nacos-k8s prometheus

nacos-k8s 部署在 k8s 上，并接入到 prometheus 接入之后效果如下：出现的问题就是 nacos-k8s 不能一键部署成功，会爆出各种错误，不稳定。生产持久化部署。必须要使用持久卷，否则会出现数据丢失的情况

Nacos 的自动扩容缩容需要依赖持久卷,以及数据持久化也是一样,本例中使用的是 NFS 来使用 PVC.

1. 部署 nfs-csi (storageclass) 这里采用的是 Qist 大佬的官方 yaml

nfs-StorageClass 部署

2. 设置 nacos 数据库，本人用的本地数据库(必须)

创建数据库 nacos-test,执行下面建表语句

3.部署 nacos

3.1 本人下载官方 yaml 后,自己有所改动，主要修改 StorageClass 对应的 nfs-csi 环境

3.2 修改 configmap（修改成你的数据库配置）

3.3 本人使用 yaml

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apiVersion: v1
kind: ServiceAccount
metadata:
  name: nfs-client-provisioner
---
apiVersion: v1
kind: Service
metadata:
  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
data:
  mysql.host: "192.168.0.20"
  mysql.db.name: "nacos_test"
  mysql.port: "3306"
  mysql.user: "shooter"
  mysql.password: "123456"
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: nacos
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"
      serviceAccountName: nfs-client-provisioner
      initContainers:
        - name: peer-finder-plugin-install
          image: nacos/nacos-peer-finder-plugin:1.1
          imagePullPolicy: Always
          volumeMounts:
            - mountPath: /home/nacos/plugins/peer-finder
              name: data
              subPath: peer-finder
      containers:
        - name: nacos
          imagePullPolicy: Always
          image: nacos/nacos-server:latest
          resources:
            requests:
              memory: "1Gi"
              cpu: "500m"
          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"
            - 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_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: NACOS_SERVER_PORT
              value: "8848"
            - name: NACOS_APPLICATION_PORT
              value: "8848"
            - name: PREFER_HOST_MODE
              value: "hostname"
            - name: MODE
              value: "cluster"
              #value: "standalone" #单节点模式切这个即可
            - name: NACOS_SERVERS
              value: "nacos-0.nacos-headless.default.svc.cluster.local:8848 nacos-1.nacos-headless.default.svc.cluster.local:8848 nacos-2.nacos-headless.default.svc.cluster.local:8848"
          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
  volumeClaimTemplates:
    - metadata:
        name: data
        annotations:
          volume.beta.kubernetes.io/storage-class: "nfs-csi"
      spec:
        accessModes: [ "ReadWriteMany" ]
        storageClassName: nfs-csi
        resources:
          requests:
            storage: 2Gi
  selector:
    matchLabels:
      app: nacos

3.4 查看日志看 nacos 是否启动

登入 nacos 界面查看如上图所示，可以看到节点正常，也可以通过 prometheus 查看是否正常节点正常采集。

nacos 开启 prometheus 采集