hello
in a cluster running octopus, i've set the upmap balancer; in order to
do so i had to set the set-require-min-compat-client flag to luminous
however i can still mount my cephfs exports using old kernels (3.10.0-1160.el7)
and more surprisingly clients appear in ceph features as jewel clients
$ ceph osd get-require-min-compat-client
luminous
$ ceph features
...
"features": "0x27018fb86aa42ada",
"release": "jewel",
"num": 1
how is this possible? shouldn't the mount request fail if the
min-compat-client is not satisfied?
the client can use the fs just fine, the balancer hasn't been active
yet since the cluster is still remapping pgs from previous manual
changes (skips because too many objects displaced) Would that cause the
issue? will the old client break when the upmap balancer runs?
PS: i cannot set the min-compat-client to luminous if old clients are
connected
thanks
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