I'm assuming you've looked at the period in both places `radosgw-admin period get` and confirmed that the second site is behind the master site (based on epochs). I'm also assuming (since you linked the instructions) that you've done `radosgw-admin period pull` on the second site to get any period updates that have been done to the master site.
If my assumptions are wrong. Then you should do those things. If my assumptions are correct, then running `radosgw-admin period update --commit` on the the master site and `radosgw-admin period pull` on the second site might fix this. If you've already done that as well (as they're steps in the article you linked), then you need someone smarter than I am to chime in.
On Tue, Nov 14, 2017 at 11:35 AM Kim-Norman Sahm <kisahm@xxxxxxxxxxx> wrote:
hi,
i've installed a ceph multi site setup with two ceph clusters and each
one radosgw.
the multi site setup was in sync, so i tried a failover.
cluster A is going down and i've changed the zone (b) on cluster b to
the new master zone.
it's working fine.
now i start the cluster A and try to switch back the master zone to A.
cluster A believes that he is the master, cluster b is secondary.
but on the secondary is a different period and the bucket delta is not
synced to the new master zone:
root@ceph-a-1:~# radosgw-admin sync status
realm 833e65be-268f-42c2-8f3c-9bab83ebbff2 (myrealm)
zonegroup 15550dc6-a761-473f-81e8-0dc6cc5106bd (ceph)
zone 51019cee-86fb-4b39-b6ba-282171c459c6 (a)
metadata sync no sync (zone is master)
data sync source: 082cd970-bd25-4cbc-a5fd-20f3b3f9dbd2 (b)
syncing
full sync: 0/128 shards
incremental sync: 128/128 shards
data is caught up with source
root@ceph-b-1:~# radosgw-admin sync status
realm 833e65be-268f-42c2-8f3c-9bab83ebbff2 (myrealm)
zonegroup 15550dc6-a761-473f-81e8-0dc6cc5106bd (ceph)
zone 082cd970-bd25-4cbc-a5fd-20f3b3f9dbd2 (b)
metadata sync syncing
full sync: 0/64 shards
master is on a different period:
master_period=b7392c41-9cbe-4d92-ad03-db607dd7d569
local_period=d306a847-77a6-4306-87c9-0bb4fa16cdc4
incremental sync: 64/64 shards
metadata is caught up with master
data sync source: 51019cee-86fb-4b39-b6ba-282171c459c6 (a)
syncing
full sync: 0/128 shards
incremental sync: 128/128 shards
data is caught up with source
how can i force sync the period and the bucket deltas?
i've used this howto: http://docs.ceph.com/docs/master/radosgw/multisit
e/
br Kim
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