启动Docker后，先看一下我们有哪些选择。
有官方的当然选择官方啦~
下载：
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查看镜像详情
[root@localhost admin]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
192.168.192.128:443/hello-2 latest 0c24558dd388 42 hours ago 660 MB
192.168.192.128:443/hello latest a3ba3d430bed 42 hours ago 660 MB
docker.io/nginx latest 5a3221f0137b 13 days ago 126 MB
docker.io/zookeeper latest 3487af26dee9 13 days ago 225 MB
docker.io/registry latest f32a97de94e1 5 months ago 25.8 MB
docker.io/mongo latest 8bf72137439e 12 months ago 380 MB
docker.io/influxdb latest 34de2bdc2d7f 12 months ago 213 MB
docker.io/centos latest 5182e96772bf 12 months ago 200 MB
docker.io/grafana/grafana latest 3e16e05be9a3 13 months ago 245 MB
docker.io/hello-world latest 2cb0d9787c4d 13 months ago 1.85 kB
docker.io/java latest d23bdf5b1b1b 2 years ago 643 MB
[root@localhost admin]# docker inspect 3487af26dee9
[{"Id": "sha256:3487af26dee9ef9eacee9a97521bc4f0243bef0b285247258c32f4a03cab92c5","RepoTags": ["docker.io/zookeeper:latest"],"RepoDigests": ["docker.io/zookeeper@sha256:175d6bb1471e1e37a48bfa41a9da047c80fade60fd585eae3a0e08a4ce1d39ed"],"Parent": "","Comment": "","Created": "2019-08-15T06:10:50.178554969Z","Container": "9a38467115f1952161d6075135d5c5287967282b834cfe68183339c810f9652b","ContainerConfig": {"Hostname": "9a38467115f1","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-8/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/apache-zookeeper-3.5.5-bin/bin","LANG=C.UTF-8","JAVA_HOME=/usr/local/openjdk-8","JAVA_VERSION=8u222","JAVA_BASE_URL=https://github.com/AdoptOpenJDK/openjdk8-upstream-binaries/releases/download/jdk8u222-b10/OpenJDK8U-jre_","JAVA_URL_VERSION=8u222b10","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"]"],"ArgsEscaped": true,"Image": "sha256:20bf3cc1bd5b5766b79da5265e94007d0802ce241df1636d0f63e211a79a0e3e","Volumes": {"/data": {},"/datalog": {},"/logs": {}},"WorkingDir": "/apache-zookeeper-3.5.5-bin","Entrypoint": ["/docker-entrypoint.sh"],"OnBuild": null,"Labels": {}},"DockerVersion": "18.06.1-ce","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-8/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/apache-zookeeper-3.5.5-bin/bin","LANG=C.UTF-8","JAVA_HOME=/usr/local/openjdk-8","JAVA_VERSION=8u222","JAVA_BASE_URL=https://github.com/AdoptOpenJDK/openjdk8-upstream-binaries/releases/download/jdk8u222-b10/OpenJDK8U-jre_","JAVA_URL_VERSION=8u222b10","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"],"ArgsEscaped": true,"Image": "sha256:20bf3cc1bd5b5766b79da5265e94007d0802ce241df1636d0f63e211a79a0e3e","Volumes": {"/data": {},"/datalog": {},"/logs": {}},"WorkingDir": "/apache-zookeeper-3.5.5-bin","Entrypoint": ["/docker-entrypoint.sh"],"OnBuild": null,"Labels": null},"Architecture": "amd64","Os": "linux","Size": 225126346,"VirtualSize": 225126346,"GraphDriver": {"Name": "overlay2","Data": {"LowerDir": "/var/lib/docker/overlay2/92185ebf7638a7b34180cfb87795dd758405cbad4fd0139b92a227d1a4b61847/diff:/var/lib/docker/overlay2/8787e91f5c03a7c03cee072019eca49a0402a0a0902be39ed0b5d651a79cce35/diff:/var/lib/docker/overlay2/ce5864ddfa4d1478047aa9fcaa03744e8a4078ebe43b41e7836c96c54c724044/diff:/var/lib/docker/overlay2/fc99437bcfbabb9e8234c06c90d1c60e58c34ac053aff1adc368b7ad3a50c158/diff:/var/lib/docker/overlay2/1779297a8980830229bd4bf58bd741730956d6797332fd07b863a1b48dcb6fa2/diff:/var/lib/docker/overlay2/ee735aa3608d890ac4751dd93581a67cb54a5dd4714081e9d09d0ebd9dbc3501/diff:/var/lib/docker/overlay2/cf6b3cbc42f3c8d1fb09b29db0dafbb4dceb120925970ab8a3871eaa8562414c/diff","MergedDir": "/var/lib/docker/overlay2/a7fcc1b78c472cde943f20d1d4495f145308507b5fe3da8800c33dc4ce426156/merged","UpperDir": "/var/lib/docker/overlay2/a7fcc1b78c472cde943f20d1d4495f145308507b5fe3da8800c33dc4ce426156/diff","WorkDir": "/var/lib/docker/overlay2/a7fcc1b78c472cde943f20d1d4495f145308507b5fe3da8800c33dc4ce426156/work"}},"RootFS": {"Type": "layers","Layers": ["sha256:1c95c77433e8d7bf0f519c9d8c9ca967e2603f0defbf379130d9a841cca2e28e","sha256:2bf534399acac9c6b09a0b1d931223808000b04400a749f08187ed9ee435738d","sha256:eb25e0278d41b9ac637d8cb2e391457cf44ce8d2bfe0646d0c9faefc96413f91","sha256:e54bd3566d9ef3e1309a5af6caf8682f32c6ac4d6adfcbd3e601cfee4e2e0e85","sha256:c79435051d529a7b86f5f9fc32e7e2ec401929434e5596f02a2af731f55c9f28","sha256:76e0d7b2d700e6d17924b985703c7b5b84fb39ddcc0a1181b41217c2a11dffc4","sha256:eecdc37df6afd77091641588f9639f63b65e8eb141e56529e00da44419c5bd04","sha256:36e788f2d91a89375df5901f31cca33776f887c00ddfd3cf9f2466fa4cb794d6"]}}
]
默认拉取最新的是3.5.X版本，如果你需要3.4.X版本的，要指定标签
单机
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在外部访问（192.168.192.128:2181）
集群
环境：单台宿主机（192.168.192.128），启动三个zookeeper容器。
这里涉及一个问题，就是Docker容器之间通信的问题，这个很重要！
Docker有三种网络模式，bridge、host、none，在你创建容器的时候，不指定–network默认是bridge。
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。也就是说，此模式下，你不能用宿主机的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。这样一来，Docker容器之间的通信就可以用宿主机的IP+容器映射端口
none：无网络。
=====================================================
先在本地创建目录：
[root@localhost admin]# mkdir /usr/local/zookeeper-cluster [root@localhost admin]# mkdir /usr/local/zookeeper-cluster/node1 [root@localhost admin]# mkdir /usr/local/zookeeper-cluster/node2 [root@localhost admin]# mkdir /usr/local/zookeeper-cluster/node3 [root@localhost admin]# ll /usr/local/zookeeper-cluster/ total 0 drwxr-xr-x. 2 root root 6 Aug 28 23:02 node1 drwxr-xr-x. 2 root root 6 Aug 28 23:02 node2 drwxr-xr-x. 2 root root 6 Aug 28 23:02 node3
然后执行命令启动
docker run -d -p 2181:2181 -p 2888:2888 -p 3888:3888 --name zookeeper_node1 --privileged --restart always -v /usr/local/zookeeper-cluster/node1/volumes/data:/data -v /usr/local/zookeeper-cluster/node1/volumes/datalog:/datalog -v /usr/local/zookeeper-cluster/node1/volumes/logs:/logs -e ZOO_MY_ID=1 -e "ZOO_SERVERS=server.1=192.168.192.128:2888:3888;2181 server.2=192.168.192.128:2889:3889;2182 server.3=192.168.192.128:2890:3890;2183" 3487af26dee9docker run -d -p 2182:2181 -p 2889:2888 -p 3889:3888 --name zookeeper_node2 --privileged --restart always -v /usr/local/zookeeper-cluster/node2/volumes/data:/data -v /usr/local/zookeeper-cluster/node2/volumes/datalog:/datalog -v /usr/local/zookeeper-cluster/node2/volumes/logs:/logs -e ZOO_MY_ID=2 -e "ZOO_SERVERS=server.1=192.168.192.128:2888:3888;2181 server.2=192.168.192.128:2889:3889;2182 server.3=192.168.192.128:2890:3890;2183" 3487af26dee9docker run -d -p 2183:2181 -p 2890:2888 -p 3890:3888 --name zookeeper_node3 --privileged --restart always -v /usr/local/zookeeper-cluster/node3/volumes/data:/data -v /usr/local/zookeeper-cluster/node3/volumes/datalog:/datalog -v /usr/local/zookeeper-cluster/node3/volumes/logs:/logs -e ZOO_MY_ID=3 -e "ZOO_SERVERS=server.1=192.168.192.128:2888:3888;2181 server.2=192.168.192.128:2889:3889;2182 server.3=192.168.192.128:2890:3890;2183" 3487af26dee9
【坑】
乍一看，没什么问题啊，首先映射端口到宿主机，然后三个zookeeper之间的访问地址则是宿主机IP:映射端口，没毛病啊；
看我前面讲的网络模式就能看出问题，ZOO_SERVERS里面的IP有问题，犯这个错误都是不了解Docker的网络模式的。什么错误往下看。
关于ZOO_SERVERS
什么意思呢，3.5.0开始，不应该再使用clientPort和clientPortAddress配置参数。相反，这些信息现在是server关键字规范的一部分。
端口映射三个容器不一样，比如2181/2182/2183，因为是一台宿主机嘛，端口不能冲突，如果你不在同一台机器，就不用修改端口。
最后的那个参数是镜像ID，也可以是镜像名称:TAG。
–privileged=true参数是为了解决【chown: changing ownership of '/data': Permission denied】，也可以省略true
执行结果：
[root@localhost admin]# docker run -d -p 2181:2181 -p 2888:2888 -p 3888:3888 --name zookeeper_node1 --privileged --restart always > -v /usr/local/zookeeper-cluster/node1/volumes/data:/data > -v /usr/local/zookeeper-cluster/node1/volumes/datalog:/datalog > -v /usr/local/zookeeper-cluster/node1/volumes/logs:/logs > -e ZOO_MY_ID=1 > -e "ZOO_SERVERS=server.1=192.168.192.128:2888:3888;2181 server.2=192.168.192.128:2889:3889;2182 server.3=192.168.192.128:2890:3890;2183" 3487af26dee9 4bfa6bbeb936037e178a577e5efbd06d4a963e91d67274413b933fd189917776 [root@localhost admin]# docker run -d -p 2182:2181 -p 2889:2888 -p 3889:3888 --name zookeeper_node2 --privileged --restart always > -v /usr/local/zookeeper-cluster/node2/volumes/data:/data > -v /usr/local/zookeeper-cluster/node2/volumes/datalog:/datalog > -v /usr/local/zookeeper-cluster/node2/volumes/logs:/logs > -e ZOO_MY_ID=2 > -e "ZOO_SERVERS=server.1=192.168.192.128:2888:3888;2181 server.2=192.168.192.128:2889:3889;2182 server.3=192.168.192.128:2890:3890;2183" 3487af26dee9 dbb7f1f323a09869d043152a4995e73bad5f615fd81bf11143fd1c28180f9869 [root@localhost admin]# docker run -d -p 2183:2181 -p 2890:2888 -p 3890:3888 --name zookeeper_node3 --privileged --restart always > -v /usr/local/zookeeper-cluster/node3/volumes/data:/data > -v /usr/local/zookeeper-cluster/node3/volumes/datalog:/datalog > -v /usr/local/zookeeper-cluster/node3/volumes/logs:/logs > -e ZOO_MY_ID=3 > -e "ZOO_SERVERS=server.1=192.168.192.128:2888:3888;2181 server.2=192.168.192.128:2889:3889;2182 server.3=192.168.192.128:2890:3890;2183" 3487af26dee9 6dabae1d92f0e861cc7515c014c293f80075c2762b254fc56312a6d3b450a919 [root@localhost admin]#
查看启动的容器
[root@localhost admin]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 6dabae1d92f0 3487af26dee9 "/docker-entrypoin..." 31 seconds ago Up 29 seconds 8080/tcp, 0.0.0.0:2183->2181/tcp, 0.0.0.0:2890->2888/tcp, 0.0.0.0:3890->3888/tcp zookeeper_node3 dbb7f1f323a0 3487af26dee9 "/docker-entrypoin..." 36 seconds ago Up 35 seconds 8080/tcp, 0.0.0.0:2182->2181/tcp, 0.0.0.0:2889->2888/tcp, 0.0.0.0:3889->3888/tcp zookeeper_node2 4bfa6bbeb936 3487af26dee9 "/docker-entrypoin..." 46 seconds ago Up 45 seconds 0.0.0.0:2181->2181/tcp, 0.0.0.0:2888->2888/tcp, 0.0.0.0:3888->3888/tcp, 8080/tcp zookeeper_node1 [root@localhost admin]#
不是说有错误吗？怎么还启动成功了？？我们来看下节点1的启动日志
[root@localhost admin]# docker logs -f 4bfa6bbeb936 ZooKeeper JMX enabled by default...2019-08-29 09:20:22,665 [myid:1] - WARN [WorkerSender[myid=1]:QuorumCnxManager@677] - Cannot open channel to 2 at election address /192.168.192.128:3889 java.net.ConnectException: Connection refused (Connection refused)at java.net.PlainSocketImpl.socketConnect(Native Method)at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)at java.net.Socket.connect(Socket.java:589)at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:648)at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:705)at org.apache.zookeeper.server.quorum.QuorumCnxManager.toSend(QuorumCnxManager.java:618)at org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.process(FastLeaderElection.java:477)at org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.run(FastLeaderElection.java:456)at java.lang.Thread.run(Thread.java:748) 2019-08-29 09:20:22,666 [myid:1] - WARN [WorkerSender[myid=1]:QuorumCnxManager@677] - Cannot open channel to 3 at election address /192.168.192.128:3890 java.net.ConnectException: Connection refused (Connection refused)at java.net.PlainSocketImpl.socketConnect(Native Method)at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)at java.net.Socket.connect(Socket.java:589)at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:648)at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:705)at org.apache.zookeeper.server.quorum.QuorumCnxManager.toSend(QuorumCnxManager.java:618)at org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.process(FastLeaderElection.java:477)at org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.run(FastLeaderElection.java:456)at java.lang.Thread.run(Thread.java:748)
连接不上2 和 3，为什么呢，因为在默认的Docker网络模式下，通过宿主机的IP+映射端口，根本找不到啊！他们有自己的IP啊！如下：
[root@localhost admin]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
6dabae1d92f0 3487af26dee9 "/docker-entrypoin..." 5 minutes ago Up 5 minutes 8080/tcp, 0.0.0.0:2183->2181/tcp, 0.0.0.0:2890->2888/tcp, 0.0.0.0:3890->3888/tcp zookeeper_node3
dbb7f1f323a0 3487af26dee9 "/docker-entrypoin..." 6 minutes ago Up 6 minutes 8080/tcp, 0.0.0.0:2182->2181/tcp, 0.0.0.0:2889->2888/tcp, 0.0.0.0:3889->3888/tcp zookeeper_node2
4bfa6bbeb936 3487af26dee9 "/docker-entrypoin..." 6 minutes ago Up 6 minutes 0.0.0.0:2181->2181/tcp, 0.0.0.0:2888->2888/tcp, 0.0.0.0:3888->3888/tcp, 8080/tcp zookeeper_node1[root@localhost admin]# docker inspect 4bfa6bbeb936"Networks": {"bridge": {"IPAMConfig": null,"Links": null,"Aliases": null,"NetworkID": "5fc1ce4362afe3d34fdf260ab0174c36fe4b7daf2189702eae48101a755079f3","EndpointID": "368237e4c903cc663111f1fe33ac4626a9100fb5a22aec85f5eccbc6968a1631","Gateway": "172.17.0.1","IPAddress": "172.17.0.2","IPPrefixLen": 16,"IPv6Gateway": "","GlobalIPv6Address": "","GlobalIPv6PrefixLen": 0,"MacAddress": "02:42:ac:11:00:02"}}}}
][root@localhost admin]# docker inspect dbb7f1f323a0"Networks": {"bridge": {"IPAMConfig": null,"Links": null,"Aliases": null,"NetworkID": "5fc1ce4362afe3d34fdf260ab0174c36fe4b7daf2189702eae48101a755079f3","EndpointID": "8a9734044a566d5ddcd7cbbf6661abb2730742f7c73bd8733ede9ed8ef106659","Gateway": "172.17.0.1","IPAddress": "172.17.0.3","IPPrefixLen": 16,"IPv6Gateway": "","GlobalIPv6Address": "","GlobalIPv6PrefixLen": 0,"MacAddress": "02:42:ac:11:00:03"}}}}
][root@localhost admin]# docker inspect 6dabae1d92f0"Networks": {"bridge": {"IPAMConfig": null,"Links": null,"Aliases": null,"NetworkID": "5fc1ce4362afe3d34fdf260ab0174c36fe4b7daf2189702eae48101a755079f3","EndpointID": "b10329b9940a07aacb016d8d136511ec388de02bf3bd0e0b50f7f4cbb7f138ec","Gateway": "172.17.0.1","IPAddress": "172.17.0.4","IPPrefixLen": 16,"IPv6Gateway": "","GlobalIPv6Address": "","GlobalIPv6PrefixLen": 0,"MacAddress": "02:42:ac:11:00:04"}}}}
]
node1—172.17.0.2
node2—172.17.0.3
node3—172.17.0.4
既然我们知道了它有自己的IP，那又出现另一个问题了，就是它的ip是动态的，启动之前我们无法得知。有个解决办法就是创建自己的bridge网络，然后创建容器的时候指定ip。
【正确方式开始】
[root@localhost admin]# docker network create --driver bridge --subnet=172.18.0.0/16 --gateway=172.18.0.1 zoonet
8257c501652a214d27efdf5ef71ff38bfe222c3a2a7898be24b8df9db1fb3b13
[root@localhost admin]# docker network ls
NETWORK ID NAME DRIVER SCOPE
5fc1ce4362af bridge bridge local
6aa33e21444e host host local
20e563b93ce9 none null local
8257c501652a zoonet bridge local
[root@localhost admin]# docker network inspect 8257c501652a
[{"Name": "zoonet","Id": "8257c501652a214d27efdf5ef71ff38bfe222c3a2a7898be24b8df9db1fb3b13","Created": "2019-08-29T06:08:01.442601483-04:00","Scope": "local","Driver": "bridge","EnableIPv6": false,"IPAM": {"Driver": "default","Options": {},"Config": [{"Subnet": "172.18.0.0/16","Gateway": "172.18.0.1"}]},"Internal": false,"Attachable": false,"Containers": {},"Options": {},"Labels": {}}
]
然后我们修改一下zookeeper容器的创建命令。
docker run -d -p 2181:2181 --name zookeeper_node1 --privileged --restart always --network zoonet --ip 172.18.0.2 -v /usr/local/zookeeper-cluster/node1/volumes/data:/data -v /usr/local/zookeeper-cluster/node1/volumes/datalog:/datalog -v /usr/local/zookeeper-cluster/node1/volumes/logs:/logs -e ZOO_MY_ID=1 -e "ZOO_SERVERS=server.1=172.18.0.2:2888:3888;2181 server.2=172.18.0.3:2888:3888;2181 server.3=172.18.0.4:2888:3888;2181" 3487af26dee9docker run -d -p 2182:2181 --name zookeeper_node2 --privileged --restart always --network zoonet --ip 172.18.0.3 -v /usr/local/zookeeper-cluster/node2/volumes/data:/data -v /usr/local/zookeeper-cluster/node2/volumes/datalog:/datalog -v /usr/local/zookeeper-cluster/node2/volumes/logs:/logs -e ZOO_MY_ID=2 -e "ZOO_SERVERS=server.1=172.18.0.2:2888:3888;2181 server.2=172.18.0.3:2888:3888;2181 server.3=172.18.0.4:2888:3888;2181" 3487af26dee9docker run -d -p 2183:2181 --name zookeeper_node3 --privileged --restart always --network zoonet --ip 172.18.0.4 -v /usr/local/zookeeper-cluster/node3/volumes/data:/data -v /usr/local/zookeeper-cluster/node3/volumes/datalog:/datalog -v /usr/local/zookeeper-cluster/node3/volumes/logs:/logs -e ZOO_MY_ID=3 -e "ZOO_SERVERS=server.1=172.18.0.2:2888:3888;2181 server.2=172.18.0.3:2888:3888;2181 server.3=172.18.0.4:2888:3888;2181" 3487af26dee9
1. 由于2888 、3888 不需要暴露，就不映射了；
2. 指定自己的网络，并指定IP；
3. 每个容器之间环境是隔离的，所以容器内所用的端口一样：2181/2888/3888
运行结果：
[root@localhost admin]# docker run -d -p 2181:2181 --name zookeeper_node1 --privileged --restart always --network zoonet --ip 172.18.0.2 > -v /usr/local/zookeeper-cluster/node1/volumes/data:/data > -v /usr/local/zookeeper-cluster/node1/volumes/datalog:/datalog > -v /usr/local/zookeeper-cluster/node1/volumes/logs:/logs > -e ZOO_MY_ID=1 > -e "ZOO_SERVERS=server.1=172.18.0.2:2888:3888;2181 server.2=172.18.0.3:2888:3888;2181 server.3=172.18.0.4:2888:3888;2181" 3487af26dee9 50c07cf11fab2d3b4da6d8ce48d8ed4a7beaab7d51dd542b8309f781e9920c36 [root@localhost admin]# docker run -d -p 2182:2181 --name zookeeper_node2 --privileged --restart always --network zoonet --ip 172.18.0.3 > -v /usr/local/zookeeper-cluster/node2/volumes/data:/data > -v /usr/local/zookeeper-cluster/node2/volumes/datalog:/datalog > -v /usr/local/zookeeper-cluster/node2/volumes/logs:/logs > -e ZOO_MY_ID=2 > -e "ZOO_SERVERS=server.1=172.18.0.2:2888:3888;2181 server.2=172.18.0.3:2888:3888;2181 server.3=172.18.0.4:2888:3888;2181" 3487af26dee9 649a4dbfb694504acfe4b8e11b990877964477bb41f8a230bd191cba7d20996f [root@localhost admin]# docker run -d -p 2183:2181 --name zookeeper_node3 --privileged --restart always --network zoonet --ip 172.18.0.4 > -v /usr/local/zookeeper-cluster/node3/volumes/data:/data > -v /usr/local/zookeeper-cluster/node3/volumes/datalog:/datalog > -v /usr/local/zookeeper-cluster/node3/volumes/logs:/logs > -e ZOO_MY_ID=3 > -e "ZOO_SERVERS=server.1=172.18.0.2:2888:3888;2181 server.2=172.18.0.3:2888:3888;2181 server.3=172.18.0.4:2888:3888;2181" 3487af26dee9 c8bc1b9ae9adf86e9c7f6a3264f883206c6d0e4f6093db3200de80ef39f57160 [root@localhost admin]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES c8bc1b9ae9ad 3487af26dee9 "/docker-entrypoin..." 17 seconds ago Up 16 seconds 2888/tcp, 3888/tcp, 8080/tcp, 0.0.0.0:2183->2181/tcp zookeeper_node3 649a4dbfb694 3487af26dee9 "/docker-entrypoin..." 22 seconds ago Up 21 seconds 2888/tcp, 3888/tcp, 8080/tcp, 0.0.0.0:2182->2181/tcp zookeeper_node2 50c07cf11fab 3487af26dee9 "/docker-entrypoin..." 33 seconds ago Up 32 seconds 2888/tcp, 3888/tcp, 0.0.0.0:2181->2181/tcp, 8080/tcp zookeeper_node1 [root@localhost admin]#
进入容器内部验证一下：
[root@localhost admin]# docker exec -it 50c07cf11fab bash root@50c07cf11fab:/apache-zookeeper-3.5.5-bin# ./bin/zkServer.sh status ZooKeeper JMX enabled by default Using config: /conf/zoo.cfg Client port found: 2181. Client address: localhost. Mode: follower root@50c07cf11fab:/apache-zookeeper-3.5.5-bin# exit exit [root@localhost admin]# docker exec -it 649a4dbfb694 bash root@649a4dbfb694:/apache-zookeeper-3.5.5-bin# ./bin/zkServer.sh status ZooKeeper JMX enabled by default Using config: /conf/zoo.cfg Client port found: 2181. Client address: localhost. Mode: leader root@649a4dbfb694:/apache-zookeeper-3.5.5-bin# exit exit [root@localhost admin]# docker exec -it c8bc1b9ae9ad bash root@c8bc1b9ae9ad:/apache-zookeeper-3.5.5-bin# ./bin/zkServer.sh status ZooKeeper JMX enabled by default Using config: /conf/zoo.cfg Client port found: 2181. Client address: localhost. Mode: follower root@c8bc1b9ae9ad:/apache-zookeeper-3.5.5-bin# exit exit [root@localhost admin]#
在验证一下创建节点
开启防火墙，以供外部访问
firewall-cmd --zone=public --add-port=2181/tcp --permanent firewall-cmd --zone=public --add-port=2182/tcp --permanent firewall-cmd --zone=public --add-port=2183/tcp --permanent systemctl restart firewalld firewall-cmd --list-all
在本地，我用zookeeper的客户端连接虚拟机上的集群：
可以看到连接成功！
集群安装方式二：通过docker stack deploy或docker-compose安装
这里用docker-compose。先安装docker-compose
[root@localhost admin]# curl -L "https://github.com/docker/compose/releases/download/1.24.1/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose% Total % Received % Xferd Average Speed Time Time Time CurrentDload Upload Total Spent Left Speed 100 617 0 617 0 0 145 0 --:--:-- 0:00:04 --:--:-- 145 100 15.4M 100 15.4M 0 0 131k 0 0:02:00 0:02:00 --:--:-- 136k [root@localhost admin]# chmod +x /usr/local/bin/docker-compose
检查版本（验证是否安装成功）
[root@localhost admin]# docker-compose --version docker-compose version 1.24.1, build 4667896b
卸载的话
rm /usr/local/bin/docker-compose
开始配置，新建三个挂载目录
[root@localhost admin]# mkdir /usr/local/zookeeper-cluster/node4 [root@localhost admin]# mkdir /usr/local/zookeeper-cluster/node5 [root@localhost admin]# mkdir /usr/local/zookeeper-cluster/node6
新建任意目录，然后在里面新建一个文件
[root@localhost admin]# mkdir DockerComposeFolder [root@localhost admin]# cd DockerComposeFolder/ [root@localhost DockerComposeFolder]# vim docker-compose.yml
文件内容如下：（自定义网络见上面）
version: '3.1'services:zoo1:image: zookeeperrestart: alwaysprivileged: truehostname: zoo1ports:- 2181:2181volumes: # 挂载数据- /usr/local/zookeeper-cluster/node4/data:/data- /usr/local/zookeeper-cluster/node4/datalog:/datalogenvironment:ZOO_MY_ID: 4ZOO_SERVERS: server.4=0.0.0.0:2888:3888;2181 server.5=zoo2:2888:3888;2181 server.6=zoo3:2888:3888;2181networks:default:ipv4_address: 172.18.0.14zoo2:image: zookeeperrestart: alwaysprivileged: truehostname: zoo2ports:- 2182:2181volumes: # 挂载数据- /usr/local/zookeeper-cluster/node5/data:/data- /usr/local/zookeeper-cluster/node5/datalog:/datalogenvironment:ZOO_MY_ID: 5ZOO_SERVERS: server.4=zoo1:2888:3888;2181 server.5=0.0.0.0:2888:3888;2181 server.6=zoo3:2888:3888;2181networks:default:ipv4_address: 172.18.0.15zoo3:image: zookeeperrestart: alwaysprivileged: truehostname: zoo3ports:- 2183:2181volumes: # 挂载数据- /usr/local/zookeeper-cluster/node6/data:/data- /usr/local/zookeeper-cluster/node6/datalog:/datalogenvironment:ZOO_MY_ID: 6ZOO_SERVERS: server.4=zoo1:2888:3888;2181 server.5=zoo2:2888:3888;2181 server.6=0.0.0.0:2888:3888;2181networks:default:ipv4_address: 172.18.0.16networks: # 自定义网络default:external:name: zoonet
注意yaml文件里不能有tab，只能有空格。
关于version与Docker版本的关系如下：
然后执行（-d后台启动）
docker-compose -f docker-compose.yml up -d
查看已启动的容器
[root@localhost DockerComposeFolder]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES a2c14814037d zookeeper "/docker-entrypoin..." 6 minutes ago Up About a minute 2888/tcp, 3888/tcp, 8080/tcp, 0.0.0.0:2183->2181/tcp dockercomposefolder_zoo3_1 50310229b216 zookeeper "/docker-entrypoin..." 6 minutes ago Up About a minute 2888/tcp, 3888/tcp, 0.0.0.0:2181->2181/tcp, 8080/tcp dockercomposefolder_zoo1_1 475d8a9e2d08 zookeeper "/docker-entrypoin..." 6 minutes ago Up About a minute 2888/tcp, 3888/tcp, 8080/tcp, 0.0.0.0:2182->2181/tcp dockercomposefolder_zoo2_1
进入一个容器
[root@localhost DockerComposeFolder]# docker exec -it a2c14814037d bash root@zoo3:/apache-zookeeper-3.5.5-bin# ./bin/zkCli.sh Connecting to localhost:2181....WatchedEvent state:SyncConnected type:None path:null [zk: localhost:2181(CONNECTED) 0] [zk: localhost:2181(CONNECTED) 1] ls / [zookeeper] [zk: localhost:2181(CONNECTED) 2] create /hi Created /hi [zk: localhost:2181(CONNECTED) 3] ls / [hi, zookeeper]
进入另一个容器
[root@localhost DockerComposeFolder]# docker exec -it 50310229b216 bash root@zoo1:/apache-zookeeper-3.5.5-bin# ./bin/zkCli.sh Connecting to localhost:2181...WatchedEvent state:SyncConnected type:None path:null[zk: localhost:2181(CONNECTED) 0] ls / [hi, zookeeper]
本地客户端连接集群：
zkCli.cmd -server 192.168.192.128:2181,192.168.192.128:2182,192.168.192.128:2183
查看
停止所有活动容器
删除所有已停止的容器
更多docker-compose的命令：
[root@localhost DockerComposeFolder]# docker-compose --help Define and run multi-container applications with Docker.Usage:docker-compose [-f <arg>...] [options] [COMMAND] [ARGS...]docker-compose -h|--helpOptions:-f, --file FILE Specify an alternate compose file(default: docker-compose.yml)-p, --project-name NAME Specify an alternate project name(default: directory name)--verbose Show more output--log-level LEVEL Set log level (DEBUG, INFO, WARNING, ERROR, CRITICAL)--no-ansi Do not print ANSI control characters-v, --version Print version and exit-H, --host HOST Daemon socket to connect to--tls Use TLS; implied by --tlsverify--tlscacert CA_PATH Trust certs signed only by this CA--tlscert CLIENT_CERT_PATH Path to TLS certificate file--tlskey TLS_KEY_PATH Path to TLS key file--tlsverify Use TLS and verify the remote--skip-hostname-check Don't check the daemon's hostname against thename specified in the client certificate--project-directory PATH Specify an alternate working directory(default: the path of the Compose file)--compatibility If set, Compose will attempt to convert keysin v3 files to their non-Swarm equivalentCommands:build Build or rebuild servicesbundle Generate a Docker bundle from the Compose fileconfig Validate and view the Compose filecreate Create servicesdown Stop and remove containers, networks, images, and volumesevents Receive real time events from containersexec Execute a command in a running containerhelp Get help on a commandimages List imageskill Kill containerslogs View output from containerspause Pause servicesport Print the public port for a port bindingps List containerspull Pull service imagespush Push service imagesrestart Restart servicesrm Remove stopped containersrun Run a one-off commandscale Set number of containers for a servicestart Start servicesstop Stop servicestop Display the running processesunpause Unpause servicesup Create and start containersversion Show the Docker-Compose version information
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