[大数据]k8s部署kafka集群

1. zk-all-in-one.yaml

• zk镜像自己找一个这个版本的,打个tag
• zk和kafka都是用的storageclass

# 无头服务
apiVersion: v1
kind: Service
metadata:
  name: zk-hs
  namespace: testing
  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: testing
  labels:
    app: zk
spec:
  ports:
  - port: 2181
    name: client
  selector:
    app: zk
---
apiVersion: policy/v1beta1
kind: PodDisruptionBudget
metadata:
  name: zk-pdb
  namespace: testing
spec:
  selector:
    matchLabels:
      app: zk
  maxUnavailable: 1
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: zk
  namespace: testing
spec:
  selector:
    matchLabels:
      app: zk
  serviceName: zk-hs
  replicas: 3
  updateStrategy:
    type: RollingUpdate
  podManagementPolicy: Parallel
  template:
    metadata:
      labels:
        app: zk
    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:
                    - zk
              topologyKey: "kubernetes.io/hostname"
      containers:
      - name: kubernetes-zookeeper
        imagePullPolicy: IfNotPresent
        image: k8s.gcr.io/kubernetes-zookeeper:1.0-3.4.10
        resources:
          requests:
            memory: "1G"
            cpu: "0.5"
        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:
          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:
  - metadata:
      name: datadir
      #This annotation is still working, however it will become fully deprecated in a future Kubernetes release.just use storageClassName.
      # annotations:
      #   volume.beta.kubernetes.io/storage-class: nfs-storage
      #   volume.beta.kubernetes.io/storage-provisioner: fuseim.pri/ifs
    spec:
      accessModes: [ "ReadWriteMany" ]
      storageClassName: testing-storageclass
      resources:
        requests:
          storage: 10G

2. kafka-all-in-one.yaml

• kafka镜像是可以pull到的

---
apiVersion: v1
kind: Service
metadata:
  name: kafka-svc
  namespace: testing
  labels:
    app: kafka
spec:
  ports:
    - port: 9092
      name: server
  clusterIP: None
  selector:
    app: kafka
---
apiVersion: policy/v1beta1
kind: PodDisruptionBudget
metadata:
  name: kafka-pdb
  namespace: testing
spec:
  selector:
    matchLabels:
      app: kafka
  minAvailable: 2
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: kafka
  namespace: testing
spec:
  selector:
    matchLabels:
      app: kafka
  serviceName: kafka-svc
  replicas: 3
  template:
    metadata:
      labels:
        app: kafka
    spec:
      affinity:
        podAntiAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            - labelSelector:
                matchExpressions:
                  - key: "app"
                    operator: In
                    values:
                      - kafka
              topologyKey: "kubernetes.io/hostname"
      affinity:
        podAntiAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            - labelSelector:
                matchExpressions:
                  - key: "app"
                    operator: In
                    values:
                      - kafka
                  - key: "kubernetes.io/hostname"
                    operator: NotIn
                    values:
                      - master
              topologyKey: "kubernetes.io/hostname"
      terminationGracePeriodSeconds: 300
      containers:
        - name: k8s-kafka
          imagePullPolicy: IfNotPresent
          image: fastop/kafka:2.2.0
          resources:
            requests:
              memory: "600Mi"
              cpu: 500m
          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 \
# 这里是需要改的,改成自己的名称zk名字,zk无头服务和名称空间 zk-0.zk-hs.testing.svc.cluster.local:2181
          --override zookeeper.connect=zk-0.zk-hs.testing.svc.cluster.local:2181,zk-1.zk-hs.testing.svc.cluster.local:2181,zk-2.zk-hs.testing.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=168 \
          --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=1 \
          --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: kafka
              mountPath: /var/lib/kafka
          readinessProbe:
            tcpSocket:
              port: 9092
            timeoutSeconds: 1
            initialDelaySeconds: 5
      securityContext:
        runAsUser: 1000
        fsGroup: 1000
  volumeClaimTemplates:
    - metadata:
        name: kafka
      spec:
        accessModes: [ "ReadWriteMany" ]
        storageClassName: testing-storageclass
        resources:
          requests:
            storage:  500Mi

3. 集群检查

### zk检查
# 可以挨个检查
kubectl -n testing exec -ti zk-2 -- zkServer.sh status

# 配置文件
kubectl exec zk-0 -- cat /opt/zookeeper/conf/zoo.cfg

# 设置一个键 
kubectl exec zk-0 zkCli.sh create /hello world

# 在另外一个节点get一下这个键
kubectl exec zk-1 zkCli.sh get /hello

# kafka检查
# 随便进入一个kafka节点
kubectl exec -it kafka-0 bash -n testing

# 创建名字为test的topic,记得改为自己的名称空间
kafka-topics.sh --create --topic test --zookeeper zk-0.zk-hs.testing.svc.cluster.local:2181,zk-1.zk-hs.testing.svc.cluster.local:2181,zk-2.zk-hs.testing.svc.cluster.local:2181 --partitions 3 --replication-factor 2

# 看看列表,改namespace
kafka-topics.sh --list --zookeeper zk-0.zk-hs.testing.svc.cluster.local:2181,zk-1.zk-hs.testing.svc.cluster.local:2181,zk-2.zk-hs.testing.svc.cluster.local:2181

# kafka生产者
kafka-console-producer.sh --topic test --broker-list localhost:9092

# 在另一个kafka连接
kubectl exec -it kafka-1 bash -n testing

# 消费者测试,看是否和生产者生产的信息一致
kafka-console-consumer.sh --topic test --bootstrap-server localhost:9092