On Wed, Jan 22, 2020 at 8:58 AM Yoann Moulin <yoann.moulin@xxxxxxx> wrote:
>
> Hello,
>
> On a fresh install (Nautilus 14.2.6) deploy with ceph-ansible playbook stable-4.0, I have an issue with cephfs. I can create a folder, I can
> create empty files, but cannot write data on like I'm not allowed to write to the cephfs_data pool.
>
> > $ ceph -s
> > cluster:
> > id: fded5bb5-62c5-4a88-b62c-0986d7c7ac09
> > health: HEALTH_OK
> >
> > services:
> > mon: 3 daemons, quorum iccluster039,iccluster041,iccluster042 (age 23h)
> > mgr: iccluster039(active, since 21h), standbys: iccluster041, iccluster042
> > mds: cephfs:3 {0=iccluster043=up:active,1=iccluster041=up:active,2=iccluster042=up:active}
> > osd: 24 osds: 24 up (since 22h), 24 in (since 22h)
> > rgw: 1 daemon active (iccluster043.rgw0)
> >
> > data:
> > pools: 9 pools, 568 pgs
> > objects: 800 objects, 225 KiB
> > usage: 24 GiB used, 87 TiB / 87 TiB avail
> > pgs: 568 active+clean
>
> The 2 cephfs pools:
>
> > $ ceph osd pool ls detail | grep cephfs
> > pool 1 'cephfs_data' replicated size 3 min_size 2 crush_rule 0 object_hash rjenkins pg_num 256 pgp_num 256 autoscale_mode warn last_change 83 lfor 0/0/81 flags hashpspool stripe_width 0 expected_num_objects 1 application cephfs
> > pool 2 'cephfs_metadata' replicated size 3 min_size 2 crush_rule 0 object_hash rjenkins pg_num 8 pgp_num 8 autoscale_mode warn last_change 48 flags hashpspool stripe_width 0 expected_num_objects 1 pg_autoscale_bias 4 pg_num_min 16 recovery_priority 5 application cephfs
>
> The status of the cephfs filesystem:
>
> > $ ceph fs status
> > cephfs - 1 clients
> > ======
> > +------+--------+--------------+---------------+-------+-------+
> > | Rank | State | MDS | Activity | dns | inos |
> > +------+--------+--------------+---------------+-------+-------+
> > | 0 | active | iccluster043 | Reqs: 0 /s | 34 | 18 |
> > | 1 | active | iccluster041 | Reqs: 0 /s | 12 | 16 |
> > | 2 | active | iccluster042 | Reqs: 0 /s | 10 | 13 |
> > +------+--------+--------------+---------------+-------+-------+
> > +-----------------+----------+-------+-------+
> > | Pool | type | used | avail |
> > +-----------------+----------+-------+-------+
> > | cephfs_metadata | metadata | 4608k | 27.6T |
> > | cephfs_data | data | 0 | 27.6T |
> > +-----------------+----------+-------+-------+
> > +-------------+
> > | Standby MDS |
> > +-------------+
> > +-------------+
> > MDS version: ceph version 14.2.6 (f0aa067ac7a02ee46ea48aa26c6e298b5ea272e9) nautilus (stable)
>
>
> > # mkdir folder
> > # echo "foo" > bar
> > -bash: echo: write error: Operation not permitted
> > # ls -al
> > total 4
> > drwxrwxrwx 1 root root 2 Jan 22 07:30 .
> > drwxr-xr-x 28 root root 4096 Jan 21 09:25 ..
> > -rw-r--r-- 1 root root 0 Jan 22 07:30 bar
> > drwxrwxrwx 1 root root 1 Jan 21 16:49 folder
>
> > # df -hT .
> > Filesystem Type Size Used Avail Use% Mounted on
> > 10.90.38.15,10.90.38.17,10.90.38.18:/dslab2020 ceph 28T 0 28T 0% /cephfs
>
> I try 2 client config :
>
> > $ ceph --cluster dslab2020 fs authorize cephfs client.cephfsadmin / rw
> > [snip]
> > $ ceph auth get client.fsadmin
> > exported keyring for client.fsadmin
> > [client.fsadmin]
> > key = [snip]
> > caps mds = "allow rw"
> > caps mon = "allow r"
> > caps osd = "allow rw tag cephfs data=cephfs"
For "allow rw tag cephfs data=cephfs" to work, having your pools tagged
with cephfs is not enough. There should be a key-value pair in the tag
metadata with the name of the filesystem as well. What is the output
of:
ceph osd pool ls detail --format=json | jq '.[] | select(.pool_name
| startswith("cephfs")) | .pool_name, .application_metadata'
Thanks,
Ilya
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