OpenShift Ambient Mesh Setup

Pre-requisites
- Verify cluster auth status
- Upgrade cluster
Install service mesh operator

This is a short demonstration of Istio Ambient Mesh on OpenShift 4.19 via the OpenShift Service Mesh operator.

Pre-requisites

Before we begin, let's ensure we are logged into our cluster in the terminal and the cluster meets our version requirements.

Verify cluster auth status

oc version && oc whoami

Upgrade cluster

The Red Hat demo system environment available was not yet running OpenShift 4.19 so I needed to upgrade it before performing any demo preparation steps.

The first step is to acknowledge the k8s api deprecations between 4.18 and 4.19.

oc -n openshift-config patch cm admin-acks --patch '{"data":{"ack-4.18-kube-1.32-api-removals-in-4.19":"true"}}' --type=merge

Once admin acks are in place we can set the upgrade channel to fast-.419.

oc adm upgrade channel fast-4.19

Now we're ready to trigger the upgrade.

oc adm upgrade --to 4.19.9

Before proceeding with any further steps let's wait for the cluster upgrade to complete.

oc adm wait-for-stable-cluster

Install service mesh operator

Our first step to prepare the demonstration is to install the service mesh operator.

cat << EOF | oc apply --filename -
apiVersion: operators.coreos.com/v1alpha1
kind: Subscription
metadata:
  name: servicemeshoperator3
  namespace: openshift-operators
spec:
  channel: stable
  installPlanApproval: Automatic
  name: servicemeshoperator3
  source: redhat-operators
  sourceNamespace: openshift-marketplace
EOF