Add a Catalog of Extensions to a Cluster

Extension authors can publish their products in catalogs. ClusterCatalogs are curated collections of Kubernetes extensions, such as Operators. Cluster administrators can add these ClusterCatalogs to their cluster. Cluster administrators can enable polling to get over-the-air updates to ClusterCatalogs when extension authors publish changes such as bug fixes and new features.

For example, the Kubernetes community Operators catalog is a catalog of curated extensions that is developed by the Kubernetes community. You can see the available extensions at Operatorhub.io. This catalog is distributed as an image quay.io/operatorhubio/catalog that can be installed on clusters.

Prerequisites

Access to a Kubernetes cluster, for example kind, using an account with cluster-admin permissions
Operator Controller installed on the cluster
Catalogd installed on the cluster
Kubernetes CLI (kubectl) installed on your workstation

Procedure

Create a catalog custom resource (CR):

clustercatalog_cr.yaml

apiVersion: olm.operatorframework.io/v1alpha1
kind: ClusterCatalog
metadata:
  name: operatorhubio
spec:
  source:
    type: Image
    image:
      ref: <catalog_image>
      pollInterval: <poll_interval_duration>

catalog_name: Specifies the image reference for the catalog you want to install, such as quay.io/operatorhubio/catalog:latest.
poll_interval_duration: Specifies the interval for polling the remote registry for newer image digests. The default value is 24h. Valid units include seconds (s), minutes (m), and hours (h). To disable polling, set a zero value, such as 0s.

Example `operatorhubio.yaml` CR

apiVersion: olm.operatorframework.io/v1alpha1
kind: ClusterCatalog
metadata:
  name: operatorhub
spec:
  source:
    type: Image
    image:
      ref: quay.io/operatorhubio/catalog:latest
      pollInterval: 10m

Apply the ClusterCatalog CR:

kubectl apply -f <clustercatalog_cr>.yaml

Example output

clustercatalog.olm.operatorframework.io/operatorhubio created

Verification

Run the following commands to verify the status of your catalog:

Check if your catalog is available on the cluster:

kubectl get clustercatalog

Example output

NAME           LASTUNPACKED   AGE
operatorhubio  9m31s          9m55s

Check the status of your catalog:

kubectl describe clustercatalog

Example output

Name:         operatorhubio
Namespace:
Labels:       olm.operatorframework.io/metadata.name=operatorhubio
Annotations:  <none>
API Version:  olm.operatorframework.io/v1alpha1
Kind:         ClusterCatalog
Metadata:
Creation Timestamp:  2024-10-02T19:51:24Z
Finalizers:
    olm.operatorframework.io/delete-server-cache
Generation:        1
Resource Version:  33321
UID:               52894532-0646-41a5-8285-c7f48bba49e4
Spec:
  Priority:  0
  Source:
    Image:
      Poll Interval:  10m0s
      Ref:            quay.io/operatorhubio/catalog:latest
    Type:             Image
Status:
  Conditions:
    Last Transition Time:  2024-03-12T19:35:34Z
    Message:               Successfully unpacked and stored content from resolved source
    Observed Generation:   2
    Reason:                Succeeded
    Status:                False
    Type:                  Progressing
    Last Transition Time:  2024-03-12T19:35:34Z
    Message:               Serving desired content from resolved source
    Observed Generation:   2
    Reason:                Available
    Status:                True
    Type:                  Serving
  URLs:
    Base:                  https://catalogd-server.olmv1-system.svc/catalogs/operatorhubio
  Last Unpacked:           2024-03-12T19:35:34Z
  Resolved Source:
    Image:
      Last Successful Poll Attempt:  2024-03-12T19:35:26Z
      Ref:                           quay.io/operatorhubio/catalog@sha256:dee29aaed76fd1c72b654b9bc8bebc4b48b34fd8d41ece880524dc0c3c1c55ec
    Type:                            Image
Events:                              <none>