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add alert for sd refresh failure (#12410) 

* add alert for sd refresh failure

Due to config error or sd service down, prometheus may fail to refresh sd resource, which may lead to scrape fail or irrelavant metrics.

Signed-off-by: Leo Q <LeoQuote@users.noreply.github.com>

* apply suggestions

Signed-off-by: Leo Q <LeoQuote@users.noreply.github.com>

---------

Signed-off-by: Leo Q <LeoQuote@users.noreply.github.com>
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Leo Q 2023-06-07 20:28:13 +08:00 committed by GitHub
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14
documentation/prometheus-mixin/alerts.libsonnet
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@ -20,6 +20,20 @@
description: 'Prometheus %(prometheusName)s has failed to reload its configuration.' % $._config,
},
},
{
alert: 'PrometheusSDRefreshFailure',
expr: |||
increase(prometheus_sd_refresh_failures_total{%(prometheusSelector)s}[10m]) > 0
||| % $._config,
'for': '20m',
labels: {
severity: 'warning',
},
annotations: {
summary: 'Failed Prometheus SD refresh.',
description: 'Prometheus %(prometheusName)s has failed to refresh SD with mechanism {{$labels.mechanism}}.' % $._config,
},
},
{
alert: 'PrometheusNotificationQueueRunningFull',
expr: |||