Installing Operator Lifecycle Manager (OLM) to deploy the Db2 Operator

Operator Lifecycle Manager (OLM) is an open source toolkit to manage Kubernetes Operators. OLM extends Kubernetes to provide a declarative method for installing, managing, and updating operators within a cluster environment. You must install OLM to run the Db2 Operator.

Procedure

To install Operator Lifecycle Manager (OLM):

Create the OLM namespace:
```
kubectl create namespace olm
```

Install the OLM in your cluster:

curl -sL https://github.com/operator-framework/operator-lifecycle-manager/releases/download/v0.20.0/install.sh | bash -s v0.20.0

Check for pods in the OLM namespace and wait for the pods to be in a ready state:
```
kubectl get pods -n olm
```

Install the ibm-db2uoperator-catalog in the OLM namespace:

cat << EOF | kubectl create -f -
apiVersion: operators.coreos.com/v1alpha1
kind: CatalogSource
metadata:
  name: ibm-db2uoperator-catalog
  namespace: olm
spec:
  displayName: IBM Db2U Catalog
  image: icr.io/cpopen/ibm-db2uoperator-catalog@sha256:619915e9ceb695bfc84f91b87c8c1791bcec2c2db576fe84cd2ff65e513adda4
  publisher: IBM
  sourceType: grpc
  updateStrategy:
    registryPoll:
      interval: 45m
EOF

Check for db2uoperator catalog pods in the ibm-db2uoperator-catalog and wait for the pods to be in a ready state:
```
kubectl get pods -n olm
```

Set the namespace variable:

export NAMESPACE=<namespace to deploy db2u>

Create a namespace for installing the Db2 Operator.
```
kubectl create namespace ${NAMESPACE}
```

Install an operator group in the namespace:

cat << EOF | kubectl create -f -
apiVersion: operators.coreos.com/v1
kind: OperatorGroup
metadata:
  name: db2u-operator-group
  namespace: ${NAMESPACE}
spec:
  targetNamespaces:
  - ${NAMESPACE}
EOF

Create a subscription in the namespace to deploy the Db2 Operator:

cat << EOF | kubectl create -f -
apiVersion: operators.coreos.com/v1alpha1
kind: Subscription
metadata:
  name: ibm-db2uoperator-catalog-subscription
  namespace: ${NAMESPACE}
  generation: 1
spec:
  channel: v120102.0
  name: db2u-operator
  installPlanApproval: Automatic
  source: ibm-db2uoperator-catalog
  sourceNamespace: olm
  startingCSV: db2u-operator.v120102.0.1
EOF

Confirm that the db2u-operator pod is deployed:

kubectl get pods -n ${NAMESPACE} | grep db2u-operator