On 06/25/2015 04:17 PM, Ilya Dryomov wrote:
> On Thu, Jun 25, 2015 at 5:11 PM, Jan Safranek <jsafrane@xxxxxxxxxx> wrote:
>> I need to map an existing RBD into a docker container. I'm running
>> Fedora 21 both as the host and inside the container (i.e. the kernel
>> matches ceph user space tools) and I get this error:
>>
>> $ rbd map foo
>> rbd: add failed: (22) Invalid argument
>>
>> $ strace rbd map foo
>> ...
>> stat("/sys/bus/rbd", {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0
>> open("/sys/bus/rbd/add_single_major", O_WRONLY) = 3
>> write(3, "172.17.0.11:6789 name=admin,key=client.admin rbd foo", 52) =
>> -1 EINVAL (Invalid argument)
>>
>> Any idea what can be wrong? Note that I run ceph server in a container
>> too, but I guess it should not matter. I can map the same volume outside
>> of the container with the same settings without any problems.
>
> Network namespaces, I think. ceph kernel client currently requires
> init_ns namespace, which means you need to pass --net=host (or whatever
> it is) to docker.
docker --net=host did the trick, thanks!
Jan
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