Prerequisites

Verify the Configuration Files

Verify the Contrail Cloud deployment configuration files to ensure all configuration settings are accurate and adhere to a proper schema.

• Verify all the YAML files in the /var/lib/contrail_cloud/config directory to ensure all values match the expected results.

• Run a schema check against your configuration files:

Check the Cloud Health

Verify that Contrail Cloud is healthy and all services are active. Problems with the cloud health can cause errors during the update process. Use the resources below to help verify your cloud health:

• Contrail Cloud Deployment Guide.

• Use the "Verify Quorum and Node Health" section in the Node Reboot and Health Check topic.

• See also, Red Hat OpenStack Using the Validation Framework.

Back up the Undercloud and Overcloud

Use the following resources for backup instructions:

• Backing Up and Restoring the Undercloud and Control Plane Nodes

• Backing Up the Overcloud Control Plane Services

• How to Backup and Restore Contrail Databases in JSON Format in Openstack Environments

Pause and Shutdown Business Services

The integrity of API calls is not guaranteed during the update. It is recommended to pause or shutdown the external business services to ensure a smooth update. This helps to prevent data loss or a workload error. See the documentation for your specific service instructions.

It is recommended to do the following:

• Quiesce all external API requests. For example, Horizon.

• Perform a graceful shutdown on any vulnerable workloads.