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Working with Prometheus

For more information on working with Prometheus metrics, see the documentation.

Access the UI of a Prometheus managed application in Kubernetes

You can connect directly to Prometheus, and view the Prometheus user interface, when using a Prometheus managed application in Kubernetes:

Find the name of the Prometheus pod in the user interface of your Kubernetes provider, such as GKE, or by running the following kubectl command in your terminal:
```
kubectl get pods -n gitlab-managed-apps | grep 'prometheus-prometheus-server'
```
The command should return a result like the following example, where prometheus-prometheus-server-55b4bd64c9-dpc6b is the name of the Prometheus pod:
```
gitlab-managed-apps  prometheus-prometheus-server-55b4bd64c9-dpc6b  2/2  Running  0  71d
```
Run a kubectl port-forward command. In the following example, 9090 is the Prometheus server's listening port:
```
 kubectl port-forward prometheus-prometheus-server-55b4bd64c9-dpc6b 9090:9090 -n gitlab-managed-apps
```
The port-forward command forwards all requests sent to your system's 9090 port to the 9090 port of the Prometheus pod. If the 9090 port on your system is used by another application, you can change the port number before the colon to your desired port. For example, to forward port 8080 of your local system, change the command to:
```
kubectl port-forward prometheus-prometheus-server-55b4bd64c9-dpc6b 8080:9090 -n gitlab-managed-apps
```
Open localhost:9090 in your browser to display the Prometheus user interface.