Karmada 部署与使用体验

初始化 karmada 控制平面

kubectl krew install karmada
kubectl karmada init --kube-image-registry='registry.cn-hangzhou.aliyuncs.com/google_containers'

查看 karmada 控制平面创建的资源

kubectl get deployments -n karmada-system
kubectl get statefulsets -n karmada-system

将 karmada 控制平面增加到当前主机的 kubeconfig 认证上下文中并切换到 karmada 控制平面

kubecm add -f /etc/karmada/karmada-apiserver.config
kubectl ctx karmada-apiserver

将 Kubernetes 集群注册到 Karmada 控制平面

kubectl karmada join member1 --cluster-kubeconfig=$HOME/.kube/config --cluster-context='kubernetes-admin@kubernetes'
kubectl karmada join member2 --cluster-kubeconfig=$HOME/.kube/config --cluster-context='cluster2'

查看注册的集群

kubectl get clusters

准备应用 deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx
  labels:
    app: nginx
spec:
  replicas: 2
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - image: nginx
        name: nginx

将 yaml 应用到 karmada 控制面板

kubectl apply -f deployment.yaml

准备应用多集群部署传播策略 propagationpolicy.yaml

apiVersion: policy.karmada.io/v1alpha1
kind: PropagationPolicy
metadata:
  name: nginx-propagation
spec:
  resourceSelectors:
    - apiVersion: apps/v1
      kind: Deployment
      name: nginx
  placement:
    clusterAffinity:
      clusterNames:
        - member1
        - member2
    replicaScheduling:
      replicaDivisionPreference: Weighted
      replicaSchedulingType: Divided
      weightPreference:
        staticWeightList:
          - targetCluster:
              clusterNames:
                - member1
            weight: 1
          - targetCluster:
              clusterNames:
                - member2
            weight: 1

将 yaml 应用到 karmada 控制面板

kubectl apply -f propagationpolicy.yaml

联邦注销与清理

kubectl karmada unjoin member1
kubectl karmada unjoin member1
kubectl karmada uninit