大家好，又见面了，我是你们的朋友全栈君。
k8s以StatefulSet方式部署kafka集群：
kafka-namespace.yaml
apiVersion: v1
kind: Namespace
metadata:
name: kafka
zookeeper-headless.yaml
apiVersion: v1
kind: Service
metadata:
name: zk-hs
namespace: kafka
labels:
app: zk
spec:
selector:
app: zk
ports:
- port: 2888
name: server
- port: 3888
name: leader-election
clusterIP: None
---
apiVersion: v1
kind: Service
metadata:
name: zk-cs
namespace: kafka
labels:
app: zk
spec:
selector:
app: zk
ports:
- port: 2181
name: client
---
apiVersion: v1
kind: ConfigMap
metadata:
name: zk-config
namespace: kafka
data:
ensemble: "zk-0;zk-1;zk-2"
replicas: "3"
jvm.heap: "512M"
tick: "2000"
init: "10"
sync: "5"
client.cnxns: "60"
snap.retain: "3"
purge.interval: "1"
---
apiVersion: policy/v1beta1
kind: PodDisruptionBudget
metadata:
name: zk-pdb
namespace: kafka
spec:
selector:
matchLabels:
app: zk
minAvailable: 2
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
name: zk
namespace: kafka
spec:
selector:
matchLabels:
app: zk
serviceName: zk-hs
replicas: 3
updateStrategy:
type: RollingUpdate
podManagementPolicy: OrderedReady
template:
metadata:
labels:
app: zk
spec:
affinity:
podAntiAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
- labelSelector:
matchExpressions:
- key: "app"
operator: In
values:
- zk
topologyKey: "kubernetes.io/hostname"
containers:
- name: zk
image: registry.cn-hangzhou.aliyuncs.com/xianlu/k8szk:v2
imagePullPolicy: IfNotPresent
ports:
- containerPort: 2181
name: client
- containerPort: 2888
name: server
- containerPort: 3888
name: leader-election
resources:
requests:
cpu: "500m"
memory: "512Mi"
env:
- name : ZK_ENSEMBLE
valueFrom:
configMapKeyRef:
name: zk-config
key: ensemble
- name : ZK_REPLICAS
valueFrom:
configMapKeyRef:
name: zk-config
key: replicas
- name : ZK_HEAP_SIZE
valueFrom:
configMapKeyRef:
name: zk-config
key: jvm.heap
- name : ZK_TICK_TIME
valueFrom:
configMapKeyRef:
name: zk-config
key: tick
- name : ZK_INIT_LIMIT
valueFrom:
configMapKeyRef:
name: zk-config
key: init
- name : ZK_SYNC_LIMIT
valueFrom:
configMapKeyRef:
name: zk-config
key: tick
- name : ZK_MAX_CLIENT_CNXNS
valueFrom:
configMapKeyRef:
name: zk-config
key: client.cnxns
- name: ZK_SNAP_RETAIN_COUNT
valueFrom:
configMapKeyRef:
name: zk-config
key: snap.retain
- name: ZK_PURGE_INTERVAL
valueFrom:
configMapKeyRef:
name: zk-config
key: purge.interval
- name: ZK_CLIENT_PORT
value: "2181"
- name: ZK_SERVER_PORT
value: "2888"
- name: ZK_ELECTION_PORT
value: "3888"
command:
- sh
- -c
- zkGenConfig.sh && zkServer.sh start-foreground
readinessProbe:
exec:
command:
- "zkOk.sh"
initialDelaySeconds: 15
timeoutSeconds: 5
livenessProbe:
exec:
command:
- "zkOk.sh"
initialDelaySeconds: 15
timeoutSeconds: 5
volumeMounts:
- name: data
mountPath: /var/lib/zookeeper
volumes:
- name: data
emptyDir: {
}
securityContext:
runAsUser: 1000
fsGroup: 1000
# volumeClaimTemplates:
# - metadata:
# name: data
# spec:
# accessModes: [ "ReadWriteOnce" ]
# storageClassName: "gluster-heketi-2"
# resources:
# requests:
# storage: 2Gi
Dockerfile
FROM ubuntu
ENV KAFKA_USER=kafka \
KAFKA_DATA_DIR=/var/lib/kafka/data \
JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64 \
KAFKA_HOME=/opt/kafka \
PATH=$PATH:/opt/kafka/bin
ARG KAFKA_VERSION=2.2.2
ARG KAFKA_DIST=kafka_2.12-2.2.2
RUN set -x \
&& apt-get update \
&& apt-get install -y wget openjdk-8-jre-headless gpg-agent \
&& wget https://mirrors.tuna.tsinghua.edu.cn/apache/kafka/$KAFKA_VERSION/$KAFKA_DIST.tgz \
&& wget http://www.apache.org/dist/kafka/$KAFKA_VERSION/$KAFKA_DIST.tgz.asc \
&& wget http://kafka.apache.org/KEYS \
&& export GNUPGHOME="$(mktemp -d)" \
&& gpg --import KEYS \
&& gpg --batch --verify "$KAFKA_DIST.tgz.asc" "$KAFKA_DIST.tgz" \
&& tar -xzf "$KAFKA_DIST.tgz" -C /opt \
&& rm -r "$GNUPGHOME" "$KAFKA_DIST.tgz" "$KAFKA_DIST.tgz.asc"
COPY log4j.properties /opt/$KAFKA_DIST/config/
RUN set -x \
&& ln -s /opt/$KAFKA_DIST $KAFKA_HOME \
&& useradd $KAFKA_USER \
&& [ `id -u $KAFKA_USER` -eq 1000 ] \
&& [ `id -g $KAFKA_USER` -eq 1000 ] \
&& mkdir -p $KAFKA_DATA_DIR \
&& chown -R "$KAFKA_USER:$KAFKA_USER" /opt/$KAFKA_DIST \
&& chown -R "$KAFKA_USER:$KAFKA_USER" $KAFKA_DATA_DIR
log4j.properties
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
log4j.rootLogger=${logging.level}, stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=[%d] %p %m (%c)%n
log4j.appender.kafkaAppender=org.apache.log4j.DailyRollingFileAppender
log4j.appender.kafkaAppender.DatePattern='.'yyyy-MM-dd-HH
log4j.appender.kafkaAppender.File=${kafka.logs.dir}/server.log
log4j.appender.kafkaAppender.layout=org.apache.log4j.PatternLayout
log4j.appender.kafkaAppender.layout.ConversionPattern=[%d] %p %m (%c)%n
log4j.appender.stateChangeAppender=org.apache.log4j.DailyRollingFileAppender
log4j.appender.stateChangeAppender.DatePattern='.'yyyy-MM-dd-HH
log4j.appender.stateChangeAppender.File=${kafka.logs.dir}/state-change.log
log4j.appender.stateChangeAppender.layout=org.apache.log4j.PatternLayout
log4j.appender.stateChangeAppender.layout.ConversionPattern=[%d] %p %m (%c)%n
log4j.appender.requestAppender=org.apache.log4j.DailyRollingFileAppender
log4j.appender.requestAppender.DatePattern='.'yyyy-MM-dd-HH
log4j.appender.requestAppender.File=${kafka.logs.dir}/kafka-request.log
log4j.appender.requestAppender.layout=org.apache.log4j.PatternLayout
log4j.appender.requestAppender.layout.ConversionPattern=[%d] %p %m (%c)%n
log4j.appender.cleanerAppender=org.apache.log4j.DailyRollingFileAppender
log4j.appender.cleanerAppender.DatePattern='.'yyyy-MM-dd-HH
log4j.appender.cleanerAppender.File=${kafka.logs.dir}/log-cleaner.log
log4j.appender.cleanerAppender.layout=org.apache.log4j.PatternLayout
log4j.appender.cleanerAppender.layout.ConversionPattern=[%d] %p %m (%c)%n
log4j.appender.controllerAppender=org.apache.log4j.DailyRollingFileAppender
log4j.appender.controllerAppender.DatePattern='.'yyyy-MM-dd-HH
log4j.appender.controllerAppender.File=${kafka.logs.dir}/controller.log
log4j.appender.controllerAppender.layout=org.apache.log4j.PatternLayout
log4j.appender.controllerAppender.layout.ConversionPattern=[%d] %p %m (%c)%n
log4j.appender.authorizerAppender=org.apache.log4j.DailyRollingFileAppender
log4j.appender.authorizerAppender.DatePattern='.'yyyy-MM-dd-HH
log4j.appender.authorizerAppender.File=${kafka.logs.dir}/kafka-authorizer.log
log4j.appender.authorizerAppender.layout=org.apache.log4j.PatternLayout
log4j.appender.authorizerAppender.layout.ConversionPattern=[%d] %p %m (%c)%n
# Turn on all our debugging info
#log4j.logger.kafka.producer.async.DefaultEventHandler=DEBUG, kafkaAppender
#log4j.logger.kafka.client.ClientUtils=DEBUG, kafkaAppender
#log4j.logger.kafka.perf=DEBUG, kafkaAppender
#log4j.logger.kafka.perf.ProducerPerformance$ProducerThread=DEBUG, kafkaAppender
#log4j.logger.org.I0Itec.zkclient.ZkClient=DEBUG
#log4j.logger.kafka=INFO, stdout
log4j.logger.kafka.network.RequestChannel$=WARN, stdout
log4j.additivity.kafka.network.RequestChannel$=false
#log4j.logger.kafka.network.Processor=TRACE, requestAppender
#log4j.logger.kafka.server.KafkaApis=TRACE, requestAppender
#log4j.additivity.kafka.server.KafkaApis=false
log4j.logger.kafka.request.logger=WARN, stdout
log4j.additivity.kafka.request.logger=false
log4j.logger.kafka.controller=TRACE, stdout
log4j.additivity.kafka.controller=false
log4j.logger.kafka.log.LogCleaner=INFO, stdout
log4j.additivity.kafka.log.LogCleaner=false
log4j.logger.state.change.logger=TRACE, stdout
log4j.additivity.state.change.logger=false
#Change this to debug to get the actual audit log for authorizer.
log4j.logger.kafka.authorizer.logger=WARN, stdout
log4j.additivity.kafka.authorizer.logger=false
docker build -t k8s-kafka:latest .
kafka.yaml
apiVersion: v1
kind: Service
metadata:
name: kafka
namespace: kafka
labels:
app: kafka
spec:
selector:
app: kafka
ports:
- port: 9092
name: server
clusterIP: None
---
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
replicas: 3
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
containers:
- name: kafka
image: k8s-kafka:latest
imagePullPolicy: IfNotPresent
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 \
--override zookeeper.connect=zk-0.zk-hs.kafka.svc.cluster.local:2181,zk-1.zk-hs.kafka.svc.cluster.local:2181,zk-2.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=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: data
mountPath: /var/lib/kafka
readinessProbe:
tcpSocket:
port: 9092
timeoutSeconds: 1
initialDelaySeconds: 5
volumes:
- name: data
emptyDir: {
}
securityContext:
runAsUser: 1000
fsGroup: 1000
# volumeClaimTemplates:
# - metadata:
# name: data
# spec:
# accessModes: [ "ReadWriteMany" ]
# storageClassName: nfs-storage
# resources:
# requests:
# storage: 300Mi
kubectl get node
NAME STATUS ROLES AGE VERSION
master1 Ready master 30d v1.14.0
master2 Ready master 30d v1.14.0
node1 Ready <none> 30d v1.14.0
node2 Ready <none> 30d v1.14.0
node3 Ready <none> 30d v1.14.0
kubectl taint node node1 node2 node3 travis.io/schedule-only=kafka:NoSchedule
kubectl label node node1 node2 node3 travis.io/schedule-only=kafka
kubectl apply -f kafka-namespace.yaml
kubectl apply -f zookeeper-headless.yaml
kubectl get pod -n kafka
NAME READY STATUS RESTARTS AGE
zk-0 1/1 Running 0 6m28s
zk-1 1/1 Running 0 5m48s
zk-2 1/1 Running 0 5m22s
kubectl apply -f kafka.yaml
kubectl get pod -n kafka -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
kafka-0 1/1 Running 0 50s 172.10.4.70 node1 <none> <none>
kafka-1 1/1 Running 0 34s 172.10.2.47 node2 <none> <none>
kafka-2 1/1 Running 0 27s 172.10.3.52 node3 <none> <none>
zk-0 1/1 Running 0 8m28s 172.10.4.69 node1 <none> <none>
zk-1 1/1 Running 0 7m48s 172.10.2.46 node2 <none> <none>
zk-2 1/1 Running 0 7m22s 172.10.3.51 node3 <none> <none>
kubectl get svc -n kafka
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kafka ClusterIP None <none> 9092/TCP 3m59s
zk-cs ClusterIP 10.102.25.178 <none> 2181/TCP 11m
zk-hs ClusterIP None <none> 2888/TCP,3888/TCP 11m
- zk测试：
kubectl exec zk-0 cat /opt/zookeeper/conf/zoo.cfg
#This file was autogenerated by k8szk DO NOT EDIT
clientPort=2181
dataDir=/var/lib/zookeeper/data
dataLogDir=/var/lib/zookeeper/log
tickTime=2000
initLimit=10
syncLimit=2000
maxClientCnxns=60
minSessionTimeout= 4000
maxSessionTimeout= 40000
autopurge.snapRetainCount=3
autopurge.purgeInteval=1
server.1=zk-0.zk-hs.kafka.svc.cluster.local:2888:3888
server.2=zk-1.zk-hs.kafka.svc.cluster.local:2888:3888
server.3=zk-2.zk-hs.kafka.svc.cluster.local:2888:3888
kubectl exec zk-0 zkServer.sh status -n kafka
ZooKeeper JMX enabled by default
Using config: /usr/bin/../etc/zookeeper/zoo.cfg
Mode: follower
kubectl exec zk-1 zkServer.sh status -n kafka
ZooKeeper JMX enabled by default
Using config: /usr/bin/../etc/zookeeper/zoo.cfg
Mode: leader
kubectl exec zk-2 zkServer.sh status -n kafka
ZooKeeper JMX enabled by default
Using config: /usr/bin/../etc/zookeeper/zoo.cfg
Mode: follower
kubectl exec zk-0 zkCli.sh create /hello lzx -n kafka
WATCHER::
WatchedEvent state:SyncConnected type:None path:null
Created /hello
kubectl exec -it zk-1 zkCli.sh get /hello -n kafka
WATCHER::
WatchedEvent state:SyncConnected type:None path:null
lzx
cZxid = 0x10000003e
ctime = Fri Jun 12 09:14:05 UTC 2020
mZxid = 0x10000003e
mtime = Fri Jun 12 09:14:05 UTC 2020
pZxid = 0x10000003e
cversion = 0
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 3
numChildren = 0
可以看到，zookeeper集群状态正常，zk-1 是 leader ，在 zk-0 创建的数据在集群中所有的服务上都是可用的。
- kafka测试：
master1 进入 kafka-0 ，创建topic test，进入生产者窗口，
kubectl exec -it kafka-0 bash -n kafka
kafka@kafka-0:/$ kafka-topics.sh --create \
--topic test \
--zookeeper zk-0.zk-hs.kafka.svc.cluster.local:2181,zk-1.zk-hs.kafka.svc.cluster.local:2181,zk-2.zk-hs.kafka.svc.cluster.local:2181 \
--partitions 3 \
--replication-factor 2
Created topic test.
kafka@kafka-0:/$ kafka-topics.sh --list --zookeeper zk-0.zk-hs.kafka.svc.cluster.local:2181,zk-1.zk-hs.kafka.svc.cluster.local:2181,zk-2.zk-hs.kafka.svc.cluster.local:2181
test
kafka@kafka-0:/$ kafka-console-producer.sh --topic test --broker-list localhost:9092
master2 进入 kafka-1 ，进入消费者窗口，
kubectl exec -it kafka-1 bash -n kafka
kafka@kafka-0:/$ kafka-console-consumer.sh --topic test --bootstrap-server localhost:9092
kafka消息的生产和消费正常，kafka集群正常。k8s部署kafka集群完成。
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