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Monitoring Kubernetes
Introduced in GitLab 9.0
GitLab has support for automatically detecting and monitoring Kubernetes metrics. Kubernetes exposes Node level metrics out of the box via the built-in Prometheus metrics support in cAdvisor. No additional services or exporters are needed.
Metrics supported
| Name | Query |
|---|---|
| Average Memory Usage (MB) | (sum(container_memory_usage_bytes{container_name!="POD",%{environment_filter}}) / count(container_memory_usage_bytes{container_name!="POD",%{environment_filter}})) /1024/1024 |
| Average CPU Utilization (%) | sum(rate(container_cpu_usage_seconds_total{container_name!="POD",%{environment_filter}}[2m])) by (cpu) * 100 |
Configuring Prometheus to monitor for Kubernetes node metrics
In order for Prometheus to collect Kubernetes metrics, you first must have a Prometheus server up and running. You have two options here:
- If you have an Omnibus based GitLab installation within your Kubernetes cluster, you can leverage the bundled Prometheus server to monitor Kubernetes.
- To configure your own Prometheus server, you can follow the Prometheus documentation or our guide.
Specifying the Environment label
In order to isolate and only display relevant metrics for a given environment
however, GitLab needs a method to detect which labels are associated. To do this, GitLab will look for an environment label.
If you are using [GitLab Auto-Deploy][../../../ci/autodeploy/index.md] and one of the two provided Kubernetes monitoring solutions, the environment label will be automatically added.