Draft: Support near zero-downtime upgrade
What does this MR do?
This change introduces the workflow to automate the near-zero downtime upgrade as it is implemented in GitLab Operator V1.
The controller consults the status of the GitLab resource to distinguish between install and upgrade workflows. A basic heuristic is incorporated to avoid upgrade gaps which may result in an incosistent state of the GitLab instance.
Reference:
Author's Checklist
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Required
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Ensure a release milestone is set. -
MR title and description are up to date, accurate, and descriptive. -
MR targeting the appropriate branch. -
MR has a green pipeline on GitLab.com. -
When ready for review, MR is labeled workflowready for review per the MR workflow.
Expected
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Test plan indicating conditions for success has been posted and passes. -
Documentation is created or updated. -
Tests are added.
Related issues
Closes #6
Edited by Hossein Pursultani