Chapter 3. Mirroring images for a disconnected installation
You can ensure your clusters only use container images that satisfy your organizational controls on external content. Before you install a cluster on infrastructure that you provision in a restricted network, you must mirror the required container images into that environment. To mirror container images, you must have a registry for mirroring.
You must have access to the internet to obtain the necessary container images. In this procedure, you place your mirror registry on a mirror host that has access to both your network and the internet. If you do not have access to a mirror host, use the Mirroring Operator catalogs for use with disconnected clusters procedure to copy images to a device you can move across network boundaries with.
3.1. Prerequisites
You must have a container image registry that supports Docker v2-2 in the location that will host the OpenShift Container Platform cluster, such as one of the following registries:
If you have an entitlement to Red Hat Quay, see the documentation on deploying Red Hat Quay for proof-of-concept purposes or by using the Red Hat Quay Operator. If you need additional assistance selecting and installing a registry, contact your sales representative or Red Hat Support.
- If you do not already have an existing solution for a container image registry, subscribers of OpenShift Container Platform are provided a mirror registry for Red Hat OpenShift. The mirror registry for Red Hat OpenShift is included with your subscription and is a small-scale container registry that can be used to mirror the required container images of OpenShift Container Platform in disconnected installations.
3.2. About the mirror registry
You can mirror the images that are required for OpenShift Container Platform installation and subsequent product updates to a container mirror registry such as Red Hat Quay, JFrog Artifactory, Sonatype Nexus Repository, or Harbor. If you do not have access to a large-scale container registry, you can use the mirror registry for Red Hat OpenShift, a small-scale container registry included with OpenShift Container Platform subscriptions.
You can use any container registry that supports Docker v2-2, such as Red Hat Quay, the mirror registry for Red Hat OpenShift, Artifactory, Sonatype Nexus Repository, or Harbor. Regardless of your chosen registry, the procedure to mirror content from Red Hat hosted sites on the internet to an isolated image registry is the same. After you mirror the content, you configure each cluster to retrieve this content from your mirror registry.
The OpenShift image registry cannot be used as the target registry because it does not support pushing without a tag, which is required during the mirroring process.
If choosing a container registry that is not the mirror registry for Red Hat OpenShift, it must be reachable by every machine in the clusters that you provision. If the registry is unreachable, installation, updating, or normal operations such as workload relocation might fail. For that reason, you must run mirror registries in a highly available way, and the mirror registries must at least match the production availability of your OpenShift Container Platform clusters.
When you populate your mirror registry with OpenShift Container Platform images, you can follow two scenarios. If you have a host that can access both the internet and your mirror registry, but not your cluster nodes, you can directly mirror the content from that machine. This process is referred to as connected mirroring. If you have no such host, you must mirror the images to a file system and then bring that host or removable media into your restricted environment. This process is referred to as disconnected mirroring.
For mirrored registries, to view the source of pulled images, you must review the Trying to access
log entry in the CRI-O logs. Other methods to view the image pull source, such as using the crictl images
command on a node, show the non-mirrored image name, even though the image is pulled from the mirrored location.
Red Hat does not test third party registries with OpenShift Container Platform.
Additional information
For information about viewing the CRI-O logs to view the image source, see Viewing the image pull source.
3.3. Preparing your mirror host
Before you perform the mirror procedure, you must prepare the host to retrieve content and push it to the remote location.
3.3.1. Installing the OpenShift CLI
You can install the OpenShift CLI (oc
) to interact with OpenShift Container Platform from a command-line interface. You can install oc
on Linux, Windows, or macOS.
If you installed an earlier version of oc
, you cannot use it to complete all of the commands in OpenShift Container Platform 4.17. Download and install the new version of oc
.
Installing the OpenShift CLI on Linux
You can install the OpenShift CLI (oc
) binary on Linux by using the following procedure.
Procedure
- Navigate to the OpenShift Container Platform downloads page on the Red Hat Customer Portal.
- Select the architecture from the Product Variant drop-down list.
- Select the appropriate version from the Version drop-down list.
- Click Download Now next to the OpenShift v4.17 Linux Client entry and save the file.
Unpack the archive:
$ tar xvf <file>
Place the
oc
binary in a directory that is on yourPATH
.To check your
PATH
, execute the following command:$ echo $PATH
Verification
After you install the OpenShift CLI, it is available using the
oc
command:$ oc <command>
Installing the OpenShift CLI on Windows
You can install the OpenShift CLI (oc
) binary on Windows by using the following procedure.
Procedure
- Navigate to the OpenShift Container Platform downloads page on the Red Hat Customer Portal.
- Select the appropriate version from the Version drop-down list.
- Click Download Now next to the OpenShift v4.17 Windows Client entry and save the file.
- Unzip the archive with a ZIP program.
Move the
oc
binary to a directory that is on yourPATH
.To check your
PATH
, open the command prompt and execute the following command:C:\> path
Verification
After you install the OpenShift CLI, it is available using the
oc
command:C:\> oc <command>
Installing the OpenShift CLI on macOS
You can install the OpenShift CLI (oc
) binary on macOS by using the following procedure.
Procedure
- Navigate to the OpenShift Container Platform downloads page on the Red Hat Customer Portal.
- Select the appropriate version from the Version drop-down list.
Click Download Now next to the OpenShift v4.17 macOS Client entry and save the file.
NoteFor macOS arm64, choose the OpenShift v4.17 macOS arm64 Client entry.
- Unpack and unzip the archive.
Move the
oc
binary to a directory on your PATH.To check your
PATH
, open a terminal and execute the following command:$ echo $PATH
Verification
Verify your installation by using an
oc
command:$ oc <command>
3.4. Configuring credentials that allow images to be mirrored
Create a container image registry credentials file that enables you to mirror images from Red Hat to your mirror.
Do not use this image registry credentials file as the pull secret when you install a cluster. If you provide this file when you install cluster, all of the machines in the cluster will have write access to your mirror registry.
This process requires that you have write access to a container image registry on the mirror registry and adds the credentials to a registry pull secret.
Prerequisites
- You configured a mirror registry to use in your disconnected environment.
- You identified an image repository location on your mirror registry to mirror images into.
- You provisioned a mirror registry account that allows images to be uploaded to that image repository.
Procedure
Complete the following steps on the installation host:
-
Download your
registry.redhat.io
pull secret from Red Hat OpenShift Cluster Manager. Make a copy of your pull secret in JSON format:
$ cat ./pull-secret | jq . > <path>/<pull_secret_file_in_json> 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" } } }
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.
Edit the JSON file and add a section that describes your registry to it:
"auths": { "<mirror_registry>": { 1 "auth": "<credentials>", 2 "email": "you@example.com" } },
The file resembles the following example:
{ "auths": { "registry.example.com": { "auth": "BGVtbYk3ZHAtqXs=", "email": "you@example.com" }, "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" } } }
3.5. Mirroring the OpenShift Container Platform image repository
Mirror the OpenShift Container Platform image repository to your registry to use during cluster installation or upgrade.
Prerequisites
- Your mirror host has access to the internet.
- You configured a mirror registry to use in your restricted network and can access the certificate and credentials that you configured.
- You downloaded the pull secret from Red Hat OpenShift Cluster Manager and modified it to include authentication to your mirror repository.
- If you use self-signed certificates, you have specified a Subject Alternative Name in the certificates.
Procedure
Complete the following steps on the mirror host:
- Review the OpenShift Container Platform downloads page to determine the version of OpenShift Container Platform that you want to install and determine the corresponding tag on the Repository Tags page.
Set the required environment variables:
Export the release version:
$ OCP_RELEASE=<release_version>
For
<release_version>
, specify the tag that corresponds to the version of OpenShift Container Platform to install, such as4.5.4
.Export the local registry name and host port:
$ LOCAL_REGISTRY='<local_registry_host_name>:<local_registry_host_port>'
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.Export the local repository name:
$ LOCAL_REPOSITORY='<local_repository_name>'
For
<local_repository_name>
, specify the name of the repository to create in your registry, such asocp4/openshift4
.Export the name of the repository to mirror:
$ PRODUCT_REPO='openshift-release-dev'
For a production release, you must specify
openshift-release-dev
.Export the path to your registry pull secret:
$ LOCAL_SECRET_JSON='<path_to_pull_secret>'
For
<path_to_pull_secret>
, specify the absolute path to and file name of the pull secret for your mirror registry that you created.Export the release mirror:
$ RELEASE_NAME="ocp-release"
For a production release, you must specify
ocp-release
.Export the type of architecture for your cluster:
$ ARCHITECTURE=<cluster_architecture> 1
- 1
- Specify the architecture of the cluster, such as
x86_64
,aarch64
,s390x
, orppc64le
.
Export the path to the directory to host the mirrored images:
$ REMOVABLE_MEDIA_PATH=<path> 1
- 1
- Specify the full path, including the initial forward slash (/) character.
Mirror the version images to the mirror registry:
If your mirror host does not have internet access, take the following actions:
- Connect the removable media to a system that is connected to the internet.
Review the images and configuration manifests to mirror:
$ oc adm release mirror -a ${LOCAL_SECRET_JSON} \ --from=quay.io/${PRODUCT_REPO}/${RELEASE_NAME}:${OCP_RELEASE}-${ARCHITECTURE} \ --to=${LOCAL_REGISTRY}/${LOCAL_REPOSITORY} \ --to-release-image=${LOCAL_REGISTRY}/${LOCAL_REPOSITORY}:${OCP_RELEASE}-${ARCHITECTURE} --dry-run
-
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 theimageContentSources
section to theinstall-config.yaml
file during installation. Mirror the images to a directory on the removable media:
$ oc adm release mirror -a ${LOCAL_SECRET_JSON} --to-dir=${REMOVABLE_MEDIA_PATH}/mirror quay.io/${PRODUCT_REPO}/${RELEASE_NAME}:${OCP_RELEASE}-${ARCHITECTURE}
Take the media to the restricted network environment and upload the images to the local container registry.
$ oc image mirror -a ${LOCAL_SECRET_JSON} --from-dir=${REMOVABLE_MEDIA_PATH}/mirror "file://openshift/release:${OCP_RELEASE}*" ${LOCAL_REGISTRY}/${LOCAL_REPOSITORY} 1
- 1
- For
REMOVABLE_MEDIA_PATH
, you must use the same path that you specified when you mirrored the images.
ImportantRunning
oc image mirror
might result in the following error:error: unable to retrieve source image
. This error occurs when image indexes include references to images that no longer exist on the image registry. Image indexes might retain older references to allow users running those images an upgrade path to newer points on the upgrade graph. As a temporary workaround, you can use the--skip-missing
option to bypass the error and continue downloading the image index. For more information, see Service Mesh Operator mirroring failed.
If the local container registry is connected to the mirror host, take the following actions:
Directly push the release images to the local registry by using following command:
$ oc adm release mirror -a ${LOCAL_SECRET_JSON} \ --from=quay.io/${PRODUCT_REPO}/${RELEASE_NAME}:${OCP_RELEASE}-${ARCHITECTURE} \ --to=${LOCAL_REGISTRY}/${LOCAL_REPOSITORY} \ --to-release-image=${LOCAL_REGISTRY}/${LOCAL_REPOSITORY}:${OCP_RELEASE}-${ARCHITECTURE}
This command pulls the release information as a digest, and its output includes the
imageContentSources
data that you require when you install your cluster.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 theimageContentSources
section to theinstall-config.yaml
file during installation.NoteThe image name gets patched to Quay.io during the mirroring process, and the podman images will show Quay.io in the registry on the bootstrap virtual machine.
To create the installation program that is based on the content that you mirrored, extract it and pin it to the release:
If your mirror host does not have internet access, run the following command:
$ oc adm release extract -a ${LOCAL_SECRET_JSON} --icsp-file=<file> --command=openshift-install "${LOCAL_REGISTRY}/${LOCAL_REPOSITORY}:${OCP_RELEASE}-${ARCHITECTURE}" \ --insecure=true 1
- 1
- Optional: If you do not want to configure trust for the target registry, add the
--insecure=true
flag.
If the local container registry is connected to the mirror host, run the following command:
$ oc adm release extract -a ${LOCAL_SECRET_JSON} --command=openshift-install "${LOCAL_REGISTRY}/${LOCAL_REPOSITORY}:${OCP_RELEASE}-${ARCHITECTURE}"
ImportantTo 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.
For clusters using installer-provisioned infrastructure, run the following command:
$ openshift-install
3.6. The Cluster Samples Operator in a disconnected environment
In a disconnected environment, you must take additional steps after you install a cluster to configure the Cluster Samples Operator. Review the following information in preparation.
3.6.1. Cluster Samples Operator assistance for mirroring
During installation, OpenShift Container Platform creates a config map named imagestreamtag-to-image
in the openshift-cluster-samples-operator
namespace. The imagestreamtag-to-image
config map contains an entry, the populating image, for each image stream tag.
The format of the key for each entry in the data field in the config map is <image_stream_name>_<image_stream_tag_name>
.
During a disconnected installation of OpenShift Container Platform, the status of the Cluster Samples Operator is set to Removed
. If you choose to change it to Managed
, it installs samples.
The use of samples in a network-restricted or discontinued environment may require access to services external to your network. Some example services include: Github, Maven Central, npm, RubyGems, PyPi and others. There might be additional steps to take that allow the cluster samples operators’s objects to reach the services they require.
You can use this config map as a reference for which images need to be mirrored for your image streams to import.
-
While the Cluster Samples Operator is set to
Removed
, you can create your mirrored registry, or determine which existing mirrored registry you want to use. - Mirror the samples you want to the mirrored registry using the new config map as your guide.
-
Add any of the image streams you did not mirror to the
skippedImagestreams
list of the Cluster Samples Operator configuration object. -
Set
samplesRegistry
of the Cluster Samples Operator configuration object to the mirrored registry. -
Then set the Cluster Samples Operator to
Managed
to install the image streams you have mirrored.
3.7. Mirroring Operator catalogs for use with disconnected clusters
You can mirror the Operator contents of a Red Hat-provided catalog, or a custom catalog, into a container image registry using the oc adm catalog mirror
command. The target registry must support Docker v2-2. For a cluster on a restricted network, this registry can be one that the cluster has network access to, such as a mirror registry created during a restricted network cluster installation.
- The OpenShift image registry cannot be used as the target registry because it does not support pushing without a tag, which is required during the mirroring process.
-
Running
oc adm catalog mirror
might result in the following error:error: unable to retrieve source image
. This error occurs when image indexes include references to images that no longer exist on the image registry. Image indexes might retain older references to allow users running those images an upgrade path to newer points on the upgrade graph. As a temporary workaround, you can use the--skip-missing
option to bypass the error and continue downloading the image index. For more information, see Service Mesh Operator mirroring failed.
The oc adm catalog mirror
command also automatically mirrors the index image that is specified during the mirroring process, whether it be a Red Hat-provided index image or your own custom-built index image, to the target registry. You can then use the mirrored index image to create a catalog source that allows Operator Lifecycle Manager (OLM) to load the mirrored catalog onto your OpenShift Container Platform cluster.
Additional resources
3.7.1. Prerequisites
Mirroring Operator catalogs for use with disconnected clusters has the following prerequisites:
- Workstation with unrestricted network access.
-
podman
version 1.9.3 or later. If you want to filter, or prune, an existing catalog and selectively mirror only a subset of Operators, see the following sections:
If you want to mirror a Red Hat-provided catalog, run the following command on your workstation with unrestricted network access to authenticate with
registry.redhat.io
:$ podman login registry.redhat.io
- Access to a mirror registry that supports Docker v2-2.
-
On your mirror registry, decide which repository, or namespace, to use for storing mirrored Operator content. For example, you might create an
olm-mirror
repository. - If your mirror registry does not have internet access, connect removable media to your workstation with unrestricted network access.
If you are working with private registries, including
registry.redhat.io
, set theREG_CREDS
environment variable to the file path of your registry credentials for use in later steps. For example, for thepodman
CLI:$ REG_CREDS=${XDG_RUNTIME_DIR}/containers/auth.json
3.7.2. Extracting and mirroring catalog contents
The oc adm catalog mirror
command extracts the contents of an index image to generate the manifests required for mirroring. The default behavior of the command generates manifests, then automatically mirrors all of the image content from the index image, as well as the index image itself, to your mirror registry.
Alternatively, if your mirror registry is on a completely disconnected, or airgapped, host, you can first mirror the content to removable media, move the media to the disconnected environment, then mirror the content from the media to the registry.
3.7.2.1. Mirroring catalog contents to registries on the same network
If your mirror registry is co-located on the same network as your workstation with unrestricted network access, take the following actions on your workstation.
Procedure
If your mirror registry requires authentication, run the following command to log in to the registry:
$ podman login <mirror_registry>
Run the following command to extract and mirror the content to the mirror registry:
$ oc adm catalog mirror \ <index_image> \ 1 <mirror_registry>:<port>[/<repository>] \ 2 [-a ${REG_CREDS}] \ 3 [--insecure] \ 4 [--index-filter-by-os='<platform>/<arch>'] \ 5 [--manifests-only] 6
- 1
- Specify the index image for the catalog that you want to mirror.
- 2
- Specify the fully qualified domain name (FQDN) for the target registry to mirror the Operator contents to. The mirror registry
<repository>
can be any existing repository, or namespace, on the registry, for exampleolm-mirror
as outlined in the prerequisites. If there is an existing repository found during mirroring, the repository name is added to the resulting image name. If you do not want the image name to include the repository name, omit the<repository>
value from this line, for example<mirror_registry>:<port>
. - 3
- Optional: If required, specify the location of your registry credentials file.
{REG_CREDS}
is required forregistry.redhat.io
. - 4
- Optional: If you do not want to configure trust for the target registry, add the
--insecure
flag. - 5
- Optional: Specify which platform and architecture of the index image to select when multiple variants are available. Images are passed as
'<platform>/<arch>[/<variant>]'
. This does not apply to images referenced by the index. Valid values arelinux/amd64
,linux/ppc64le
,linux/s390x
,linux/arm64
. - 6
- Optional: Generate only the manifests required for mirroring without actually mirroring the image content to a registry. This option can be useful for reviewing what will be mirrored, and lets you make any changes to the mapping list, if you require only a subset of packages. You can then use the
mapping.txt
file with theoc image mirror
command to mirror the modified list of images in a later step. This flag is intended for only advanced selective mirroring of content from the catalog.
Example output
src image has index label for database path: /database/index.db using database path mapping: /database/index.db:/tmp/153048078 wrote database to /tmp/153048078 1 ... wrote mirroring manifests to manifests-redhat-operator-index-1614211642 2
- 1
- Directory for the temporary
index.db
database generated by the command. - 2
- Record the manifests directory name that is generated. This directory is referenced in subsequent procedures.Note
Red Hat Quay does not support nested repositories. As a result, running the
oc adm catalog mirror
command will fail with a401
unauthorized error. As a workaround, you can use the--max-components=2
option when running theoc adm catalog mirror
command to disable the creation of nested repositories. For more information on this workaround, see the Unauthorized error thrown while using catalog mirror command with Quay registry Knowledgebase Solution.
Additional resources
3.7.2.2. Mirroring catalog contents to airgapped registries
If your mirror registry is on a completely disconnected, or airgapped, host, take the following actions.
Procedure
Run the following command on your workstation with unrestricted network access to mirror the content to local files:
$ oc adm catalog mirror \ <index_image> \ 1 file:///local/index \ 2 -a ${REG_CREDS} \ 3 --insecure \ 4 --index-filter-by-os='<platform>/<arch>' 5
- 1
- Specify the index image for the catalog that you want to mirror.
- 2
- Specify the content to mirror to local files in your current directory.
- 3
- Optional: If required, specify the location of your registry credentials file.
- 4
- Optional: If you do not want to configure trust for the target registry, add the
--insecure
flag. - 5
- Optional: Specify which platform and architecture of the index image to select when multiple variants are available. Images are specified as
'<platform>/<arch>[/<variant>]'
. This does not apply to images referenced by the index. Valid values arelinux/amd64
,linux/ppc64le
,linux/s390x
,linux/arm64
, and.*
Example output
... info: Mirroring completed in 5.93s (5.915MB/s) wrote mirroring manifests to manifests-my-index-1614985528 1 To upload local images to a registry, run: oc adm catalog mirror file://local/index/myrepo/my-index:v1 REGISTRY/REPOSITORY 2
This command creates a
v2/
directory in your current directory.-
Copy the
v2/
directory to removable media. - Physically remove the media and attach it to a host in the disconnected environment that has access to the mirror registry.
If your mirror registry requires authentication, run the following command on your host in the disconnected environment to log in to the registry:
$ podman login <mirror_registry>
Run the following command from the parent directory containing the
v2/
directory to upload the images from local files to the mirror registry:$ oc adm catalog mirror \ file://local/index/<repository>/<index_image>:<tag> \ 1 <mirror_registry>:<port>[/<repository>] \ 2 -a ${REG_CREDS} \ 3 --insecure \ 4 --index-filter-by-os='<platform>/<arch>' 5
- 1
- Specify the
file://
path from the previous command output. - 2
- Specify the fully qualified domain name (FQDN) for the target registry to mirror the Operator contents to. The mirror registry
<repository>
can be any existing repository, or namespace, on the registry, for exampleolm-mirror
as outlined in the prerequisites. If there is an existing repository found during mirroring, the repository name is added to the resulting image name. If you do not want the image name to include the repository name, omit the<repository>
value from this line, for example<mirror_registry>:<port>
. - 3
- Optional: If required, specify the location of your registry credentials file.
- 4
- Optional: If you do not want to configure trust for the target registry, add the
--insecure
flag. - 5
- Optional: Specify which platform and architecture of the index image to select when multiple variants are available. Images are specified as
'<platform>/<arch>[/<variant>]'
. This does not apply to images referenced by the index. Valid values arelinux/amd64
,linux/ppc64le
,linux/s390x
,linux/arm64
, and.*
NoteRed Hat Quay does not support nested repositories. As a result, running the
oc adm catalog mirror
command will fail with a401
unauthorized error. As a workaround, you can use the--max-components=2
option when running theoc adm catalog mirror
command to disable the creation of nested repositories. For more information on this workaround, see the Unauthorized error thrown while using catalog mirror command with Quay registry Knowledgebase Solution.Run the
oc adm catalog mirror
command again. Use the newly mirrored index image as the source and the same mirror registry target used in the previous step:$ oc adm catalog mirror \ <mirror_registry>:<port>/<index_image> \ <mirror_registry>:<port>[/<repository>] \ --manifests-only \1 [-a ${REG_CREDS}] \ [--insecure]
- 1
- The
--manifests-only
flag is required for this step so that the command does not copy all of the mirrored content again.
ImportantThis step is required because the image mappings in the
imageContentSourcePolicy.yaml
file generated during the previous step must be updated from local paths to valid mirror locations. Failure to do so will cause errors when you create theImageContentSourcePolicy
object in a later step.
After you mirror the catalog, you can continue with the remainder of your cluster installation. After your cluster installation has finished successfully, you must specify the manifests directory from this procedure to create the ImageContentSourcePolicy
and CatalogSource
objects. These objects are required to enable installation of Operators from OperatorHub.
Additional resources
3.7.3. Generated manifests
After mirroring Operator catalog content to your mirror registry, a manifests directory is generated in your current directory.
If you mirrored content to a registry on the same network, the directory name takes the following pattern:
manifests-<index_image_name>-<random_number>
If you mirrored content to a registry on a disconnected host in the previous section, the directory name takes the following pattern:
manifests-index/<repository>/<index_image_name>-<random_number>
The manifests directory name is referenced in subsequent procedures.
The manifests directory contains the following files, some of which might require further modification:
The
catalogSource.yaml
file is a basic definition for aCatalogSource
object that is pre-populated with your index image tag and other relevant metadata. This file can be used as is or modified to add the catalog source to your cluster.ImportantIf you mirrored the content to local files, you must modify your
catalogSource.yaml
file to remove any backslash (/
) characters from themetadata.name
field. Otherwise, when you attempt to create the object, it fails with an "invalid resource name" error.The
imageContentSourcePolicy.yaml
file defines anImageContentSourcePolicy
object that can configure nodes to translate between the image references stored in Operator manifests and the mirrored registry.NoteIf your cluster uses an
ImageContentSourcePolicy
object to configure repository mirroring, you can use only global pull secrets for mirrored registries. You cannot add a pull secret to a project.The
mapping.txt
file contains all of the source images and where to map them in the target registry. This file is compatible with theoc image mirror
command and can be used to further customize the mirroring configuration.ImportantIf you used the
--manifests-only
flag during the mirroring process and want to further trim the subset of packages to mirror, see the steps in the Mirroring a package manifest format catalog image procedure of the OpenShift Container Platform 4.7 documentation about modifying yourmapping.txt
file and using the file with theoc image mirror
command.
3.7.4. Postinstallation requirements
After you mirror the catalog, you can continue with the remainder of your cluster installation. After your cluster installation has finished successfully, you must specify the manifests directory from this procedure to create the ImageContentSourcePolicy
and CatalogSource
objects. These objects are required to populate and enable installation of Operators from OperatorHub.
3.8. Next steps
- Install a cluster on infrastructure that you provision in your restricted network, such as on VMware vSphere, bare metal, or Amazon Web Services.
3.9. Additional resources
- See Gathering data about specific features for more information about using must-gather.