Assign follower primary to nodes with remote cluster client role #59489
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…stic#59375) The primary shards of follower indices during the bootstrap need to be on nodes with the remote cluster client role as those nodes reach out to the corresponding leader shards on the remote cluster to copy Lucene segment files and renew the retention leases. This commit introduces a new allocation decider that ensures bootstrapping follower primaries are allocated to nodes with the remote cluster client role. Relates elastic#54146 Relates elastic#53924 Closes elastic#58534 Co-authored-by: Jason Tedor <jason@tedor.me>
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The primary shards of follower indices during the bootstrap need to be
on nodes with the remote cluster client role as those nodes reach out to
the corresponding leader shards on the remote cluster to copy Lucene
segment files and renew the retention leases. This commit introduces a
new allocation decider that ensures bootstrapping follower primaries are
allocated to nodes with the remote cluster client role.
Backport of #59375
Co-authored-by: Jason Tedor jason@tedor.me