Ceph » CephFS

From: https://github.com/rook/rook/issues/1027

2017-09-29 21:55:06.978169 I | rook-ceph-mon0:      0> 2017-09-29 21:55:06.961413 7f55aba29700 -1 /build/ceph/src/mds/FSMap.cc: In function 'void FSMap::assign_standby_replay(mds_gid_t, fs_cluster_id_t, mds_rank_t)' thread 7f55aba29700 time 2017-09-29 21:55:06.957486
2017-09-29 21:55:06.978179 I | rook-ceph-mon0: /build/ceph/src/mds/FSMap.cc: 870: FAILED assert(mds_roles.at(standby_gid) == FS_CLUSTER_ID_NONE)

It would appear there is an issue with the standby being assigned by the mon after adding a third filesystem. The configuration of the file systems in the cluster was:

    myfs: two mds active, two mds on standby-replay
    yourfs: three mds active, three mds on standby
    jaredsfs: one mds active, one mds on standby-replay

After the first two were created, ceph status showed the following mds status:

 mds: myfs-2/2/2 up yourfs-3/3/3 up  {[myfs:0]=msdfdx=up:active,[myfs:1]=m88104=up:active,[yourfs:0]=m739m0=up:active,[yourfs:1]=mdv8k2=up:active,[yourfs:2]=m6ktsw=up:active}, 2 up:standby-replay, 3 up:standby