k8s 搭建etcd集群（业务调用非k8s集群）—— 筑梦之路

直接上yaml文件

#etcd-cluster-cm.yaml

apiVersion: v1
kind: ConfigMap
metadata:
  name: etcd-cm
  namespace: merry
data:
  ETCD_ROOT_PASSWORD: "admin123"

#etcd-cluster-deploy.yaml

apiVersion: apps/v1
kind: StatefulSet
metadata:
  labels:
    app: etcd
  name: etcd
  namespace: merry
spec:
  replicas: 3
  selector:
    matchLabels:
      app: etcd
  serviceName: etcd-headless
  template:
    metadata:
      labels:
        app: etcd
      name: etcd
    spec:
      volumes:
      - name: etcd-config
        configMap:
            name: etcd-cm
      containers:
        - env:
          - name: MY_POD_NAME  #当前pod名
            valueFrom:
              fieldRef:
                fieldPath: metadata.name
          - name: CLUSTER_NAMESPACE  #名称空间
            valueFrom: 
              fieldRef:
                fieldPath: metadata.namespace
          - name: SERVICE_NAME   #内部通信的无头服务名称
            value: "etcd-headless"
          - name: INITIAL_CLUSTER   #initial-cluster的值
            value: "etcd-0=http://etcd-0.etcd-headless.merry:2380,etcd-1=http://etcd-1.etcd-headless.merry:2380,etcd-2=http://etcd-2.etcd-headless.merry:2380"
          image: etcd:3.4.18
          imagePullPolicy: Always
          name: etcd
          ports:
          - containerPort: 2380
            name: peer
            protocol: TCP
          - containerPort: 2379
            name: client
            protocol: TCP
          resources:
            requests:
              memory: "128Mi"
              cpu: "100m"
            limits:
              memory: "4Gi"
              cpu: "1000m"
          volumeMounts:
          - mountPath: /var/lib/etcd
            name: etcd-data
      affinity:
        podAntiAffinity:
          #绝对不要在一个node
          requiredDuringSchedulingIgnoredDuringExecution: # 硬策略
            - topologyKey: "kubernetes.io/hostname"
              labelSelector:
                matchExpressions:
                  - key: "app"
                    operator: In
                    values:
                      - etcd
  updateStrategy:
    type: OnDelete
  volumeClaimTemplates:
  - metadata:
      name: etcd-data
    spec:
      accessModes: [ "ReadWriteMany" ]
      storageClassName: managed-nfs-storage
      resources:
        requests:
          storage: 100Gi

#etcd-cluster-svc.yaml

apiVersion: v1
kind: Service
metadata:
  name: etcd-headless
  namespace: merry
  labels:
    app: etcd
spec:
  ports:
  - port: 2380
    name: etcd-server
  - port: 2379
    name: etcd-client
  clusterIP: None
  selector:
    app: etcd
  publishNotReadyAddresses: true
--- 
apiVersion: v1
kind: Service
metadata:
  labels:
    app: etcd
  name: etcd-svc
  namespace: merry
spec:
  ports:
  - name: etcd-cluster
    port: 2379
    targetPort: 2379
    #nodePort: 12379
  - name: port2380
    port: 2380
    targetPort: 2380
    #nodePort: 12380
  selector:
    app: etcd
  sessionAffinity: None
  type: NodePort

#etcd-cluster-pdb.yaml

apiVersion: policy/v1beta1
kind: PodDisruptionBudget
metadata:
  name: etcd-pdb
  namespace: merry
  labels:
    pdb: etcd
spec:
  minAvailable: 2
  selector:
    matchLabels:
      app: etcd

Dockerfile文件内容：

FROM centos:centos7.9.2009

USER root
ADD etcd-3.4.18/etcd* /usr/bin/
COPY etcd.sh /
RUN chmod +x /etcd.sh && yum makecache fast && yum install -y vim curl && yum clean all
EXPOSE 2379 2380
CMD ["/etcd.sh"]

#脚本etcd.sh
#!/bin/bash
/usr/bin/etcd --data-dir=/var/lib/etcd --name=${MY_POD_NAME} --listen-peer-urls=http://0.0.0.0:2380 --listen-client-urls=http://0.0.0.0:2379 --advertise-client-urls=http://${MY_POD_NAME}.${SERVICE_NAME}.${CLUSTER_NAMESPACE}:2379 --initial-advertise-peer-urls=http://${MY_POD_NAME}.${SERVICE_NAME}.${CLUSTER_NAMESPACE}:2380 --initial-cluster-state='new' --initial-cluster-token='etcd-cluster-token' --initial-cluster=${INITIAL_CLUSTER}

#节点健康检查

etcdctl --user=root:'admin123' --write-out=table --endpoints=http://etcd-0.etcd-headless.trs:2379,http://etcd-1.etcd-headless.trs:2379,http://etcd-2.etcd-headless.trs:2379 endpoint health

二进制文件包下载地址：

二进制包etcd-v3.4.18-linux-amd64.tar.gz-Linux文档类资源-CSDN下载

制作好的docker镜像下载：

docker镜像etcd-3.4.18-Linux文档类资源-CSDN下载