[pve-devel] [PATCH docs v2 1/1] pveceph: improve documentation for destroying cephfs

Aaron Lauterer a.lauterer at proxmox.com
Wed Oct 27 12:15:59 CEST 2021


a few small things inline

On 10/25/21 16:01, Dominik Csapak wrote:
> Signed-off-by: Dominik Csapak <d.csapak at proxmox.com>
> ---
>   pveceph.adoc | 49 +++++++++++++++++++++++++++++++++++++------------
>   1 file changed, 37 insertions(+), 12 deletions(-)
> 
> diff --git a/pveceph.adoc b/pveceph.adoc
> index aa7a20f..cceb1ca 100644
> --- a/pveceph.adoc
> +++ b/pveceph.adoc
> @@ -809,28 +809,53 @@ Destroy CephFS
>   WARNING: Destroying a CephFS will render all of its data unusable. This cannot be
>   undone!
>   
> -If you really want to destroy an existing CephFS, you first need to stop or
> -destroy all metadata servers (`M̀DS`). You can destroy them either via the web
> -interface or via the command line interface, by issuing
> +To completely an cleanly remove a CephFS, the following steps are necessary:
s/an/and/
>   
> +* Disconnect every non-{PVE} client (e.g. unmount the CephFS in guests).
> +* Disable all related CephFS {PVE} storage entries (to prevent it from being
> +  automatically mounted).
> +* Remove all used resources from guests (e.g. ISOs) that are on the CephFS you
> +  want to destroy.
> +* Unmount the CephFS storages on all cluster nodes manually with
> ++
>   ----
> -pveceph mds destroy NAME
> +umount /mnt/pve/<STORAGE-NAME>
>   ----
> -on each {pve} node hosting an MDS daemon.
> -
> -Then, you can remove (destroy) the CephFS by issuing
> ++
> +Where `<STORAGE-NAME>` is the name of the CephFS storage in your {PVE}.
>   
> +* Now make sure that no metadata server (`MDS`) is running for that CephFS,
> +  either by stopping or destroying them. This can be done either via the web
s/either via/via/

to avoid close repetition of `either`
> +  interface or via the command line interface, by issuing:
> ++
> +----
> +pveceph stop --service mds.NAME
>   ----
> -ceph fs rm NAME --yes-i-really-mean-it
> ++
> +to stop them, or
> ++
> +----
> +pveceph mds destroy NAME
>   ----
> -on a single node hosting Ceph. After this, you may want to remove the created
> -data and metadata pools, this can be done either over the Web GUI or the CLI
> -with:
> ++
> +to destroy them.
> ++
> +Note that standby servers will automatically be promoted to active when an
> +active `MDS` is stopped or removed, so it is best to first stop all standby
> +servers.
>   
> +* Now you can destroy the CephFS with
> ++
>   ----
> -pveceph pool destroy NAME
> +pveceph fs destroy NAME --remove-storages --remove-pools
>   ----
> ++
> +This will automatically destroy the underlying ceph pools as well as remove
> +the storages from pve config.
>   
> +After these steps, the CephFS should be completely removed and if you have> +other CephFS instances, the stopped metadata servers can be started again
> +to act as standbys.
>   
>   Ceph maintenance
>   ----------------
> 




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