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.localzk-port:
2181kafka:
kafka-0.kafka-svc.kafka.svc.cluster.local
kafka-1.kafka-svc.kafka.svc.cluster.local
kafka-2.kafka-svc.kafka.svc.cluster.localkafka-port:
9092
