push the hardware utilization up to 90% of physical capacity and consistently were leveraging around 70% of our physical capacity.
Finally we are looking to improve and simplify our management of physical resources and automation. We work in a lot of small agile teams and organizational priorities change from iteration to iteration. Not only does WebSphere CloudBurst allow us to maintain a catalog of topologies or patterns for releases but it also allows us to adjust physical resource allocation to teams through the use of sub clouds or cloud groups.
Basically we felt that WebSphere CloudBurst would improve the availability of application environments, enhance automation, and improve hardware utilization all with very low physical and administrative costs.
What were some of the challenges involved with getting a cloud up and running in your test department?
One of our challenges seems like it would be common to many scenarios, especially in today’s world. Our budget for new hardware to build out our cloud infrastructure was initially very limited. Most cloud infrastructure designs depict very ideal hardware scenarios including SANs, large multicore machines, and private and public networks within a dedicated lab. Quite frankly we did not have the budget to create this from scratch. It was important for us to demonstrate value and data to warrant future investment in dedicated infrastructure. After some performance comparisons we were very happily surprised to see that we could leverage our existing mixed hardware within a distributed cloud. The performance of application environments dispensed by WebSphere CloudBurst on many small existing boxes in comparison to large multicore machines with a SAN was very comparable. This allows us to leverage existing hardware, with minimal investment all the while demonstrating the value and efficiencies of cloud computing. That data in turn has allowed us to obtain new dedicated hardware to iteratively build up a larger lab specifically for use with WebSphere CloudBurst.
Specifically with WebSphere CloudBurst, are there any tips/hints you would offer users getting started with the appliance?
Sure. First, we quickly realized as we added hypervisors to our WebSphere CloudBurst setup it was critical to have someone with network knowledge on hand. This is because the hypervisors came from various sections of our lab, and we really needed people with knowledge of how the network operated in those different sections. Once we had the right people we were able to setup WebSphere CloudBurst and deploy patterns within an hour and a half.
Moving forward we continued to have challenges as we dynamically moved systems between our native hardware pool and our cloud. Occasionally the WebSphere CloudBurst administrator would move a system into the cloud but incorrectly configure the network or storage information. This lead to some misconfigured hypervisors polluting our cloud. We overcame this, quite simply and satisfactorily I may add, by creating some simple WebSphere CloudBurst CLI scripts which add the hypervisors, test them individually, by carrying out a small deployment to that hypervisor, and then move the correctly configured hypervisors into the cloud after verifying success. Misconfigured hypervisors go into a pool for problem determination. This has allowed us to maintain a clean cloud, and we are able to dynamically move our hardware in and out of the cloud to meet our business objectives.
We also use the WebSphere CloudBurst CLI to prime the cloud so to speak. Before using a given hypervisor in our cloud, we execute scripts that ensure each unique virtual image in our catalog has been deployed to each of our hypervisors at least once. When the image is first deployed to a hypervisor, a cache is created on the hypervisor side of the connection, thus meaning subsequent deployments do not require the entire image to be transferred over the wire. This gives us consistent and fast deployment times once we are using a hypervisor in our cloud.
I would assume that like many applications deployed on WebSphere Application Server, your team’s applications have several external dependencies. Some of these dependencies won’t necessarily be in the cloud, so how did you handle this?
You’re right about the external dependencies. Our applications and test cases run on the WebSphere Application Server but are dependent upon many external resources such as databases, LDAP servers, external web services etc. WebSphere CloudBurst allows us to deploy WAS topologies in a very dynamic and configurable way but the 1.0.1 version does not allow us to deploy these external resources in the same manner. This was overcome by using script packages in our patterns. These script packages allow us to associate our test applications with various patterns we have defined. The script package definition also allows us to pass in parameters to the execution of our scripts. We supply these parameter values during deploy time, and these values are used to convey the name or location of various external resources. The scripts that install our applications can access these values and ensure the application is properly integrated with the set of resources not managed by the appliance.
What is your team looking to do next with WebSphere CloudBurst and their private cloud?
The next challenge on our plate is to keep up with the demand of our expanding cloud and to develop a more dynamic relationship between our native pools and our cloud using the Tivoli Provisioning Manager. These are fun challenges to have and we look forward to sharing our progress.
I'm glad I got to spend some time with Robbie to glean some insight into their work and progress with WebSphere CloudBurst. I hope this information was useful to you. It's always nice to hear about a product from practitioners who can give you hints, tips, gotchas, and other useful information. Be sure to let me know if you have any questions about what Robbie and his team are doing with WebSphere CloudBurst.
If you are reading this blog then I am pretty sure that you are interested in the agility that can be achieved by rapidly provisioning middleware systems and standing up virtual applications in a private cloud environment. However there are other aspects of agility that you should also consider. One such aspect is the ability to build applications that can be easily maintained, updated, and extended. This is where OSGi technology comes into the picture.
If you have been working with the IBM Workload Deployer (or watching some IBM Workload Deployer demos) you may have noticed a category of components in the virtual application builder called OSGi Components.
Maybe you already know all about OSGi applications and the value they bring to an enterprise. Or, perhaps you noticed this and decided that you would search for some more information on this odd acronym and just what an OSGi application is all about.
In a nutshell OSGi technology is a way to define dynamic modules for Java. It provides a standard way to encapsulate components (called bundles) with metadata that define versioned package dependencies, service dependencies, packages exported, services exported, etc... basically everything you need to know about this bundle so that it can be connected up with other bundles to support a particular solution. These bundles can then be grouped together into applications and dynamically wired to fulfill necessary dependencies at runtime. The OSGi framework provides all of the necessary capability to manage the dependencies and resolve any problems.
Those who leverage OSGi technology benefit from improved time-to-market and reduced development costs. The loose coupling provided by the OSGi framework reduces maintenance costs and facilitates the dynamic delivery of components in a running system. Of course there's a lot more to it than just that ... involving portability across different environments, achieving the appropriate level of isolation or sharing within an environment, and integrating with the many different technologies and patterns already available today. I don't think I know enough about OSGi to do it justice here. But fortunately for me (and you) there are several experts who can make it all clear.
One such expert is Graham Charters and there is a great opportunity to hear him introduce this topic and also participate in a dialogue about the concepts and what they mean for your business. Graham will be leading a Global WebSphere Community Lab Chat on Wednesday of this week (July 20th) entitled: How can OSGi make your enterprise more agile. Graham is the IBM technical lead in the OSGi Alliance Enterprise Expert Group and an active participant in the open source community implementing many of these standards. So register now for this free session and learn how OSGi can make your enterprise even more agile.
Customers are always impressed when they learn about the simplicity, resiliency, and rapid time to value they can received from virtual applications. However, they are usually a little mystified at how virtual applications really work. After all - they have become quite accustomed to doing things the "traditional way" where they control every aspect of their applications manually. Virtual Applications represent an entirely new way of thinking. Sure, the benefits are enormous but can you really trust them? How is it doing all of this anyway?
What seems like "magic" is really a sophisticated and coordinated set of activities driven and coordinated by IBM Workload Deployer while leveraging the expertise built into the pattern type. Yes, you can trust it because experts have worked to build the system and created to it react and respond much faster than you can. When moving away from manual processes to automated processes it is always nice to get a sense of what is really happening. I think it is just human nature. We can't really place our trust in something until we have first hand experience or understand what it is really doing ... I guess it is the critic inside each one of us. Even after you've experienced the value it is still reassuring to see and understand the "how".
It is the "how does it do that?" type of question that I attempted to answer for virtual applications in a blog post I wrote on the Expert Integrated Systems blog recently. It attempts to pull the curtain aside and describe what is actually happening to support a virtual application pattern. As with my previous post - this was written for IBM PureApplication Systems but the concepts are 100% applicable to IBM Workload Deployer. I think you will find it interesting ... Continue reading ...
If you've read anything I've written about WebSphere CloudBurst up to this point you know all about patterns. Using the appliance you can easily and quickly build, deploy, and manage these representations of your middleware application environments. Today, I want to focus in on the deployment piece in particular and take a look at how you can easily automate this process.
You can use the WebSphere CloudBurst web console to deploy patterns, and when doing so you can even schedule the deployment to happen at a later date. This scheduling capability certainly gets you on the road to an automated deployment process, but what if you want to take it one step further and eliminate the need for someone to login and manually move around the web console to schedule automated deployments? In this case, you can use either the CLI or the REST interface that WebSphere CloudBurst offers.
In this post I thought I'd take a look at using the CLI interface in order to set the stage for some nice automation around pattern deployment. It starts out with a properties file that provides details about my deployment. This includes the cloud to deploy to, the pattern to deploy, password information, and the time at which the virtual system should start.
SYSTEM_NAME_PREFIX=New App Development
TARGET_CLOUD=Default ESX group
TARGET_PATTERN=WebSphere single server
Imagine that the properties file above gets written as the result of some other action, such as the completion of your application's build process. With the properties file in place, and I'll point out that your properties file can and probably will be more robust than above, let's move on to the code that handles the deployment process based on the information in said file. First, we have a small amount of CLI code to retrieve and parse the input data (I omitted the straight-forward properties retrieval for space):
from datetime import datetime, timedelta
from java.util import Properties
from java.io import FileInputStream
// read in and retrieve properties using java.util.Properties API (i.e. props.getProperty('DEPLOYMENT_DATE'))
parsedParts = deploymentDate.split(" ")
systemName = systemName + "_" + deploymentDate
dateParts = parsedParts.split("/")
timeParts = parsedParts.split(":")
monthPart = int(dateParts)
dayPart = int(dateParts)
yearPart = int(dateParts)
hourPart = int(timeParts)
minutePart = int(timeParts)
Next is the code that actually schedules the pattern deployment:
First we get the desired deployment time and current time as datetime objects. After that, assuming the desired deployment time has not already elapsed, we calculate the difference between the desired deployment time and current time. This difference, in seconds, is then added to the result of the time.time() value to come up with a start time. After that is done, we simply retrieve the cloud that was indicated in the properties file, and then we call the runInCloud method for the pattern indicated. When calling the runInCloud method we supply the name of the virtual system that will be created, password information, and the start time we calculated earlier. As a result of this method call, a task will be generated in the target WebSphere CloudBurst Appliance and the virtual system will be started at the specified time. This will happen in an automated fashion with no human intervention required.
That's really all there is to automating the pattern deployment process using the CLI. In a more complete, end-to-end scenario you may envision the completion of one process, such as an application build process mentioned above, result in the writing of the properties file and in turn the call into the CLI to deploy a pattern. As always, feel free to send me any comments or questions.
In WebSphere CloudBurst, a script package is your vehicle to provide custom middleware configuration. This may mean installing applications, configuring application dependencies, or otherwise tuning the middleware layer. Script packages are essentially ZIP files that include some executable (shell script, wsadmin script, Java program, etc.), and optionally, artifacts that support the execution of the script. As was the intention, you can achieve just about anything you want with a script package. This allows you to be as flexible and creative as you need to be, but it can also leave you asking "Where do I start?" In this post, I want to take an in-depth look at constructing and using a script package in WebSphere CloudBurst.
Specifically, I want to create a script package that supplies configuration functionality for something I believe a fair number of you do: change the default ports used in WebSphere Application Server. To create this and deploy a pattern using the script package, I do the following:
Create a shell script that configures the desired ports
Add the new script as a WebSphere CloudBurst script package
Create a pattern with the new script package
Deploy the pattern and verify the result
First things first. I create the following shell script that configures the ports:
The script uses documented ANT commands included with the WebSphere Application Server to update the ports based on a starting port number. You will notice the script first sources the /etc/virtualimage.properties file. This file is automatically created by WebSphere CloudBurst on every virtual machine it starts. The file is a key/value file with basic information about the WebSphere cell such as the install root ($WAS_INSTALL_ROOT), the profile name ($PROFILE_NAME), host name ($HOSTNAME), and more. For a full list of the data that WebSphere CloudBurst includes in this file, check out this documentation.
In addition to utilizing the standard set of variables provided by WebSphere CloudBurst, my script above also makes use of the $STARTING_PORT variable. Obviously this variable is not in the standard set. In fact, I define the STARTING_POINT variable when I define my new script package in WebSphere CloudBurst.
First I zip up the shell script above and attach it to the new script package. Next, I tell WebSphere CloudBurst where to unzip the script package on the virtual machine, how to invoke the included script, and the name of any parameters to associate with the script. Once that is done I can use the script package in a new pattern.
For the sake of simplicity here, I create a new pattern by cloning an existing WebSphere Application Server single server pattern. I drag and drop the new Configure ports script package on the single part and end up with the pattern shown below.
Now I am ready to deploy the pattern by clicking the Deploy button. During the deployment process I configure each part in the pattern (in this there is only a single part). I supply configuration information like virtual memory allocation, WebSphere cell name, WebSphere node name, and password information. In addition, I also supply a value for the STARTING_PORT parameter that is part of the Configure ports script package included in the pattern. The value I supply here will get inserted into the /etc/virtualimage.properties file on the virtual machine, and the value's key will be STARTING_PORT.
Once the configuration information is supplied, I click OK on the configuration panel and deployment panel, and WebSphere CloudBurst goes about standing up my virtualized WebSphere cell and running my script to configure the ports for the server instance. When it is done, I login to the WebSphere Application Server administration console to verify my results. To do this, I navigate to the configuration for the single application server instance, and pull up its port definitions.
Based on the results I can see my customizations took effect. I successfully captured my own unique WebSphere environment (in this case with a custom port range) in the form of a pattern. This custom environment can be deployed as many times as I need, in an automated fashion, and I'm guaranteed consistent results each and every time.
I hope this gives you a better idea of what script packages are all about and how they can utilize both WebSphere CloudBurst and user-supplied data that exists in the /etc/virtualimage.properties file of each virtual machine. If you have any questions let me know. I'm on Twitter @damrhein, or you can leave a comment right here.
May is almost here and that means that IBM IMPACT is right around the corner. Just like years past, IMPACT 2010 will be a great chance to get valuable education and insight into IBM WebSphere software and software from across the IBM software family. If you want to hear how IBM software is leading the march toward a smarter planet, register now.
IMPACT 2010 will be a great chance to hear the WebSphere cloud computing story. There will be multiple sessions on the WebSphere CloudBurst Appliance. These include customer-led sessions, internal adoption stories, overviews, and much more. I'll be there running a hands-on lab and delivering a session that discusses integration between WebSphere CloudBurst and IBM Rational tools. Of course, there is more to WebSphere and cloud computing than WebSphere CloudBurst. We have several other sessions that will detail all of IBM WebSphere's work in the cloud.
If you are interested, I put together a short video discussing some of the sessions on tap for WebSphere and cloud computing at IMPACT 2010. I'd also encourage you to check out the social media site for IBM IMPACT 2010. On that site, you will find tweets, videos, and blogs about the conference. Don't forget to sign up, and I hope to see you in Las Vegas!
-- Dustin Amrhein
I was very encouraged by the consistently positive response we got at IMPACT for our WebSphere CloudBurst and Rational Automation Framework for WebSphere (RAFW) integration. I believe there were many reasons for this response: accelerated time to value, decreased investment needs for activities that are not core to your business, lowered barrier of entry for provisioning and configuring WebSphere cells, and much more. While those are certainly all very real and valuable benefits, I also believe that quite a bit of interest in this integrated solution comes from the fact that it is applicable to a number of needs common to you, our WebSphere users.
With that in mind, let's look at some (not all) of the scenarios where WebSphere CloudBurst and RAFW integration can help you:
Create WebSphere CloudBurst patterns that include configuration without scripting: Users love our WebSphere CloudBurst patterns. They really see the value in codifying both the topology and configuration of their application infrastructure. However, some users do not have existing WebSphere configuration scripts and do not have the time and/or resource to invest in creating these scripts. They are looking for a solution that provides not only the provisioning of WebSphere environments but also the configuration of said environments (configuration beyond what our IBM Hypervisor Edition images encapsulate, specifically application-oriented configuration). RAFW provides this capability in the form of 500+ out-of-the-box configuration actions for WebSphere environments. This includes actions to create JDBC resources, create JMS queues, deploy applications, configure application containers, and much, much more. You can create WebSphere CloudBurst patterns that contain a special script package, which points back to a RAFW project containing a set of configuration actions. During deployment, WebSphere CloudBurst will provision your WebSphere environment and then cause the invocation of the specified RAFW project, which in turn runs a set of configuration actions against the provisioned environment. This means you can set up full-blown, ready-to-go application environments with absolutely no user-supplied scripting. In fact, I took this approach to setup a J2EE performance benchmark application, DayTrader 2.0, running on WebSphere Application Server. Those of you familiar with the application know this is not a trivial environment to stand up. Yet, I did it without having to personally write a single line of configuration scripting, and it was all ready to go in around thirty minutes.
Creating WebSphere CloudBurst patterns from existing environments: This comes up all the time. I go through a standard introduction to WebSphere CloudBurst, users see the value, love the patterns-based approach, and immediately want to know how they get their existing environments into the form of a pattern. RAFW, along with the special WebSphere CloudBurst script package, can make this a straightforward and hardened process. You use a capability in RAFW to import the configuration of an existing cell, thereby creating a RAFW environment for that configuration. You then create a WebSphere CloudBurst pattern with a topology congruent to your existing environment, attach the special script package I mentioned earlier, and you are done with the import! When you deploy this pattern, you simply specify the RAFW environment that you created earlier (the one that holds the configuration data for your existing environment) and a RAFW project that will apply the configuration data in that RAFW environment to the WebSphere environment provisioned by WebSphere CloudBurst. The creation of the WebSphere environment, as well as its configuration, happens in a completely automated fashion.
Configure, capture, reuse: There are many situations that may require you to make manual changes to a WebSphere cell after it has been deployed. For example, during performance testing for your application, you might discover that you need to tweak the number of available threads in the web container. As another example, for the first setup of a given application environment, you may want to quickly deploy the cell using WebSphere CloudBurst and then manually install and configure your applications to make sure everything is just right. In either case, it is likely that you want to capture the updated configuration and make sure that any future deployments use those updates. Again, WebSphere CloudBurst and RAFW makes this simple. First, you build a pattern that encapsulates your WebSphere topology (the types and quantity of nodes you want) and attach the special script package mentioned above. For the first deployment, you simply specify the name of the new RAFW environment you want to create. Once the system is up, you log into the WebSphere administration console, make your necessary customizations, and then you use RAFW to import that updated configuration thus updating the initially created RAFW environment. For subsequent deployments, you simply deploy the same pattern, specifying the same RAFW environment as well as a RAFW project, which RAFW automatically created for you during the first deployment. This project applies the configuration (the one you manually established and imported into RAFW) to the WebSphere environment setup by WebSphere CloudBurst.
Configure WebSphere environments across virtual and physical settings: It seems that in many cases our users manage the same WebSphere environment across both virtual and physical settings. For example, they may provision the application environment using WebSphere CloudBurst for everything from development to pre-production, and then for production provision that same environment to a set of physical servers. At least, they try to provision the same environment. In reality, it is tough to reproduce the exact same configuration once you break from the WebSphere CloudBurst patterns-based approach. However, if you stored the configuration of your WebSphere cell as a RAFW environment, you could apply that configuration data to a WebSphere cell regardless of whether it existed in the physical or virtual world. Once you move to physical, you do lose out on the fast provisioning, WebSphere intelligence, cloud management capabilities, and automated integration with RAFW that you get when using WebSphere CloudBurst, but if it is in your process to move to physical hardware at some point, reusing the same RAFW environment certainly eases the migration task.
I hope this sheds some light on some of the common issues WebSphere CloudBurst and the Rational Automation Framework for WebSphere can combine to solve really well. This is by no means an exhaustive list, but really meant to point out the broad application of the solution. If you want to see how it works, check out this video.
Script packages are an integral part of virtual system patterns in IBM Workload Deployer. By attaching script packages to your patterns, you provide customizations particular to your unique cloud-based middleware environments. Customizations provided by script packages might include installing applications, creating application resources, integrating with external enterprise systems, and much more. The bottom line is, if you are creating virtual system patterns, you will almost certainly be creating script packages.
Largely, the act of creating a script package is independent of IBM Workload Deployer. The appliance does not dictate a particular scripting language, so all you need to do is make sure you can invoke your logic in the operating system environment. Your script package may be a wsadmin script, shell script, Java program, Perl script, and on and on. After you create the actual contents of your script package, you will then load that asset into the IBM Workload Deployer catalog.
Once loaded into the catalog, you define several attributes of your script package, including the executable command, command arguments, variables, execution time, and more. The process for defining these attributes is trivial using the intuitive UI in IBM Workload Deployer, but I wanted to take a little time to remind you of a technique I recommend to all users defining script packages. You can actually package a JSON file within the script package that defines all of the script's attributes. The format of the file is simple, and I am including an example below:
The example above is one taken from a script package in our samples gallery, and it shows the basics of which you need to be aware. Notice that in the JSON file, you can provide a name, description, unzip location, executable command, command arguments, variables, and more. You only need to ensure that the name of this JSON file is cbscript.json and that you include it at the root of the script package archive. Once you have done that, you load the script package archive into the catalog, refresh the script package details, and voila -- all the attribute definitions appear!
You may ask why I recommend this since it could seem like an unnecessary step. My answer to that is that you have to define these attributes anyway, so you might as well capture it once in the file. Once you capture it once in the file, you can ensure that if the same script needs to be reloaded, or if you need to move it to another appliance, its definition will be exactly the same (and presumably correct). I use this approach for all of my work, and for all of the samples I contribute to our gallery, and it really saves me a lot of misplaced effort that can result from typos. If you are out there creating script packages, try adopting this approach. I'm pretty sure you will be happy you did!
A while back I co-authored an article along with Chris Ahl from Tivoli and Ken Klingensmith from WebSphere Technical Sales about the customization of virtual images in WebSphere CloudBurst. In the article we approached image customization as a means to enable IBM Tivoli Monitoring for the operating system within virtual machines dispensed by WebSphere CloudBurst. Today I posted a short demonstration that discusses and shows this particular integration scenario. If you are interested, but haven't had time to read the article, you may want to watch the video first as it should give you a good overview of the process and results.
Talk of Tivoli reminds me that IBM Pulse 2010 is just around the corner. I'll be going to discuss WebSphere CloudBurst and how it can be paired with software from IBM Tivoli for high-value integration scenarios. In the session I'll be talking about the Tivoli Monitoring integration as well as other key points such as our integration with Tivoli Service Automation Manager, IBM CloudBurst, and more. The best part about the session is that I will be co-presenting alongside a WebSphere CloudBurst customer that will dole out practical advice for using WebSphere CloudBurst within the enterprise. Join us on Tuesday February 23rd from 3:30 - 4:30 in Conference Center 306.
Remember, any time you have questions about WebSphere CloudBurst please pass them along. You can leave comments on this blog, or you can reach me at my new Twitter location @damrhein.
Among the major features of the new virtual application pattern in IBM Workload Deployer is the notion of elasticity. That is, as your application needs more resources, it gets them. When your application can meet its SLAs with fewer resources, the environment shrinks. With this kind of pattern, you enable elasticity by specifying a policy and defining the scaling trigger (i.e. CPU usage, application response times, database response times, etc.). What may have been a bit lost in some of these new announcements regarding IBM Workload Deployer is the fact that you can now leverage this core feature of cloud, elasticity, in your virtual system patterns.
If you have read this blog in the past, you probably already know that the Intelligent Management Pack is an option for virtual system patterns built using WebSphere Application Server Hypervisor Edition. When you enable the Intelligent Management Pack option, you are essentially building and deploying WebSphere Virtual Enterprise (WVE) environments. For those of you not familiar with WVE, the best way to describe it is that it provides you with application and application infrastructure virtualization capabilities. Of its many capabilities, one most germane to our discussion today is the ability for users to attach SLAs to applications and then have WVE automatically prioritize requests and manage resources in order to meet those SLAs. Inherent in this capability is the ability to dynamically start and stop application server processes (JVMs) as required. In other words, WVE provides JVM elasticity.
The fact that WVE provides JVM elasticity is nothing new. Further, IBM Workload Deployer started providing virtual machine (VM) elasticity in previous versions (when it was WebSphere CloudBurst). With this feature, you could add or remove VMs to an already deployed virtual system using dynamic virtual machine operations provided by the appliance. The catch was that the VM elasticity was a manual action and you could not link this elasticity to the same SLAs tied to your applications. Well, thanks to a new feature in WebSphere Virtual Enterprise and easy integration provided by the Intelligent Management Pack, this is no longer the case.
Starting in IBM Workload Deployer 3.0, you can take advantage of a new WVE feature called Elasticity Mode when using the Intelligent Management Pack. Elasticity mode is not unique to IBM Workload Deployer, but a concept new to the base WVE product. It allows one to define actions for how WVE should grow and shrink the set of nodes used by application server resources. Like the basic JVM elasticity capability in WVE, these node elasticity actions trigger based on SLAs tied to your applications. Consider the case that you are using elasticity mode and your application is not currently meetings its SLA. If WVE does not think it can start any more application server instances on the current set of nodes, it will grow the set of nodes per your elasticity configuration. Conversely, if WVE detects that it can meet SLAs with fewer nodes, it will shrink the resources per your elasticity configuration.
In IBM Workload Deployer, using elasticity mode becomes even easier. All you need to do is use the Intelligent Management Pack and enable the elasticity mode option in your virtual system patterns. When you do this, you get automatic integration between IBM Workload Deployer and the deployed WVE environment. What does that mean? It means that if WVE detects it needs more nodes, it will automatically call back into IBM Workload Deployer and request that the appliance provision a new VM that will serve as a node for application server processes. It also means that if WVE detects it could meet SLAs with fewer resources, it will call into IBM Workload Deployer and ask it to remove a node. All of this happens without any user scripting. All you have to do is enable this option in your patterns and configure SLAs appropriate for your applications.
To me, this exciting new feature brings out the best of elasticity capabilities in both IBM Workload Deployer and WebSphere Virtual Enterprise. The result is a single management plane that gives you both VM and JVM elasticity for your cloud-based application environments. Best of all, elasticity actions map directly to SLAs for your applications. After all, when it comes to cloud, it's the application that really matters!
The reason I suggest the application proxy approach is twofold. First, it affords you the ability of having custom interactions with the REST API. For instance, you may insert logic into the server-side proxy code that returns only a subset of the JSON data contained in the response from the appliance. Alternatively, in an effort to reduce the chattiness on your client-side, you may join JSON data from multiple different REST requests to the appliance to fulfill a single client request. You may even decide to represent the data in an all together different format than JSON. All of these options and many more are available to you if you implement an application-based proxy to the REST API.
The second reason I suggest the application approach is that it is easier, and seemingly safer, to not deal with user passwords on the client-side. If you setup your application proxy, you can configure it to retrieve the appropriate password from a secure location (like an encoded file) based on information passed along in the request. This means the password information is only present in the request (in encoded form of course) from the application proxy to the WebSphere CloudBurst Appliance.
The good news about the application-based proxy approach is that it is simple to put in place. I composed one using the open source Apache Wink project. The Apache Wink project is an open source implementation of the JAX-RS specification (and then some), and it enables you to develop POJOs that are in turn exposed in a RESTful manner. In my case, I had a single resource POJO:
The Apache Wink runtime routes any HTTP GET request whose path is like /resources/* to the getResources method in the WCAResource class. This method passes along information taken from the query string (the host name of the target WebSphere CloudBurst Appliance and the requesting WebSphere CloudBurst username), as well as the HTTP path information and sends it on to the getResource method declared as follows:
The getResource method above uses the WebSphere CloudBurst host name and the request path to construct the URL for the corresponding WebSphere CloudBurst REST API call. Next, it constructs an Apache Wink Resource object and sends the REST request along to the WebSphere CloudBurst Appliance. How do we authenticate this request? We use the WebSphere CloudBurst username (sent as a query string parameter) to retrieve the appropriate encoded password information. Once we have that, we construct the necessary header for basic authorization over SSL.
The application-based proxy shown here is simply a pass-through. It does not manipulate the data returned from the WebSphere CloudBurst REST API, nor does it map a single client-side call to multiple REST requests. However, it would be simple enough to extend it to do any of those things. If you have any questions about the code here, please let me know. I'd be happy to share more of the code, or talk about how and where to extend it.
One of the things that often comes up at some point in IBM Workload Deployer conversations is the notion of self-service access. Specifically, users want to know what the appliance provides that enables them to allow various teams in their organization to directly deploy the middleware environments they need. In other words, they want to use IBM Workload Deployer to tear down the traditional barriers that exist between those that request the environment and those that fulfill said request. Now, as we begin to elaborate on this notion, it becomes quickly apparent that in order to effectively enable self-service, IBM Workload Deployer must deliver a few things.
First, IBM Workload Deployer must provide the means to define users with various levels of access. Second, IBM Workload Deployer must provide the means to define resource access at a fine-grained level to different users and groups of users. Check and check. The appliance has been doing this since the beginning of WebSphere CloudBurst. Without those two things, the conversation of self-service access would end pretty quickly. However, there is a final capability that is equally important: IBM Workload Deployer must deliver a means to limit resource consumption at a fine-grained level.
In IBM Workload Deployer there are a couple of ways to achieve this. First, you could define multiple cloud groups and allow access to those groups in a way that maps directly to resource entitlements. While that may work in some situations, others call for even more granularity. You may want to allow multiple different users or groups to access a cloud group, but you may want to allow different consumption limits for each of these groups. In this situation, you can take advantage of environment profiles and a new option when defining users of IBM Workload Deployer.
Consider the case that you have a group of developers and you want to limit their consumption of memory in the cloud. First, you start by defining your development users and for each you select Environment Profile Only as the value for the Deployment Options field.
By selecting the above value for the deployment options of a user, you restrict that user to only deploying via an environment profile as opposed to general cloud group deployments. After defining all of your development users, you may choose to organize them into a user group for easier management. At that point, you can define environment profiles and determine which ones your developers should have access to using the Access granted to field of the profile.
Within the environment profile, you can define resource consumption limits for compute resource and software licenses. For instance, you can define a limit on the amount of virtual memory consumed by all deployments using the profile. It is important to note that the limit is cumulative for ALL deployments that use the profile.
Now that all of the controls are in place, consider the deployment process for one of your development users. They pick a virtual system pattern, click the deploy icon and begin to configure the pattern for deployment. In the Choose Environment section of the deployment dialog, your development user will only be able to select the Choose profile option for deployment. Further, they will only be able to deploy using the environment profiles to which they have access.
After the deployment completes, a look at the Environment limits section in the profile shows the current usage totals.
Now suppose another development user, or even the same one, comes along and attempts to deploy another virtual system pattern even though the profile limits have already been reached. The user can initiate the deployment, but they will get a near immediate failure owing to the fact that they would exceed consumption limits if the deployment were allowed to proceed.
The same kind of enforcement occurs regardless of the resource limit type. You can use this approach to limit the consumption of CPU, virtual memory, storage, or software licenses among the various different users or groups of users you define in IBM Workload Deployer. If you combine fine-grained resource consumption limits with varying permissions and fine-grained access, I think you are on the road to truly enabling self-service in the enterprise.
I write a lot about WebSphere CloudBurst script packages. Typically, I write about what they are, how to create them, and even provide some samples from time to time. I find that most of the time I'm either writing or talking about script packages from the standpoint that they allow you to automate the delivery of customizations to environments you deploy with WebSphere CloudBurst. More specifically, I usually explain how you can include these script packages in your patterns to ensure that your custom scripts execute as part of every pattern deployment. The truth is, that is not the whole story. In fact, it's only 1/3 of the story.
In WebSphere CloudBurst, when you define a script package you also define its execution mode. The execution mode can be one of three values, and it indicates the invocation time for the script. The default value is at virtual system creation, and that tells WebSphere CloudBurst to automatically invoke the script as part of the deployment process. This seems to be the most commonly used execution mode, and in the original version of WebSphere CloudBurst it was the only available mode (which probably attributes to why I only usually tell 1/3 of the story here). As you may expect, there is a wide range of usage scenarios for this class of script packages including installing applications, activating monitoring agents, registering cells with an externally managed DNS server, and much more.
If you are like me (and many humans), you enjoy and actually expect symmetry. In that regard, it probably comes as no surprise that there is a script package execution mode called at virtual system deletion. As the name indicates, this class of script packages executes as an automatic part of the virtual system deletion process. When a user tells WebSphere CloudBurst to remove a virtual system, before it shuts down the machines in the system, it will run each script package marked to execute at virtual system deletion. Typical use cases for these scripts include removing information about the cell from externally managed DNS servers, freeing up connections with external systems, and other external 'clean up' activities.
So this leaves the final execution mode for script packages, the when I initiate it mode to be precise. This class of script packages executes when explicitly triggered by a user. In the virtual machine detail section for a deployed virtual system, you can see a list of user-initiated script packages for a given machine. There is a start button by each of the user-initiated script packages that allows you to invoke the script when, and as many times as you need to. While these script packages have many different use cases, the most common use case is to deploy application updates. Users build these application update scripts, attach them to a pattern, and invoke them whenever they want to deliver an updated application into their already deployed environment.
WebSphere CloudBurst script packages are one of the main vehicles for delivering your customizations to your cloud environments. The three execution modes mentioned above allow you to determine when the right time to deliver those customizations is.
IBM Impact 2012 was just last week with a theme of "Change the Game" ... and I'm still reveling in all of the excitement and energy that goes into conferences such as this. I was fortunate to get a last minute spot to attend the conference and help out at the Solution Center where I had the chance to speak to a lot of customers and other IBMers interested in cloud computing. Among the many things that stood out - there is certainly a lot of interest in cloud computing and patterns of expertise - it also seems that folks are ready to get some first hand experience with these patterns. There's plenty of opportunity for that!
It does not seem like it has been a year, but here we are again. It is time for IBM Impact 2012, and like each year, this one promises to be a little better than its predecessors. As I type this post, I am 36,000 feet above either Texas or New Mexico on my way to the neon desert for a completely packed week. I can't wait to arrive!
An obvious summary of IBM Impact would be to say that it is a technology conference. That does not quite do it justice though. The event is packed full with stories of business transformation, emerging business paradigms and the technologies that support them, new product announcements and much more. That said, in my mind IBM Impact is first and foremost a premier technical education conference. The week is stuffed with technical session after technical session on a wide range of topics.
With that in mind, I thought I would share a few of the sessions I have highlighted on my calendar. To be honest, I had a hard time setting up my calendar for the week. In some cases I ended up booking three sessions in one time slot. There are simply too many good sessions to choose from, so this list is nowhere near exhaustive, and it is certainly not my full calendar!
1219 Overview of the IBM Mobile Foundation :: Monday 10:45 AM - 12:00 PM :: Palazzo N - Venetian
Summary: This session will provide an overview of the new IBM Mobile Foundation: a new middleware offering from IBM that will enable customers to build and deliver innovative mobile applications, centrally govern and manage their mobile infrastructure, and integrate with existing enterprise data and services. Attendees will leave with an understanding of what the platform is and how it can help them effectively and efficiency take advantage of mobile for their enterprise.
2138 Elastic Caching - Foundational Technology for Your Solutions and Offerings :: Monday 2:00 PM - 3:15 PM :: Palazzo J - Venetian
Summary: This session will provide an overview of elastic caching, explain IBM's offerings and technology and will share a set of usage scenarios that will demonstrate why this technology is so hot -- and why it can dramatically benefit our partners' offerings, solutions and ROI.
1371 Introducing IBM WebSphere Application Server v8.Next - Enhanced ND: A Huge Step Forward! :: Tuesday 10:45 AM - 12:00 PM :: Palazzo I - Venetian
Summary: Setting the bar higher for app server resiliency and robustness, IBM WebSphere Application Server Network Deployment v8.Next sets itself even further apart from the industry. Now included with WAS ND is virtualization, improved availability and health monitoring, Java batch processing and more. This session covers the details.
2484 Cloud, Virtualization and Application Pattern Trends and Directions :: Tuesday 1:30 PM - 2:45 PM :: Palazzo E - Venetian
Summary: Cloud and virtualization is being pared with a new best practices-based approach to application development, deployment and automation of custom and independent software vendor applications across a range of deployment environments. Whether you're targeting existing hardware and software stacks, new private cloud infrastructure or public cloud resources, or all three, a pattern-based approach to applications can deliver unmatched portability and time to market. Cloud computing is helping to deliver a level of automation and self service needed in todays dynamic business landscape. Learn how these technologies are unfolding, and what your company can do to get started today to drive speed, efficiency and lower total cost of ownership across your IT investments.
1520 Building Custom Content for Expert Integrated Systems :: Wednesday 10:45 AM - 12:00 PM :: Palazzo G - Venetian
Summary: This session will cover all the different ways that new functionality can be developed for use with IBM Workload Deployer and IBM PureApplication System. This will include the ICON Image Construction tool, Capture and Extend, and also the IWD PDK.
1563 Positioning Expert Integrated Systems with Its Competitors :: Wednesday 3:15 PM - 4:30 PM :: Palazzo F - Venetian
Summary: (Plug Alert! -- I will be co-presenting this session) IBM PureApplication System provides a virtualized platform of cost effective, next generation hardware with an optimized capabilities that automates workload lifecycle management, from deployment to quiescence. How is it different from other solutions that promise the same benefits? Join us as we examine the unique capabilities of IBM PureApplication System. Learn about the value of IBM PureApplication System for your business, and why it is truly heads and shoulders above the competition! Explore in detail why IBM PureApplication System can better deliver on these capabilities than other alternatives such as Oracle's Exalogic. Comparisons will be based on quantitative metrics using results from actual experiences with both products.
2150 Building a Private Cloud Using IBM Technology and Fit-for-Purpose Methodology :: Wednesday 4:45 PM - 6:00 PM :: Marcello 4401A - Venetian
Summary: In this session, we will examine a practical approach for organizations to optimize their computing environment by using IBM WebSphere technology. We explore the use of IBM's fit for purpose methodology for optimal workload placement, how the use of IBM's Workload Deployer, IBM Datapower, the IBM Rational Automation Framework for WebSphere and WebSphere Virtual Enterprise can be used in the development of a private cloud that maximizes your total computing environment.
2390 WAS vs. WebLogic, JBoss and Tomcat: An IBM Perspective :: Thursday 8:45 AM - 10:00 AM :: Lido 3105 - Venetian
Summary: Are you considering an Oracle WebLogic or an open source application server like Tomcat or JBoss? In this session we will discuss key factors to consider when making a decision on which application server to use, such as cost of licenses and support, performance, availability and usability lab tests, administrative and development tools, and real world customer experiences. We will discuss factors that contribute to TCO such as development and operating costs, and application performance and reliability. We will discuss how new capabilities of WAS v8.Next enhance its competitive position. Session will be presented by Roman Kharkovski, who has been a technical lead on the WW WebSphere Competitive Team since 1999 and Stuart Smith, who is lead consultant with Web Age Solutions and worked with all major application servers and Java since 1998.
Summary: eXtremeMemory allows you to store objects in native memory instead of on the Java heap. By moving objects off the Java heap, you can avoid garbage collection pauses, leading to more consistent performance and predictable response times.
These are just a few of the interesting sessions I have highlighted on my calendar. I am going to sit in on many more, and I will be writing a summary of the event soon enough. For those of you heading to IBM Impact, safe travels and I hope to see you there!
To continue with the series of blog posts regarding WebSphere CloudBurst FAQs, I want to take a look at one aspect of the deployment process.
When you leverage WebSphere CloudBurst to push patterns (complete WebSphere Application Server configurations) into a private cloud, the appliance provides an advanced placement algorithm to determine exactly where the resulting WebSphere virtual systems will reside. It attempts to match the needs of the pattern to the correct set of hypervisors that have been defined. WebSphere CloudBurst considers things like storage, CPU, memory, and high availability characteristics when placing the pattern, and this is all done by the appliance without you having to intervene at all.
This is certainly nice in that it absolves you from having to make such placement decisions. Having said this though, you may be thinking of a question that comes up quite often:
If WebSphere CloudBurst controls the placement of the pattern, how can I make sure that certain deployments end up on certain servers (hypervisors)?
Considering what I just told you above, it may not seem that it's possible to control what machines end up hosting your virtual system since the appliance takes care of that placement for you. However, the organized use of WebSphere CloudBurst cloud groups allows you to take advantage of the intelligent placement provided by the appliance while retaining a level of control over which machines end up hosting particular deployments.
In WebSphere CloudBurst all patterns are deployed to cloud groups. Cloud groups are a collection of hypervisors that have been defined within the appliance. The basic deployment mapping is depicted in the image below:
As seen above, you can create a cloud group for any purpose (dev, test, QA, production, etc.), including any hypervisors that you desire as long as a given hypervisor only belongs to a single cloud group. When you are ready to deploy a pattern, you simply select the cloud group you want to deploy to:
By selecting a cloud group for deployment, you are implicitly selecting the physical machines that will host your deployment. The cloud group could consist of anywhere from one to N hypervisors, so you are afforded the ability to restrict the location of your virtual systems as necessary.
I hope this helped explain a little bit about cloud groups in WebSphere CloudBurst. If you're looking for more information about WebSphere CloudBurst cloud groups, I'd also suggest you watch this video on our YouTube channel.
Since the IMPACT conference, there has been quite a bit of buzz around the new features, capabilities, and enhancements coming in WebSphere CloudBurst 2.0. In addition to the updates for the appliance, there are some updates to the IBM Hypervisor Edition virtual images as well. In particular, there is one new offering that I want to make sure is getting more than a mere 15 minutes of fame.
What is this new offering that deserves some time in the spotlight? Well, it is the Intelligent Management Pack for the WebSphere Application Server Hypervisor Edition. Still not sure what this is? Simply put, it is an optional add-on to the WebSphere Application Server Hypervisor Edition that enables WebSphere Virtual Enterprise capabilities in the environments dispensed by WebSphere CloudBurst.
If you are not familiar with WebSphere Virtual Enterprise, this still may not mean much yet. Essentially, the use of the Intelligent Management Pack means you create environments that contain capabilities to dynamically manage your application runtime environment. This includes, but is not limited to, the following capabilities:
Dynamic clustering: Create WebSphere Application Server clusters whose membership changes autonomically in order to meet the needs of your applications. You create service level agreements to define the needs for your applications.
Application health monitoring: Monitor the health of your applications by assigning health policies. These policies designate the condition to monitor for (i.e. memory leaks), and they dictate what action to take in case the condition occurs (i.e. restart the server).
Application editioning: Manage multiple versions of your applications and roll out new versions of your applications without incurring downtime. This is essential if you consistently deliver updates to your applications deployed in production environments.
On-Demand routing: Build WebSphere CloudBurst patterns that include On-Demand Router parts. On-Demand Routers are a key component of WebSphere Virtual Enterprise environments and act as an enabler of some of the functionality discussed above.
If you are a user of WebSphere Virtual Enterprise, or otherwise knowledgeable with the product, the Intelligent Management Pack should be pretty familiar to you. When you deploy a pattern built from WebSphere Application Server Hypervisor Edition with the Intelligent Management Pack, you end up with a WebSphere Virtual Enterprise cell. When you log into the administration console, you will see the WebSphere Virtual Enterprise console. You can use any of the features in the normal WebSphere Virtual Enterprise product in the environment created by WebSphere CloudBurst.
Be on the lookout for more information concerning the Intelligent Management Pack. I know there is an article in the works, and we will also be working on some short demos for our YouTube channel. In the meantime, please reach out to me here or on Twitter (@damrhein) with any questions or comments.
The 1.1.1 version of WebSphere CloudBurst is now available on the IBM support site, and you can read a bit about it here. I have not blogged about each and every point release of WebSphere CloudBurst here, but this particular one is significant. The 1.1.1 release adds support for IBM's z/VM hypervisor platform as a deployment target.
Quite simply this means that you can now create virtualized WebSphere application environments on the z/VM platform using WebSphere CloudBurst. This starts by first defining target hypervisors, instances of Linux Master Systems, that WebSphere CloudBurst can communicate with to setup virtual machines on z/VM. Coupled with support for the z/VM infrastructure components, there is a new version of the WebSphere Application Server Hypervisor Edition virtual image. While this new image contains the same basic components as the previous hypervisor edition images, it is packaged for the z/VM platform, and it includes a zLinux operating system.
Once you upgrade to WebSphere CloudBurst 1.1.1, you can define your z/VM infrastructure and use the new WebSphere Application Server Hypervisor Edition image to build custom patterns targeted for the z/VM platform. I put together a demonstration that provides a very brief overview of these new capabilities. As always, please reach out if you have any questions about this or any other WebSphere CloudBurst topic.