基于k8s的zookeeper搭建
1.官方
https://kafka.apache.org
2.k8s部署
2.1. 编译镜像
Dockerfile
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=$PATH:/opt/kafka/bin
ARG KAFKA_VERSION=3.3.2
ARG SCALA_VERSION=2.13
RUN set -x \
&& apt-get update \
&& apt-get install -y openjdk-8-jre-headless wget gpg vim curl\
&& wget -q "https://downloads.apache.org/kafka/$KAFKA_VERSION/kafka_$SCALA_VERSION-$KAFKA_VERSION.tgz" \
&& wget -q "https://downloads.apache.org/kafka/$KAFKA_VERSION/kafka_$SCALA_VERSION-$KAFKA_VERSION.tgz.asc" \
&& wget -q "https://downloads.apache.org/kafka/KEYS" \
&& export GNUPGHOME="$(mktemp -d)" \
&& gpg --import KEYS \
&& gpg --batch --verify "kafka_$SCALA_VERSION-$KAFKA_VERSION.tgz.asc" "kafka_$SCALA_VERSION-$KAFKA_VERSION.tgz"\
&& tar -xzf "kafka_$SCALA_VERSION-$KAFKA_VERSION.tgz" -C /opt \
&& rm -r "$GNUPGHOME" "kafka_$SCALA_VERSION-$KAFKA_VERSION.tgz" "kafka_$SCALA_VERSION-$KAFKA_VERSION.tgz.asc"
RUN set -x \
&& ln -s /opt/kafka_$SCALA_VERSION-$KAFKA_VERSION $KAFKA_HOME \
&& useradd $KAFKA_USER \
&& mkdir -p $KAFKA_DATA_DIR \
&& chown -R "$KAFKA_USER:$KAFKA_USER" $KAFKA_HOME \
&& chown -R "$KAFKA_USER:$KAFKA_USER" $KAFKA_DATA_DIR
编译:
sudo docker build -t duruo850/kafka:v3.3.2 .
2.2. PersistentVolume部署
PersistentVolume.yaml
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: kafka-pv1
labels:
type: kafka
spec:
storageClassName: kafka
capacity:
storage: 300Mi
accessModes:
- ReadWriteMany
hostPath:
path: "/opt/zookeeper_data1"
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: kafka-pv2
labels:
type: kafka
spec:
storageClassName: kafka
capacity:
storage: 300Mi
accessModes:
- ReadWriteMany
hostPath:
path: "/opt/zookeeper_data2"
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: kafka-pv3
labels:
type: kafka
spec:
storageClassName: kafka
capacity:
storage: 300Mi
accessModes:
- ReadWriteMany
hostPath:
path: "/opt/zookeeper_data3"
3个PersistentVolume的hostPath必须是不同路径,如果部署在不同机器上面可以相同路径。
sudo kubectl apply -f PersistentVolume.yaml
2.3. 设置namespace
namespace.yaml
apiVersion: v1
kind: Namespace
metadata:
name: kafka
部署namespace:
sudo kubectl apply -f namespace.yaml
2.4. k8s部署kafka
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
template:
metadata:
labels:
app: kafka
spec:
toleration:
- key: "node-role.kubernetes.io/master"
operator: "Exists"
effect: "NoSchedule"
# nodeSelector:
# deploy-queue: "yes"
# 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
securityContext:
runAsUser: 1000
fsGroup: 1000
containers:
- name: kafka
imagePullPolicy: Always
image: duruo850/kafka:v3.3.2
resources:
requests:
memory: "100Mi"
cpu: 100m
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.zookeeper.svc.cluster.local:2181,zk-1.zk-hs.zookeeper.svc.cluster.local:2181,zk-2.zk-hs.zookeeper.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=o.11.0.3 \
--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 \
--override security.inter.broker.protocol=SASL_PLAINTEXT \
--override sasl.enabled.mechanisms=PLAIN \
--override sasl.mechanism.inter.broker.protocol=PLAIN"
env:
- name: KAFKA_HEAP_OPTS
value: "-Xmx512M -Xms512M"
- name: KAFKA_OPTS
value: "-Dlogging.level=INFO -Djava.security.auth.login.config=/opt/kafka/config/kafka_server_jaas.conf"
volumeMounts:
- name: datadir
mountPath: /var/lib/kafka
readinessProbe:
tcpSocket:
port: 9092
timeoutSeconds: 1
initialDelaySeconds: 5
volumeClaimTemplates:
- metadata:
name: datadir
spec:
accessModes: [ "ReadWriteMany" ]
storageClassName: kafka
resources:
requests:
storage: 300Mi
nodeSelector/affinity根据实际情况设定
2.2. 部署说明
2.2.1. PersistentVolume配置:
zookeeper 依赖与PersistentVolume, 需要优先创建3个PersistentVolume
volumeClaimTemplates:
- metadata:
name: datadir
spec:
accessModes: [ "ReadWriteOnce" ]
resources:
requests:
storage: 200Mi
2.2.2.
2.2.3. 用户配置:
zookeeper默认启动的用户是容器内部的zookeeper,用户id为1000, 用户组id为1000
securityContext:
runAsUser: 1000
fsGroup: 1000
启动用户需要确保给予PersistentVolume的硬盘路径访问权限:
sudo chown -R 1000:1000 /opt/zookeeper_data1
sudo chown -R 1000:1000 /opt/zookeeper_data2
sudo chown -R 1000:1000 /opt/zookeeper_data3
2.2.4. 亲和性配置:
affinity:
podAntiAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
- labelSelector:
matchExpressions:
- key: "app"
operator: In
values:
- zk
topologyKey: "kubernetes.io/hostname"
zookeeper默认配置podAntiAffinity反亲和力配置,一个节点只能部署1个pod
如果只有1台机器的话,就把它去除,我是就2个节点,所以部署的时候就把亲和性删除了。
2.3.部署
sudo kubectl apply -f zookeeper.yaml
3.验证基本功能
3.1.查看某个pod的配置文件
sudo kubectl exec -it zk-0 -- cat /opt/zookeeper/conf/zoo.cfg
qiteck@server:~/program/docker_service/zookeeper$ sudo kubectl exec -it zk-0 -- cat /opt/zookeeper/conf/zoo.cfg
#This file was autogenerated DO NOT EDIT
clientPort=2181
dataDir=/var/lib/zookeeper/data
dataLogDir=/var/lib/zookeeper/data/log
tickTime=2000
initLimit=10
syncLimit=5
maxClientCnxns=60
minSessionTimeout=4000
maxSessionTimeout=40000
autopurge.snapRetainCount=3
autopurge.purgeInteval=12
server.1=zk-0.zk-hs.default.svc.cluster.local:2888:3888
server.2=zk-1.zk-hs.default.svc.cluster.local:2888:3888
server.3=zk-2.zk-hs.default.svc.cluster.local:2888:3888
3.2.获取zookeeper的完整主机名
for i in 0 1 2; do kubectl exec zk-$i -- hostname -f; done
qiteck@server:~/program/docker_service/zookeeper$ for i in 0 1 2; do kubectl exec zk-$i -- hostname -f; done
zk-0.zk-hs.default.svc.cluster.local
zk-1.zk-hs.default.svc.cluster.local
zk-2.zk-hs.default.svc.cluster.local
3.3.查看集群状态--3个节点的角色
for i in 0 1 2; do kubectl exec zk-$i -- zkServer.sh status; done
qiteck@server:~/program/docker_service/zookeeper$ for i in 0 1 2; do kubectl exec zk-$i -- zkServer.sh status; done
ZooKeeper JMX enabled by default
Using config: /usr/bin/../etc/zookeeper/zoo.cfg
Mode: follower
ZooKeeper JMX enabled by default
Using config: /usr/bin/../etc/zookeeper/zoo.cfg
Mode: leader
ZooKeeper JMX enabled by default
Using config: /usr/bin/../etc/zookeeper/zoo.cfg
Mode: follower
3.4.查看myid
for i in 0 1 2; do echo -n "zk-$i"; kubectl exec zk-$i -- cat /var/lib/zookeeper/data/myid; done
qiteck@server:~/program/docker_service/zookeeper$ for i in 0 1 2; do echo -n "zk-$i"; kubectl exec zk-$i -- cat /var/lib/zookeeper/data/myid; done
zk-01
zk-11
zk-21
3.5.在其他pod去ping zookeeper主机
sudo kubectl exec -it account-6468847985-2fqpf -- ping zk-0.zk-hs.default.svc.cluster.local
qiteck@server:~/program/docker_service/zookeeper$ sudo kubectl exec -it account-6468847985-2fqpf -- ping zk-0.zk-hs.default.svc.cluster.local
PING zk-0.zk-hs.default.svc.cluster.local (10.244.1.9) 56(84) bytes of data.
64 bytes from zk-0.zk-hs.default.svc.cluster.local (10.244.1.9): icmp_seq=1 ttl=64 time=0.340 ms
64 bytes from zk-0.zk-hs.default.svc.cluster.local (10.244.1.9): icmp_seq=2 ttl=64 time=0.071 ms
64 bytes from zk-0.zk-hs.default.svc.cluster.local (10.244.1.9): icmp_seq=3 ttl=64 time=0.053 ms
^C
--- zk-0.zk-hs.default.svc.cluster.local ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2031ms
sudo kubectl exec -it account-6468847985-2fqpf -- ping zk-1.zk-hs.default.svc.cluster.local
qiteck@server:~/program/docker_service/zookeeper$ sudo kubectl exec -it account-6468847985-2fqpf -- ping zk-1.zk-hs.default.svc.cluster.local
PING zk-1.zk-hs.default.svc.cluster.local (10.244.1.10) 56(84) bytes of data.
64 bytes from 10-244-1-10.zk-cs.default.svc.cluster.local (10.244.1.10): icmp_seq=1 ttl=64 time=0.226 ms
64 bytes from 10-244-1-10.zk-cs.default.svc.cluster.local (10.244.1.10): icmp_seq=2 ttl=64 time=0.044 ms
64 bytes from 10-244-1-10.zk-cs.default.svc.cluster.local (10.244.1.10): icmp_seq=3 ttl=64 time=0.042 ms
^C
--- zk-1.zk-hs.default.svc.cluster.local ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2038ms
rtt min/avg/max/mdev = 0.042/0.104/0.226/0.086 ms
sudo kubectl exec -it account-6468847985-2fqpf -- ping zk-2.zk-hs.default.svc.cluster.local
qiteck@server:~/program/docker_service/zookeeper$ sudo kubectl exec -it account-6468847985-2fqpf -- ping zk-2.zk-hs.default.svc.cluster.local
PING zk-2.zk-hs.default.svc.cluster.local (10.244.1.11) 56(84) bytes of data.
64 bytes from zk-2.zk-hs.default.svc.cluster.local (10.244.1.11): icmp_seq=1 ttl=64 time=0.308 ms
64 bytes from zk-2.zk-hs.default.svc.cluster.local (10.244.1.11): icmp_seq=2 ttl=64 time=0.080 ms
64 bytes from zk-2.zk-hs.default.svc.cluster.local (10.244.1.11): icmp_seq=3 ttl=64 time=0.295 ms
^C
--- zk-2.zk-hs.default.svc.cluster.local ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2024ms
rtt min/avg/max/mdev = 0.080/0.227/0.308/0.105 ms
4.验证集群功能
4.1.在0容器创建数据
进入0容器,执行zkCli.sh客户端,执行create /zk-test hsssss, 获取一下是否看对不对get /zk-test
qiteck@server:~/program/docker_service/zookeeper$ sudo kubectl exec -it zk-0 -- /bin/bash
root@zk-0:/# zkCli.sh
Connecting to localhost:2181
2023-01-31 08:49:55,163 [myid:] - INFO [main:Environment@100] - Client environment:zookeeper.version=3.4.10-39d3a4f269333c922ed3db283be479f9deacaa0f, built on 03/23/2017 10:13 GMT
2023-01-31 08:49:55,166 [myid:] - INFO [main:Environment@100] - Client environment:host.name=zk-0.zk-hs.default.svc.cluster.local
2023-01-31 08:49:55,167 [myid:] - INFO [main:Environment@100] - Client environment:java.version=1.8.0_131
2023-01-31 08:49:55,170 [myid:] - INFO [main:Environment@100] - Client environment:java.vendor=Oracle Corporation
2023-01-31 08:49:55,170 [myid:] - INFO [main:Environment@100] - Client environment:java.home=/usr/lib/jvm/java-8-openjdk-amd64/jre
2023-01-31 08:49:55,170 [myid:] - INFO [main:Environment@100] - Client environment:java.class.path=/usr/bin/../build/classes:/usr/bin/../build/lib/*.jar:/usr/bin/../share/zookeeper/zookeeper-3.4.10.jar:/usr/bin/../share/zookeeper/slf4j-log4j12-1.6.1.jar:/usr/bin/../share/zookeeper/slf4j-api-1.6.1.jar:/usr/bin/../share/zookeeper/netty-3.10.5.Final.jar:/usr/bin/../share/zookeeper/log4j-1.2.16.jar:/usr/bin/../share/zookeeper/jline-0.9.94.jar:/usr/bin/../src/java/lib/*.jar:/usr/bin/../etc/zookeeper:
2023-01-31 08:49:55,171 [myid:] - INFO [main:Environment@100] - Client environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib/x86_64-linux-gnu/jni:/lib/x86_64-linux-gnu:/usr/lib/x86_64-linux-gnu:/usr/lib/jni:/lib:/usr/lib
2023-01-31 08:49:55,171 [myid:] - INFO [main:Environment@100] - Client environment:java.io.tmpdir=/tmp
2023-01-31 08:49:55,171 [myid:] - INFO [main:Environment@100] - Client environment:java.compiler=<NA>
2023-01-31 08:49:55,172 [myid:] - INFO [main:Environment@100] - Client environment:os.name=Linux
2023-01-31 08:49:55,172 [myid:] - INFO [main:Environment@100] - Client environment:os.arch=amd64
2023-01-31 08:49:55,172 [myid:] - INFO [main:Environment@100] - Client environment:os.version=5.15.0-50-generic
2023-01-31 08:49:55,173 [myid:] - INFO [main:Environment@100] - Client environment:user.name=root
2023-01-31 08:49:55,173 [myid:] - INFO [main:Environment@100] - Client environment:user.home=/root
2023-01-31 08:49:55,173 [myid:] - INFO [main:Environment@100] - Client environment:user.dir=/
2023-01-31 08:49:55,175 [myid:] - INFO [main:ZooKeeper@438] - Initiating client connection, connectString=localhost:2181 sessionTimeout=30000 watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@22d8cfe0
Welcome to ZooKeeper!
2023-01-31 08:49:55,234 [myid:] - INFO [main-SendThread(localhost:2181):ClientCnxn$SendThread@1032] - Opening socket connection to server localhost/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)
JLine support is enabled
2023-01-31 08:49:55,410 [myid:] - INFO [main-SendThread(localhost:2181):ClientCnxn$SendThread@876] - Socket connection established to localhost/127.0.0.1:2181, initiating session
[zk: localhost:2181(CONNECTING) 0] 2023-01-31 08:49:55,494 [myid:] - INFO [main-SendThread(localhost:2181):ClientCnxn$SendThread@1299] - Session establishment complete on server localhost/127.0.0.1:2181, sessionid = 0x18606fc8b4a0000, negotiated timeout = 30000
WATCHER::
WatchedEvent state:SyncConnected type:None path:null
[zk: localhost:2181(CONNECTED) 0]
[zk: localhost:2181(CONNECTED) 0] create /zk-test hsssss
Created /zk-test
[zk: localhost:2181(CONNECTED) 1] get /zk-test
hsssss
cZxid = 0x100000002
ctime = Tue Jan 31 08:50:53 UTC 2023
mZxid = 0x100000002
mtime = Tue Jan 31 08:50:53 UTC 2023
pZxid = 0x100000002
cversion = 0
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 6
numChildren = 0
4.2.在1容器获取数据
进入1容器,执行zkCli.sh客户端,获取数据验证get /zk-test
qiteck@server:~/program/docker_service/zookeeper$ sudo kubectl exec -it zk-1 -- /bin/bash
root@zk-1:/# zkCli.sh
Connecting to localhost:2181
2023-01-31 08:51:55,701 [myid:] - INFO [main:Environment@100] - Client environment:zookeeper.version=3.4.10-39d3a4f269333c922ed3db283be479f9deacaa0f, built on 03/23/2017 10:13 GMT
2023-01-31 08:51:55,710 [myid:] - INFO [main:Environment@100] - Client environment:host.name=zk-1.zk-hs.default.svc.cluster.local
2023-01-31 08:51:55,713 [myid:] - INFO [main:Environment@100] - Client environment:java.version=1.8.0_131
2023-01-31 08:51:55,717 [myid:] - INFO [main:Environment@100] - Client environment:java.vendor=Oracle Corporation
2023-01-31 08:51:55,721 [myid:] - INFO [main:Environment@100] - Client environment:java.home=/usr/lib/jvm/java-8-openjdk-amd64/jre
2023-01-31 08:51:55,721 [myid:] - INFO [main:Environment@100] - Client environment:java.class.path=/usr/bin/../build/classes:/usr/bin/../build/lib/*.jar:/usr/bin/../share/zookeeper/zookeeper-3.4.10.jar:/usr/bin/../share/zookeeper/slf4j-log4j12-1.6.1.jar:/usr/bin/../share/zookeeper/slf4j-api-1.6.1.jar:/usr/bin/../share/zookeeper/netty-3.10.5.Final.jar:/usr/bin/../share/zookeeper/log4j-1.2.16.jar:/usr/bin/../share/zookeeper/jline-0.9.94.jar:/usr/bin/../src/java/lib/*.jar:/usr/bin/../etc/zookeeper:
2023-01-31 08:51:55,722 [myid:] - INFO [main:Environment@100] - Client environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib/x86_64-linux-gnu/jni:/lib/x86_64-linux-gnu:/usr/lib/x86_64-linux-gnu:/usr/lib/jni:/lib:/usr/lib
2023-01-31 08:51:55,722 [myid:] - INFO [main:Environment@100] - Client environment:java.io.tmpdir=/tmp
2023-01-31 08:51:55,722 [myid:] - INFO [main:Environment@100] - Client environment:java.compiler=<NA>
2023-01-31 08:51:55,723 [myid:] - INFO [main:Environment@100] - Client environment:os.name=Linux
2023-01-31 08:51:55,723 [myid:] - INFO [main:Environment@100] - Client environment:os.arch=amd64
2023-01-31 08:51:55,724 [myid:] - INFO [main:Environment@100] - Client environment:os.version=5.15.0-50-generic
2023-01-31 08:51:55,725 [myid:] - INFO [main:Environment@100] - Client environment:user.name=root
2023-01-31 08:51:55,725 [myid:] - INFO [main:Environment@100] - Client environment:user.home=/root
2023-01-31 08:51:55,726 [myid:] - INFO [main:Environment@100] - Client environment:user.dir=/
2023-01-31 08:51:55,730 [myid:] - INFO [main:ZooKeeper@438] - Initiating client connection, connectString=localhost:2181 sessionTimeout=30000 watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@22d8cfe0
Welcome to ZooKeeper!
2023-01-31 08:51:55,777 [myid:] - INFO [main-SendThread(localhost:2181):ClientCnxn$SendThread@1032] - Opening socket connection to server localhost/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)
JLine support is enabled
2023-01-31 08:51:55,943 [myid:] - INFO [main-SendThread(localhost:2181):ClientCnxn$SendThread@876] - Socket connection established to localhost/127.0.0.1:2181, initiating session
[zk: localhost:2181(CONNECTING) 0] 2023-01-31 08:51:56,014 [myid:] - INFO [main-SendThread(localhost:2181):ClientCnxn$SendThread@1299] - Session establishment complete on server localhost/127.0.0.1:2181, sessionid = 0x28606fc8ba00000, negotiated timeout = 30000
WATCHER::
WatchedEvent state:SyncConnected type:None path:null
[zk: localhost:2181(CONNECTED) 0] get /zk-test
hsssss
cZxid = 0x100000002
ctime = Tue Jan 31 08:50:53 UTC 2023
mZxid = 0x100000002
mtime = Tue Jan 31 08:50:53 UTC 2023
pZxid = 0x100000002
cversion = 0
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 6
numChildren = 0
可以取到/zk-test对应的数据 hsssss
4.3.删除pod,验证pod挂掉验证集群是否能恢复正常:
qiteck@server:~/program/docker_service/zookeeper$ sudo kubectl get pods -l app=zk
NAME READY STATUS RESTARTS AGE
zk-0 1/1 Running 0 15m
zk-1 1/1 Running 0 15m
zk-2 1/1 Running 0 15m
qiteck@server:~/program/docker_service/zookeeper$ sudo kubectl delete pods zk-1 zk-0
pod "zk-1" deleted
pod "zk-0" deleted
qiteck@server:~/program/docker_service/zookeeper$ sudo kubectl get pods -l app=zk -w
NAME READY STATUS RESTARTS AGE
zk-0 1/1 Running 0 65s
zk-1 1/1 Running 0 44s
zk-2 1/1 Running 0 16m
可以看到,zk-0,zk-1再删除以后会自动创建,集群能够恢复
4.4.验证恢复后的集群状态:
for i in 0 1 2; do kubectl exec zk-$i -- zkServer.sh status; done
qiteck@server:~/program/docker_service/zookeeper$ for i in 0 1 2; do kubectl exec zk-$i -- zkServer.sh status; done
ZooKeeper JMX enabled by default
Using config: /usr/bin/../etc/zookeeper/zoo.cfg
Mode: follower
ZooKeeper JMX enabled by default
Using config: /usr/bin/../etc/zookeeper/zoo.cfg
Mode: leader
ZooKeeper JMX enabled by default
Using config: /usr/bin/../etc/zookeeper/zoo.cfg
Mode: follower
4.5.验证新的节点数据是否正常:
再次进入0容器,执行zkCli.sh客户端,获取数据get /zk-test
qiteck@server:~/program/docker_service/zookeeper$ sudo kubectl exec -it zk-0 -- /bin/bash
root@zk-0:/# zkCli.sh
Connecting to localhost:2181
2023-01-31 09:00:14,553 [myid:] - INFO [main:Environment@100] - Client environment:zookeeper.version=3.4.10-39d3a4f269333c922ed3db283be479f9deacaa0f, built on 03/23/2017 10:13 GMT
2023-01-31 09:00:14,556 [myid:] - INFO [main:Environment@100] - Client environment:host.name=zk-0.zk-hs.default.svc.cluster.local
2023-01-31 09:00:14,556 [myid:] - INFO [main:Environment@100] - Client environment:java.version=1.8.0_131
2023-01-31 09:00:14,559 [myid:] - INFO [main:Environment@100] - Client environment:java.vendor=Oracle Corporation
2023-01-31 09:00:14,559 [myid:] - INFO [main:Environment@100] - Client environment:java.home=/usr/lib/jvm/java-8-openjdk-amd64/jre
2023-01-31 09:00:14,559 [myid:] - INFO [main:Environment@100] - Client environment:java.class.path=/usr/bin/../build/classes:/usr/bin/../build/lib/*.jar:/usr/bin/../share/zookeeper/zookeeper-3.4.10.jar:/usr/bin/../share/zookeeper/slf4j-log4j12-1.6.1.jar:/usr/bin/../share/zookeeper/slf4j-api-1.6.1.jar:/usr/bin/../share/zookeeper/netty-3.10.5.Final.jar:/usr/bin/../share/zookeeper/log4j-1.2.16.jar:/usr/bin/../share/zookeeper/jline-0.9.94.jar:/usr/bin/../src/java/lib/*.jar:/usr/bin/../etc/zookeeper:
2023-01-31 09:00:14,559 [myid:] - INFO [main:Environment@100] - Client environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib/x86_64-linux-gnu/jni:/lib/x86_64-linux-gnu:/usr/lib/x86_64-linux-gnu:/usr/lib/jni:/lib:/usr/lib
2023-01-31 09:00:14,559 [myid:] - INFO [main:Environment@100] - Client environment:java.io.tmpdir=/tmp
2023-01-31 09:00:14,559 [myid:] - INFO [main:Environment@100] - Client environment:java.compiler=<NA>
2023-01-31 09:00:14,560 [myid:] - INFO [main:Environment@100] - Client environment:os.name=Linux
2023-01-31 09:00:14,560 [myid:] - INFO [main:Environment@100] - Client environment:os.arch=amd64
2023-01-31 09:00:14,560 [myid:] - INFO [main:Environment@100] - Client environment:os.version=5.15.0-50-generic
2023-01-31 09:00:14,560 [myid:] - INFO [main:Environment@100] - Client environment:user.name=root
2023-01-31 09:00:14,560 [myid:] - INFO [main:Environment@100] - Client environment:user.home=/root
2023-01-31 09:00:14,561 [myid:] - INFO [main:Environment@100] - Client environment:user.dir=/
2023-01-31 09:00:14,562 [myid:] - INFO [main:ZooKeeper@438] - Initiating client connection, connectString=localhost:2181 sessionTimeout=30000 watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@22d8cfe0
Welcome to ZooKeeper!
2023-01-31 09:00:14,594 [myid:] - INFO [main-SendThread(localhost:2181):ClientCnxn$SendThread@1032] - Opening socket connection to server localhost/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)
JLine support is enabled
2023-01-31 09:00:14,738 [myid:] - INFO [main-SendThread(localhost:2181):ClientCnxn$SendThread@876] - Socket connection established to localhost/127.0.0.1:2181, initiating session
[zk: localhost:2181(CONNECTING) 0] 2023-01-31 09:00:14,808 [myid:] - INFO [main-SendThread(localhost:2181):ClientCnxn$SendThread@1299] - Session establishment complete on server localhost/127.0.0.1:2181, sessionid = 0x186070b91d80000, negotiated timeout = 30000
WATCHER::
WatchedEvent state:SyncConnected type:None path:null
[zk: localhost:2181(CONNECTED) 0] get /zk-test
hsssss
cZxid = 0x100000002
ctime = Tue Jan 31 08:50:53 UTC 2023
mZxid = 0x100000002
mtime = Tue Jan 31 08:50:53 UTC 2023
pZxid = 0x100000002
cversion = 0
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 6
numChildren = 0
可以看到获取zk-test的数据还是hssss
至此zookeeper的功能是正常的。
分类:
中间件
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