1.從官網下載程序包。

2.解壓。

[dev@localhost software]$ tar xzvf zookeeper-3.4.6.tar.gz

3.進入zookeeper文件夾後創建data文件夾。

[dev@localhost software]$ cd zookeeper-3.4.6
[dev@localhost software]$ mkdir data

[dev@localhost software]$ cd data
[dev@localhost software]$ touch myid

??????? myid這個文件必須創建。不然啟動的時候會跑出以下的異常。

[dev@localhost bin]$ ./zkServer.sh start-foreground
JMX enabled by default
Using config: /home/dev/zookeeper/zookeeper1/bin/../conf/zoo.cfg
2015-03-12 16:06:38,155 [myid:] - INFO  [main:QuorumPeerConfig@101] - Reading configuration from: /home/dev/zookeeper/zookeeper1/bin/../conf/zoo.cfg
2015-03-12 16:06:38,159 [myid:] - INFO  [main:QuorumPeerConfig@334] - Defaulting to majority quorums
2015-03-12 16:06:38,161 [myid:] - ERROR [main:QuorumPeerMain@85] - Invalid config, exiting abnormally
org.apache.zookeeper.server.quorum.QuorumPeerConfig$ConfigException: Error processing /home/dev/zookeeper/zookeeper1/bin/../conf/zoo.cfg
     at org.apache.zookeeper.server.quorum.QuorumPeerConfig.parse(QuorumPeerConfig.java:121)
     at org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:101)
     at org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:78)
Caused by: java.lang.IllegalArgumentException: /home/dev/zookeeper/zookeeper1/data/myid file is missing
     at org.apache.zookeeper.server.quorum.QuorumPeerConfig.parseProperties(QuorumPeerConfig.java:344)
     at org.apache.zookeeper.server.quorum.QuorumPeerConfig.parse(QuorumPeerConfig.java:117)
     ... 2 more
Invalid config, exiting abnormally

??????? myid文件中必需要有內容，其值相應zoo.cfg中server的id。有點繞，我也是試了好多次才配好的。也就說，假如集群的配置例如以下，那問題來了，怎麽區分當前啟動的zookeeper是哪一個呢？就是通過myid文件來區分的。第1個zookeeper服務的myid文件的內容就是1。其他就以此類推了。假設myid配錯了，後果非常嚴重——zookeeper服務起不來。O(∩_∩)O哈哈~，而且報以下的異常。

server.1=localhost:2888:3888
server.2=localhost:2889:3889
server.3=localhost:2890:3890

[dev@localhost bin]$  ./zkServer.sh start-foreground
JMX enabled by default
Using config: /home/dev/zookeeper/zookeeper2/bin/../conf/zoo.cfg
2015-03-12 16:09:35,422 [myid:] - INFO  [main:QuorumPeerConfig@101] - Reading configuration from: /home/dev/zookeeper/zookeeper2/bin/../conf/zoo.cfg
2015-03-12 16:09:35,426 [myid:] - INFO  [main:QuorumPeerConfig@334] - Defaulting to majority quorums
2015-03-12 16:09:35,434 [myid:0] - INFO  [main:DatadirCleanupManager@78] - autopurge.snapRetainCount set to 3
2015-03-12 16:09:35,434 [myid:0] - INFO  [main:DatadirCleanupManager@79] - autopurge.purgeInterval set to 0
2015-03-12 16:09:35,435 [myid:0] - INFO  [main:DatadirCleanupManager@101] - Purge task is not scheduled.
2015-03-12 16:09:35,455 [myid:0] - INFO  [main:QuorumPeerMain@127] - Starting quorum peer
2015-03-12 16:09:35,472 [myid:0] - INFO  [main:NIOServerCnxnFactory@94] - binding to port 0.0.0.0/0.0.0.0:2182
2015-03-12 16:09:35,500 [myid:0] - INFO  [main:QuorumPeer@913] - tickTime set to 2000
2015-03-12 16:09:35,501 [myid:0] - INFO  [main:QuorumPeer@933] - minSessionTimeout set to -1
2015-03-12 16:09:35,501 [myid:0] - INFO  [main:QuorumPeer@944] - maxSessionTimeout set to -1
2015-03-12 16:09:35,502 [myid:0] - INFO  [main:QuorumPeer@959] - initLimit set to 10
2015-03-12 16:09:35,519 [myid:0] - ERROR [main:QuorumPeer@171] - Setting LearnerType to PARTICIPANT but 0 not in QuorumPeers.
2015-03-12 16:09:35,530 [myid:0] - INFO  [main:QuorumPeer@429] - currentEpoch not found! Creating with a reasonable default of 0. This should only happen when you are upgrading your installation
2015-03-12 16:09:35,591 [myid:0] - INFO  [main:QuorumPeer@444] - acceptedEpoch not found! Creating with a reasonable default of 0. This should only happen when you are upgrading your installation
2015-03-12 16:09:35,598 [myid:0] - ERROR [main:QuorumPeerMain@89] - Unexpected exception, exiting abnormally
java.lang.RuntimeException: My id 0 not in the peer list
     at org.apache.zookeeper.server.quorum.QuorumPeer.startLeaderElection(QuorumPeer.java:479)
     at org.apache.zookeeper.server.quorum.QuorumPeer.start(QuorumPeer.java:411)
     at org.apache.zookeeper.server.quorum.QuorumPeerMain.runFromConfig(QuorumPeerMain.java:151)
     at org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:111)
     at org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:78)

server.1=localhost:2888:3888
server.2=localhost:2889:3889
server.3=localhost:2890:3890