K8S 搭建 Pinpoint (一、配置 zookeeper 集群)

环境准备

3台机器，操作系统为 CentOS Linux release 7.8.2003

下面无特殊说明，都是在 master 机器上操作

创建目录和专用的命名空间

mkdir -p /data/yaml/pinpoint && cd /data/yaml/pinpoint

kubectl create ns pinpoint

部署 zookeepers

mkdir -p /data/yaml/pinpoint/zookeepers && cd /data/yaml/pinpoint/zookeepers

cat zoo1.yaml 
apiVersion: v1
kind: Service
metadata:
  namespace: pinpoint
  labels:
    app: zoo1
  name: zoo1
spec:
  ports:
  - name: httpa
    port: 2181
    targetPort: 2181
  - name: httpb
    port: 2888
    targetPort: 2888
  - name: httpc
    port: 3888
    targetPort: 3888
  selector:
    app: zoo1
---
apiVersion: apps/v1
kind: Deployment
metadata:
  namespace: pinpoint
  name: zoo1
  labels:
    app: zoo1
spec:
  replicas: 1
  minReadySeconds: 120
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 0
  selector:
    matchLabels:
      app: zoo1
  template:
    metadata:
      labels:
        app: zoo1
    spec:
      terminationGracePeriodSeconds: 60
      hostname: zoo1
      containers:
      - name: zoo1
        image: harbor.junengcloud.com/pinpoint/zookeeper:3.4
        resources:
          requests:
            cpu: 100m
            memory: 204Mi
          limits:
            cpu: 2000m
            memory: 2048Mi
        ports:
        - containerPort: 2181
          name: httpa
        - containerPort: 2888
          name: httpb
        - containerPort: 3888
          name: httpc
        livenessProbe:
          tcpSocket:
            port: 2181
          initialDelaySeconds: 60
          periodSeconds: 180
        env:
        - name: ZOO_MY_ID
          value: "1"
        - name: ZOO_SERVERS
          value: "server.1=0.0.0.0:2888:3888 server.2=zoo2:2888:3888 server.3=zoo3:2888:3888"

cat zoo2.yaml 
apiVersion: v1
kind: Service
metadata:
  namespace: pinpoint
  labels:
    app: zoo2
  name: zoo2
spec:
  ports:
  - name: httpa
    port: 2181
    targetPort: 2181
  - name: httpb
    port: 2888
    targetPort: 2888
  - name: httpc
    port: 3888
    targetPort: 3888
  selector:
    app: zoo2
---
apiVersion: apps/v1
kind: Deployment
metadata:
  namespace: pinpoint
  name: zoo2
  labels:
    app: zoo2
spec:
  replicas: 1
  minReadySeconds: 120
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 0
  selector:
    matchLabels:
      app: zoo2
  template:
    metadata:
      labels:
        app: zoo2
    spec:
      terminationGracePeriodSeconds: 60
      hostname: zoo2
      containers:
      - name: zoo2
        image: harbor.junengcloud.com/pinpoint/zookeeper:3.4
        resources:
          requests:
            cpu: 100m
            memory: 204Mi
          limits:
            cpu: 2000m
            memory: 2048Mi
        ports:
        - containerPort: 2181
          name: httpa
        - containerPort: 2888
          name: httpb
        - containerPort: 3888
          name: httpc
        livenessProbe:
          tcpSocket:
            port: 2181
          initialDelaySeconds: 60
          periodSeconds: 180
        env:
        - name: ZOO_MY_ID
          value: "2"
        - name: ZOO_SERVERS
          value: "server.1=zoo1:2888:3888 server.2=0.0.0.0:2888:3888 server.3=zoo3:2888:3888"

 cat zoo3.yaml 
apiVersion: v1
kind: Service
metadata:
  namespace: pinpoint
  labels:
    app: zoo3
  name: zoo3
spec:
  ports:
  - name: httpa
    port: 2181
    targetPort: 2181
  - name: httpb
    port: 2888
    targetPort: 2888
  - name: httpc
    port: 3888
    targetPort: 3888
  selector:
    app: zoo3
---
apiVersion: apps/v1
kind: Deployment
metadata:
  namespace: pinpoint
  name: zoo3
  labels:
    app: zoo3
spec:
  replicas: 1
  minReadySeconds: 120
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 0
  selector:
    matchLabels:
      app: zoo3
  template:
    metadata:
      labels:
        app: zoo3
    spec:
      terminationGracePeriodSeconds: 60
      hostname: zoo3
      containers:
      - name: zoo3
        image: harbor.junengcloud.com/pinpoint/zookeeper:3.4
        resources:
          requests:
            cpu: 100m
            memory: 204Mi
          limits:
            cpu: 2000m
            memory: 2048Mi
        ports:
        - containerPort: 2181
          name: httpa
        - containerPort: 2888
          name: httpb
        - containerPort: 3888
          name: httpc
        livenessProbe:
          tcpSocket:
            port: 2181
          initialDelaySeconds: 60
          periodSeconds: 180
        env:
        - name: ZOO_MY_ID
          value: "3"
        - name: ZOO_SERVERS
          value: "server.1=zoo1:2888:3888 server.2=zoo2:2888:3888 server.3=0.0.0.0:2888:3888"

kubectl apply zoo1.yaml
kubectl apply zoo2.yaml
kubectl apply zoo3.yaml

kubectl get pod -n pinpoint
zoo1-749d8cc498-54tff                 1/1     Running   2          6d22h
zoo2-695c9f8755-zftqf                 1/1     Running   2          6d22h
zoo3-6bb94d5568-tlnlh                 1/1     Running   2          6d22h

kubectl get svc -n pinpoint
zoo1                 ClusterIP   10.111.190.15    <none>        2181/TCP,2888/TCP,3888/TCP   6d22h
zoo2                 ClusterIP   10.98.15.48      <none>        2181/TCP,2888/TCP,3888/TCP   6d22h
zoo3                 ClusterIP   10.100.184.127   <none>        2181/TCP,2888/TCP,3888/TCP   6d22h

# 测试 zookeeper 集群
kubectl -n pinpoint exec -it zoo1-749d8cc498-54tff  -- zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /conf/zoo.cfg
Mode: follower

kubectl -n pinpoint exec -it zoo2-695c9f8755-zftqf  -- zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /conf/zoo.cfg
Mode: follower

kubectl -n pinpoint exec -it zoo3-6bb94d5568-tlnlh  -- zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /conf/zoo.cfg
Mode: leader