proxmox-mirrors/pve-docs
1
0
Fork 0
mirror of https://git.proxmox.com/git/pve-docs synced 2025-04-28 17:49:53 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

ceph: osd: revise and expand the section "Destroy OSDs"

Browse Source 
Existing information is slightly modified and retained.

Add information:
* Mention and link to the sections "Troubleshooting" and "Replace OSDs"
* CLI commands (pveceph) must be executed on the affected node
* Check in advance the "Used (%)" of OSDs to avoid blocked I/O
* Check and wait until the OSD can be stopped safely
* Use `pveceph stop` instead of `systemctl stop ceph-osd@<ID>.service`
* Explain cleanup option a bit more

Signed-off-by: Alexander Zeidler <a.zeidler@proxmox.com>
This commit is contained in:
Alexander Zeidler 2025-02-05 11:08:48 +01:00 committed by Aaron Lauterer
parent 70b3fb96e1
commit 84ba04863c
1 changed files with 28 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

49
pveceph.adoc
View File

@ -502,33 +502,40 @@ ceph-volume lvm create --filestore --data /dev/sd[X] --journal /dev/sd[Y]
Destroy OSDs Destroy OSDs
~~~~~~~~~~~~ ~~~~~~~~~~~~
To remove an OSD via the GUI, first select a {PVE} node in the tree view and go If you experience problems with an OSD or its disk, try to
to the **Ceph -> OSD** panel. Then select the OSD to destroy and click the **OUT** xref:pve_ceph_mon_and_ts[troubleshoot] them first to decide if a
button. Once the OSD status has changed from `in` to `out`, click the **STOP** xref:pve_ceph_osd_replace[replacement] is needed.
button. Finally, after the status has changed from `up` to `down`, select
**Destroy** from the `More` drop-down menu.
To remove an OSD via the CLI run the following commands. To destroy an OSD:
[source,bash] . Either open the web interface and select any {pve} node in the tree
---- view, or open a shell on the node where the OSD to be deleted is
ceph osd out <ID> located.
systemctl stop ceph-osd@<ID>.service
----
NOTE: The first command instructs Ceph not to include the OSD in the data . Go to the __Ceph -> OSD__ panel (`ceph osd df tree`). If the OSD to
distribution. The second command stops the OSD service. Until this time, no be deleted is still `up` and `in` (non-zero value at `AVAIL`), make
data is lost. sure that all OSDs have their `Used (%)` value well below the
`nearfull_ratio` of default `85%`. In this way you can reduce the risk
from the upcoming rebalancing, which may cause OSDs to run full and
thereby blocking I/O on Ceph pools.
The following command destroys the OSD. Specify the '-cleanup' option to . If the deletable OSD is not `out` yet, select the OSD and click on
additionally destroy the partition table. **Out** (`ceph osd out <id>`). This will exclude it from data
distribution and starts a rebalance.
[source,bash] . Click on **Stop**, if stopping is not safe yet, a warning will
---- appear and you should click on **Cancel**, please try again shortly
pveceph osd destroy <ID> afterwards. When using the shell, check if it is safe to stop by
---- reading the output from `ceph osd ok-to-stop <id>`, once true, run
`pveceph stop --service osd.<id>` .
WARNING: The above command will destroy all data on the disk! . Finally:
+
[WARNING]
To remove the OSD from Ceph and delete all disk data, first click on
**More -> Destroy**. Use the cleanup option to clean up the partition
table and similar, enabling an immediate reuse of the disk in {pve}.
Finally, click on **Remove** (`pveceph osd destroy <id> [--cleanup]`).
[[pve_ceph_pools]] [[pve_ceph_pools]]