Verifying migration prerequisites

Before you begin migrating from IBM Cloud Manager with OpenStack 4.2 to IBM Cloud Manager with OpenStack 4.3, ensure that your environment meets the prerequisites.

1. The cloud environment is installed by the IBM Cloud Manager with OpenStack 4.2 deployment server, by using Chef cookbooks and one of the following commands.
   • knife os manage deploy topology your-topology-file.json
   • knife os manage deploy cloud your-cloud.yml

   The knife os manage deploy cloud your-cloud.yml command generates the environment and topology files that are stored in the same directory as your cloud file your-cloud.yml. The environment and topology files are used by the migration process.

   Note: The deployment method that is described here must be used for a cloud environment that includes IBM Platform Resource Scheduler, PowerVC driver, z/VM® driver, self-service portal, and so on.
2. The Chef server that is installed by the IBM Cloud Manager with OpenStack deployer on the deployment server must be used only to install OpenStack. The Chef server cannot be used to run users cookbooks for any purpose. Additionally, you must not change the environment or runlist that is assigned to any node.
3. Ensure that any instances that you currently have in draft state in IBM Cloud Manager with OpenStack self-service portal, version 4.2, are launched or deleted before you upgrade to IBM Cloud Manager with OpenStack 4.3. Any instances in draft state are not recognized by the new IBM Cloud Manager - Self Service in version 4.3.