How to configure gitlab chart with private nexus registry for images

To configure GitLab chart with a private Nexus registry for images, you will need to do the following:

1. Create a Kubernetes secret for your Nexus registry credentials:

kubectl create secret docker-registry nexus-registry \
  --docker-server=<your-nexus-registry-url> \
  --docker-username=<your-nexus-registry-username> \
  --docker-password=<your-nexus-registry-password> \
  --docker-email=<your-email-address>

2. Update the values.yaml file for the GitLab chart to include the imagePullSecrets field, which references the secret you just created:

global:
  imagePullSecrets:
    - name: nexus-registry

3. Update the values.yaml file for the GitLab chart to include the registry field, which specifies the URL of your Nexus registry:

gitlab:
  registry:
    enabled: true
    host: <your-nexus-registry-url>

4. If you are using a self-signed certificate for your Nexus registry, you will need to add the certificate to the GitLab Runner’s trusted certificates. You can do this by adding the certificate as a Kubernetes secret and updating the values.yaml file for the GitLab Runner chart to include the extraVolumes and extraVolumeMounts fields:

gitlab-runner:
  runners:
    config: |
      [[runners.kubernetes.volumes.hostPath]]
      name = "certs"
      hostPath = "/etc/gitlab-runner/certs"
      mountPath = "/etc/gitlab-runner/certs"
      readOnly = true
    extraVolumes:
      - name: certs
        secret:
          secretName: nexus-registry-certs
    extraVolumeMounts:
      - name: certs
        mountPath: "/etc/gitlab-runner/certs"
        readOnly: true

5. Create a Kubernetes secret for your Nexus registry certificate:

kubectl create secret generic nexus-registry-certs \
  --from-file=<path-to-certificate-file>

6. Install the GitLab chart and the GitLab Runner chart with the updated values.yaml files:

helm install gitlab gitlab/gitlab -f gitlab-values.yaml
helm install gitlab-runner gitlab/gitlab-runner -f gitlab-runner-values.yaml

After following these steps, GitLab and GitLab Runner will be configured to use your private Nexus registry for images.

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Rajesh Kumar

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