单机模式

我们使用 Docker 来搭建单机模式的 Zookeeper，docker-compose.yml 配置文件如下：

version: '3.1'

services:
    zoo1:
        image: zookeeper
        restart: always
        hostname: zoo1
        ports:
            - 2181:2181
        environment:
            ZOO_MY_ID: 1
            ZOO_SERVERS: server.1=zoo1:2888:3888

验证测试：

• 以交互的方式进入容器

docker exec -it zookeeper_zoo1_1 /bin/bash

• 使用客户端连接到服务端

bash-4.3# ./bin/zkCli.sh -server 192.168.75.130:2181
Connecting to 192.168.75.130:2181
2017-11-09 07:45:58,365 [myid:] - INFO  [main:Environment@100] - Client environment:zookeeper.version=3.4.10-39d3a4f269333c922ed3db283be479f9deacaa0f, built on 03/23/2017 10:13 GMT
2017-11-09 07:45:58,374 [myid:] - INFO  [main:Environment@100] - Client environment:host.name=zoo1
2017-11-09 07:45:58,374 [myid:] - INFO  [main:Environment@100] - Client environment:java.version=1.8.0_131
2017-11-09 07:45:58,380 [myid:] - INFO  [main:Environment@100] - Client environment:java.vendor=Oracle Corporation
2017-11-09 07:45:58,381 [myid:] - INFO  [main:Environment@100] - Client environment:java.home=/usr/lib/jvm/java-1.8-openjdk/jre
2017-11-09 07:45:58,381 [myid:] - INFO  [main:Environment@100] - Client environment:java.class.path=/zookeeper-3.4.10/bin/../build/classes:/zookeeper-3.4.10/bin/../build/lib/*.jar:/zookeeper-3.4.10/bin/../lib/slf4j-log4j12-1.6.1.jar:/zookeeper-3.4.10/bin/../lib/slf4j-api-1.6.1.jar:/zookeeper-3.4.10/bin/../lib/netty-3.10.5.Final.jar:/zookeeper-3.4.10/bin/../lib/log4j-1.2.16.jar:/zookeeper-3.4.10/bin/../lib/jline-0.9.94.jar:/zookeeper-3.4.10/bin/../zookeeper-3.4.10.jar:/zookeeper-3.4.10/bin/../src/java/lib/*.jar:/conf:
2017-11-09 07:45:58,381 [myid:] - INFO  [main:Environment@100] - Client environment:java.library.path=/usr/lib/jvm/java-1.8-openjdk/jre/lib/amd64/server:/usr/lib/jvm/java-1.8-openjdk/jre/lib/amd64:/usr/lib/jvm/java-1.8-openjdk/jre/../lib/amd64:/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
2017-11-09 07:45:58,381 [myid:] - INFO  [main:Environment@100] - Client environment:java.io.tmpdir=/tmp
2017-11-09 07:45:58,381 [myid:] - INFO  [main:Environment@100] - Client environment:java.compiler=<NA>
2017-11-09 07:45:58,381 [myid:] - INFO  [main:Environment@100] - Client environment:os.name=Linux
2017-11-09 07:45:58,382 [myid:] - INFO  [main:Environment@100] - Client environment:os.arch=amd64
2017-11-09 07:45:58,382 [myid:] - INFO  [main:Environment@100] - Client environment:os.version=4.4.0-98-generic
2017-11-09 07:45:58,386 [myid:] - INFO  [main:Environment@100] - Client environment:user.name=root
2017-11-09 07:45:58,386 [myid:] - INFO  [main:Environment@100] - Client environment:user.home=/root
2017-11-09 07:45:58,386 [myid:] - INFO  [main:Environment@100] - Client environment:user.dir=/zookeeper-3.4.10
2017-11-09 07:45:58,389 [myid:] - INFO  [main:ZooKeeper@438] - Initiating client connection, connectString=192.168.75.130:2181 sessionTimeout=30000 watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@3eb07fd3
2017-11-09 07:45:58,428 [myid:] - INFO  [main-SendThread(192.168.75.130:2181):ClientCnxn$SendThread@1032] - Opening socket connection to server 192.168.75.130/192.168.75.130:2181. Will not attempt to authenticate using SASL (unknown error)
Welcome to ZooKeeper!
JLine support is enabled
2017-11-09 07:45:58,529 [myid:] - INFO  [main-SendThread(192.168.75.130:2181):ClientCnxn$SendThread@876] - Socket connection established to 192.168.75.130/192.168.75.130:2181, initiating session
[zk: 192.168.75.130:2181(CONNECTING) 0] 2017-11-09 07:45:58,573 [myid:] - INFO  [main-SendThread(192.168.75.130:2181):ClientCnxn$SendThread@1299] - Session establishment complete on server 192.168.75.130/192.168.75.130:2181, sessionid = 0x15f9fbc12ec0000, negotiated timeout = 30000

WATCHER::

WatchedEvent state:SyncConnected type:None path:null

• 使用服务端工具检查服务器状态

bash-4.3# ./bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /conf/zoo.cfg
Mode: standalone

• Mode: standalone - 单机模式