Install Rollout Plugin

To support Kurator’s Rollout, it’s imperative to first configure the Rollout plugin for Fleet. This guide will walk you through configuring the Flagger-based rollout plugin for Fleet, laying the groundwork for Kurator’s Rollout capabilities.

Prerequisites

1. Fleet Manager Setup

Set up the Fleet manager by following the instructions in the installation guide.

2. Secrets and Setup for Attached Clusters

kubectl create secret generic kurator-member1 --from-file=kurator-member1.config=/root/.kube/kurator-member1.config
kubectl create secret generic kurator-member2 --from-file=kurator-member2.config=/root/.kube/kurator-member2.config
---
kubectl apply -f - <<EOF
apiVersion: cluster.kurator.dev/v1alpha1
kind: AttachedCluster
metadata:
  name: kurator-member1
  namespace: default
spec:
  kubeconfig:
    name: kurator-member1
    key: kurator-member1.config
---
apiVersion: cluster.kurator.dev/v1alpha1
kind: AttachedCluster
metadata:
  name: kurator-member2
  namespace: default
spec:
  kubeconfig:
    name: kurator-member2
    key: kurator-member2.config
EOF

Create a Fleet with the Rollout Plugin Enabled

Run following command to create Flagger in the Fleet:

kubectl apply -f -<<EOF
apiVersion: fleet.kurator.dev/v1alpha1
kind: Fleet
metadata:
  name: quickstart
  namespace: default
spec:
  clusters:
    - name: kurator-member1
      kind: AttachedCluster
    - name: kurator-member2
      kind: AttachedCluster
  plugin:
    flagger:
      publicTestloader: true
      trafficRoutingProvider: istio
EOF

Fleet Rollout Plugin Configuration Explained

Let’s delve into the spec section of the above Fleet:

• clusters: Contains the two AttachedCluster objects created earlier, indicating that the Rollout plugin will be installed on these two clusters.

• plugin: The flagger indicates the description of a Rollout plugin. It contains configurations for whether to install publicTestloader and trafficRoutingProvider.

  • publicTestloader: Indicates whether to install a common test loader to generate test traffic for application services.
  • trafficRoutingProvider: Traffic Routing Provider. Currently it only supports Istio, in the future it will add support for other service meshes or ingress controllers. For example, Linkerd, Gloo, Nginx etc.

For more configuration information, please refer to the Fleet API.

Verify the Installation

To ensure that the Rollout plugin is successfully installed and running.

Run the following commands:

kubectl get pod -n istio-system --kubeconfig=/root/.kube/kurator-member1.config
kubectl get pod -n istio-system --kubeconfig=/root/.kube/kurator-member2.config

Initially, you should observe:

istio-system-flagger-kurator-member1-649c65bd7d-ptgbj             1/1     Running   0          2m21s
istio-system-testloader-kurator-member1-loadtester-7ff7d75grwsh   1/1     Running   0          2m21s

Cleanup

This section guides you through the process of cleaning up the fleets and plugins.

1. Cleanup the Rollout Plugin

If you only need to remove the Rollout plugin, simply edit the current fleet and remove the corresponding description:

kubectl edit fleet.fleet.kurator.dev quickstart

To check the results of the deletion, you can observe that the Flagger components have been removed:

kubectl get po -A --kubeconfig=/root/.kube/kurator-member1.config
kubectl get po -A --kubeconfig=/root/.kube/kurator-member2.config

If you wish to reinstall the components later, you can simply edit the fleet and add the necessary configurations.

2. Cleanup the Fleet

When the fleet is deleted, all associated plugins will also be removed:

kubectl delete fleet.fleet.kurator.dev quickstart

3. Cleanup the fleet-manager (optional)

Run the following commands to delete fleet-manager and cluster-operator:

helm uninstall kurator-cluster-operator -n kurator-system
helm uninstall kurator-fleet-manager -n kurator-system

Run the following commands to delete Fluxcd:

helm delete fluxcd -n fluxcd-system
kubectl delete ns fluxcd-system --ignore-not-found