180 lines
9 KiB
Markdown
180 lines
9 KiB
Markdown
# Prometheus integration
|
|
|
|
> [Introduced][ce-8935] in GitLab 9.0.
|
|
|
|
GitLab offers powerful integration with [Prometheus] for monitoring your apps.
|
|
Metrics are retrieved from the configured Prometheus server, and then displayed
|
|
within the GitLab interface.
|
|
|
|
Each project can be configured with its own specific Prometheus server, see the
|
|
[configuration](#configuration) section for more details. If you have a single
|
|
Prometheus server which monitors all of your infrastructure, you can pre-fill
|
|
the settings page with a default template. To configure the template, see the
|
|
[Services templates](services_templates.md) document.
|
|
|
|
## Requirements
|
|
|
|
Integration with Prometheus requires the following:
|
|
|
|
1. GitLab 9.0 or higher
|
|
1. Prometheus must be configured to collect one of the [supported metrics](prometheus_library/metrics.md)
|
|
1. Each metric must be have a label to indicate the environment
|
|
1. GitLab must have network connectivity to the Prometheus server
|
|
|
|
## Getting started with Prometheus monitoring
|
|
|
|
Depending on your deployment and where you have located your GitLab server, there are a few options to get started with Prometheus monitoring.
|
|
|
|
* If both GitLab and your applications are installed in the same Kubernetes cluster, you can leverage the [bundled Prometheus server within GitLab](#configuring-omnibus-gitlab-prometheus-to-monitor-kubernetes).
|
|
* If your applications are deployed on Kubernetes, but GitLab is not in the same cluster, then you can [configure a Prometheus server in your Kubernetes cluster](#configuring-your-own-prometheus-server-within-kubernetes).
|
|
* If your applications are not running in Kubernetes, [get started with Prometheus](#getting-started-with-prometheus-outside-of-kubernetes).
|
|
|
|
### Getting started with Prometheus outside of Kubernetes
|
|
|
|
Installing and configuring Prometheus to monitor applications is fairly straight forward.
|
|
|
|
1. [Install Prometheus](https://prometheus.io/docs/introduction/install/)
|
|
1. Set up one of the [supported monitoring targets](prometheus_library/metrics.md)
|
|
1. Configure the Prometheus server to [collect their metrics](https://prometheus.io/docs/operating/configuration/#scrape_config)
|
|
|
|
### Configuring Omnibus GitLab Prometheus to monitor Kubernetes deployments
|
|
|
|
With Omnibus GitLab running inside of Kubernetes, you can leverage the bundled
|
|
version of Prometheus to collect the supported metrics. Once enabled, Prometheus will automatically begin monitoring Kubernetes Nodes and any [annotated Pods](https://prometheus.io/docs/operating/configuration/#<kubernetes_sd_config>).
|
|
|
|
1. Read how to configure the bundled Prometheus server in the
|
|
[Administration guide][gitlab-prometheus-k8s-monitor].
|
|
1. Now that Prometheus is configured, proceed on
|
|
[configuring the Prometheus project service in GitLab](#configuration-in-gitlab).
|
|
|
|
### Configuring your own Prometheus server within Kubernetes
|
|
|
|
Setting up and configuring Prometheus within Kubernetes is quick and painless.
|
|
The Prometheus project provides an [official Docker image][prometheus-docker-image]
|
|
which we can use as a starting point.
|
|
|
|
To get started quickly, we have provided a [sample YML file][prometheus-yml]
|
|
that can be used as a template. This file will create a `prometheus` **Namespace**,
|
|
**Service**, **Deployment**, and **ConfigMap** in Kubernetes. You can upload
|
|
this file to the Kubernetes dashboard using **+ Create** at the top right.
|
|
|
|
|
|
|
|
Or use `kubectl`:
|
|
|
|
```bash
|
|
kubectl apply -f path/to/prometheus.yml
|
|
```
|
|
|
|
Once deployed, you should see the Prometheus service, deployment, and
|
|
pod start within the `prometheus` namespace. The server will begin to collect
|
|
metrics from each Kubernetes Node in the cluster, based on the configuration
|
|
provided in the template. It will also attempt to collect metrics from any Kubernetes Pods that have been [annotated for Prometheus](https://prometheus.io/docs/operating/configuration/#pod).
|
|
|
|
Since GitLab is not running within Kubernetes, the template provides external
|
|
network access via a `NodePort` running on `30090`. This method allows access
|
|
to be controlled using provider firewall rules, like within Google Compute Engine.
|
|
|
|
Since a `NodePort` does not automatically have firewall rules created for it,
|
|
one will need to be created manually to allow access. In GCP/GKE, you will want
|
|
to confirm the Node that the Prometheus pod is running on. This can be done
|
|
either by looking at the Pod in the Kubernetes dashboard, or by running:
|
|
|
|
```bash
|
|
kubectl describe pods -n prometheus
|
|
```
|
|
|
|
Next on GKE, we need to get the `tag` of the Node or VM Instance, so we can
|
|
create an accurate firewall rule. The easiest way to do this is to go into the
|
|
Google Cloud Platform Compute console and select the VM instance that matches
|
|
the name of the Node gathered from the step above. In this case, the node tag
|
|
needed is `gke-prometheus-demo-5d5ada10-node`. Also make a note of the
|
|
**External IP**, which will be the IP address the Prometheus server is reachable
|
|
on.
|
|
|
|
|
|
|
|
Armed with the proper Node tag, the firewall rule can now be created
|
|
specifically for this node. To create the firewall rule, open the Google Cloud
|
|
Platform Networking console, and select **Firewall Rules**.
|
|
|
|
Create a new rule:
|
|
|
|
- Specify the source IP range to match your desired access list, which should
|
|
include your GitLab server. A sample of GitLab.com's IP address range is
|
|
available [in this issue][gitlab.com-ip-range], but note that GitLab.com's IPs
|
|
are subject to change without prior notification.
|
|
- Allowed protocol and port should be `tcp:30090`.
|
|
- The target tags should match the Node tag identified earlier in this step.
|
|
|
|
|
|
|
|
---
|
|
|
|
Now that Prometheus is configured, proceed to
|
|
[configure the Prometheus project service in GitLab](##configuration-in-gitlab).
|
|
|
|
## Configuration in GitLab
|
|
|
|
The actual configuration of Prometheus integration within GitLab is very simple.
|
|
All you will need is the DNS or IP address of the Prometheus server you'd like
|
|
to integrate with.
|
|
|
|
1. Navigate to the [Integrations page](project_services.md#accessing-the-project-services)
|
|
1. Click the **Prometheus** service
|
|
1. Provide the base URL of the your server, for example `http://prometheus.example.com/`.
|
|
The **Test Settings** button can be used to confirm connectivity from GitLab
|
|
to the Prometheus server.
|
|
|
|
|
|
|
|
## Monitoring CI/CD Environments
|
|
|
|
Once configured, GitLab will attempt to retrieve performance metrics for any
|
|
environment which has had a successful deployment.
|
|
|
|
[Learn more about monitoring environments.](../../../ci/environments.md#monitoring-environments)
|
|
|
|
## Determining the performance impact of a merge
|
|
|
|
> [Introduced][ce-10408] in GitLab 9.2.
|
|
> GitLab 9.3 added the [numeric comparison](https://gitlab.com/gitlab-org/gitlab-ce/issues/27439) of the 30 minute averages.
|
|
> Requires [Kubernetes](prometheus_library/kubernetes.md) metrics
|
|
|
|
Developers can view theperformance impact of their changes within the merge
|
|
request workflow. When a source branch has been deployed to an environment, a sparkline and numeric comparison of the average memory consumption will appear. On the sparkline, a dot
|
|
indicates when the current changes were deployed, with up to 30 minutes of
|
|
performance data displayed before and after. The comparison shows the difference between the 30 minute average before and after the deployment. This information is updated after
|
|
each commit has been deployed.
|
|
|
|
Once merged and the target branch has been redeployed, the metrics will switch
|
|
to show the new environments this revision has been deployed to.
|
|
|
|
Performance data will be available for the duration it is persisted on the
|
|
Prometheus server.
|
|
|
|
|
|
|
|
## Troubleshooting
|
|
|
|
If the "Attempting to load performance data" screen continues to appear, it could be due to:
|
|
|
|
- No successful deployments have occurred to this environment.
|
|
- Prometheus does not have performance data for this environment, or the metrics
|
|
are not labeled correctly. To test this, connect to the Prometheus server and
|
|
[run a query](#gitlab-prometheus-queries), replacing `$CI_ENVIRONMENT_SLUG`
|
|
with the name of your environment.
|
|
|
|
[autodeploy]: ../../../ci/autodeploy/index.md
|
|
[kubernetes]: https://kubernetes.io
|
|
[kube]: ./kubernetes.md
|
|
[prometheus-k8s-sd]: https://prometheus.io/docs/operating/configuration/#<kubernetes_sd_config>
|
|
[prometheus]: https://prometheus.io
|
|
[gitlab-prometheus-k8s-monitor]: ../../../administration/monitoring/prometheus/index.md#configuring-prometheus-to-monitor-kubernetes
|
|
[prometheus-docker-image]: https://hub.docker.com/r/prom/prometheus/
|
|
[prometheus-yml]:samples/prometheus.yml
|
|
[gitlab.com-ip-range]: https://gitlab.com/gitlab-com/infrastructure/issues/434
|
|
[ci-environment-slug]: https://docs.gitlab.com/ce/ci/variables/#predefined-variables-environment-variables
|
|
[ce-8935]: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/8935
|
|
[ce-10408]: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/10408
|
|
[promgldocs]: ../../../administration/monitoring/prometheus/index.md
|