k8s 搭建有状态kafka

作者: daley_磊 | 来源:发表于2020-01-10 10:07 被阅读0次

k8s 搭建有状态kafka

参考：https://github.com/cuishuaigit/k8s-kafka

以三台机器为例：

配置节点标签:
需要在那台机器上运行kafka，需要在节点创建标签

kubectl label node [node-name] travis.io/schedule-only=kafka

配置节点污点：
在指定机器上不允许kafka 运行

kubectl taint node [node-name] travis.io/schedule-only=kafka:NoSchedule

配置 pv:
vim pv.yaml

apiVersion: v1
kind: PersistentVolume
metadata:
   name: nfspv1
spec:
   capacity:
      storage: 10Gi
   accessModes:
      - ReadWriteMany
   persistentVolumeReclaimPolicy: Retain
   storageClassName: nfs
   nfs:
      path: /nfs/storage1
      server: 10.3.7.243
---
apiVersion: v1
kind: PersistentVolume
metadata:
   name: nfspv2
spec:
   capacity:
      storage: 10Gi
   accessModes:
      - ReadWriteMany
   persistentVolumeReclaimPolicy: Retain
   storageClassName: nfs
   nfs:
      path: /nfs/storage2
      server: 10.3.7.243
---
apiVersion: v1
kind: PersistentVolume
metadata:
   name: nfspv3
spec:
   capacity:
      storage: 10Gi
   accessModes:
      - ReadWriteMany
   persistentVolumeReclaimPolicy: Retain
   storageClassName: nfs
   nfs:
      path: /nfs/storage3
      server: 10.3.7.243
---
apiVersion: v1
kind: PersistentVolume
metadata:
   name: nfspv4
spec:
   capacity:
      storage: 10Gi
   accessModes:
      - ReadWriteMany
   persistentVolumeReclaimPolicy: Retain
   storageClassName: nfs
   nfs:
      path: /nfs/storage4
      server: 10.3.7.243
---
apiVersion: v1
kind: PersistentVolume
metadata:
   name: nfspv5
spec:
   capacity:
      storage: 10Gi
   accessModes:
      - ReadWriteMany
   persistentVolumeReclaimPolicy: Retain
   storageClassName: nfs
   nfs:
      path: /nfs//storage5
      server: 10.3.7.243
---
apiVersion: v1
kind: PersistentVolume
metadata:
   name: nfspv6
spec:
   capacity:
      storage: 10Gi
   accessModes:
      - ReadWriteMany
   persistentVolumeReclaimPolicy: Retain
   storageClassName: nfs
   nfs:
      path: /nfs/storage6
      server: 10.3.7.243

创建pv
kubectl apply -f pv.yaml
kubectl get pv
配置 namespace
vim namespace.yaml

apiVersion: v1
kind: Namespace
metadata:
  name: kafka

创建namespace
kubectl apply -f namespace.yaml
kubectl get namespace
配置 zk
vim zk.yaml

apiVersion: v1
kind: Service
metadata:
  name: zk-hs
  namespace: kafka
  labels:
    app: zk
spec:
  ports:
  - port: 2888
    name: server
  - port: 3888
    name: leader-election
  clusterIP: None
  selector:
    app: zk
---
apiVersion: v1
kind: Service
metadata:
  name: zk-cs
  namespace: kafka
  labels:
    app: zk
spec:
  ports:
  - port: 2181
    name: client
  selector:
    app: zk
---
apiVersion: policy/v1beta1
kind: PodDisruptionBudget
metadata:
  name: zk-pdb
  namespace: kafka
spec:
  selector:
    matchLabels:
      app: zk
  maxUnavailable: 1
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: zk
  namespace: kafka
spec:
  selector:
    matchLabels:
      app: zk
  serviceName: zk-hs
  replicas: 3    #创建三个pod
  updateStrategy:
    type: RollingUpdate
  podManagementPolicy: Parallel
  template:
    metadata:
      labels:
        app: zk
    spec:
      nodeSelector:   #进行label匹配，调度pod到目标节点
          travis.io/schedule-only: "kafka"
      tolerations:
      - key: "travis.io/schedule-only"
        operator: "Equal"
        value: "kafka"
        effect: "NoSchedule"
      - key: "travis.io/schedule-only"
        operator: "Equal"
        value: "kafka"
        effect: "NoExecute"
        tolerationSeconds: 3600
      - key: "travis.io/schedule-only"
        operator: "Equal"
        value: "kafka"
        effect: "PreferNoSchedule"
      affinity:  #配置每个机器只能运行一个pod 
        podAntiAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            - labelSelector:
                matchExpressions:
                  - key: "app"
                    operator: In
                    values:
                    - zk
              topologyKey: "kubernetes.io/hostname"
      imagePullSecrets:  # 指定自己的私有镜像秘钥
      - name: registry-key
      containers:
      - name: kubernetes-zookeeper
        imagePullPolicy: Always
        image: 10.3.7.241/kafka/zookeeper:3.4.10
        resources:
          requests:
            memory: "20Mi"
            cpu: "0.1"
        ports:
        - containerPort: 2181
          name: client
        - containerPort: 2888
          name: server
        - containerPort: 3888
          name: leader-election
        command:
        - sh
        - -c
        - "start-zookeeper \
          --servers=3 \    
          --data_dir=/var/lib/zookeeper/data \
          --data_log_dir=/var/lib/zookeeper/data/log \
          --conf_dir=/opt/zookeeper/conf \
          --client_port=2181 \
          --election_port=3888 \
          --server_port=2888 \
          --tick_time=2000 \
          --init_limit=10 \
          --sync_limit=5 \
          --heap=512M \
          --max_client_cnxns=60 \
          --snap_retain_count=3 \
          --purge_interval=12 \
          --max_session_timeout=40000 \
          --min_session_timeout=4000 \
          --log_level=INFO"
        readinessProbe: # pod 健康监测
          exec:
            command:
            - sh
            - -c
            - "zookeeper-ready 2181"
          initialDelaySeconds: 10
          timeoutSeconds: 5
        livenessProbe:
          exec:
            command:
            - sh
            - -c
            - "zookeeper-ready 2181"
          initialDelaySeconds: 10
          timeoutSeconds: 5
        volumeMounts:
        - name: datadir
          mountPath: /var/lib/zookeeper
      securityContext:
        runAsUser: 1000
        fsGroup: 1000
  volumeClaimTemplates: #nfs 映射模版配置
  - metadata:
      name: datadir
    spec:
      accessModes: [ "ReadWriteMany" ]
      storageClassName: nfs
      resources:
        requests:
          storage: 10Gi

创建 zk
kubectl apply -f zk.yaml
kubectl get pod -n kafka
配置kafka
vim kafka.yaml


apiVersion: v1
kind: Service
metadata:
  name: kafka-svc
  namespace: kafka
  labels:
    app: kafka
spec:
  ports:
  - port: 9092
    name: server
  clusterIP: None
  selector:
    app: kafka
---
apiVersion: policy/v1beta1
kind: PodDisruptionBudget
metadata:
  name: kafka-pdb
  namespace: kafka
spec:
  selector:
    matchLabels:
      app: kafka
  minAvailable: 2
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: kafka
  namespace: kafka
spec:
  selector:
     matchLabels:
        app: kafka
  serviceName: kafka-svc
  replicas: 3   # kafka 集群数量
  template:
    metadata:
      labels:
        app: kafka
    spec:
      nodeSelector:
          travis.io/schedule-only: "kafka"
      tolerations:
      - key: "travis.io/schedule-only"
        operator: "Equal"
        value: "kafka"
        effect: "NoSchedule"
      - key: "travis.io/schedule-only"
        operator: "Equal"
        value: "kafka"
        effect: "NoExecute"
        tolerationSeconds: 3600
      - key: "travis.io/schedule-only"
        operator: "Equal"
        value: "kafka"
        effect: "PreferNoSchedule"
      affinity:
        podAntiAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            - labelSelector:
                matchExpressions:
                  - key: "app"
                    operator: In
                    values:
                    - kafka
              topologyKey: "kubernetes.io/hostname"
        podAffinity:
          preferredDuringSchedulingIgnoredDuringExecution:
             - weight: 1
               podAffinityTerm:
                 labelSelector:
                    matchExpressions:
                      - key: "app"
                        operator: In
                        values:
                        - zk
                 topologyKey: "kubernetes.io/hostname"
      terminationGracePeriodSeconds: 300
      imagePullSecrets:
      - name: registry-key
      containers:
      - name: k8s-kafka
        imagePullPolicy: Always
        image: 10.3.7.241/kafka/kafka:2.2.0
        resources:
          requests:
            memory: "60Mi"
            cpu: 50m
        ports:
        - containerPort: 9092
          name: server
        command:
        - sh
        - -c
        - "exec kafka-server-start.sh /opt/kafka/config/server.properties --override broker.id=${HOSTNAME##*-} \
          --override listeners=PLAINTEXT://:9092 \
          --override zookeeper.connect=zk-0.zk-hs.kafka.svc.cluster.local:2181,zk-1.zk-hs.kafka.svc.cluster.local:2181 \
          --override log.dir=/var/lib/kafka \
          --override auto.create.topics.enable=true \
          --override auto.leader.rebalance.enable=true \
          --override background.threads=10 \
          --override compression.type=producer \
          --override delete.topic.enable=false \
          --override leader.imbalance.check.interval.seconds=300 \
          --override leader.imbalance.per.broker.percentage=10 \
          --override log.flush.interval.messages=9223372036854775807 \
          --override log.flush.offset.checkpoint.interval.ms=60000 \
          --override log.flush.scheduler.interval.ms=9223372036854775807 \
          --override log.retention.bytes=-1 \
          --override log.retention.hours=72 \
          --override log.roll.hours=168 \
          --override log.roll.jitter.hours=0 \
          --override log.segment.bytes=1073741824 \
          --override log.segment.delete.delay.ms=60000 \
          --override message.max.bytes=1000012 \
          --override min.insync.replicas=1 \
          --override num.io.threads=8 \
          --override num.network.threads=3 \
          --override num.recovery.threads.per.data.dir=1 \
          --override num.replica.fetchers=1 \
          --override offset.metadata.max.bytes=4096 \
          --override offsets.commit.required.acks=-1 \
          --override offsets.commit.timeout.ms=5000 \
          --override offsets.load.buffer.size=5242880 \
          --override offsets.retention.check.interval.ms=600000 \
          --override offsets.retention.minutes=1440 \
          --override offsets.topic.compression.codec=0 \
          --override offsets.topic.num.partitions=50 \
          --override offsets.topic.replication.factor=3 \
          --override offsets.topic.segment.bytes=104857600 \
          --override queued.max.requests=500 \
          --override quota.consumer.default=9223372036854775807 \
          --override quota.producer.default=9223372036854775807 \
          --override replica.fetch.min.bytes=1 \
          --override replica.fetch.wait.max.ms=500 \
          --override replica.high.watermark.checkpoint.interval.ms=5000 \
          --override replica.lag.time.max.ms=10000 \
          --override replica.socket.receive.buffer.bytes=65536 \
          --override replica.socket.timeout.ms=30000 \
          --override request.timeout.ms=30000 \
          --override socket.receive.buffer.bytes=102400 \
          --override socket.request.max.bytes=104857600 \
          --override socket.send.buffer.bytes=102400 \
          --override unclean.leader.election.enable=true \
          --override zookeeper.session.timeout.ms=6000 \
          --override zookeeper.set.acl=false \
          --override broker.id.generation.enable=true \
          --override connections.max.idle.ms=600000 \
          --override controlled.shutdown.enable=true \
          --override controlled.shutdown.max.retries=3 \
          --override controlled.shutdown.retry.backoff.ms=5000 \
          --override controller.socket.timeout.ms=30000 \
          --override default.replication.factor=2 \
          --override fetch.purgatory.purge.interval.requests=1000 \
          --override group.max.session.timeout.ms=300000 \
          --override group.min.session.timeout.ms=6000 \
          --override inter.broker.protocol.version=2.2.0 \
          --override log.cleaner.backoff.ms=15000 \
          --override log.cleaner.dedupe.buffer.size=134217728 \
          --override log.cleaner.delete.retention.ms=86400000 \
          --override log.cleaner.enable=true \
          --override log.cleaner.io.buffer.load.factor=0.9 \
          --override log.cleaner.io.buffer.size=524288 \
          --override log.cleaner.io.max.bytes.per.second=1.7976931348623157E308 \
          --override log.cleaner.min.cleanable.ratio=0.5 \
          --override log.cleaner.min.compaction.lag.ms=0 \
          --override log.cleaner.threads=1 \
          --override log.cleanup.policy=delete \
          --override log.index.interval.bytes=4096 \
          --override log.index.size.max.bytes=10485760 \
          --override log.message.timestamp.difference.max.ms=9223372036854775807 \
          --override log.message.timestamp.type=CreateTime \
          --override log.preallocate=false \
          --override log.retention.check.interval.ms=300000 \
          --override max.connections.per.ip=2147483647 \
          --override num.partitions=4 \
          --override producer.purgatory.purge.interval.requests=1000 \
          --override replica.fetch.backoff.ms=1000 \
          --override replica.fetch.max.bytes=1048576 \
          --override replica.fetch.response.max.bytes=10485760 \
          --override reserved.broker.max.id=1000 "
        env:
        - name: KAFKA_HEAP_OPTS
          value : "-Xmx512M -Xms512M"
        - name: KAFKA_OPTS
          value: "-Dlogging.level=INFO"
        volumeMounts:
        - name: datadir
          mountPath: /var/lib/kafka
        readinessProbe:
          tcpSocket:
            port: 9092
          timeoutSeconds: 1
          initialDelaySeconds: 5
      securityContext:
        runAsUser: 1000
        fsGroup: 1000
  volumeClaimTemplates:
  - metadata:
      name: datadir
    spec:
      accessModes: [ "ReadWriteMany" ]
      storageClassName: nfs
      resources:
        requests:
          storage:  10Gi

创建 kafka
kubectl apply -f kafka.yaml
kubectl get pod -n kafka
测试Kafka 是否正常使用
进入容器

kubectl -n kafka exec -it kafka-0 /bin/bash

创建topic

kafka-topics.sh --create \
--zookeeper  zoo1:2181,zoo2:2181,zoo3:2181\
--partitions 1 \
--replication-factor 2 \
--topic topic-1

查看topic

kafka-topics.sh --list --zookeeper zoo1:2181,zoo2:2181,zoo3:2181

kafka消费消息

kafka-console-consumer.sh --topic test --bootstrap-server localhost:9092

kafka 发送消息（在另外一个节点中打开）

kafka-console-producer.sh --topic test --broker-list localhost:9092
>  随便输入些东西

查看消费端是否接受到消息，接收到说明 kafka 成功！

ip及端口信息

zk:
zk-0.zk-hs.kafka.svc.cluster.local
zk-1.zk-hs.kafka.svc.cluster.local
zk-2.zk-hs.kafka.svc.cluster.local
zk-port:
2181
kafka:
kafka-0.kafka-svc.kafka.svc.cluster.local
kafka-1.kafka-svc.kafka.svc.cluster.local
kafka-2.kafka-svc.kafka.svc.cluster.local
kafka-port:
9092

k8s 搭建有状态kafka

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