Docker下安装zookeeper(单机 & 集群)

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:

[root@localhost admin]# docker pull zookeeper
Using default tag: latest
Trying to pull repository docker.io/library/zookeeper ... 
latest: Pulling from docker.io/library/zookeeper
1ab2bdfe9778: Already exists 
7aaf9a088d61: Pull complete 
80a55c9c9fe8: Pull complete 
a0086b0e6eec: Pull complete 
4165e7457cad: Pull complete 
bcba13bcf3a1: Pull complete 
41c03a109e47: Pull complete 
4d5281c6b0d4: Pull complete 
Digest: sha256:175d6bb1471e1e37a48bfa41a9da047c80fade60fd585eae3a0e08a4ce1d39ed
Status: Downloaded newer image for docker.io/zookeeper:latest

  

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

# 最后那个是镜像的ID
[root@localhost admin]# docker run -d -p 2181:2181 --name some-zookeeper --restart always 3487af26dee9 d5c6f857cd88c342acf63dd58e838a4cdf912daa6c8c0115091147136e819307 [root@localhost admin]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES d5c6f857cd88 3487af26dee9 "/docker-entrypoin..." 4 seconds ago Up 3 seconds 2888/tcp, 3888/tcp, 0.0.0.0:2181->2181/tcp, 8080/tcp some-zookeeper [root@localhost admin]# docker exec -it d5c6f857cd88 bash root@d5c6f857cd88:/apache-zookeeper-3.5.5-bin# ./bin/zkCli.sh Connecting to localhost:2181 2019-08-29 07:15:21,623 [myid:] - INFO [main:Environment@109] - Client environment:zookeeper.version=3.5.5-390fe37ea45dee01bf87dc1c042b5e3dcce88653, built on 05/03/2019 12:07 GMT 2019-08-29 07:15:21,679 [myid:] - INFO [main:Environment@109] - Client environment:host.name=d5c6f857cd88 2019-08-29 07:15:21,680 [myid:] - INFO [main:Environment@109] - Client environment:java.version=1.8.0_222 2019-08-29 07:15:21,717 [myid:] - INFO [main:Environment@109] - Client environment:java.vendor=Oracle Corporation 2019-08-29 07:15:21,718 [myid:] - INFO [main:Environment@109] - Client environment:java.home=/usr/local/openjdk-8 2019-08-29 07:15:21,725 [myid:] - INFO [main:Environment@109] - Client environment:java.class.path=/apache-zookeeper-3.5.5-bin/bin/../zookeeper-server/target/classes:/apache-zookeeper-3.5.5-bin/bin/../build/classes:/apache-zookeeper-3.5.5-bin/bin/../zookeeper-server/target/lib/*.jar:/apache-zookeeper-3.5.5-bin/bin/../build/lib/*.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/zookeeper-jute-3.5.5.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/zookeeper-3.5.5.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/slf4j-log4j12-1.7.25.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/slf4j-api-1.7.25.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/netty-all-4.1.29.Final.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/log4j-1.2.17.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/json-simple-1.1.1.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/jline-2.11.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/jetty-util-9.4.17.v20190418.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/jetty-servlet-9.4.17.v20190418.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/jetty-server-9.4.17.v20190418.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/jetty-security-9.4.17.v20190418.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/jetty-io-9.4.17.v20190418.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/jetty-http-9.4.17.v20190418.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/javax.servlet-api-3.1.0.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/jackson-databind-2.9.8.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/jackson-core-2.9.8.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/jackson-annotations-2.9.0.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/commons-cli-1.2.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/audience-annotations-0.5.0.jar:/apache-zookeeper-3.5.5-bin/bin/../zookeeper-*.jar:/apache-zookeeper-3.5.5-bin/bin/../zookeeper-server/src/main/resources/lib/*.jar:/conf: 2019-08-29 07:15:22,108 [myid:] - INFO [main:Environment@109] - Client environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib 2019-08-29 07:15:22,109 [myid:] - INFO [main:Environment@109] - Client environment:java.io.tmpdir=/tmp 2019-08-29 07:15:22,109 [myid:] - INFO [main:Environment@109] - Client environment:java.compiler=<NA> 2019-08-29 07:15:22,109 [myid:] - INFO [main:Environment@109] - Client environment:os.name=Linux 2019-08-29 07:15:22,109 [myid:] - INFO [main:Environment@109] - Client environment:os.arch=amd64 2019-08-29 07:15:22,110 [myid:] - INFO [main:Environment@109] - Client environment:os.version=3.10.0-862.9.1.el7.x86_64 2019-08-29 07:15:22,110 [myid:] - INFO [main:Environment@109] - Client environment:user.name=root 2019-08-29 07:15:22,110 [myid:] - INFO [main:Environment@109] - Client environment:user.home=/root 2019-08-29 07:15:22,110 [myid:] - INFO [main:Environment@109] - Client environment:user.dir=/apache-zookeeper-3.5.5-bin 2019-08-29 07:15:22,118 [myid:] - INFO [main:Environment@109] - Client environment:os.memory.free=11MB 2019-08-29 07:15:22,148 [myid:] - INFO [main:Environment@109] - Client environment:os.memory.max=247MB 2019-08-29 07:15:22,148 [myid:] - INFO [main:Environment@109] - Client environment:os.memory.total=15MB 2019-08-29 07:15:22,206 [myid:] - INFO [main:ZooKeeper@868] - Initiating client connection, connectString=localhost:2181 sessionTimeout=30000 watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@3b95a09c 2019-08-29 07:15:22,239 [myid:] - INFO [main:X509Util@79] - Setting -D jdk.tls.rejectClientInitiatedRenegotiation=true to disable client-initiated TLS renegotiation 2019-08-29 07:15:22,285 [myid:] - INFO [main:ClientCnxnSocket@237] - jute.maxbuffer value is 4194304 Bytes 2019-08-29 07:15:22,366 [myid:] - INFO [main:ClientCnxn@1653] - zookeeper.request.timeout value is 0. feature enabled= Welcome to ZooKeeper! JLine support is enabled 2019-08-29 07:15:22,563 [myid:localhost:2181] - INFO [main-SendThread(localhost:2181):ClientCnxn$SendThread@1112] - Opening socket connection to server localhost/0:0:0:0:0:0:0:1:2181. Will not attempt to authenticate using SASL (unknown error) 2019-08-29 07:15:23,443 [myid:localhost:2181] - INFO [main-SendThread(localhost:2181):ClientCnxn$SendThread@959] - Socket connection established, initiating session, client: /0:0:0:0:0:0:0:1:37198, server: localhost/0:0:0:0:0:0:0:1:2181 2019-08-29 07:15:23,520 [myid:localhost:2181] - INFO [main-SendThread(localhost:2181):ClientCnxn$SendThread@1394] - Session establishment complete on server localhost/0:0:0:0:0:0:0:1:2181, sessionid = 0x10001216d990000, negotiated timeout = 30000 WATCHER:: WatchedEvent state:SyncConnected type:None path:null [zk: localhost:2181(CONNECTED) 0] ls / [zookeeper] [zk: localhost:2181(CONNECTED) 1] quit WATCHER:: WatchedEvent state:Closed type:None path:null 2019-08-29 07:15:37,042 [myid:] - INFO [main:ZooKeeper@1422] - Session: 0x10001216d990000 closed 2019-08-29 07:15:37,043 [myid:] - INFO [main-EventThread:ClientCnxn$EventThread@524] - EventThread shut down for session: 0x10001216d990000 root@d5c6f857cd88:/apache-zookeeper-3.5.5-bin# exit exit [root@localhost admin]#

  

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" 3487af26dee9

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

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

【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" 3487af26dee9

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

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 

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  Current
                                 Dload  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: zookeeper
    restart: always
    privileged: true
    hostname: zoo1
    ports:
      - 2181:2181
    volumes: # 挂载数据
      - /usr/local/zookeeper-cluster/node4/data:/data
      - /usr/local/zookeeper-cluster/node4/datalog:/datalog
    environment:
      ZOO_MY_ID: 4
      ZOO_SERVERS: server.4=0.0.0.0:2888:3888;2181 server.5=zoo2:2888:3888;2181 server.6=zoo3:2888:3888;2181
    networks:
      default:
        ipv4_address: 172.18.0.14

  zoo2:
    image: zookeeper
    restart: always
    privileged: true
    hostname: zoo2
    ports:
      - 2182:2181
    volumes: # 挂载数据
      - /usr/local/zookeeper-cluster/node5/data:/data
      - /usr/local/zookeeper-cluster/node5/datalog:/datalog
    environment:
      ZOO_MY_ID: 5
      ZOO_SERVERS: server.4=zoo1:2888:3888;2181 server.5=0.0.0.0:2888:3888;2181 server.6=zoo3:2888:3888;2181
    networks:
      default:
        ipv4_address: 172.18.0.15

  zoo3:
    image: zookeeper
    restart: always
    privileged: true
    hostname: zoo3
    ports:
      - 2183:2181
    volumes: # 挂载数据
      - /usr/local/zookeeper-cluster/node6/data:/data
      - /usr/local/zookeeper-cluster/node6/datalog:/datalog
    environment:
      ZOO_MY_ID: 6
      ZOO_SERVERS: server.4=zoo1:2888:3888;2181 server.5=zoo2:2888:3888;2181 server.6=0.0.0.0:2888:3888;2181
    networks:
      default:
        ipv4_address: 172.18.0.16

networks: # 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|--help

Options:
  -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 the
                              name 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 keys
                              in v3 files to their non-Swarm equivalent

Commands:
  build              Build or rebuild services
  bundle             Generate a Docker bundle from the Compose file
  config             Validate and view the Compose file
  create             Create services
  down               Stop and remove containers, networks, images, and volumes
  events             Receive real time events from containers
  exec               Execute a command in a running container
  help               Get help on a command
  images             List images
  kill               Kill containers
  logs               View output from containers
  pause              Pause services
  port               Print the public port for a port binding
  ps                 List containers
  pull               Pull service images
  push               Push service images
  restart            Restart services
  rm                 Remove stopped containers
  run                Run a one-off command
  scale              Set number of containers for a service
  start              Start services
  stop               Stop services
  top                Display the running processes
  unpause            Unpause services
  up                 Create and start containers
  version            Show the Docker-Compose version information

 

posted @ 2019-08-30 11:41  小LUA  阅读(16664)  评论(3编辑  收藏