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ceph server: document full cluster shutdown

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Signed-off-by: Aaron Lauterer <a.lauterer@proxmox.com>
Reviewed-by: Alexander Zeidler <a.zeidler@proxmox.com>
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Aaron Lauterer 2024-05-28 13:54:20 +02:00 committed by Thomas Lamprecht
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@ -1080,6 +1080,56 @@ scrubs footnote:[Ceph scrubbing {cephdocs-url}/rados/configuration/osd-config-re
are executed.
[[pveceph_shutdown]]
Shutdown {pve} + Ceph HCI cluster
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
To shut down the whole {pve} + Ceph cluster, first stop all Ceph clients. These
will mainly be VMs and containers. If you have additional clients that might
access a Ceph FS or an installed RADOS GW, stop these as well.
Highly available guests will switch their state to 'stopped' when powered down
via the {pve} tooling.
Once all clients, VMs and containers are off or not accessing the Ceph cluster
anymore, verify that the Ceph cluster is in a healthy state. Either via the Web UI
or the CLI:
----
ceph -s
----
To disable all self-healing actions, and to pause any client IO in the Ceph
cluster, enable the following OSD flags in the **Ceph -> OSD** panel or via the
CLI:
----
ceph osd set noout
ceph osd set norecover
ceph osd set norebalance
ceph osd set nobackfill
ceph osd set nodown
ceph osd set pause
----
Start powering down your nodes without a monitor (MON). After these nodes are
down, continue by shutting down nodes with monitors on them.
When powering on the cluster, start the nodes with monitors (MONs) first. Once
all nodes are up and running, confirm that all Ceph services are up and running
before you unset the OSD flags again:
----
ceph osd unset pause
ceph osd unset nodown
ceph osd unset nobackfill
ceph osd unset norebalance
ceph osd unset norecover
ceph osd unset noout
----
You can now start up the guests. Highly available guests will change their state
to 'started' when they power on.
Ceph Monitoring and Troubleshooting
-----------------------------------