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62 lines
2.5 KiB
Markdown
62 lines
2.5 KiB
Markdown
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## [Prometheus](https://github.com/prometheus/prometheus) and [node_exporter](https://github.com/prometheus/node_exporter)
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Podcheck check is capable to export metrics to prometheus via the text file collector provided by the node_exporter.
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In order to do so the -c flag has to be specified followed by the file path that is configured in the text file collector of the node_exporter.
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A simple cron job can be configured to export these metrics on a regular interval as shown in the sample below:
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```
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0 1 * * * /root/podcheck.sh -n -c /var/lib/node_exporter/textfile_collector
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```
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The following metrics are exported to prometheus
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```
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# HELP podcheck_images_analyzed Podman images that have been analyzed
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# TYPE podcheck_images_analyzed gauge
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podcheck_images_analyzed 22
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# HELP podcheck_images_outdated Podman images that are outdated
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# TYPE podcheck_images_outdated gauge
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podcheck_images_outdated 7
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# HELP podcheck_images_latest Podman images that are outdated
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# TYPE podcheck_images_latest gauge
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podcheck_images_latest 14
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# HELP podcheck_images_error Podman images with analysis errors
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# TYPE podcheck_images_error gauge
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podcheck_images_error 1
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# HELP podcheck_images_analyze_timestamp_seconds Last podcheck run time
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# TYPE podcheck_images_analyze_timestamp_seconds gauge
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podcheck_images_analyze_timestamp_seconds 1737924029
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```
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Once those metrics are exported they can be used to define alarms as shown below
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```
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- alert: podcheck_images_outdated
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expr: sum by(instance) (podcheck_images_outdated) > 0
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for: 15s
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labels:
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severity: warning
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annotations:
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summary: "{{ $labels.instance }} has {{ $value }} outdated podman images."
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description: "{{ $labels.instance }} has {{ $value }} outdated podman images."
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- alert: podcheck_images_error
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expr: sum by(instance) (podcheck_images_error) > 0
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for: 15s
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labels:
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severity: warning
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annotations:
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summary: "{{ $labels.instance }} has {{ $value }} podman images having an error."
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description: "{{ $labels.instance }} has {{ $value }} podman images having an error."
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- alert: podcheck_image_last_analyze
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expr: (time() - podcheck_images_analyze_timestamp_seconds) > (3600 * 24 * 3)
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for: 15s
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labels:
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severity: warning
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annotations:
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summary: "{{ $labels.instance }} has not updated the podcheck statistics for more than 3 days."
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description: "{{ $labels.instance }} has not updated the podcheck statistics for more than 3 days."
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```
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There is a reference Grafana dashboard in [grafana/grafana_dashboard.json](./grafana/grafana_dashboard.json).
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