Cherry-pick #3204 after it has been inadvertently removed #3979
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During prometheus updates the alert was firing because the metric was initialized with a value of '0' before the first heartbeat was sent. As such, the evaluation of the alert results into actually taking just the value of time() into consideration which led to misleading information about the health of the sidecar. As the thanos_sidecar_last_heartbeat_success_time_seconds metric is effectively just a timestamp that resets on new deployments, we can simply wrap it around the timestamp() function which should return almost the same value of the metric itself with the added benefit that heartbeat resets will be ignored. This also refactors the relevant tests and drops the timeout to 4 minutes in order to ensure that we do not get hit by stale data if the sidecar takes longer to start. Signed-off-by: Markos Chandras <markos@chandras.me> Signed-off-by: Damien Grisonnet <dgrisonn@redhat.com>
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…er healthy (#4342) * Revert "mixin: Use sidecar's metric timestamp for healthcheck (#3204) (#3979)" This reverts commit 5139e33. Signed-off-by: Arunprasad Rajkumar <arajkuma@redhat.com> * fix(mixin): ThanosSidecarUnhealthy doesn't fire if the sidecar is never healthy Signed-off-by: Arunprasad Rajkumar <arajkuma@redhat.com>
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Cherry-pick #3204 after it has been inadvertently removed by #3856.