[v23.3.x] Refined leadership changed metrics #19892
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Previously the leadership changed metric was incremented every time a group leader was updated with the new leader or the leader was currently unknown. Technically the change from leader to no leader is a leadership change but it was confusing to users. Change the metric updates to only account the changes when leader is present. This way after each successful leader election the metric is incremented by one on all partition replicas. Signed-off-by: Michał Maślanka <michal@redpanda.com> (cherry picked from commit 5bee838)
Signed-off-by: Michał Maślanka <michal@redpanda.com> (cherry picked from commit 501eaed)
mmaslankaprv
approved these changes
Jun 20, 2024
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Backport of PR #19873