本文档详细介绍了如何在Docker中搭建单容器和集群环境的Zookeeper，包括拉取镜像、启动容器、配置zoo.cfg与myid文件、重启容器、查看集群状态以及调整容器端口。同时，文中还提到了原生安装Zookeeper的步骤，确保了服务的正常运行和集群的稳定部署。
目录
一、单容器环境搭建
1.1.1 拉取Zookeeper镜像
[root@k8s-master1 ~]# docker pull zookeeper
Using default tag: latest
^[latest: Pulling from library/zookeeper
a076a628af6f: Pull complete
943d8acaac04: Pull complete
b9998d19c116: Pull complete
6f3bacbd30c2: Pull complete
5bb61178ce00: Pull complete
b2cff6714614: Pull complete
fb3ca86b025f: Pull complete
c4f5b9c9ba49: Pull complete
Digest: sha256:74747e50e76474074b997525046869bbe194ed73f719d880ceac71f4a2e8a2e6
Status: Downloaded newer image for zookeeper:latest
1.1.2 启动容器
[root@k8s-master1 ~]# docker run --name t_zk1 -d zookeeper
35f5f39f0c249511eca1a80122f1ea162e7b8a35fa6ad05a5908dabf462f2c57
1.1.3 查看容器启动日志
docker logs t_zk1
1.1.4 进入容器
docker exec -it t_zk1 bash
1.1.5 安装Vim
apt-get update -y && apt-get install vim -y
1.1.6 编辑*.cfg
vim /conf/zoo.cfg
4lw.commands.whitelist=*
exit
zoo.cfg 最底部添加 " 4lw.commands.whitelist=* " 为了查看运行状态
1.1.7 重启容器与查看容器IP地址
[root@k8s-master1 ~]# docker restart t_zk1 && docker inspect t_zk1 | grep IPAddress
t_zk1
"SecondaryIPAddresses": null,
"IPAddress": "172.17.0.6",
"IPAddress": "172.17.0.6",
1.1.8 通过获取容器IP地址
[root@k8s-master1 ~]# echo stat | nc 172.17.0.6 2181
Zookeeper version: 3.6.2--803c7f1a12f85978cb049af5e4ef23bd8b688715, built on 09/04/2020 12:44 GMT
Clients:
/172.17.0.1:36388[0](queued=0,recved=1,sent=0)
Latency min/avg/max: 0/0.0/0
Received: 1
Sent: 0
Connections: 1
Outstanding: 0
Zxid: 0x0
Mode: standalone
Node count: 5
nc命令用于设置路由器: 如果没有就额外安装 “yum install -y nc”
二、升级集群环境搭建
2.1.1 重覆（一、单容器环境搭建）流程走两次, 分别创建两个容器
[root@k8s-master1 ~]# docker ps | grep zk
edb499903bba zookeeper "/docker-entrypoin..." 7 minutes ago Up 7 minutes 2181/tcp, 2888/tcp, 3888/tcp, 8080/tcp t_zk3
ac26d747d2a1 zookeeper "/docker-entrypoin..." 7 minutes ago Up 7 minutes 2181/tcp, 2888/tcp, 3888/tcp, 8080/tcp t_zk2
35f5f39f0c24 zookeeper "/docker-entrypoin..." 26 minutes ago Up 14 minutes 2181/tcp, 2888/tcp, 3888/tcp, 8080/tcp t_zk1
容器对应IP 地址：
t_zk1: “172.17.0.6”
t_zk2: “172.17.0.7”
t_zk3: “172.17.0.8”
2.1.2 分别进入t_zk1、t_zk2、t_zk3, 编辑 zoo.cfg 文件
vim /conf/zoo.cfg
dataDir=/data
dataLogDir=/datalog
tickTime=2000
initLimit=5
syncLimit=2
autopurge.snapRetainCount=3
autopurge.purgeInterval=0
maxClientCnxns=60
standaloneEnabled=true
admin.enableServer=true
#server.1=localhost:2888:3888;2181 ## 屏蔽
4lw.commands.whitelist=*
clientPort=2181 ## 新增
server.1=172.17.0.6:2888:3888 ## 新增
server.2=172.17.0.7:2888:3888 ## 新增
server.3=172.17.0.8:2888:3888 ## 新增
2888:zookeeper之间通信的端口 3888:zookeeper之间投票选举的端口
2.1.3 分别进入t_zk1、t_zk2、t_zk3, 编辑 zoo.cfg 文件
vim /data/myid
1
t_zk2、t_zk3同上配置，t_zk2的myid是2，t_zk3的myid是3
2.1.4 重启所有容器
docker restart t_zk1 t_zk2 t_zk3
2.1.5 查看集群是否部署成功
[root@k8s-master1 ~]# echo stat | nc 172.17.0.6 2181
Zookeeper version: 3.6.2--803c7f1a12f85978cb049af5e4ef23bd8b688715, built on 09/04/2020 12:44 GMT
Clients:
/172.17.0.1:47102[0](queued=0,recved=1,sent=0)
Latency min/avg/max: 0/0.0/0
Received: 1
Sent: 0
Connections: 1
Outstanding: 0
Zxid: 0x0
Mode: follower
Node count: 5
[root@k8s-master1 ~]# echo stat | nc 172.17.0.7 2181
Zookeeper version: 3.6.2--803c7f1a12f85978cb049af5e4ef23bd8b688715, built on 09/04/2020 12:44 GMT
Clients:
/172.17.0.1:59276[0](queued=0,recved=1,sent=0)
Latency min/avg/max: 0/0.0/0
Received: 1
Sent: 0
Connections: 1
Outstanding: 0
Zxid: 0x200000000
Mode: leader
Node count: 5
Proposal sizes last/min/max: -1/-1/-1
[root@k8s-master1 ~]# echo stat | nc 172.17.0.8 2181
Zookeeper version: 3.6.2--803c7f1a12f85978cb049af5e4ef23bd8b688715, built on 09/04/2020 12:44 GMT
Clients:
/172.17.0.1:43118[0](queued=0,recved=1,sent=0)
Latency min/avg/max: 0/0.0/0
Received: 1
Sent: 0
Connections: 1
Outstanding: 0
Zxid: 0x200000000
Mode: follower
Node count: 5
留意每个字节的Mode字段, t_zk2 是 leader 其余是 follower
三、调正容器端口
由于之前docker run时候没有指定好宿主机与容器映射端口, 导致外部调用API失败。
3.1.1 获取容器id
[root@k8s-master1 ~]# docker ps | grep t_zk | awk '{ print $1 }'
edb499903bba
ac26d747d2a1
35f5f39f0c24
3.1.2 停止t_zk{1,2,3}容器
docker stop t_zk1 t_zk2 t_zk3
3.1.3 停止Docker所有服务
systemctl stop docker
3.1.4 进入宿主中的容器目录，根据上面提示容器id查找
如果之前没有端口映射, 应该有这样的一段:
“PortBindings”:{}
增加一个映射, 这样写:
“PortBindings”:{“2181/tcp”:[{“HostIp”:"",“HostPort”:“2181”}]}
前一个数字是容器端口, 后一个是宿主机端口.
而修改现有端口映射更简单, 把端口号改掉就行.
这里以zk1为例，其他两个分别修改为2181->2182，2181->2183
t_zk1 - edb499903bba
修改前
[root@k8s-master1 ~]# vim /var/lib/docker/containers/edb499903bba5a046b9e6d25faa5b065d06ac2bc408e567aa40c861544401909/hostconfig.json
{"Binds":null,"ContainerIDFile":"","LogConfig":{"Type":"json-file","Config":{}},"NetworkMode":"default","PortBindings":{},"RestartPolicy":{"Name":"no","MaximumRetryCount":0},"AutoRemove":false,"VolumeDriver":"","VolumesFrom"
:null,"CapAdd":null,"CapDrop":null,"Dns":[],"DnsOptions":[],"DnsSearch":[],"ExtraHosts":null,"GroupAdd":null,"IpcMode":"","Cgroup":"","Links":[],"OomScoreAdj":0,"PidMode":"","Privileged":false,"PublishAllPorts":false,"Readon
lyRootfs":false,"SecurityOpt":null,"UTSMode":"","UsernsMode":"","ShmSize":67108864,"Runtime":"runc","ConsoleSize":[0,0],"Isolation":"","CpuShares":0,"Memory":0,"NanoCpus":0,"CgroupParent":"","BlkioWeight":0,"BlkioWeightDevic
e":null,"BlkioDeviceReadBps":null,"BlkioDeviceWriteBps":null,"BlkioDeviceReadIOps":null,"BlkioDeviceWriteIOps":null,"CpuPeriod":0,"CpuQuota":0,"CpuRealtimePeriod":0,"CpuRealtimeRuntime":0,"CpusetCpus":"","CpusetMems":"","Dev
es":[],"DiskQuota":0,"KernelMemory":0,"MemoryReservation":0,"MemorySwap":0,"MemorySwappiness":-1,"OomKillDisable":false,"PidsLimit":0,"Ulimits":null,"CpuCount":0,"CpuPercent":0,"IOMaximumIOps":0,"IOMaximumBandwidth":0}
修改后
[root@k8s-master1 ~]# vim /var/lib/docker/containers/ac26d747d2a1182e419df3016ffd911f15689a4e972b0428aa8f45b0cc610d62/hostconfig.json
{"Binds":null,"ContainerIDFile":"","LogConfig":{"Type":"json-file","Config":{}},"NetworkMode":"default","PortBindings":{"2181/tcp":[{"HostIp":"","HostPort":"2182"}]},"RestartPolicy":{"Name":"no","MaximumRetryCount":0},"AutoR
emove":false,"VolumeDriver":"","VolumesFrom":null,"CapAdd":null,"CapDrop":null,"Dns":[],"DnsOptions":[],"DnsSearch":[],"ExtraHosts":null,"GroupAdd":null,"IpcMode":"","Cgroup":"","Links":[],"OomScoreAdj":0,"PidMode":"","Privi
leged":false,"PublishAllPorts":false,"ReadonlyRootfs":false,"SecurityOpt":null,"UTSMode":"","UsernsMode":"","ShmSize":67108864,"Runtime":"runc","ConsoleSize":[0,0],"Isolation":"","CpuShares":0,"Memory":0,"NanoCpus":0,"Cgroup
Parent":"","BlkioWeight":0,"BlkioWeightDevice":null,"BlkioDeviceReadBps":null,"BlkioDeviceWriteBps":null,"BlkioDeviceReadIOps":null,"BlkioDeviceWriteIOps":null,"CpuPeriod":0,"CpuQuota":0,"CpuRealtimePeriod":0,"CpuRealtimeRun
me":0,"CpusetCpus":"","CpusetMems":"","Devices":[],"DiskQuota":0,"KernelMemory":0,"MemoryReservation":0,"MemorySwap":0,"MemorySwappiness":-1,"OomKillDisable":false,"PidsLimit":0,"Ulimits":null,"CpuCount":0,"CpuPercent":0,"
IOMaximumIOps":0,"IOMaximumBandwidth":0}
剩余两个容器同样方法修改
3.1.5 启动Docker与服务
systemctl start docker && docker start t_zk1 t_zk2 t_zk3
3.1.6 对比端口是否新增完成
[root@k8s-master1 ~]# docker ps | grep t_zk
edb499903bba zookeeper "/docker-entrypoin..." About an hour ago Up 8 minutes 2181/tcp, 2888/tcp, 3888/tcp, 8080/tcp t_zk3
ac26d747d2a1 zookeeper "/docker-entrypoin..." About an hour ago Up 8 minutes 2181/tcp, 2888/tcp, 3888/tcp, 8080/tcp t_zk2
35f5f39f0c24 zookeeper "/docker-entrypoin..." About an hour ago Up 8 minutes 2181/tcp, 2888/tcp, 3888/tcp, 8080/tcp t_zk1
[root@k8s-master1 ~]# docker ps | grep t_zk
edb499903bba zookeeper "/docker-entrypoin..." About an hour ago Up 6 minutes 2888/tcp, 3888/tcp, 0.0.0.0:2181->2181/tcp, 8080/tcp t_zk3
ac26d747d2a1 zookeeper "/docker-entrypoin..." About an hour ago Up 6 minutes 2888/tcp, 3888/tcp, 8080/tcp, 0.0.0.0:2182->2181/tcp t_zk2
35f5f39f0c24 zookeeper "/docker-entrypoin..." About an hour ago Up 6 minutes 2888/tcp, 3888/tcp, 8080/tcp, 0.0.0.0:2183->2181/tcp t_zk1
四、原生安装方式（单机版）
4.1.1 下载Zookeeper最新版本
4.1.2 配置文件
- 打开文件夹/usr/local/apache-zookeeper-3.6.2-bin/conf
- 将zoo_sample.cfg 复制一份命名为zoo.cfg
4.1.3 Start Zookeeper
- 打开文件夹/usr/local/apache-zookeeper-3.6.2-bin/bin
- Mac执行命令行执行 ./zkServer.sh start
- Windows同学执行对应的cmd文件
启动完成以后出现这个就代表着启动成功
ZooKeeper JMX enabled by default
Using config: /usr/local/apache-zookeeper-3.5.5/bin/…/conf/zoo.cfg
Starting zookeeper … STARTED
4.1.4 验证
./zkCli.sh
最后打印出一堆东西最后一行是
WatchedEvent state:SyncConnected type:None path:null
4.1.5 停止
./zkServer.sh stop
扫一扫
705
被折叠的 条评论
为什么被折叠?
到【灌水乐园】发言
