What version of Ceph are you running? It's varied by a bit.
But I think you want to just turn off the MDS and run the "fail"
command — deactivate is actually the command for removing a logical
MDS from the cluster, and you can't do that for a lone MDS because
there's nobody to pass off the data to. I'll make a ticket to clarify
this. When you've done that you should be able to delete it.
-Greg
On Mon, Feb 2, 2015 at 1:40 AM, <warren.je...@stfc.ac.uk> wrote:
> Hi All,
>
>
>
> Having a few problems removing cephfs file systems.
>
>
>
> I want to remove my current pools (was used for test data) – wiping all
> current data, and start a fresh file system on my current cluster.
>
>
>
> I have looked over the documentation but I can’t find anything on this. I
> have an object store pool, Which I don’t want to remove – but I’d like to
> remove the cephfs file system pools and remake them.
>
>
>
>
>
> My cephfs is called ‘data’.
>
>
>
> Running ceph fs delete data returns: Error EINVAL: all MDS daemons must be
> inactive before removing filesystem
>
>
>
> To make an MDS inactive I believe the command is: ceph mds deactivate 0
>
>
>
> Which returns: telling mds.0 135.248.53.134:6809/16692 to deactivate
>
>
>
> Checking the status of the mds using: ceph mds stat returns: e105: 1/1/0 up
> {0=node2=up:stopping}
>
>
>
> This has been sitting at this status for the whole weekend with no change. I
> don’t have any clients connected currently.
>
>
>
> When trying to manually just remove the pools, it’s not allowed as there is
> a cephfs file system on them.
>
>
>
> I’m happy that all of the failsafe’s to stop someone removing a pool are all
> working correctly.
>
>
>
> If this is currently undoable. Is there a way to quickly wipe a cephfs
> filesystem – using RM from a kernel client is really slow.
>
>
>
> Many thanks
>
>
>
> Warren Jeffs
>
>
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>
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