Hello,
on a ceph Nautilus cluster (14.2.1) running on Ubuntu 18.04 I try to set
up rbd images with namespaces in order to allow different clients to
access only their "own" rbd images in different namespaces in just one
pool. The rbd image data are in an erasure encoded pool named "ecpool"
and the metadata in the default "rbd" pool.
With this setup I am experiencing trouble when I try to access a rbd
image in a namespace from a (OpenSuSE Leap 15.0 with Ceph 14.2.1) client
and I do not understand what I am doing wrong. Hope someone can see the
problem and give me a hint:
# On one of the the ceph servers
$ rbd namespace create --namespace testnamespace
$ rbd namespace ls
NAME
testnamespace
$ ceph auth caps client.rainer mon 'profile rbd' osd 'profile rbd
pool=rbd namespace=testnamespace'
$ ceph auth get client.rainer
[client.rainer]
key = AQCcVt5cHC+WJhBBoRPKhErEYzxGuU8U/GA0xA++
caps mon = "profile rbd"
caps osd = "profile rbd pool=rbd namespace=testnamespace"
$ rbd create rbd/rbdtestns --namespace testnamespace --size 50G
--data-pool=rbd-ecpool
$ rbd --namespace testnamespace ls -l
NAME SIZE PARENT FMT PROT LOCK
rbdtestns 50 GiB 2
On the openSuSE Client:
$ rbd --namespace=testnamespace map rbd/rbdtestns --name client.rainer
--keyring=/etc/ceph/ceph.keyring
rbd: sysfs write failed
rbd: error opening image rbdtestns: (1) Operation not permitted
In some cases useful info is found in syslog - try "dmesg | tail".
2019-05-20 08:18:29.187 7f42ab7fe700 -1 librbd::image::RefreshRequest:
failed to retrieve pool metadata: (1) Operation not permitted
2019-05-20 08:18:29.187 7f42aaffd700 -1 librbd::image::OpenRequest:
failed to refresh image: (1) Operation not permitted
2019-05-20 08:18:29.187 7f42aaffd700 -1 librbd::ImageState:
0x561792408860 failed to open image: (1) Operation not permitted
rbd: map failed: (22) Invalid argument
Thanks for your help
Rainer
--
Rainer Krienke, Uni Koblenz, Rechenzentrum, A22, Universitaetsstrasse 1
56070 Koblenz, Tel: +49261287 1312 Fax +49261287 100 1312
Web: http://userpages.uni-koblenz.de/~krienke
PGP: http://userpages.uni-koblenz.de/~krienke/mypgp.html
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