Commits on Aug 12, 2020

1. mixin: Fix alert about unhealthy sidecar …

   The alert was giving the wrong information as the $value contained
   the number of pods that failing to send heartbeat instead of the actual
   number of seconds that each sidecar was being unhealthy.
   
   Also the 5 minute interval is probably too low as on large deployments
   prometheus could take much longer to come up online and for sidecar to
   become actually useful.
   
   As such, we can simply subtract the timestamp of the last heartbeat from
   the current time and fire if we are lagging for more than 10 minutes.
   
   Signed-off-by: Markos Chandras <markos@chandras.me>

   

   hwoarang committed Aug 12, 2020
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