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Replace ReadOnlyRootFilesystem alert #49

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merged 2 commits into from
Oct 13, 2023
Merged

Replace ReadOnlyRootFilesystem alert #49

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848e6d6
Replace ReadOnlyRootFilesystem alert
hectorhuertas Oct 11, 2023
f39e8e4
Provide link to node-exporter logs
hectorhuertas Oct 13, 2023
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11 changes: 8 additions & 3 deletions common/all.yaml.tmpl
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Original file line number Diff line number Diff line change
Expand Up @@ -160,13 +160,18 @@ groups:
impact: "{{ $labels.namespace }}/{{ $labels.pod }} might take longer than normal to respond to requests."
action: "Investigate CPU consumption and adjust pods resources if needed."
dashboard: "https://grafana.$ENVIRONMENT.$PROVIDER.uw.systems/d/VAE0wIcik/kubernetes-pod-resources?orgId=1&refresh=1m&from=now-12h&to=now&var-instance=All&var-namespace={{ $labels.namespace }}"
- alert: ReadOnlyRootFilesystem
expr: ro_rootfs != 0
# Non-kube targets have their own dedicated alerts
- alert: NodeExporterDown(kube)
# Joining with kube_pod_info to get the pod name of the exporter, to enable the loki link
expr: up{job="node-exporter", node!=""} * on (node) group_left(pod) kube_pod_info{created_by_name="node-exporter"} == 0
for: 5m
labels:
team: infra
annotations:
summary: "{{ $labels.instance }} instance has a read only root filesystem for 5m"
summary: "{{ $labels.node }} prometheus scrapes are failing on a discovered node"
impact: "Node may be misbehaving"
action: "Check if node has a read-only filesystem, which is a common cause for exporter failures (check events in `kubectl describe node`). Otherwise check node-exporter logs (link below)"
logs: "https://grafana.${ENVIRONMENT}.aws.uw.systems/explore?orgId=1&left=%7B%22datasource%22%3A%22loki%22%2C%22queries%22%3A%5B%7B%22refId%22%3A%22A%22%2C%22expr%22%3A%22%7Bcloud_provider%3D%5C%22{{$labels.cloud_provider}}%5C%22%2Ckubernetes_pod_name%3D%5C%22{{$labels.pod}}%5C%22%7D%22%2C%22queryType%22%3A%22range%22%2C%22datasource%22%3A%7B%22type%22%3A%22loki%22%2C%22uid%22%3A%22loki%22%7D%2C%22editorMode%22%3A%22code%22%7D%5D%2C%22range%22%3A%7B%22from%22%3A%22now-1h%22%2C%22to%22%3A%22now%22%7D%7D"
- alert: CfsslDown
expr: probe_success{job="cfssl-probe"} == 0 or absent(probe_success{job="cfssl-probe"})
for: 10m
Expand Down