EVEREST-1182 fix install of everest operator (#461)

* EVEREST-1182 fix install of everest operator

We introduced this phase check because OLM has a bug where it sometimes
creates duplicate InstallPlans for the same CSV and we found a few cases
where the duplicate InstallPlan wasn't reconciled correctly and
abandoned by OLM. This abandoned InstallPlan was missing the status
field meaning it was also missing the necessary plan to install the
operator. Approving this InstallPlan would cause the operator to never
be installed. By checking the phase we make sure we will be approving an
InstallPlan that is actually ready to be approved. See
operator-framework/kubectl-operator#13 for
more details on a similar issue.

* EVEREST-1182 fix idempotency of the install command

pkg/kubernetes/kubernetes.go

@@ -586,7 +586,22 @@ func (k *Kubernetes) getTargetInstallPlanName(ctx context.Context, subscription
 	}
 	for _, ip := range ipList.Items {
 		for _, csv := range ip.Spec.ClusterServiceVersionNames {
-			if csv == targetCSV {
+			// If the CSV is the one we are looking for and the InstallPlan is
+			// waiting for approval, we return it.
+			// We introduced this phase check because OLM has a bug where it
+			// sometimes creates duplicate InstallPlans for the same CSV and we
+			// found a few cases where the duplicate InstallPlan wasn't
+			// reconciled correctly and abandoned by OLM. This abandoned
+			// InstallPlan was missing the status field meaning it was also
+			// missing the necessary plan to install the operator. Approving
+			// this InstallPlan would cause the operator to never be installed.
+			// By checking the phase we make sure we will be approving an
+			// InstallPlan that is actually ready to be approved.
+			// See https://github.com/operator-framework/kubectl-operator/issues/13
+			// for more details on a similar issue.
+			// We also need to return the InstallPlan if the Phase is Complete
+			// to ensure the idempotency of the InstallOperator function.
+			if csv == targetCSV && (ip.Status.Phase == olmv1alpha1.InstallPlanPhaseRequiresApproval || ip.Status.Phase == olmv1alpha1.InstallPlanPhaseComplete) {
 				return ip.GetName(), nil
 			}
 		}