[GSTG][2023-04-26T14:30Z] Upgrade Test: PostgreSQL to PG14 on Registry, Main and CI patroni clusters
Production Change
Change Summary
As defined in &801 (closed) / https://gitlab.com/gitlab-com/gl-infra/reliability/-/issues/16443 this will roll-out test the PostgreSQL 14 upgrade in [GSTG]
on the Main and CI clusters.
Due to multiple open issues and untested hot-fixes, as well as the requirement to prevent a long timespan between [GSTG]
and [GPRD]
upgrade, it was decided to NOT roll out today!
We will however execute all steps except the final switchover to new cluster. This will enable us to test most of the procedure, improve it and execute the roll-out with confidence.
Change Details
- Services Impacted - ServicePostgres Database
- Change Technician - @bshah11 @alexander-sosna
- Change Reviewer - @NikolayS @vitabaks @rhenchen.gitlab
- Time tracking - 4 hour
- Downtime Component - Small, will be evaluated.
Detailed steps for the change
This CR is for staging, however, to follow the same process as we would for production, we will pretend that GitLab.com would be unavailable during the execution of the CR and we'll use ops.gitlab.net for the detailed instructions. We will use the following issue for each patroni cluster:
-
Registry Cluster - https://ops.gitlab.net/gitlab-com/gl-infra/db-migration/-/issues/46 -
CI Cluster - https://ops.gitlab.net/gitlab-com/gl-infra/db-migration/-/issues/47 -
Main Cluster - https://ops.gitlab.net/gitlab-com/gl-infra/db-migration/-/issues/48
Change Reviewer checklist
-
Check if the following applies: - The scheduled day and time of execution of the change is appropriate.
- The change plan is technically accurate.
- The change plan includes estimated timing values based on previous testing.
- The change plan includes a viable rollback plan.
- The specified metrics/monitoring dashboards provide sufficient visibility for the change.
-
Check if the following applies: - The complexity of the plan is appropriate for the corresponding risk of the change. (i.e. the plan contains clear details).
- The change plan includes success measures for all steps/milestones during the execution.
- The change adequately minimizes risk within the environment/service.
- The performance implications of executing the change are well-understood and documented.
- The specified metrics/monitoring dashboards provide sufficient visibility for the change.
- If not, is it possible (or necessary) to make changes to observability platforms for added visibility?
- The change has a primary and secondary SRE with knowledge of the details available during the change window.
- The labels blocks deployments and/or blocks feature-flags are applied as necessary
Change Technician checklist
-
Check if all items below are complete: - The change plan is technically accurate.
- This Change Issue is linked to the appropriate Issue and/or Epic
- Change has been tested in staging and results noted in a comment on this issue.
- A dry-run has been conducted and results noted in a comment on this issue.
- The change execution window respects the Production Change Lock periods.
- For C1 and C2 change issues, the change event is added to the GitLab Production calendar.
- For C1 and C2 change issues, the SRE on-call has been informed prior to change being rolled out. (In #production channel, mention
@sre-oncall
and this issue and await their acknowledgement.) - For C1 and C2 change issues, the SRE on-call provided approval with the eoc_approved label on the issue.
- For C1 and C2 change issues, the Infrastructure Manager provided approval with the manager_approved label on the issue.
- Release managers have been informed (If needed! Cases include DB change) prior to change being rolled out. (In #production channel, mention
@release-managers
and this issue and await their acknowledgment.) - There are currently no active incidents that are severity1 or severity2
- If the change involves doing maintenance on a database host, an appropriate silence targeting the host(s) should be added for the duration of the change.