[MXS-1867] Allow GaleraMon to use a standalone slave as backup when entire cluster is down Created: 2018-05-14  Updated: 2022-06-05  Resolved: 2019-06-26

Status: Closed
Project: MariaDB MaxScale
Component/s: galeramon
Affects Version/s: None
Fix Version/s: Icebox

Type: New Feature Priority: Minor
Reporter: Geoff Montee (Inactive) Assignee: Todd Stoffel (Inactive)
Resolution: Won't Do Votes: 0
Labels: galeramon, slave

Issue Links:
Relates
relates to MXS-2123 Please add support for hybrid galera ... Closed
relates to MXS-2441 Add support for read-only slaves to g... Closed

 Description   

Some users would like GaleraMon to allow them to configure a standalone replication slave as a backup option that would only be used when the entire cluster is down or non-primary. That way, MaxScale can still route application traffic to the standalone slave when the cluster is unavailable.

 Comments   
Comment by Johan Wikman [ 2019-05-13 ]

Assuming that possiblity would be available, what should happen when the cluster comes back up. At that point the standalone slave will presumably contain data that the cluster does not have.

Comment by Geoff Montee (Inactive) [ 2019-06-26 ]

johan.wikman, markus makela, and toddstoffel,

Is this already implemented in MaxScale 2.4 as part of MXS-2441?

Comment by markus makela [ 2019-06-26 ]

MXS-2441 only implements read scaleout via read replicas. A valid joined node is required for the replicating server to be labeled a slave in MaxScale.

Comment by Geoff Montee (Inactive) [ 2019-06-26 ]

Ah, OK. Thanks!

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