k8s集群部署nacos,采用的是 emptyDir 临时目录挂载

官方参考地址：https://nacos.io/zh-cn/docs/use-nacos-with-kubernetes.html

说明：

1、官网采用的nfs持久化部署

我将nacos持久化改成 emptyDir 临时目录挂载，同时又能满足自行调节nacos集群实例数。

2. emptyDir 临时目录挂载的nacos.yaml

cat  > nacos.yaml << EOF
# nacos.yaml 可调整 集群副本数 扩容
---
apiVersion: v1
kind: Service
metadata:
  name: nacos-headless
  labels:
    app: nacos
  annotations:
    service.alpha.kubernetes.io/tolerate-unready-endpoints: "true"
spec:
  ports:
    - port: 8848
      name: server
      targetPort: 8848
    - port: 9848
      name: client-rpc
      targetPort: 9848
    - port: 9849
      name: raft-rpc
      targetPort: 9849
    ## 兼容1.4.x版本的选举端口
    - port: 7848
      name: old-raft-rpc
      targetPort: 7848
  type: NodePort
  #clusterIP: None  #如果不暴露端口需要开启这个
  selector:
    app: nacos
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: nacos-cm
data:
  mysql.db.name: "nacos"
  mysql.port: "3306"
  mysql.user: "nacos"
  mysql.password: "nacos"
  mysql.host: "nacos"
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: nacos
spec:
  serviceName: nacos-headless
  replicas: 1
  template:
    metadata:
      labels:
        app: nacos
      annotations:
        pod.alpha.kubernetes.io/initialized: "true"
    spec:
      initContainers:
        - name: peer-finder-plugin-install
          image: nacos/nacos-peer-finder-plugin:1.1
          imagePullPolicy: IfNotPresent
          volumeMounts:
            - mountPath: /home/nacos/plugins/peer-finder
              name: data
              subPath: peer-finder
      containers:
        - name: nacos
          image: nacos/nacos-server:latest
          imagePullPolicy: IfNotPresent
          ports:
            - containerPort: 8848
              name: client-port
            - containerPort: 9848
              name: client-rpc
            - containerPort: 9849
              name: raft-rpc
            - containerPort: 7848
              name: old-raft-rpc
          env:
            - name: NACOS_REPLICAS
              value: "3"
 
          # 若是使用单实例部署 nacos ,需要设置： MODE=standalone
          #  - name: MODE  ## 系统启动方式: 集群/单机; cluster/standalone默认 cluster 
          #    value: standalone
 
            - name: SERVICE_NAME
              value: "nacos-headless"
            - name: DOMAIN_NAME
              value: "cluster.local"
            - name: POD_NAMESPACE
              valueFrom:
                fieldRef:
                  apiVersion: v1
                  fieldPath: metadata.namespace
            - name: MYSQL_SERVICE_DB_NAME
              valueFrom:
                configMapKeyRef:
                  name: nacos-cm
                  key: mysql.db.name
            - name: MYSQL_SERVICE_PORT
              valueFrom:
                configMapKeyRef:
                  name: nacos-cm
                  key: mysql.port
            - name: MYSQL_SERVICE_USER
              valueFrom:
                configMapKeyRef:
                  name: nacos-cm
                  key: mysql.user
            - name: MYSQL_SERVICE_HOST
              valueFrom:
                configMapKeyRef:
                  name: nacos-cm
                  key: mysql.host
            - name: MYSQL_SERVICE_PASSWORD
              valueFrom:
                configMapKeyRef:
                  name: nacos-cm
                  key: mysql.password
            - name: NACOS_SERVER_PORT
              value: "8848"
            - name: NACOS_APPLICATION_PORT
              value: "8848"
            - name: PREFER_HOST_MODE
              value: "hostname"
          volumeMounts:
            - name: data
              mountPath: /home/nacos/plugins/peer-finder
              subPath: peer-finder
#            - name: data
#              mountPath: /home/nacos/data
#              subPath: data
#            - name: data
#              mountPath: /home/nacos/logs
#              subPath: logs
 
#   将 nacos 持久化改成 非持久化方式；官网使用的是 StorageClass 方式，需要依赖nfs等共享存储，以及共享存储插件实现
      volumes:
        - name: data
          emptyDir: {}
  selector:
    matchLabels:
      app: nacos
EOF
      

docker pull  nacos/nacos-peer-finder-plugin:1.1      
docker pull  nacos/nacos-server:latest
kubectl apply -f nacos.yaml

3.登录验证

kubectl get pods,svc  #查看暴露端口

root@k8s-master:~# kubectl get pods,svc
NAME          READY   STATUS    RESTARTS   AGE
pod/nacos-0   1/1     Running   0          8m12s

NAME                     TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)                                                       AGE
service/kubernetes       ClusterIP   10.96.0.1      <none>        443/TCP                                                       106d
service/nacos-headless   NodePort    10.104.86.31   <none>        8848:30719/TCP,9848:31354/TCP,9849:31262/TCP,7848:32512/TCP   13m
root@k8s-master:~# 

浏览器访问： IP:端口/nacos 我这里是http://49.0.241.2:30719/nacos/

账号和密码默认都是nacos