Try to find the right way to enable rbd-mirror.

[Mika c <mika.leaf666@xxxxxxxxx>]

Hi cephers,

    I am wondering someone that familiar with function of  rbd-mirror can give me some hints.

There were 2 clusters site1 and site2. Both sites deployed by command ceph-deploy.

And there are the steps of my test. With Ubuntu 14.04(kernel 3.19).

1.) On site1 ： Copy ceph.conf and ceph.client.admin.keyring to "local.conf" "local.client.admin.keyring"

​2.) On site2：​ Copy ceph.conf and ceph.client.admin.keyring to "remote.conf" "remote.client.admin.keyring"

​3.) Copy these files to each sites.​

     Boths site used command "ceph -s --cluster=local" (or remote) can get result successfully.

    

4.) Both sites  installed "rbd-mirror".
     Start daemon "rbd-mirror" .

     On site1：$sudo rbd-mirror -m 192.168.168.21:6789
     On site2：$sudo rbd-mirror -m 192.168.168.22:6789

5.) Enable mirror mode "pool" of pool "rbd".

​    $rbd --cluster local mirror pool enable rbd pool
    $rbd --cluster remote mirror pool enable rbd pool​

6.)Peer setting：
    $rbd --cluster local mirror pool peer add rbd client.admin@remote
    $rbd --cluster remote mirror pool peer add rbd client.admin@local

Finally, I think I can create a rbd image and wait it sync to other site.

But nothing happed. And the log seems no error, only 2 messages.

---rbd mirror log-------

2016-05-12 09:48:23.348333 7fd6e5b65c80  0 ceph version 10.2.0 (3a9fba20ec743699b69bd0181dd6c54dc01c64b9), process rbd-mirror, pid 11921
2016-05-12 09:48:23.349093 7fd6e5b65c80  0 pidfile_write: ignore empty --pid-file

What I missing? All suggestions are welcome

Best wishes,
Mika
 

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