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docs: add OMAP quick fix warning to upgrade guide #9187

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docs: add OMAP quick fix warning to upgrade guide #9187

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43 changes: 43 additions & 0 deletions Documentation/ceph-upgrade.md
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Expand Up @@ -416,6 +416,49 @@ updated we wait for things to settle (monitors to be in a quorum, PGs to be clea
MDSes, etc.), then only when the condition is met we move to the next daemon. We repeat this process
until all the daemons have been updated.

### Disable `bluestore_fsck_quick_fix_on_mount`
> **WARNING: There is a notice from Ceph for users upgrading to Ceph Pacific v16.2.6 or lower from
> an earlier major version of Ceph. If you are upgrading to Ceph Pacific (v16), please upgrade to
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> v16.2.7 or higher if possible.**

If you must upgrade to a version lower than v16.2.7, ensure that all instances of
`bluestore_fsck_quick_fix_on_mount` in Rook-Ceph configs are removed.

First, Ensure no references to `bluestore_fsck_quick_fix_on_mount` are present in the
`rook-config-override` [ConfigMap](ceph-advanced-configuration.md#custom-cephconf-settings). Remove
them if they exist.

Finally, ensure no references to `bluestore_fsck_quick_fix_on_mount` are present in Ceph's internal
configuration. Run all commands below from the [toolbox](ceph-toolbox.md).

In the example below, two instances of `bluestore_fsck_quick_fix_on_mount` are present and are
commented, and some output text has been removed for brevity.
```sh
ceph config-key dump
```
```
{
"config/global/bluestore_fsck_quick_fix_on_mount": "false", # <-- FALSE
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For a simpler doc, how about we remove all the lines that are not the settings we are looking at?

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I can remove most of them, but I think it's useful to see a few examples of non-relevant lines for comparison.

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Notably, I was a little confused by the osd_scrub_auto_repair setting, so I think it's good to show as an irrelevant example in the output. And a couple examples of other config paths (the mgr and mgr.a in this case).

"config/global/osd_scrub_auto_repair": "true",
"config/mgr.a/mgr/dashboard/server_port": "7000",
"config/mgr/mgr/balancer/active": "true",
"config/osd/bluestore_fsck_quick_fix_on_mount": "true", # <-- TRUE
}
```

Remove the configs for both with the commands below. Note how the `config/...` paths correspond to
the output above.
```sh
ceph config-key rm config/global/bluestore_fsck_quick_fix_on_mount
ceph config-key rm config/osd/bluestore_fsck_quick_fix_on_mount
```

It's best to run `ceph config-key dump` again to verify references to
`bluestore_fsck_quick_fix_on_mount` are gone after this.

See for more information, see here: https://github.com/rook/rook/issues/9185


### **Ceph images**

Official Ceph container images can be found on [Quay](https://quay.io/repository/ceph/ceph?tab=tags).
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