Implement the rollback procedure in Ansible
The objective of this issue is describe the most suitable rollback strategy in case of any problem during the upgrade.
I would consider creating a cascade cluster on the new Ubuntu version, and to upgrade promote the new cluster.
To rollback I would initially consider re promote the old cluster.
Please let's add more ideas here.
Acceptance criteria:
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Document the procedure for rollback and all the steps
Edited by Jose Finotto