Chapter 7. Upgrading using the playbook

Note

Technology Preview features are not supported with Red Hat production service level agreements (SLAs), might not be functionally complete, and Red Hat does not recommend to use them for production. These features provide early access to upcoming product features, enabling customers to test functionality and provide feedback during the development process.

For more information on Red Hat Technology Preview features support scope, see https://access.redhat.com/support/offerings/techpreview/.

Note

The upgrade playbook does not fail or give any warning if the application pods running on the cluster fails and enters into an error state while running the Openshift Container Storage upgrade. Hence, the cluster administrator needs to check the health of the cluster and all the pods and nodes in the cluster while running the Openshift container Storage upgrade playbook.

Important
  • The upgrade playbook is to be used only while upgrading to the latest available OpenShift Container Storage bits.
Playbook: upgrade.yml

This playbook is intended to upgrade the GlusterFS related resources on an existing OpenShift cluster. This is applicable only for GlusterFS resources that were deployed using the config.yml playbook in the converged mode.
This playbook is in tech-preview and needs to be acknowledged using the variable openshift_storage_gluster_update_techpreview=true.
The same inventory from install should be reused after updating the following variables to the desired version:

  • openshift_storage_glusterfs_image
  • openshift_storage_glusterfs_heketi_image
  • openshift_storage_glusterfs_block_image
  • openshift_storage_glusterfs_fuse_version

7.1. Parameters of upgrade playbook

  • openshift_storage_glusterfs_health_timeout=10: This variable limits the number of cluster health check retries. The variable value should be multiple of 10, 10 means one retry, 20 means 2 retries and this value should not be less than 10. By default value of this var is 30, so do not specify anything and the playbook will do 3 retries.
  • openshift_storage_gluster_update_techpreview=true: The playbook is in tech preview. Set this variable to true for using upgrade playbook.
  • openshift_storage_glusterfs_fuse_version=<version>: To upgrade nodes to specific client packages we need to mention the version of which you want to upgrade.
    example, 
 openshift_storage_glusterfs_fuse_version=-3.12.2-18.el7
  • openshift_storage_glusterfs_check_brick_size_health=false: When the playbook is executing it checks for the brick capacity and while checking brick capacity we need to exclude some bricks from checking, these bricks are the bricks that are part of block hosting volume. For that purpose, we need to set the above variable to false in the inventory file.