- 下载官方zookeeper镜像
- 搜索官方镜像
- 下载官方镜像
- 查看镜像元数据
- 创建docker网络
- 新建bridge网络
- 创建挂载路径
- 创建容器并加入网络
- 查看节点状态
- 集群生成脚本
- 参考文献
$ docker search zookeeper
NAME DESCRIPTION STARS OFFICIAL AUTOMATED
zookeeper Apache ZooKeeper is an open-source server wh… 1216 [OK]
...
$ docker pull zookeeper
Using default tag: latest
latest: Pulling from library/zookeeper
a2abf6c4d29d: Pull complete
2bbde5250315: Pull complete
202a34e7968e: Pull complete
4e4231e30efc: Pull complete
707593b95343: Pull complete
b070e6dedb4b: Pull complete
46e5380f3905: Pull complete
8b7e330117e6: Pull complete
Digest: sha256:2c8c5c2db6db22184e197afde13e33dad849af90004c330f20b17282bcd5afd7
Status: Downloaded newer image for zookeeper:latest
docker.io/library/zookeeper:latest
$ docker inspect zookeeper
[
{
"Id": "sha256:36c607e7b14df07e3976ebe6216db9aabd41ef0884f73d4e6b5ccf5d44d9c195",
"RepoTags": [
"zookeeper:latest"
],
"RepoDigests": [
"zookeeper@sha256:2c8c5c2db6db22184e197afde13e33dad849af90004c330f20b17282bcd5afd7"
],
"Parent": "",
"Comment": "",
"Created": "2021-12-22T18:17:20.28518457Z",
"Container": "086e5b0d9ac03c033e92402c9a0ac04376e6c4530f798549645a0fb834edc180",
"ContainerConfig": {
"Hostname": "086e5b0d9ac0",
"Domainname": "",
"User": "",
"AttachStdin": false,
"AttachStdout": false,
"AttachStderr": false,
"ExposedPorts": {
"2181/tcp": {},
"2888/tcp": {},
"3888/tcp": {},
"8080/tcp": {}
},
"Tty": false,
"OpenStdin": false,
"StdinOnce": false,
"Env": [
"PATH=/usr/local/openjdk-11/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/apache-zookeeper-3.7.0-bin/bin",
"JAVA_HOME=/usr/local/openjdk-11",
"LANG=C.UTF-8",
"JAVA_VERSION=11.0.13",
"ZOO_CONF_DIR=/conf",
"ZOO_DATA_DIR=/data",
"ZOO_DATA_LOG_DIR=/datalog",
"ZOO_LOG_DIR=/logs",
"ZOO_TICK_TIME=2000",
"ZOO_INIT_LIMIT=5",
"ZOO_SYNC_LIMIT=2",
"ZOO_AUTOPURGE_PURGEINTERVAL=0",
"ZOO_AUTOPURGE_SNAPRETAINCOUNT=3",
"ZOO_MAX_CLIENT_CNXNS=60",
"ZOO_STANDALONE_ENABLED=true",
"ZOO_ADMINSERVER_ENABLED=true",
"ZOOCFGDIR=/conf"
],
"Cmd": [
"/bin/sh",
"-c",
"#(nop) ",
"CMD [\"zkServer.sh\" \"start-foreground\"]"
],
"Image": "sha256:034a6fb5e9094c790fd637c3b8098df0dbeacd0327461859e79f3ca268f4e6c9",
"Volumes": {
"/data": {},
"/datalog": {},
"/logs": {}
},
"WorkingDir": "/apache-zookeeper-3.7.0-bin",
"Entrypoint": [
"/docker-entrypoint.sh"
],
"OnBuild": null,
"Labels": {}
},
"DockerVersion": "20.10.7",
"Author": "",
"Config": {
"Hostname": "",
"Domainname": "",
"User": "",
"AttachStdin": false,
"AttachStdout": false,
"AttachStderr": false,
"ExposedPorts": {
"2181/tcp": {},
"2888/tcp": {},
"3888/tcp": {},
"8080/tcp": {}
},
"Tty": false,
"OpenStdin": false,
"StdinOnce": false,
"Env": [
"PATH=/usr/local/openjdk-11/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/apache-zookeeper-3.7.0-bin/bin",
"JAVA_HOME=/usr/local/openjdk-11",
"LANG=C.UTF-8",
"JAVA_VERSION=11.0.13",
"ZOO_CONF_DIR=/conf",
"ZOO_DATA_DIR=/data",
"ZOO_DATA_LOG_DIR=/datalog",
"ZOO_LOG_DIR=/logs",
"ZOO_TICK_TIME=2000",
"ZOO_INIT_LIMIT=5",
"ZOO_SYNC_LIMIT=2",
"ZOO_AUTOPURGE_PURGEINTERVAL=0",
"ZOO_AUTOPURGE_SNAPRETAINCOUNT=3",
"ZOO_MAX_CLIENT_CNXNS=60",
"ZOO_STANDALONE_ENABLED=true",
"ZOO_ADMINSERVER_ENABLED=true",
"ZOOCFGDIR=/conf"
],
"Cmd": [
"zkServer.sh",
"start-foreground"
],
"Image": "sha256:034a6fb5e9094c790fd637c3b8098df0dbeacd0327461859e79f3ca268f4e6c9",
"Volumes": {
"/data": {},
"/datalog": {},
"/logs": {}
},
"WorkingDir": "/apache-zookeeper-3.7.0-bin",
"Entrypoint": [
"/docker-entrypoint.sh"
],
"OnBuild": null,
"Labels": null
},
"Architecture": "amd64",
"Os": "linux",
"Size": 277821092,
"VirtualSize": 277821092,
"GraphDriver": {
"Data": {
"LowerDir": "/var/lib/docker/overlay2/49465b4bfe0763fa582987f66ace8500f7855a68e5d78e97c015d2a59f34d983/diff:/var/lib/docker/overlay2/2ce2eda42d094c73fb77c3957ca0c164a3629c53a50048319fbde62a1e5e05b8/diff:/var/lib/docker/overlay2/b67d2bc434b170f11b0e1549e68446ada1234db1acc42fc58284f745d5a93204/diff:/var/lib/docker/overlay2/b82b007f28635d8601982206284c3aa1e0ca29f40f75dc03ed48f901df64dea7/diff:/var/lib/docker/overlay2/63aa7a8639204ccb5c393d04ab28c11048fd0cb367e9264f9e710e1a08fbbdde/diff:/var/lib/docker/overlay2/a6ffcae54ad0cbbc9d04b1bf46d14c13dc92c533223464e2eb86acc92df509bf/diff:/var/lib/docker/overlay2/968d924353f2cf0f7226df1d44a28557ae4a473e853a4cfea72a49bf79feb3ce/diff",
"MergedDir": "/var/lib/docker/overlay2/decf5b31c5806d0d0065958867be916743e953ee67518bddaabc4a677a822036/merged",
"UpperDir": "/var/lib/docker/overlay2/decf5b31c5806d0d0065958867be916743e953ee67518bddaabc4a677a822036/diff",
"WorkDir": "/var/lib/docker/overlay2/decf5b31c5806d0d0065958867be916743e953ee67518bddaabc4a677a822036/work"
},
"Name": "overlay2"
},
"RootFS": {
"Type": "layers",
"Layers": [
"sha256:2edcec3590a4ec7f40cf0743c15d78fb39d8326bc029073b41ef9727da6c851f",
"sha256:afda989d53ee25f18b7810206b39580df30518043d1f34f1d514f665ba8026f4",
"sha256:c3aa798711862658bf26a9c0d64e917e737ddfe89558554b02d22022694f45d7",
"sha256:d0771a598f012fdd2b325314c006c37843f6be2f59d30a862a68c6c17f27e2b8",
"sha256:2490c30bbef3f75a4c1a4874b9eb550f90eec35c4ec098e4734ae6e52d67a6fa",
"sha256:00510f82f2cdfb4a39f994b7461d1bad936998a355f7baac29821ef92a4f5ad4",
"sha256:b2f57731deef9b512cf5cef75f1f373c4869e6e6d9740181f31cad4aa564b890",
"sha256:73d59a6eacae0c15469ec7fa4f219be70cc9a2bda526b181340903d200531cc8"
]
},
"Metadata": {
"LastTagTime": "0001-01-01T00:00:00Z"
}
}
]
通过元数据，主要是了解如下信息：
- 暴露端口：
"ExposedPorts": {
"2181/tcp": {},
"2888/tcp": {},
"3888/tcp": {},
"8080/tcp": {}
},
- 挂载文件位置：
"Volumes": {
"/data": {},
"/datalog": {},
"/logs": {}
},
- 环境变量，如
Docker有三种网络模式，bridge、host、none，在创建容器的时候，不指定 --network 默认是bridge模式
- bridge：为每一个容器分配IP，并将容器连接到一个docker0虚拟网桥，通过docker0网桥与宿主机通信。此模式下，不能用宿主机IP+容器映射端口来进行Docker容器之间的通信。
- host：容器不会虚拟自己的网卡，配置自己的IP，而是使用宿主机的IP和端口。此模式下，Docker容器之间的通信使用宿主机IP+容器映射端口
- none：无网络
$ docker network create --driver bridge --subnet=172.88.0.0/16 --gateway=172.88.0.1 bnet
$ docker network ls
NETWORK ID NAME DRIVER SCOPE
0eb12f8968c5 bnet bridge local
$ docker inspect 0eb12f8968c5
[
{
"Name": "bnet",
"Id": "0eb12f8968c5b102ca6955f8ad31be525a1f89d0da7c3e8e24bf492e35c9bbde",
"Created": "2022-04-19T19:17:23.127433237+08:00",
"Scope": "local",
"Driver": "bridge",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": {},
"Config": [
{
"Subnet": "172.88.0.0/16",
"Gateway": "172.88.0.1"
}
]
},
"Internal": false,
"Attachable": false,
"Ingress": false,
"ConfigFrom": {
"Network": ""
},
"ConfigOnly": false,
"Containers": {},
"Options": {},
"Labels": {}
}
]
实际路径看情况修改，假设建立3节点集群
mkdir -p $PWD/zookeeper_nodes/node_1
mkdir -p $PWD/zookeeper_nodes/node_2
mkdir -p $PWD/zookeeper_nodes/node_3
docker run -d -p 2181:2181 --name zookeeper_1 --privileged --restart always --network bnet --ip 172.88.0.2 \
-v $PWD/zookeeper_nodes/node_1/volumes/data:/data \
-v $PWD/zookeeper_nodes/node_1/volumes/datalog:/datalog \
-v $PWD/zookeeper_nodes/node_1/volumes/logs:/logs \
-e ZOO_MY_ID=1 \
-e "ZOO_SERVERS=server.1=172.88.0.2:2888:3888;2181 server.2=172.88.0.3:2888:3888;2181 server.3=172.88.0.4:2888:3888;2181" \
zookeeper:latest
docker run -d -p 2182:2181 --name zookeeper_2 --privileged --restart always --network bnet --ip 172.88.0.3 \
-v $PWD/zookeeper_nodes/node_2/volumes/data:/data \
-v $PWD/zookeeper_nodes/node_2/volumes/datalog:/datalog \
-v $PWD/zookeeper_nodes/node_2/volumes/logs:/logs \
-e ZOO_MY_ID=2 \
-e "ZOO_SERVERS=server.1=172.88.0.2:2888:3888;2181 server.2=172.88.0.3:2888:3888;2181 server.3=172.88.0.4:2888:3888;2181" \
zookeeper:latest
docker run -d -p 2183:2181 --name zookeeper_3 --privileged --restart always --network bnet --ip 172.88.0.4 \
-v $PWD/zookeeper_nodes/node_3/volumes/data:/data \
-v $PWD/zookeeper_nodes/node_3/volumes/datalog:/datalog \
-v $PWD/zookeeper_nodes/node_3/volumes/logs:/logs \
-e ZOO_MY_ID=3 \
-e "ZOO_SERVERS=server.1=172.88.0.2:2888:3888;2181 server.2=172.88.0.3:2888:3888;2181 server.3=172.88.0.4:2888:3888;2181" \
zookeeper:latest
$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
614f30e10235 zookeeper:latest "/docker-entrypoint.…" 4 minutes ago Up 4 minutes 2888/tcp, 3888/tcp, 8080/tcp, 0.0.0.0:2183->2181/tcp, :::2183->2181/tcp zookeeper_3
5aac903dae27 zookeeper:latest "/docker-entrypoint.…" 4 minutes ago Up 4 minutes 2888/tcp, 3888/tcp, 8080/tcp, 0.0.0.0:2182->2181/tcp, :::2182->2181/tcp zookeeper_2
67b2fd1b3df6 zookeeper:latest "/docker-entrypoint.…" 4 minutes ago Up 4 minutes 2888/tcp, 3888/tcp, 8080/tcp, 0.0.0.0:2181->2181/tcp, :::2181->2181/tcp zookeeper_1
$ docker exec -it zookeeper_1 bash
root@67b2fd1b3df6:/apache-zookeeper-3.7.0-bin# ./bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /conf/zoo.cfg
Client port found: 2181. Client address: localhost. Client SSL: false.
Mode: follower
$ docker exec -it zookeeper_2 bash
root@5aac903dae27:/apache-zookeeper-3.7.0-bin# ./bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /conf/zoo.cfg
Client port found: 2181. Client address: localhost. Client SSL: false.
Mode: leader
$ docker exec -it zookeeper_3 bash
root@614f30e10235:/apache-zookeeper-3.7.0-bin# ./bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /conf/zoo.cfg
Client port found: 2181. Client address: localhost. Client SSL: false.
Mode: follower
此外，可以测试创建节点，此不赘述
集群生成脚本#!/bin/bash
echo "删除所有zookeeper容器"
sudo docker ps -a | grep zookeeper_ | awk '{print }' | xargs -I {} sudo docker rm -f {}
# 设置节点个数
num_nodes=3
if [ $# -ge 1 ] && [ -ge 0 ];then
num_nodes=
fi
# 设置存储位置
data_path=/data/zookeeper_nodes
if [ -d $data_path ];then
sudo rm -rf $data_path
fi
# 设置集群IP
ip_prefix="172.88.0"
servers=""
for i in `seq $num_nodes`; do
servers="$servers server.$i=zookeeper_$i:2888:3888;2181"
done
servers=${servers#* }
temp_file="init_containers.sh"
echo > $temp_file
for i in `seq $num_nodes`; do
cmd="sudo docker run -d
-p `expr 2181 + $i`:2181
--name zookeeper_$i
--hostname zookeeper_$i
--privileged
--restart always
--network bnet
--ip $ip_prefix.`expr $i + 1`
-v $data_path/zookeeper_nodes/node_$i/volumes/data:/data
-v $data_path/zookeeper_nodes/node_$i/volumes/datalog:/datalog
-v $data_path/zookeeper_nodes/node_$i/volumes/logs:/logs
-e ZOO_MY_ID=$i
-e ZOO_SERVERS='$servers'
zookeeper:latest"
echo $cmd >> $temp_file
echo >> $temp_file
done
echo "创建具有$num_nodes个节点的zookeeper集群"
sh $temp_file && rm -f $temp_file
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