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Chapter 3. Installing Red Hat Developer Hub in an air-gapped environment with the Helm Chart

An air-gapped environment, also known as an air-gapped network or isolated network, ensures security by physically segregating the system or network. This isolation is established to prevent unauthorized access, data transfer, or communication between the air-gapped system and external sources.

You can install Red Hat Developer Hub in an air-gapped environment to ensure security and meet specific regulatory requirements.

To install Developer Hub in an air-gapped environment, you must have access to the registry.redhat.io and the registry for the air-gapped environment.

Prerequisites

  • You have installed an Red Hat OpenShift Container Platform 4.13 or later.
  • You have access to the registry.redhat.io.
  • You have access to the Red Hat OpenShift Container Platform image registry of your cluster. For more information about exposing the image registry, see the Red Hat OpenShift Container Platform documentation about Exposing the registry.
  • You have installed the OpenShift CLI (oc) on your workstation.
  • You have installed the podman command line tools on your workstation.
  • You you have an account in Red Hat Developer portal.

Procedure

  1. Log in to your OpenShift Container Platform account using the OpenShift CLI (oc), by running the following command: 

    oc login -u <user> -p <password> https://api.<hostname>:6443
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  2. Log in to the OpenShift Container Platform image registry using the podman command line tool, by running the following command: 

    podman login -u kubeadmin -p $(oc whoami -t) default-route-openshift-image-registry.<hostname>
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    Note

    You can run the following commands to get the full host name of the OpenShift Container Platform image registry, and then use the host name in a command to log in: 

    REGISTRY_HOST=$(oc get route default-route -n openshift-image-registry --template='{{ .spec.host }}')
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    podman login -u kubeadmin -p $(oc whoami -t) $REGISTRY_HOST
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  3. Log in to the registry.redhat.io in podman by running the following command: 

    podman login registry.redhat.io
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    For more information about registry authentication, see Red Hat Container Registry Authentication.

  4. Pull Developer Hub and PostgreSQL images from Red Hat Image registry to your workstation, by running the following commands: 

    podman pull registry.redhat.io/rhdh/rhdh-hub-rhel9:1.2.6
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    podman pull registry.redhat.io/rhel9/postgresql-15:latest
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  5. Push both images to the internal OpenShift Container Platform image registry by running the following commands: 

    podman push --remove-signatures registry.redhat.io/rhdh/rhdh-hub-rhel9:1.2.6 default-route-openshift-image-registry.<hostname>/<project_name>/rhdh-hub-rhel9:1.2.6
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    podman push --remove-signatures registry.redhat.io/rhel9/postgresql-15:latest default-route-openshift-image-registry.<hostname>/<project_name>/postgresql-15:latest
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    For more information about pushing images directly to the OpenShift Container Platform image registry, see How do I push an Image directly into the OpenShift 4 registry.

    Important

  6. Use the following command to verify that both images are present in the internal OpenShift Container Platform registry: 

    oc get imagestream -n <project_name>
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  7. Enable local image lookup for both images by running the following commands: 

    oc set image-lookup postgresql-15
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    oc set image-lookup  rhdh-hub-rhel9
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  8. Go to YAML view and update the image section for backstage and postgresql using the following values:

    Example values for Developer Hub image

    upstream:
  backstage:
    image:
      registry: ""
      repository: rhdh-hub-rhel9
      tag: latest
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    Example values for PostgreSQL image

    upstream:
  postgresql:
    image:
      registry: ""
      repository: postgresql-15
      tag: latest
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  9. Install the Red Hat Developer Hub using Helm chart.
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