在Kubernetes集群上搭建Stateful kafka集群

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我是靠谱客的博主欣慰汉堡，最近开发中收集的这篇文章主要介绍在Kubernetes集群上搭建Stateful kafka集群，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

1、创建pv

[root@k8s-node1 kafka]# cat kafka-pv.yaml 
kind: PersistentVolume
apiVersion: v1
metadata:
  name: pv-kafka1
  annotations:
    volume.beta.kubernetes.io/storage-class: "anything"
  labels:
    type: local
spec:
  capacity:
    storage: 300Mi
  accessModes:
    - ReadWriteOnce
  hostPath:
    path: "/data/kafka1"
  persistentVolumeReclaimPolicy: Recycle
---
kind: PersistentVolume
apiVersion: v1
metadata:
  name: pv-kafka2
  annotations:
    volume.beta.kubernetes.io/storage-class: "anything"
  labels:
    type: local
spec:
  capacity:
    storage: 300Mi
  accessModes:
    - ReadWriteOnce
  hostPath:
    path: "/data/kafka2"
  persistentVolumeReclaimPolicy: Recycle
---
kind: PersistentVolume
apiVersion: v1
metadata:
  name: pv-kafka3
  annotations:
    volume.beta.kubernetes.io/storage-class: "anything"
  labels:
    type: local
spec:
  capacity:
    storage: 300Mi
  accessModes:
    - ReadWriteOnce
  hostPath:
    path: "/data/kafka3"
  persistentVolumeReclaimPolicy: Recycle

2、查看pv

[root@k8s-node1 kafka]# kubectl get pv
NAME         CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS    CLAIM                     STORAGECLASS   REASON    AGE
pv-kafka1    300Mi      RWO            Recycle          Bound     default/datadir-kafka-0   anything                 18h
pv-kafka2    300Mi      RWO            Recycle          Bound     default/datadir-kafka-1   anything                 18h
pv-kafka3    300Mi      RWO            Recycle          Bound     default/datadir-kafka-2   anything                 18h

3、创建kafka StatefulSet

[root@k8s-node1 kafka]# cat kafka-sts.yaml 
apiVersion: v1
kind: Service
metadata:
  name: kafka-hs
  labels:
    app: kafka
spec:
  ports:
  - port: 9093
    name: server
  clusterIP: None
  selector:
    app: kafka
---
apiVersion: policy/v1beta1
kind: PodDisruptionBudget
metadata:
  name: kafka-pdb
spec:
  selector:
    matchLabels:
      app: kafka
  maxUnavailable: 1
---
apiVersion: apps/v1beta1
kind: StatefulSet
metadata:
  name: kafka
spec:
  serviceName: kafka-hs
  replicas: 3
  podManagementPolicy: Parallel
  updateStrategy:
    type: RollingUpdate
  template:
    metadata:
      labels:
        app: kafka
    spec:
      terminationGracePeriodSeconds: 300
      containers:
      - name: k8skafka
        imagePullPolicy: IfNotPresent
        image: mirrorgooglecontainers/kubernetes-kafka:1.0-10.2.1
        resources:
          requests:
            memory: "256Mi"
            cpu: "0.1"
        ports:
        - containerPort: 9093
          name: server
        command:
        - sh
        - -c
        - "exec kafka-server-start.sh /opt/kafka/config/server.properties --override broker.id=${HOSTNAME##*-} 
          --override listeners=PLAINTEXT://:9093 
          --override zookeeper.connect=zk-cs.default.svc.cluster.local.:2181   #修改zookeeper连接地址
          --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=0.10.2-IV0 
          --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=3 
          --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 : "-Xmx256M -Xms256M"
        - name: KAFKA_OPTS
          value: "-Dlogging.level=INFO"
        volumeMounts:
        - name: datadir
          mountPath: /var/lib/kafka
        readinessProbe:
          exec:
           command:
            - sh
            - -c
            - "/opt/kafka/bin/kafka-broker-api-versions.sh --bootstrap-server=localhost:9093"
      securityContext:
        runAsUser: 1000
        fsGroup: 1000
  volumeClaimTemplates:
  - metadata:
      name: datadir
      annotations:
        volume.beta.kubernetes.io/storage-class: "anything"

    spec:
      accessModes: [ "ReadWriteOnce" ]
      resources:
        requests:
          storage: 300Mi

注意：需要修改以下地方：

 --override zookeeper.connect=zk-cs.bigdata.svc.cluster.local:2181     #zookeeper地址
image: mirrorgooglecontainers/kubernetes-kafka:1.0-10.2.1   #镜像地址

4、查看pod运行状态

[root@k8s-node1 kafka]# kubectl get pod
NAME                                   READY     STATUS    RESTARTS   AGE
kafka-0                                1/1       Running   0          18h
kafka-1                                1/1       Running   0          18h
kafka-2                                1/1       Running   0          18h

5、通过zookeeper查看broker:

[root@k8s-node1 kafka]# kubectl exec -ti zk-1  bash
zookeeper@zk-1:/$ zkCli.sh 
Connecting to localhost:2181
[zk: localhost:2181(CONNECTED) 0] ls /
[cluster, controller, controller_epoch, brokers, zookeeper, admin, isr_change_notification, consumers, hello, config]
[zk: localhost:2181(CONNECTED) 1] ls /brokers
[ids, topics, seqid]
[zk: localhost:2181(CONNECTED) 2] ls /brokers/ids
[0, 1, 2]
[zk: localhost:2181(CONNECTED) 3] 
[zk: localhost:2181(CONNECTED) 3] get /brokers/ids/0
{"listener_security_protocol_map":{"PLAINTEXT":"PLAINTEXT"},"endpoints":["PLAINTEXT://kafka-0.kafka-hs.default.svc.cluster.local:9093"],"jmx_port":-1,"host":"kafka-0.kafka-hs.default.svc.cluster.local","timestamp":"1573619460916","port":9093,"version":4}
cZxid = 0x10000004b
ctime = Wed Nov 13 04:31:00 UTC 2019
mZxid = 0x10000004b
mtime = Wed Nov 13 04:31:00 UTC 2019
pZxid = 0x10000004b
cversion = 0
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x16e628b4c0a0006
dataLength = 254
numChildren = 0
[zk: localhost:2181(CONNECTED) 4] get /brokers/ids/1
{"listener_security_protocol_map":{"PLAINTEXT":"PLAINTEXT"},"endpoints":["PLAINTEXT://kafka-1.kafka-hs.default.svc.cluster.local:9093"],"jmx_port":-1,"host":"kafka-1.kafka-hs.default.svc.cluster.local","timestamp":"1573619460909","port":9093,"version":4}
cZxid = 0x100000048
ctime = Wed Nov 13 04:31:00 UTC 2019
mZxid = 0x100000048
mtime = Wed Nov 13 04:31:00 UTC 2019
pZxid = 0x100000048
cversion = 0
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x36e628b4c540004
dataLength = 254
numChildren = 0
[zk: localhost:2181(CONNECTED) 5] get /brokers/ids/2
{"listener_security_protocol_map":{"PLAINTEXT":"PLAINTEXT"},"endpoints":["PLAINTEXT://kafka-2.kafka-hs.default.svc.cluster.local:9093"],"jmx_port":-1,"host":"kafka-2.kafka-hs.default.svc.cluster.local","timestamp":"1573619460932","port":9093,"version":4}
cZxid = 0x10000004e
ctime = Wed Nov 13 04:31:00 UTC 2019
mZxid = 0x10000004e
mtime = Wed Nov 13 04:31:00 UTC 2019
pZxid = 0x10000004e
cversion = 0
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x26e628b922c0005
dataLength = 254
numChildren = 0
[zk: localhost:2181(CONNECTED) 6]

6、kafka基本操作测试

[root@k8s-master sts]# kubectl exec -it kafka-0  sh
$ pwd
/opt/kafka/bin
#创建test topic
$  ./kafka-topics.sh --create --topic test --zookeeper zk-cs.default.svc.cluster.local:2181    --partitions 3 --replication-factor 3
Created topic "test".
#查看topic
$ ./kafka-topics.sh --zookeeper zk-cs.default.svc.cluster.local:2181 --list
test
$