etcd peer discovery fixes (backport #11439) #11445
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Instead of relying on the complex and non-determinstic default node selection mechanism inside peer discovery this change makes the etcd backend implemention make the leader selection itself based on the etcd create_revision of each entry. Although not spelled out anywhere explicitly is likely that a property called "Create Revision" is going to remain consistent throughout the lifetime of the etcd key. Either way this is likely to be an improvement on the current approach. (cherry picked from commit 3390fc9)
As the primary mirror may sometimes fail there is now a fall back. (cherry picked from commit 5a94049)
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Instead of relying on the complex and non-determinstic default node
selection mechanism inside peer discovery this change makes the
etcd backend implemention make the leader selection itself based on
the etcd
create_revisionof each entry. Although not spelled out anywhereexplicitly is likely that a property called "Create Revision" is going
to remain consistent throughout the lifetime of the etcd key.
Either way this is likely to be an improvement on the current approach.
This is an automatic backport of pull request #11439 done by Mergify.