Install your operator with OLM

Once you have a catalog of operators loaded onto the cluster via a CatalogSource, you can install your operator by creating a Subscription to a specific channel.

Prerequisites

Before installing an operator into a namespace, you will need to create an OperatorGroup that targets the namespaces your operator is planning to watch, to generate the required RBACs for your operator in those namespaces. You can read more about OperatorGroup here.

Note: The namespaces targeted by the OperatorGroup must align with the installModes specified in the ClusterServiceVersion of the operator’s package. To know the installModes of an operator, inspect the packagemanifest:

kubectl get packagemanifest <operator-name> -o jsonpath="{.status.channels[0].currentCSVDesc.installModes}"

Note: This document uses a global OperatorGroup in the examples to install operators. To learn more about installing namespaced scoped operators, check out operator scoping with OperatorGroups.

Install your operator

To install an Operator, simply create a Subscription for your operator. This represents the intent to subscribe to a stream of available versions of this Operator from a CatalogSource:

apiVersion: operators.coreos.com/v1alpha1
kind: Subscription
metadata:
  name: <name-of-your-subscription>
  namespace: <namespace-you-want-your-operator-installed-in>
spec:
  channel: <channel-you-want-to-subscribe-to>
  name: <name-of-your-operator>
  source: <name-of-catalog-operator-is-part-of>
  sourceNamespace: <namespace-that-has-catalog>
  installPlanApproval: <Automatic/Manual>

You can read more about the Subscription object and what the different fields mean here.

The Subscription object creates an InstallPlan, which is either automatically approved (if sub.spec.installPlanApproval: Automatic), or needs to be approved (if sub.spec.installPlanApproval: Manual), following which the operator is installed in the namespace you want.

Example: Install the latest version of an Operator

If you want to install an operator named my-operator in the namespace foo that is cluster scoped (i.e installModes:AllNamespaces), from a catalog named my-catalog that is in the namespace olm, and you want to subscribe to the channel stable,

create a global OperatorGroup (which selects all namespaces):

$ cat og.yaml

  apiVersion: operators.coreos.com/v1
  kind: OperatorGroup
  metadata:
    name: my-group
    namespace: foo

$ kubectl apply -f og.yaml
  operatorgroup.operators.coreos.com/my-group created

Then, create a subscription for the operator:

$ cat sub.yaml

apiVersion: operators.coreos.com/v1alpha1
kind: Subscription
metadata:
  name: sub-to-my-operator
  namespace: foo
spec:
  channel: stable
  name: my-operator
  source: my-catalog
  sourceNamespace: olm
  installPlanApproval: Manual

$ kubectl apply -f sub.yaml
subscription.operators.coreos.com/sub-to-my-operator created

Since installPlanApproval is set to Manual, we need to manually go in and approve the InstallPlan

$ kubectl get ip -n foo

NAME            CSV                   APPROVAL    APPROVED
install-nlwcw   my-operator.v0.9.2   Automatic     false

$ kubectl edit ip install-nlwcw -n foo

And then change the spec.approved from false to true.

This should spin up the ClusterServiceVersion of the operator in the foo namespace, following which the operator pod will spin up.

To ensure the operator installed successfully, check for the ClusterServiceVersion and the operator deployment in the namespace it was installed in.

$ kubectl get csv -n <namespace-operator-was-installed-in>

NAME                  DISPLAY          VERSION           REPLACES              PHASE
<name-of-csv>     <operator-name>     <version>  <csv-of-previous-version>   Succeeded
...
$ kubectl get deployments -n <namespace-operator-was-installed-in>
NAME                         READY   UP-TO-DATE   AVAILABLE   AGE
<name-of-your-operator>      1/1     1            1           9m48s

If the ClusterServiceVersion fails to show up or does not reach the Succeeded phase, please check the troubleshooting documentation to debug your installation.

Example: Install a specific version of an Operator

If you want to install a particular version of your Operator, specify the startingCSV property in your Subscription like so:

apiVersion: operators.coreos.com/v1alpha1
kind: Subscription
metadata:
  name: sub-to-my-operator
  namespace: foo
spec:
  channel: stable
  name: my-operator
  source: my-catalog
  sourceNamespace: olm
  installPlanApproval: Manual
  startingCSV: 1.1.0

Notice that approval has been set to Manual as well in order to keep OLM from immediately updating your Operator, if 1.1.0 happens to be superseded by a newer version in my-catalog. Follow the instructions from the previous example to approve the initial InstallPlan for this Subscription, so 1.1.0 is allowed to be installed.

If your intent is to pin an installed Operator to the particular version 1.1.0 you don’t need to do anything. After approving the initial InstallPlan OLM will install version 1.1.0 of your Operator and keep it at that version. When updates are discovered in the catalog, OLM will wait not proceed unless you manual approve the update.