July 2021 - openstack-discuss - lists.openstack.org

[openstack] [DC-DC Setup] [Replication] Correct approach to a DC-DC setup for Openstack (victoria)
by Swogat Pradhan 30 Jun '21

30 Jun '21

Hi, I am trying to setup a DC-DC setup in openstack victoria, I have 2 numbers of all in one setup (controller, compute) with shared mysql and rabbitmq cluster and am using ceph image replication and configuring cinder replication on top of it. So when the 1st node goes down then i will perform a 'cinder failover-host node1' and then do a nova-evacuate to failover to the 2nd DC setup and once the node 1 comes up i will use cinder failback and live migration from node2 to node1. **i am facing some minor issues in this setup which I will ask once I know this is the right approach to the DC-DC concept. Can you please shed some light on this being the right approach or not and if not then how can i improve it? With regards Swogat pradhan

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[all][tc] Technical Committee next weekly meeting on July 1st at 1500 UTC
by Ghanshyam Mann 30 Jun '21

30 Jun '21

Hello Everyone, Technical Committee's next weekly meeting is scheduled for July 1st at 1500 UTC. If you would like to add topics for discussion, please add them to the below wiki page by Wednesday, June 30th, at 2100 UTC. https://wiki.openstack.org/wiki/Meetings/TechnicalCommittee#Next_Meeting -gmann

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[Swift] Object replication failures on newly upgraded servers
by Mark Kirkwood 30 Jun '21

30 Jun '21

HI, I'm in the process of upgrading a Swift cluster from 2.7/Mitaka to 2.23/Train. While in general it seems to be going well, I'm noticing non-zero object replication failures on the upgraded nodes only, e.g: $ curl http://localhost:6000/recon/replication/object {"replication_last": 1622156911.019487, "replication_stats": {"rsync": 40580, "success": 4141229, "attempted": 2081856, "remove": 4083, "suffix_count": 14960481, "failure": 26550, "hashmatch": 4127197, "failure_nodes": {"10.11.18.67": {"obj08": 2348, "obj09": 60, "obj10": 3030, "obj02": 34, "obj03": 25, "obj01": 44, "obj06": 1498, "obj07": 28, "obj04": 69, "obj05": 36}, "10.11.18.68": {"obj03": 6901, "obj01": 293, "obj06": 1901, "obj04": 10281, "obj10": 1}, "10.12.18.76": {"obj10": 1}}, "suffix_sync": 1785, "suffix_hash": 2778}, "object_replication_last": 1622156911.019487, "replication_time": 1094.7836411476135, "object_replication_time": 1094.7836411476135} Examining the logs (/var/log/swift/object.log and /var/log/syslog) these are not throwing up any red flags (i.e no failing rsyncs noted). Any suggesting about how to get more information about what went wrong e.g: "10.11.18.67": {"obj08": 2348}, how to find what those 2348 errors were? regards Mark P.s: basic sanity checking is ok - uploaded objects go where they should and can be retrieved for 2.7 or 2.23 servers ok (the old and new version servers agree about object placement)

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