This tests a fuse-only feature, ticket for adding
it in kclient is:
http://tracker.ceph.com/issues/17805
Signed-off-by: John Spray <john.spray@redhat.com>
Change the Mount interface to take it as an
argument to mount() instead of setting it
out of band in a config file as we used to
for the fuse client.
Signed-off-by: John Spray <john.spray@redhat.com>
This commit amends the MDS thrasher task to also work on multimds
clusters. Main changes:
o New FSStatus class in tasks/cephfs/filesystem.py which gets a snapshot
of the fsmap (`ceph fs dump`). This allows consecutive operations on
the same fsmap without repeated fs dumps.
o Only one MDSThrasher is started for each file system.
o The MDSThrasher operates on ranks instead of names (and groups of
standbys following the initial active).
o The MDSThrasher also will change the max_mds for the cluster to a new
value [1, current) or (current, starting max_mds]. When reduced,
randomly selected MDSs other than rank 0 will be deactivated to reach
the new max_mds. The likelihood of changing max_mds in a given cycle of
the MDSThrasher is set by the "thrash_max_mds" config.
o The MDSThrasher prints out stats on completion, e.g. number of
mds deactivated or mds_max changed.
Pre-requisite for: http://tracker.ceph.com/issues/10792
Partially fixes: http://tracker.ceph.com/issues/15134
Signed-off-by: Patrick Donnelly <pdonnell@redhat.com>
Even though check_subs was broken, the multiclient
test was still passing because it didn't test that
clients survived a failover in the multi-filesystem
case.
Fixes: http://tracker.ceph.com/issues/16022
Signed-off-by: John Spray <john.spray@redhat.com>
For the case where we have a daemon come up that
wants to be a standby replay, but someone else
is already following the target, so he has to
be just a regular standy instead.
Signed-off-by: John Spray <john.spray@redhat.com>
Previously, an MDS could be used as a replay even
if it had "standby replay = false", this is changed
now so that replays will only happen explicitly.
Signed-off-by: John Spray <john.spray@redhat.com>
Move the thrasher-specific methods out of CephManager
into MDSThrasher and plumb them into MDSCluster.
Signed-off-by: John Spray <john.spray@redhat.com
A quick check that clients refuse to mount
when daemons are laggy, and while we're at it,
that the basics of failover work. It's a trivial
test, but it's nice to have this kind of thing
so that we don't have to wait for weird thrasher
failures if something breaks.
Signed-off-by: John Spray <john.spray@redhat.com>
