Installing and configuring cloud-init on Ubuntu

Install cloud-init on Ubuntu

1. Before you install cloud-init, you must install the dependencies for cloud-init from the operating system base and supplemental media, by using apt-get, or any other package manager.
2. For Ubuntu 16:
   1. Obtain the RPM from /opt/ibm/powervc/images/cloud-init/ubuntu on the PowerVC management server and install it on the virtual machine.
      • Ubuntu 16: cloud-init_19.1-1.ibm.ubuntu.deb

        Install cloud-init by running apt-get install downloaded_path/cloud-init_19.1-1.ibm.ubuntu.deb. Make sure you provide complete Debian package path during installation.

        To uninstall any older versions, run apt-get remove cloud-init and then run apt-get purge cloud-init.

        Note: If the virtual machine already has a cloud-init Debian package installed, the existing Debian package must be uninstalled before installing the PowerVC version of the Debian package.
   2. Run apt-mark hold cloud-init. This ensures that the PowerVC cloud-init bundle is not overwritten by a different version when running apt-get upgrade.
   3. Do the following:
      1. In /lib/udev/rules.d/73-special-net-names.rules, comment out the line containing DRIVERS=="ibmveth".
      2. Run update-initramfs -u.
      3. Modify /etc/network/interfaces to change references to ibmvethN to eth0. Comment out hwaddr if it is present.

3. For Ubuntu 18.04 (KVM on Power® only):
   1. Run sudo apt install cloud-init.
   2. Rename /etc/netplan/01-netcfg.yaml to /etc/netplan/51-netcfg.yaml.
      Note: After deploying the virtual machine, it is recommended that you navigate to this file on the virtual machine: /etc/netplan/51-netcfg.yaml, and update it with the current network information.
4. Modify the cloud.cfg file available at /etc/cloud/cloud.cfg with the following values.
   • For Ubuntu 16:cloud-init_19.1-1.ibm.ubuntu.deb:
     Modify these values, if they exist. Add any of these values that are missing:

     disable_root: false
     

     Add these values after preserve_hostname and remove disable_ec2_metadata module from /etc/cloud/cloud.cfg:

     datasource_list: [ ConfigDrive, None ]
     datasource:
       ConfigDrive:   
         dsmode: local
     

     Enable and start the cloud-init related services by issuing the following commands:

     systemctl enable cloud-init-local.service
     systemctl enable cloud-init.service
     systemctl enable cloud-config.service
     systemctl enable cloud-final.service
     systemctl start cloud-init.service
     systemctl start cloud-init-local.service
     systemctl start cloud-config.service
     systemctl start cloud-final.service
     

     Run cloud-init status to check the cloud-init status. Make sure the status shows as Done.

5. For Ubuntu 16, follow the steps in PowerVC cloud-init modules. You can enable and configure cloud-init custom modules and control the way cloud-init sets your hostname by modifying the cloud.cfg file as described in this topic.
6. In /etc/ssh/sshd_config, make sure PasswordAuthentication and ChallengeResponseAuthentication is set to yes.