Change Details

Maintenance script to manage (production) ES config, like: * set analyzers (= how ES indexes columns internally, so it knows how to interpret which datatypes, e.g. stem words, …) * validate/fix cache warmers, shard allocation, number of shards, replica range, amount of shards per node, index aliases * force reindex data https://gerrit.wikimedia.org/r/#/c/161251/ All of that was in Cirrus already, but not extendable. See T78786 for that. Above patch is Flow-specific, re-using refactored (now extendable) pieces from Cirrus.