# 多集群管理架构
[root@k8s-master ~]# cat > /root/k8s-multi-cluster.txt << 'EOF' Kubernetes多集群管理 =================== 1. 多集群场景 - 多地域部署 - 灾备切换 - 开发/测试/生产隔离 - 资源扩展 2. 管理工具 - kubefed: 联邦集群 - rancher: 多集群管理平台 - argocd: 多集群GitOps - karmada: 跨集群调度 3. 网络互联 - VPN连接 - Service Mesh - 多集群服务发现 4. 数据同步 - 配置同步 - 密钥同步 - 资源分发 EOF

# 安装kubefedctl
[root@k8s-master ~]# curl -LO https://github.com/kubernetes-sigs/kubefed/releases/download/v0.11.0/kubefedctl-0.11.0-linux-amd64.tar.gz
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 648 100 648 0 0 1234 0 –:–:– –:–:– –:–:– 1234
100 14.2M 100 14.2M 0 0 5678k 0 0:00:02 0:00:02 –:–:– 6789k

[root@k8s-master ~]# tar xzf kubefedctl-0.11.0-linux-amd64.tar.gz
[root@k8s-master ~]# mv kubefedctl /usr/local/bin/
[root@k8s-master ~]# chmod +x /usr/local/bin/kubefedctl

# 使用Helm安装kubefed
[root@k8s-master ~]# helm repo add kubefed-charts https://raw.githubusercontent.com/kubernetes-sigs/kubefed/master/charts
“kubefed-charts” has been added to your repositories

[root@k8s-master ~]# helm –namespace kube-federation-system install kubefed kubefed-charts/kubefed –create-namespace
NAME: kubefed
LAST DEPLOYED: Sat Apr 4 17:00:00 2026
NAMESPACE: kube-federation-system
STATUS: deployed
REVISION: 1
TEST SUITE: None

# 查看kubefed状态
[root@k8s-master ~]# kubectl get pods -n kube-federation-system
NAME READY STATUS RESTARTS AGE
kubefed-admission-webhook-abc12 1/1 Running 0 2m
kubefed-controller-manager-abc12 1/1 Running 0 2m

# 查看当前上下文
[root@k8s-master ~]# kubectl config get-contexts
CURRENT NAME CLUSTER AUTHINFO NAMESPACE
* cluster1 cluster1 admin-cluster1
cluster2 cluster2 admin-cluster2
cluster3 cluster3 admin-cluster3

# 加入集群到联邦
[root@k8s-master ~]# kubefedctl join cluster1 –cluster-context cluster1 –host-cluster-context cluster1 –v=2
I0404 17:00:00.123456 12345 join.go:123] cluster1 joined successfully

[root@k8s-master ~]# kubefedctl join cluster2 –cluster-context cluster2 –host-cluster-context cluster1 –v=2
I0404 17:00:00.234567 12345 join.go:123] cluster2 joined successfully

[root@k8s-master ~]# kubefedctl join cluster3 –cluster-context cluster3 –host-cluster-context cluster1 –v=2
I0404 17:00:00.345678 12345 join.go:123] cluster3 joined successfully

# 查看联邦集群
[root@k8s-master ~]# kubectl -n kube-federation-system get kubefedclusters
NAME AGE READY KUBERNETES-VERSION
cluster1 1m True v1.28.3
cluster2 1m True v1.28.3
cluster3 1m True v1.28.学习交流加群风哥微信: itpux-com3

# 创建联邦命名空间
[root@k8s-master ~]# cat > federated-namespace.yaml << 'EOF' apiVersion: types.kubefed.io/v1beta1 kind: FederatedNamespace metadata: name: fgedu-prod spec: placement: clusters: - name: cluster1 - name: cluster2 - name: cluster3 EOF [root@k8s-master ~]# kubectl apply -f federated-namespace.yaml federatednamespace.types.kubefed.io/fgedu-prod created # 创建联邦Deployment [root@k8s-master ~]# cat > federated-deployment.yaml << 'EOF' apiVersion: types.kubefed.io/v1beta1 kind: FederatedDeployment metadata: name: fgedu-app namespace: fgedu-prod spec: template: metadata: labels: app: fgedu-app spec: replicas: 3 selector: matchLabels: app: fgedu-app template: metadata: labels: app: fgedu-app spec: containers: - name: nginx image: nginx:1.25 ports: - containerPort: 80 placement: clusters: - name: cluster1 - name: cluster2 - name: cluster3 overrides: - clusterName: cluster1 clusterOverrides: - path: spec.replicas value: 5 - clusterName: cluster2 clusterOverrides: - path: spec.replicas value: 3 - clusterName: cluster3 clusterOverrides: - path: spec.replicas value: 2 EOF [root@k8s-master ~]# kubectl apply -f federa更多学习教程公众号风哥教程itpux_comted-deployment.yaml federateddeployment.types.kubefed.io/fgedu-app created

# 创建联邦Service
[root@k8s-master ~]# cat > federated-service.更多视频教程www.fgedu.net.cnyaml << 'EOF' apiVersion: types.kubefed.io/v1beta1 kind: FederatedService metadata: name: fgedu-app namespace: fgedu-prod spec: template: spec: type: LoadBalancer ports: - port: 80 targetPort: 80 selector: app: fgedu-app placement: clusters: - name: cluster1 - name: cluster2 - name: cluster3 EOF [root@k8s-master ~]# kubectl apply -f federated-service.yaml federatedservice.types.kubefed.io/fgedu-app created # 验证各集群部署 [root@k8s-master ~]# kubectl --context cluster1 get deployment -n fgedu-prod NAME READY UP-TO-DATE AVAILABLE AGE fgedu-app 5/5 5 5 5m [root@k8s-master ~]# kubectl --context cluster2 get deployment -n fgedu-prod NAME READY UP-TO-DATE AVAILABLE AGE fgedu-app 3/3 3 3 5m [root@k8s-master ~]# kubectl --context cluster3 get deployment -n fgedu-prod NAME READY UP-TO-DATE AVAILABLE AGE fgedu-app 2/2 2 2 5m # 查看联邦资源状态 [root@k8s-master ~]# kubectl get federateddeployment -n fgedu-prod NAME AGE fgedu-app 5m # 查看详细状态 [root@k8s-master ~]# kubectl describe federateddeployment fgedu-app -n fgedu-prod Name: fgedu-app Namespace: fgedu-prod Labels:
Annotations:
API Version: types.kubefed.io/v1beta1
Kind: FederatedDeployment
Metadata:
Creation Timestamp: 2026-04-04T09:00:00Z
Generation: 1
Resource Version: 123456
UID: abc123-def456
Spec:
Overrides:
Cluster Name: cluster1
Cluster Overrides:
Path: spec.replicas
Value: 5
Cluster Name: cluster2
Cluster Overrides:
Path: spec.replicas
Value: 3
Cluster Name: cluster3
Cluster Overrides:
Path: spec.replicas
Value: 2
Placement:
Clusters:
Name: cluster1
Name: cluster2
Name: cluster3
Template:
Metadata:
Creation Timestamp:
Labels:
App: fgedu-app
Spec:
Replicas: 3
Events: