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Add replication example to upgrade docs (#12040)

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Meggie 2021-07-12 13:13:45 -04:00 committed by GitHub
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website/content/docs/upgrading/index.mdx
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@ -114,3 +114,20 @@ Upgrading installations of Vault which participate in [Enterprise Replication](/
- Verify functionality of each secondary instance after upgrading
- When satisfied with functionality of upgraded secondary instances, upgrade
the primary instance
Upgrades of multiple replicated clusters can be complicated. Here is an
example.
![Upgrading multiple replicated clusters](/img/vault-replication-upgrade.png)
In the above scenario, the ideal upgrade procedure would be as follows,
verifying functionality after each cluster upgrade.
1. Upgrade Clusters B and D, using the HA upgrade process above. These clusters
have no downstream clusters, so they should be upgraded first, but the
ordering of B vs D does not matter.
2. Upgrade Cluster C, which now has an upgraded downstream cluster (Cluster D).
Because Cluster C is a cluster, it should also use the HA upgrade process.
3. Finally, upgrade Cluster A. All clusters downstream of A will already be
upgraded. It should be upgraded last, as it is a Performance Primary and a DR
Primary.

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website/public/img/vault-replication-upgrade.png (Stored with Git LFS) Normal file
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