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Chapter 3. Configuring Red Hat Developer Hub deployment when using the operator

The Red Hat Developer Hub operator exposes a rhdh.redhat.com/v1alpha2 API Version of its Custom Resource Definition (CRD). This CRD exposes a generic spec.deployment.patch field, which gives you full control over the Developer Hub Deployment resource. This field can be a fragment of the standard apps.Deployment Kubernetes object.

Procedure

  1. Create a Developer Hub Custom Resource Definition with the following fields:

Example

apiVersion: rhdh.redhat.com/v1alpha2
kind: Backstage
metadata:
  name: developer-hub
spec:
  deployment:
    patch:
      spec:
        template:

labels

Add labels to the Developer Hub pod.

Example adding the label my=true

apiVersion: rhdh.redhat.com/v1alpha2
kind: Backstage
metadata:
  name: developer-hub
spec:
  deployment:
    patch:
      spec:
        template:
          metadata:
            labels:
              my: true

volumes

Add an additional volume named my-volume and mount it under /my/path in the Developer Hub application container.

Example additional volume

apiVersion: rhdh.redhat.com/v1alpha2
kind: Backstage
metadata:
  name: developer-hub
spec:
  deployment:
    patch:
      spec:
        template:
          spec:
            containers:
              - name: backstage-backend
                volumeMounts:
                  - mountPath: /my/path
                    name: my-volume
            volumes:
              - ephemeral:
                  volumeClaimTemplate:
                    spec:
                      storageClassName: "special"
                name: my-volume

Replace the default dynamic-plugins-root volume with a persistent volume claim (PVC) named dynamic-plugins-root. Note the $patch: replace directive, otherwise a new volume will be added.

Example dynamic-plugins-root volume replacement

apiVersion: rhdh.redhat.com/v1alpha2
kind: Backstage
metadata:
  name: developer-hub
spec:
  deployment:
    patch:
      spec:
        template:
          spec:
            volumes:
              - $patch: replace
                name: dynamic-plugins-root
                persistentVolumeClaim:
                  claimName: dynamic-plugins-root

cpu request

Set the CPU request for the Developer Hub application container to 250m.

Example CPU request

apiVersion: rhdh.redhat.com/v1alpha2
kind: Backstage
metadata:
  name: developer-hub
spec:
  deployment:
    patch:
      spec:
        template:
          spec:
            containers:
              - name: backstage-backend
                resources:
                  requests:
                    cpu: 250m

my-sidecar container

Add a new my-sidecar sidecar container into the Developer Hub Pod.

Example side car container

apiVersion: rhdh.redhat.com/v1alpha2
kind: Backstage
metadata:
  name: developer-hub
spec:
  deployment:
    patch:
      spec:
        template:
          spec:
            containers:
              - name: my-sidecar
                image: quay.io/my-org/my-sidecar:latest

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