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9.3. Rebooting Ceph Storage Nodes

9.3. Rebooting Ceph Storage Nodes

To reboot the Ceph Storage nodes, follow this process:

Select the first Ceph Storage node to reboot and log into it.

Disable Ceph Storage cluster rebalancing temporarily:

sudo ceph osd set noout
sudo ceph osd set norebalance

$ sudo ceph osd set noout
$ sudo ceph osd set norebalance

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Reboot the node:
```
sudo reboot
```
```
$ sudo reboot
```
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Wait until the node boots.
Log into the node and check the cluster status:
```
sudo ceph -s
```
```
$ sudo ceph -s
```
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Check that the pgmap reports all pgs as normal (active+clean).
Log out of the node, reboot the next node, and check its status. Repeat this process until you have rebooted all Ceph storage nodes.

When complete, enable cluster rebalancing again:

sudo ceph osd unset noout
sudo ceph osd unset norebalance

$ sudo ceph osd unset noout
$ sudo ceph osd unset norebalance

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Perform a final status check to make sure the cluster reports HEALTH_OK:
```
sudo ceph status
```
```
$ sudo ceph status
```
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