Chapter 2. Installation configuration

1. Install the required packages:

   # yum -y install podman httpd-tools

   The podman package provides the container package that you run the registry in. The httpd-tools package provides the htpasswd utility, which you use to create users.

2. Create folders for the registry:

   # mkdir -p /opt/registry/{auth,certs,data}

   These folders are mounted inside the registry container.

3. Provide a certificate for the registry. If you do not have an existing, trusted certificate authority, you can generate a self-signed certificate:

   $ cd /opt/registry/certs
   # openssl req -newkey rsa:4096 -nodes -sha256 -keyout domain.key -x509 -days 365 -out domain.crt

   At the prompts, provide the required values for the certificate:

   Country Name (2 letter code)	Specify the two-letter ISO country code for your location. See the ISO 3166 country codes standard.
   State or Province Name (full name)	Enter the full name of your state or province.
   Locality Name (eg, city)	Enter the name of your city.
   Organization Name (eg, company)	Enter your company name.
   Organizational Unit Name (eg, section)	Enter your department name.
   Common Name (eg, your name or your server’s hostname)	Enter the host name for the registry host. Ensure that your hostname is in DNS and that it resolves to the expected IP address.
   Email Address	Enter your email address. For more information, see the req description in the OpenSSL documentation.

4. Generate a user name and a password for your registry that uses the bcrpt format:

   # htpasswd -bBc /opt/registry/auth/htpasswd <user_name> <password> 1

   1

   Replace <user_name> and <password> with a user name and a password.

5. Create the mirror-registry container to host your registry:

   # podman run --name mirror-registry -p <local_registry_host_port>:5000 \ 1
        -v /opt/registry/data:/var/lib/registry:z \
        -v /opt/registry/auth:/auth:z \
        -e "REGISTRY_AUTH=htpasswd" \
        -e "REGISTRY_AUTH_HTPASSWD_REALM=Registry Realm" \
        -e REGISTRY_AUTH_HTPASSWD_PATH=/auth/htpasswd \
        -v /opt/registry/certs:/certs:z \
        -e REGISTRY_HTTP_TLS_CERTIFICATE=/certs/domain.crt \
        -e REGISTRY_HTTP_TLS_KEY=/certs/domain.key \
        -e REGISTRY_COMPATIBILITY_SCHEMA1_ENABLED=true \
        -d docker.io/library/registry:2

   1

   For <local_registry_host_port>, specify the port that your mirror registry uses to serve content.

6. Open the required ports for your registry:

   # firewall-cmd --add-port=<local_registry_host_port>/tcp --zone=internal --permanent 1
   # firewall-cmd --add-port=<local_registry_host_port>/tcp --zone=public   --permanent 2
   # firewall-cmd --reload

   1 2

   For <local_registry_host_port>, specify the port that your mirror registry uses to serve content.

7. Add the self-signed certificate to your list of trusted certificates:

   # cp /opt/registry/certs/domain.crt /etc/pki/ca-trust/source/anchors/
   # update-ca-trust

   You must trust your certificate to log in to your registry during the mirror process.

8. Confirm that the registry is available:

   $ curl -u <user_name>:<password> -k https://<local_registry_host_name>:<local_registry_host_port>/v2/_catalog 1
   
   {"repositories":[]}

   1

   For <user_name> and <password>, specify the user name and password for your registry. For <local_registry_host_name>, specify the registry domain name that you specified in your certificate, such as registry.example.com. For <local_registry_host_port>, specify the port that your mirror registry uses to serve content.

   If the command output displays an empty repository, your registry is available.

1. Download your registry.redhat.io pull secret from the Pull Secret page on the Red Hat OpenShift Cluster Manager site.

2. Generate the base64-encoded user name and password or token for your mirror registry:

   $ echo -n '<user_name>:<password>' | base64 -w0 1
   
   BGVtbYk3ZHAtqXs=

   1

   For <user_name> and <password>, specify the user name and password that you configured for your registry.

3. Make a copy of your pull secret in JSON format:

   $ cat ./pull-secret.text | jq .  > <path>/<pull-secret-file>1

   1

   Specify the path to the folder to store the pull secret in and a name for the JSON file that you create.

   The contents of the file resemble the following example:

   {
     "auths": {
       "cloud.openshift.com": {
         "auth": "b3BlbnNo...",
         "email": "you@example.com"
       },
       "quay.io": {
         "auth": "b3BlbnNo...",
         "email": "you@example.com"
       },
       "registry.connect.redhat.com": {
         "auth": "NTE3Njg5Nj...",
         "email": "you@example.com"
       },
       "registry.redhat.io": {
         "auth": "NTE3Njg5Nj...",
         "email": "you@example.com"
       }
     }
   }

4. Edit the new file and add a section that describes your registry to it:

     "auths": {
   ...
       "<mirror_registry>": { 1
         "auth": "<credentials>", 2
         "email": "you@example.com"
     },
   ...

   1

   For <mirror_registry>, specify the registry domain name, and optionally the port, that your mirror registry uses to serve content. For example, registry.example.com or registry.example.com:5000

   2

   For <credentials>, specify the base64-encoded user name and password for the mirror registry.

   The file resembles the following example:

   {
     "auths": {
       "cloud.openshift.com": {
         "auth": "b3BlbnNo...",
         "email": "you@example.com"
       },
       "quay.io": {
         "auth": "b3BlbnNo...",
         "email": "you@example.com"
       },
       "registry.connect.redhat.com": {
         "auth": "NTE3Njg5Nj...",
         "email": "you@example.com"
       },
       "<mirror_registry>": {
         "auth": "<credentials>",
         "email": "you@example.com"
       },
       "registry.redhat.io": {
         "auth": "NTE3Njg5Nj...",
         "email": "you@example.com"
       }
     }
   }

1. Review the OpenShift Container Platform downloads page to determine the version of OpenShift Container Platform that you want to install.

2. Set the required environment variables:

   $ export OCP_RELEASE=<release_version> 1
   $ export LOCAL_REGISTRY='<local_registry_host_name>:<local_registry_host_port>' 2
   $ export LOCAL_REPOSITORY='<repository_name>' 3
   $ export PRODUCT_REPO='openshift-release-dev' 4
   $ export LOCAL_SECRET_JSON='<path_to_pull_secret>' 5
   $ export RELEASE_NAME="ocp-release" 6

   1

   For <release_version>, specify the version number of OpenShift Container Platform to install, such as 4.2.0.

   2

   For <local_registry_host_name>, specify the registry domain name for your mirror repository, and for <local_registry_host_port>, specify the port that it serves content on.

   3

   For <repository_name>, specify the name of the repository to create in your registry, such as ocp4/openshift4.

   4

   The repository to mirror. For a production release, you must specify openshift-release-dev.

   5

   For <path_to_pull_secret>, specify the absolute path to and file name of the pull secret for your mirror registry that you created.

   6

   The release mirror. For a production release, you must specify ocp-release.

3. Mirror the repository:

   $ oc adm -a ${LOCAL_SECRET_JSON} release mirror \
        --from=quay.io/${PRODUCT_REPO}/${RELEASE_NAME}:${OCP_RELEASE} \
        --to=${LOCAL_REGISTRY}/${LOCAL_REPOSITORY} \
        --to-release-image=${LOCAL_REGISTRY}/${LOCAL_REPOSITORY}:${OCP_RELEASE}

   This command pulls the release information as a digest, and its output includes the imageContentSources data that you require when you install your cluster.

4. Record the entire imageContentSources section from the output of the previous command. The information about your mirrors is unique to your mirrored repository, and you must add the imageContentSources section to the install-config.yaml file during installation.

5. To create the installation program that is based on the content that you mirrored, extract it and pin it to the release:

   $ oc adm -a ${LOCAL_SECRET_JSON} release extract --command=openshift-install "${LOCAL_REGISTRY}/${LOCAL_REPOSITORY}:${OCP_RELEASE}"

   Important

   To ensure that you use the correct images for the version of OpenShift Container Platform that you selected, you must extract the installation program from the mirrored content.

   You must perform this step on a machine with an active internet connection.

Procedure

1. Access the images of a specific imagestream to mirror, for example:

   $ oc get is <imagestream> -n openshift -o json | jq .spec.tags[].from.name | grep registry.redhat.io

2. Mirror images from registry.redhat.io associated with any imagestreams you need in the restricted network environment into one of the defined mirrors, for example:

   $ oc image mirror registry.redhat.io/rhscl/ruby-25-rhel7:latest ${MIRROR_ADDR}/rhscl/ruby-25-rhel7:latest

3. Add the required trusted CAs for the mirror in the cluster’s image configuration object:

   $ oc create configmap registry-config --from-file=${MIRROR_ADDR_HOSTNAME}..5000=$path/ca.crt -n openshift-config
   $ oc patch image.config.openshift.io/cluster --patch '{"spec":{"additionalTrustedCA":{"name":"registry-config"}}}' --type=merge

4. Update the samplesRegistry field in the Samples Operator configuration object to contain the hostname portion of the mirror location defined in the mirror configuration:

   $ oc get configs.samples.operator.openshift.io -n openshift-cluster-samples-operator

   Note

   This is required because the imagestream import process does not use the mirror or search mechanism at this time.

5. Add any imagestreams that are not mirrored into the skippedImagestreams field of the Samples Operator configuration object. Or if you do not want to support any of the sample imagestreams, set the Samples Operator to Removed in the Samples Operator configuration object.

   Note

   Any unmirrored imagestreams that are not skipped, or if the Samples Operator is not changed to Removed, will result in the Samples Operator reporting a Degraded status two hours after the imagestream imports start failing.

   Many of the templates in the OpenShift namespace reference the imagestreams. So using Removed to purge both the imagestreams and templates will eliminate the possibility of attempts to use them if they are not functional because of any missing imagestreams.

Procedure

1. Whitelist the following registry URLs:

   URL	Function
   registry.redhat.io	Provides core container images
   quay.io	Provides core container images
   sso.redhat.com	The https://cloud.redhat.com/openshift site uses authentication from sso.redhat.com

2. Whitelist any site that provides resources for a language or framework that your builds require.

3. If you do not disable Telemetry, you must grant access to the following URLs to access Red Hat Insights:

   URL	Function
   cert-api.access.redhat.com	Required for Telemetry
   api.access.redhat.com	Required for Telemetry
   infogw.api.openshift.com	Required for Telemetry
   https://cloud.redhat.com/api/ingress	Required for Telemetry and for insights-operator

4. If you use Amazon Web Services (AWS), Microsoft Azure, or Google Cloud Platform (GCP) to host your cluster, you must grant access to the URLs that provide the cloud provider API and DNS for that cloud:

   Cloud	URL	Function
   AWS	*.amazonaws.com	Required to access AWS services and resources. Review the AWS Service Endpoints in the AWS documentation to determine the exact endpoints to allow for the regions that you use.
   GCP	*.googleapis.com	Required to access GCP services and resources. Review Cloud Endpoints in the GCP documentation to determine the endpoints to allow for your APIs.
   	accounts.google.com	Required to access your GCP account.
   Azure	management.azure.com	Required to access Azure services and resources. Review the Azure REST API Reference in the Azure documentation to determine the endpoints to allow for your APIs.

5. Whitelist the following URLs:

   URL	Function
   mirror.openshift.com	Required to access mirrored installation content and images. This site is also a source of release image signatures, although the Cluster Version Operator needs only a single functioning source.
   storage.googleapis.com/openshift-release	A source of release image signatures, although the Cluster Version Operator needs only a single functioning source.
   *.apps.<cluster_name>.<base_domain>	Required to access the default cluster routes unless you set an ingress wildcard during installation.
   quay-registry.s3.amazonaws.com	Required to access Quay image content in AWS.
   api.openshift.com	Required to check if updates are available for the cluster.
   art-rhcos-ci.s3.amazonaws.com	Required to download Red Hat Enterprise Linux CoreOS (RHCOS) images.
   api.openshift.com	Required for your cluster token.
   cloud.redhat.com/openshift	Required for your cluster token.