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Using Red Hat subscriptions in builds

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Creating an image stream tag for the Red Hat Universal Base Image

To install Red Hat Enterprise Linux (RHEL) packages within a build, you can create an image stream tag to reference the Red Hat Universal Base Image (UBI).

To make the UBI available in every project in the cluster, add the image stream tag to the openshift namespace. Otherwise, to make it available in a specific project, add the image stream tag to that project.

Image stream tags grant access to the UBI by using the registry.redhat.io credentials that are present in the install pull secret, without exposing the pull secret to other users. This method is more convenient than requiring each developer to install pull secrets with registry.redhat.io credentials in each project.

Procedure

  • To create an ImageStreamTag resource in a single project, enter the following command:

    $ oc tag --source=docker registry.redhat.io/ubi9/ubi:latest ubi:latest

    You can alternatively apply the following YAML to create an ImageStreamTag resource in a single project:

    apiVersion: image.openshift.io/v1
kind: ImageStream
metadata:
  name: ubi9
spec:
  tags:
  - from:
      kind: DockerImage
      name: registry.redhat.io/ubi9/ubi:latest
    name: latest
    referencePolicy:
      type: Source
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Adding subscription entitlements as a build secret

Builds that use Red Hat subscriptions to install content must include the entitlement keys as a build secret.

Prerequisites

  • You must have access to the cluster as a user with the cluster-admin role or you have permission to access secrets in the openshift-config-managed project.

Procedure

  1. Copy the entitlement secret from the openshift-config-managed namespace to the namespace of the build by entering the following commands:

    $ cat << EOF > secret-template.txt
kind: Secret
apiVersion: v1
metadata:
  name: etc-pki-entitlement
type: Opaque
data: {{ range \$key, \$value := .data }}
  {{ \$key }}: {{ \$value }} {{ end }}
EOF
$ oc get secret etc-pki-entitlement -n openshift-config-managed -o=go-template-file --template=secret-template.txt | oc apply -f -

  2. Add the etc-pki-entitlement secret as a build volume in the build configuration’s Docker strategy:

    strategy:
  dockerStrategy:
    from:
      kind: ImageStreamTag
      name: ubi9:latest
    volumes:
    - name: etc-pki-entitlement
      mounts:
      - destinationPath: /etc/pki/entitlement
      source:
        type: Secret
        secret:
          secretName: etc-pki-entitlement
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Running builds with Subscription Manager

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Docker builds using Subscription Manager

Docker strategy builds can use yum or dnf to install additional Red Hat Enterprise Linux (RHEL) packages.

Prerequisites

  • The entitlement keys must be added as build strategy volumes.

Procedure

  • Use the following as an example Dockerfile to install content with the Subscription Manager:

    FROM registry.redhat.io/ubi9/ubi:latest
RUN rm -rf /etc/rhsm-host (1)
RUN yum --enablerepo=codeready-builder-for-rhel-9-x86_64-rpms install \ (2)
    nss_wrapper \
    uid_wrapper -y && \
    yum clean all -y
RUN ln -s /run/secrets/rhsm /etc/rhsm-host (3)
    1 You must include the command to remove the /etc/rhsm-host directory and all its contents in your Dockerfile before executing any yum or dnf commands.
    2 Use the Red Hat Package Browser to find the correct repositories for your installed packages.
    3 You must restore the /etc/rhsm-host symbolic link to keep your image compatible with other Red Hat container images.

Running builds with Red Hat Satellite subscriptions

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Adding Red Hat Satellite configurations to builds

Builds that use Red Hat Satellite to install content must provide appropriate configurations to obtain content from Satellite repositories.

Prerequisites

  • You must provide or create a yum-compatible repository configuration file that downloads content from your Satellite instance.

    Sample repository configuration
    [test-<name>]
name=test-<number>
baseurl = https://satellite.../content/dist/rhel/server/7/7Server/x86_64/os
enabled=1
gpgcheck=0
sslverify=0
sslclientkey = /etc/pki/entitlement/...-key.pem
sslclientcert = /etc/pki/entitlement/....pem
Procedure

  1. Create a ConfigMap object containing the Satellite repository configuration file by entering the following command:

    $ oc create configmap yum-repos-d --from-file /path/to/satellite.repo

  2. Add the Satellite repository configuration and entitlement key as a build volumes:

    strategy:
  dockerStrategy:
    from:
      kind: ImageStreamTag
      name: ubi9:latest
    volumes:
    - name: yum-repos-d
      mounts:
      - destinationPath: /etc/yum.repos.d
      source:
        type: ConfigMap
        configMap:
          name: yum-repos-d
    - name: etc-pki-entitlement
      mounts:
      - destinationPath: /etc/pki/entitlement
      source:
        type: Secret
        secret:
          secretName: etc-pki-entitlement
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Docker builds using Red Hat Satellite subscriptions

Docker strategy builds can use Red Hat Satellite repositories to install subscription content.

Prerequisites

  • You have added the entitlement keys and Satellite repository configurations as build volumes.

Procedure

  • Use the following example to create a Dockerfile for installing content with Satellite:

    FROM registry.redhat.io/ubi9/ubi:latest
RUN rm -rf /etc/rhsm-host (1)
RUN yum --enablerepo=codeready-builder-for-rhel-9-x86_64-rpms install \ (2)
    nss_wrapper \
    uid_wrapper -y && \
    yum clean all -y
RUN ln -s /run/secrets/rhsm /etc/rhsm-host (3)
    1 You must include the command to remove the /etc/rhsm-host directory and all its contents in your Dockerfile before executing any yum or dnf commands.
    2 Contact your Satellite system administrator to find the correct repositories for the build’s installed packages.
    3 You must restore the /etc/rhsm-host symbolic link to keep your image compatible with other Red Hat container images.
Additional resources

Additional resources