docker搭建zookeeper集群

本实例基于docker-compose搭建zookeeper集群，搭建过程中遇到了版本问题，一直启动不了，错误编码如下：

报错版本，镜像3.4

2022-04-25 08:10:56,614 [myid:] - INFO  [main:QuorumPeerConfig@136] - Reading configuration from: /conf/zoo.cfg
2022-04-25 08:10:56,617 [myid:] - ERROR [main:QuorumPeerMain@88] - Invalid config, exiting abnormally
 org.apache.zookeeper.server.quorum.QuorumPeerConfig$ConfigException: Error processing /conf/zoo.cfg
      at org.apache.zookeeper.server.quorum.QuorumPeerConfig.parse(QuorumPeerConfig.java:156)
       at org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:104)
       at org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:81)
 Caused by: java.lang.NumberFormatException: For input string: "3888;2181"
       at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
       at java.lang.Integer.parseInt(Integer.java:580)
      at java.lang.Integer.parseInt(Integer.java:615)
       at org.apache.zookeeper.server.quorum.QuorumPeerConfig.parseProperties(QuorumPeerConfig.java:226)
       at org.apache.zookeeper.server.quorum.QuorumPeerConfig.parse(QuorumPeerConfig.java:152)
       ... 2 more
 Invalid config, exiting abnormally
 ZooKeeper JMX enabled by default
 Using config: /conf/zoo.cfg

解决办法：使用zookeeper 3.5版本以上

version: '3.1'
services:
  zoo1:
    image: zookeeper:3.6.3
    restart: always
    hostname: zoo1
    ports:
      - 2181:2181
    environment:
      ZOO_MY_ID: 1
      ZOO_SERVERS: server.1=0.0.0.0:2888:3888;2181 server.2=zoo2:2888:3888;2181 server.3=zoo3:2888:3888;2181
  zoo2:
    image: zookeeper:3.6.3
    restart: always
    hostname: zoo2
    ports:
      - 2182:2181
    environment:
      ZOO_MY_ID: 2
      ZOO_SERVERS: server.1=zoo1:2888:3888;2181 server.2=0.0.0.0:2888:3888;2181 server.3=zoo3:2888:3888;2181
  zoo3:
    image: zookeeper:3.6.3
    restart: always
    hostname: zoo3
    ports:
      - 2183:2181
    environment:
      ZOO_MY_ID: 3
      ZOO_SERVERS: server.1=zoo1:2888:3888;2181 server.2=zoo2:2888:3888;2181 server.3=0.0.0.0:2888:3888;2181

启动结果（docker-compose up -d）

  Name                 Command               State                          Ports                        
----------------------------------------------------------------------------------------------------
zk_zoo1_1   /docker-entrypoint.sh zkSe ...   Up      0.0.0.0:2181->2181/tcp, 2888/tcp, 3888/tcp, 8080/tcp
zk_zoo2_1   /docker-entrypoint.sh zkSe ...   Up      0.0.0.0:2182->2181/tcp, 2888/tcp, 3888/tcp, 8080/tcp
zk_zoo3_1   /docker-entrypoint.sh zkSe ...   Up      0.0.0.0:2183->2181/tcp, 2888/tcp, 3888/tcp, 8080/tcp