k8s 安装笔记 - 部署Nacos服务 - 单节点服务

安装步骤参考地址

kubernetes(k8s)部署nacos集群/单机服务问题k8s nacos绘码先生的博客-CSDN博客

创建pv - 外挂存储 hostPath方式

apiVersion: v1
kind: PersistentVolume
metadata:
  name: pv-volume-nacos
  namespace: devops
  labels:
    type: local
spec:
  storageClassName: manual-nacos
  capacity:
    storage: 1Gi
  accessModes:
    - ReadWriteOnce
  hostPath:
    path: "/data/pv/nacos"

---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: pv-claim-nacos
  namespace: devops
spec:
  storageClassName: manual-nacos
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi

单节点方式Yaml配置内容

配置文件

apiVersion: v1
kind: ConfigMap
metadata:
  name: nacos-cm
  namespace: devops
data:
  mysql.host: "mysql-master-svc"
  mysql.db.name: "nacos_data"
  mysql.port: "3306"
  mysql.user: "nacos"
  mysql.password: "123456"

启动服务配置

apiVersion: v1
kind: Service
metadata:
  namespace: devops
  name: nacos-svc
  labels:
    app: nacos-svc
spec:
  type: NodePort
  ports:
    - port: 8848
      name: server-regist
      targetPort: 8848
      nodePort: 30005
    - port: 9848  # 必须开放出去，否则开发和互联网环境无法访问，这个是rpc 服务调用，程序默认 端口 偏移 1000 
      name: server-grpc
      targetPort: 9848
      nodePort: 31005 
    - port: 9849  # 必须开放出去，否则开发和互联网环境无法访问，这个是rpc 服务调用，程序默认 端口 偏移 1000 
      name: server-grpc-sync
      targetPort: 9849
      nodePort: 32005
  selector:
    app: nacos-standalone

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nacos-standalone
  namespace: devops
spec:
  #单机模式设置大于1个副本,注册的时候会分配到不同的副本上,web登录查看注册列表的时候,
  #只能看到其中一个副本的注册服务,刷新web网页可切换不同的副本,查看到其注册的服务,也就是注册的服务被副本分摊了
  #所以这里多个副本就出现了和集群模式一样的现象了,就是注册服务被注册到不同的nacos上了,需要刷新web页面来访问到
  #不同的nacos服务来查看其注册的服务有哪些,也就是只有一个副本的时候,注册的服务才会全部能看到
  replicas: 1
  template:
    metadata:
      labels:
        app: nacos-standalone
      annotations:
        pod.alpha.kubernetes.io/initialized: "true"
    spec:
      affinity:
        podAntiAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            - labelSelector:
                matchExpressions:
                  - key: "app"
                    operator: In
                    values:
                      - nacos-standalone
              topologyKey: "kubernetes.io/hostname"
      volumes:
      - name: nacos-volume
        # 使用pvc
        persistentVolumeClaim:
          claimName: pv-claim-nacos
      containers:
        - name: local-nacos
          imagePullPolicy: Always
          image: nacos/nacos-server:2.2.0
          #资源不足时,这先不做设置,让其自动分配
          #resources:
          #  requests:
          #    memory: "1Gi"
          #    cpu: "100m"
            volumeMounts:
            - name: nacos-volume
              mountPath: /home/nacos
          ports:
            - containerPort: 8848
              name: client
            - containerPort: 9848
              name: client-rpc
            - containerPort: 9849
              name: raft-rpc
            - containerPort: 7848
              name: old-raft-rpc
          env:
              #设置使用mysql存储,默认是嵌入式存储
            - name: SPRING_DATASOURCE_PLATFORM
              value: "mysql"
            - name: MYSQL_SERVICE_HOST
              valueFrom:
                configMapKeyRef:
                  name: nacos-cm
                  key: mysql.host
            - 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_PASSWORD
              valueFrom:
                configMapKeyRef:
                  name: nacos-cm
                  key: mysql.password
            - name: MODE
              value: "standalone"
            - name: NACOS_SERVER_PORT
              value: "8848"
            - name: PREFER_HOST_MODE
              value: "hostname"
  selector:
    matchLabels:
      app: nacos-standalone

单节点配置结果

http://123.56.66.204:30005
账户名称：nacos
账户密码：Exiaokang2021

集群Cluster方式yaml配置内容

###使用自建数据库；使用Ingress发布配置后台###
---
apiVersion: v1
kind: Service
metadata:
  namespace: devops
  name: nacos-headless
  labels:
    app: nacos-headless
spec:
  type: ClusterIP
  clusterIP: None
  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
  selector:
    app: nacos
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: nacos-cm
  namespace: devops
data:
  #这里mysql也是使用k8s部署,使用service名称和端口
  mysql.host: "mysql-master-svc"
  mysql.db.name: "nacos_data"
  mysql.port: "3306"
  mysql.user: "nacos"
  mysql.password: "123456"
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: nacos
  namespace: devops
spec:
  serviceName: nacos-headless
  replicas: 3
  template:
    metadata:
      labels:
        app: nacos
      annotations:
        pod.alpha.kubernetes.io/initialized: "true"
    spec:
      affinity:
        podAntiAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            - labelSelector:
                matchExpressions:
                  - key: "app"
                    operator: In
                    values:
                      - nacos
              topologyKey: "kubernetes.io/hostname"
      containers:
        - name: k8snacos
          imagePullPolicy: Always
          image: nacos/nacos-server:1.4.1
          resources:
            requests:
              memory: "1Gi"
              cpu: "100m"
          ports:
            - containerPort: 8848
              name: client
            - containerPort: 9848
              name: client-rpc
            - containerPort: 9849
              name: raft-rpc
            - containerPort: 7848
              name: old-raft-rpc
          env:
            - name: NACOS_REPLICAS
              value: "3"
            - name: MYSQL_SERVICE_HOST
              valueFrom:
                configMapKeyRef:
                  name: nacos-cm
                  key: mysql.host
            - 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_PASSWORD
              valueFrom:
                configMapKeyRef:
                  name: nacos-cm
                  key: mysql.password
            - name: MODE
              value: "cluster"
            - name: NACOS_SERVER_PORT
              value: "8848"
            - name: PREFER_HOST_MODE
              value: "hostname"
            - name: NACOS_SERVERS
              value: "nacos-0.nacos-headless.mall.svc.cluster.local:8848 nacos-1.nacos-headless.mall.svc.cluster.local:8848 nacos-2.nacos-headless.mall.svc.cluster.local:8848"
  selector:
    matchLabels:
      app: nacos