Your submission was sent successfully! Close

You have successfully unsubscribed! Close

Thank you for signing up for our newsletter!
In these regular emails you will find the latest updates about Ubuntu and upcoming events where you can meet our team.Close

Scaling down multi-site to single-site

Scaling down a RADOS Gateway multi-site replication back to single site is performed by removing the multi-site relation. Post scale-down, both sites (primary and secondary) split identically with their local zones configured as the master zones. Further, subsequent writes will not be synchronised across sites after scale-down.

To remove the multi-site relation:

juju remove-relation ceph-radosgw:primary secondary-ceph-radosgw:secondary

Post scale-down, sync status (Realm and Zonegroup configs are preserved but local zone is promoted to master zone):

The command to query sync status is as follows:

sudo radosgw-admin --id=rgw.$(hostname -s) sync status

Sample output looks like:

[Primary Site]
          realm 3a7acb0c-c7a3-4b74-8d52-43a330c7a9f0 (replicated)
      zonegroup 170a884a-6610-40f8-aec8-24117aa7f088 (us)
           zone 77218517-8bf7-4c29-af0e-bb5312861cf8 (us-east)
  metadata sync no sync (zone is master)

And

[Secondary Site]
          realm 3a7acb0c-c7a3-4b74-8d52-43a330c7a9f0 (replicated)
      zonegroup 170a884a-6610-40f8-aec8-24117aa7f088 (us)
           zone aac90d5a-f4ac-4dd7-acbe-61879b7ea4b8 (us-west)
  metadata sync no sync (zone is master)

This page was last modified 1 year, 3 months ago. Help improve this document in the forum.