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| − | [[wikipedia:Prometheus (software)|Prometheus]] is an open-source systems [[monitoring]] and [[alerting]] toolkit <ref>https://prometheus.io/docs/introduction/overview/</ref> released in [[2012]]. Prometheus design is focused to [[collect]] and process metrics, not as an event logging system for [[Prometheus logs|logs]].<ref>https://prometheus.io/docs/introduction/faq/#how-to-feed-logs-into-prometheus?</ref>. [[Grafana]] is usually used to produce [[dashboards]].
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| − | * https://prometheus.io/
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| − | == [[Prometheus Installation]]==
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| − | * http://localhost:9090
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| − | * [[Node exporter]]: [[curl -sSL http://localhost:9100/metrics]]
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| − | [[Kubernetes]]
| + | * [[Prometheus exporters]] |
| − | * <code>[[helm repo add prometheus-community https://prometheus-community.github.io/helm-charts]]</code>
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| − | * <code>[[helm install myprometheus prometheus-community/prometheus]]</code>
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| − | | |
| − | == Configuration files ==
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| − | * Linux: <code>[[/etc/prometheus/prometheus.yml]]</code>
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| − | * macOS: <code>[[/usr/local/etc/prometheus.args]]</code>
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| − | * [[Prometheus storage]]: <code>[[/var/lib/prometheus/]]</code> | |
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| − | == Binaries ==
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| − | * <code>[[prometheus]]</code>
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| − | * <code>[[promtool]]</code>
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| − | * <code>[[tsdb]]</code>
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| − | | |
| − | == Alternatives ==
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| − | * [[Thanos]]
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| − | * [[VictoriaMetrics]]
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| − | * [[Grafana Mimir]] (Mar 2022)
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| − | | |
| − | == Configuration ==
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| − | * Configuration file: <code>[[/etc/prometheus/prometheus.yml]]</code>
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| − | | |
| − | * In the '''global''' settings, define the default interval for scraping metrics. Note that Prometheus will apply these settings to every exporter unless an individual exporter's own settings override the global.
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| − | * This '''[[scrape_interval]]''' value tells Prometheus to collect metrics from its exporters every 15 seconds, which is long enough for most exporters. Now, add Prometheus itself to the list of exporters to scrape from with the following s'''crape_configs''' directive:
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| − | * Prometheus uses the '''job_name''' to label exporters in queries and on graphs, so be sure to pick something descriptive here. And, as Prometheus exports important data about itself that you can use for monitoring performance and debugging, we've overridden the global '''scrape_interval''' directive from 15 seconds to 5 seconds for more frequent updates. Lastly, Prometheus uses the '''static_configs''' and '''targets''' directives to determine where exporters are running. Since this particular exporter is running on the same server as Prometheus itself, we can use localhost instead of an IP address along with the default port, '''[[9090]]'''.
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| − | Your configuration file should now look like this:
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| − | <pre>
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| − | global:
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| − | scrape_interval: 15s
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| − | scrape_configs:
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| − | - job_name: 'prometheus'
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| − | scrape_interval: 5s
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| − | static_configs:
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| − | - targets: ['localhost:9090']
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| − | </pre>
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| − | | |
| − | == Linux Basic Prometheus Operations ==
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| − | * '''Start''' Prometheus: :<code>[[sudo systemctl start prometheus]]</code>
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| − | * '''Reload''' systemd: :<code>[[sudo systemctl daemon-reload prometheus]]</code>
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| − | * '''Verify''' the service's status: :<code>sudo [[systemctl status prometheus]]</code>
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| − | * Delete all data:
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| − | Enable <code>--web.enable-admin-api</code> and execute:
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| − | :: http://prometheus.domain.com:9090/api/v2/admin/tsdb/delete_series
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| − | :: http://prometheus.domain.com:9090/api/v2/admin/tsdb/clean_tombstones
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| − | ==Activities==
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| − | # [[/How To Install Prometheus in Linux/|Install Prometheus in Linux]], [[/Run Prometheus in Linux/]] and connect to graphical interface http://localhost:9090/graph
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| − | # Read [[Prometheus changelog]]: https://github.com/prometheus/prometheus/blob/master/CHANGELOG.md
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| − | # Read Stackoverflow prometheus questions: https://stackoverflow.com/questions/tagged/prometheus?tab=Frequent
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| − | # Export <code>[[dockerd]]</code> metrics to Prometheus: https://docs.docker.com/config/daemon/prometheus/, modify <code>[[/etc/docker/daemon.json]]</code>
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| − | == Related terms ==
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| − | * [[PromQL]]
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| − | * [[Elasticsearch]]
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| − | * Exporters: [[Nginx]] ([https://github.com/nginxinc/nginx-prometheus-exporter nginx-prometheus-exporter]), [[Node exporter]]
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| − | * [[Cortex]], Prometheus as a service
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| − | * [[Loki]]
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| − | * [[CKA]]: [[Understand how to monitor applications in Kubernetes]]
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| − | * <code>[[.tpl]]</code>
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| − | * <code>[[alert:]]</code>
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| − | * [[AWS CloudWatch Container Insights]]
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| − | * [[Amazon Managed Service for Prometheus]]
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| − | * [[Kubernetes Metrics Server]]
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| − | * [[Fluent Bit]]
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| − | * [[GitLab 12.5]] Automatically close GitLab issues with recovery alerts from [[Prometheus]]
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| − | * [[Prometheus-node-exporter Debian configuration file]]
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| − | * <code>[[/metrics]]</code>
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| − | * [[Amazon Managed Prometheus]]
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| − | * [[Google Cloud Managed Prometheus]]
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| − | * <code>[[level=error]] ... [[no space left on device]]</code>
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| − | * [[Prometheus API]]
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| − | * [[Logz.io]]
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| − | == See also ==
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| − | * {{Prometheus alternatives}}
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| − | * {{Prometheus}}
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| − | * {{monitoring software}}
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| − | * {{TSDB}}
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| − | [[Category:Monitoring]]
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| − | [[Category:Prometheus]]
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| − | [[Category:CNCF]]
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| − | {{CC license}}
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| − | Source: https://en.wikiversity.org/wiki/Prometheus_monitoring
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