Andrei Dan 421aa14972
ILM: Make UpdateSettingsStep retryable (#51235) (#51298)
This makes the UpdateSettingsStep retryable. This step updates settings needed
during the execution of ILM actions (mark indexes as read-only, change
allocation configurations, mark indexing complete, etc)

As the index updates are idempotent in nature (PUT requests and are applied only
if the values have changed) and the settings values are seldom user-configurable
(aside from the allocate action) the testing for this change goes along the
lines of artificially simulating a setting update failure on a particular value
update, which is followed by a successful step execution (a retry) in an
environment outside of ILM (the step executions are triggered manually).

(cherry picked from commit 8391b0aba469f39532bfc2796b76148167dc0289)
Signed-off-by: Andrei Dan <andrei.dan@elastic.co>
2020-01-22 11:02:26 +00:00
..