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relocate-replicas: sanity check to avoid invalid circular replication #839

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merged 2 commits into from
Mar 13, 2019
Merged

relocate-replicas: sanity check to avoid invalid circular replication #839

merged 2 commits into from
Mar 13, 2019

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shlomi-noach
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Fixes #838

The specific relocate-replicas command (e.g. relocate-replicas -i srv1 -d srv2) will pre-verify that none of the replicas of instance srv1 is an ancestor of srv2.

The check is based on ancestry_uuid which is based on the server_uuid variable, which is available 5.6 and onwards.

@shlomi-noach shlomi-noach temporarily deployed to production/mysql_cluster=concertmaster March 13, 2019 03:36 Inactive
@shlomi-noach
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Deploys and works well. cc @tomkrouper

@shlomi-noach
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The fix applies to the relocate command, too.

@shlomi-noach shlomi-noach temporarily deployed to production/mysql_cluster=concertmaster March 13, 2019 19:46 Inactive
@shlomi-noach shlomi-noach merged commit 760bf40 into master Mar 13, 2019
@shlomi-noach shlomi-noach deleted the relocate-replicas-sanity-check branch March 13, 2019 19:53
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