本文介绍zookeeper单节点安装。
下载
http://archive.apache.org/dist/zookeeper/zookeeper-3.4.6/
解压后，把conf中的zoo_sample.cfg复制一份成为zoo.cfg，修改一下里面的路径：
启动zookeeper
[work@xxx zookeeper-3.4.6]$ bin/zkServer.sh start
JMX enabled by default
Using config: /home/work/soft/zookeeper-3.4.6/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
如果配置文件不是zoo.cfg，可以在start后面加上你指定的配置文件的名字
查看状态
[work@xxx zookeeper-3.4.6]$ bin/zkServer.sh status
JMX enabled by default
Using config: /home/work/soft/zookeeper-3.4.6/bin/../conf/zoo.cfg
Error contacting service. It is probably not running.
明明提示起来了，但是状态就不对，看了一下进程都没有起来。这时候看了网上各种文章，里面列出了一些解决方法：
1、zoo.cfg配置文件中指定目录却没有创建，创建相应目录即可
2、使用service iptables stop 关闭防火墙；使用service iptables status确认
3、打开zkServer.sh 找到
status)
STAT=`echo stat | nc localhost $(grep clientPort "$ZOOCFG" | sed -e 's/.*=//') 2> /dev/null| grep Mode`
在nc与localhost之间加上 -q 1 （是数字1而不是字母l），如果已存在则去掉
4、2181端口被占用
但是我遇到的情况都不是上面提到的，后面查到有个zookeeper.out的文件，里面会有一些log信息。
查看zookeeper.out
[work@xxx zookeeper-3.4.6]$cat zookeeper.out
nohup: failed to run command `/usr/java/jdk1.8.0_65//bin/java': No such file or directory
这里可以看到是系统的环境变量有问题了！！！
查看系统环境变量
[work@xxx zookeeper-3.4.6]$ export
declare -x CVS_RSH="ssh"
declare -x G_BROKEN_FILENAMES="1"
declare -x HISTCONTROL="ignoredups"
declare -x HISTSIZE="1000"
declare -x HISTTIMEFORMAT="%F %T work "
declare -x HOME="/home/work"
declare -x JAVA_HOME="/usr/java/jdk1.8.0_65/"
果然TM有问题！
修改系统环境变量
[work@xxx zookeeper-3.4.6]$ export JAVA_HOME=/usr
再次启动zookeeper
[work@xxx zookeeper-3.4.6]$ bin/zkServer.sh start
JMX enabled by default
Using config: /home/work/soft/zookeeper-3.4.6/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
再次查看状态
[work@xxx zookeeper-3.4.6]$ bin/zkServer.sh status
JMX enabled by default
Using config: /home/work/soft/zookeeper-3.4.6/bin/../conf/zoo.cfg
Mode: standalone
再次查看zookeeper.out
[work@xxx zookeeper-3.4.6]$ cat zookeeper.out
2018-01-05 20:29:36,745 [myid:] - INFO [main:QuorumPeerConfig@103] - Reading configuration from: /home/work/soft/zookeeper-3.4.6/bin/../conf/zoo.cfg
2018-01-05 20:29:36,751 [myid:] - INFO [main:DatadirCleanupManager@78] - autopurge.snapRetainCount set to 3
2018-01-05 20:29:36,752 [myid:] - INFO [main:DatadirCleanupManager@79] - autopurge.purgeInterval set to 0
2018-01-05 20:29:36,752 [myid:] - INFO [main:DatadirCleanupManager@101] - Purge task is not scheduled.
2018-01-05 20:29:36,752 [myid:] - WARN [main:QuorumPeerMain@113] - Either no config or no quorum defined in config, running in standalone mode
2018-01-05 20:29:36,767 [myid:] - INFO [main:QuorumPeerConfig@103] - Reading configuration from: /home/work/soft/zookeeper-3.4.6/bin/../conf/zoo.cfg
2018-01-05 20:29:36,767 [myid:] - INFO [main:ZooKeeperServerMain@95] - Starting server
2018-01-05 20:29:36,776 [myid:] - INFO [main:Environment@100] - Server environment:zookeeper.version=3.4.6-1569965, built on 02/20/2014 09:09 GMT
2018-01-05 20:29:36,776 [myid:] - INFO [main:Environment@100] - Server environment:host.name=xxx
2018-01-05 20:29:36,776 [myid:] - INFO [main:Environment@100] - Server environment:java.version=1.7.0_111
2018-01-05 20:29:36,776 [myid:] - INFO [main:Environment@100] - Server environment:java.vendor=Oracle Corporation
2018-01-05 20:29:36,776 [myid:] - INFO [main:Environment@100] - Server environment:java.home=/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.111.x86_64/jre
2018-01-05 20:29:36,776 [myid:] - INFO [main:Environment@100] - Server environment:java.class.path=/home/work/soft/zookeeper-3.4.6/bin/../build/classes:/home/work/soft/zookeeper-3.4.6/bin/../build/lib/*.jar:/home/work/soft/zookeeper-3.4.6/bin/../lib/slf4j-log4j12-1.6.1.jar:/home/work/soft/zookeeper-3.4.6/bin/../lib/slf4j-api-1.6.1.jar:/home/work/soft/zookeeper-3.4.6/bin/../lib/netty-3.7.0.Final.jar:/home/work/soft/zookeeper-3.4.6/bin/../lib/log4j-1.2.16.jar:/home/work/soft/zookeeper-3.4.6/bin/../lib/jline-0.9.94.jar:/home/work/soft/zookeeper-3.4.6/bin/../zookeeper-3.4.6.jar:/home/work/soft/zookeeper-3.4.6/bin/../src/java/lib/*.jar:/home/work/soft/zookeeper-3.4.6/bin/../conf:
2018-01-05 20:29:36,777 [myid:] - INFO [main:Environment@100] - Server environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
2018-01-05 20:29:36,777 [myid:] - INFO [main:Environment@100] - Server environment:java.io.tmpdir=/tmp
2018-01-05 20:29:36,777 [myid:] - INFO [main:Environment@100] - Server environment:java.compiler=<NA>
2018-01-05 20:29:36,779 [myid:] - INFO [main:Environment@100] - Server environment:os.name=Linux
2018-01-05 20:29:36,779 [myid:] - INFO [main:Environment@100] - Server environment:os.arch=amd64
2018-01-05 20:29:36,779 [myid:] - INFO [main:Environment@100] - Server environment:os.version=3.10.0_1-0-0-8
2018-01-05 20:29:36,780 [myid:] - INFO [main:Environment@100] - Server environment:user.name=work
2018-01-05 20:29:36,780 [myid:] - INFO [main:Environment@100] - Server environment:user.home=/home/work
2018-01-05 20:29:36,780 [myid:] - INFO [main:Environment@100] - Server environment:user.dir=/home/work/soft/zookeeper-3.4.6
2018-01-05 20:29:36,787 [myid:] - INFO [main:ZooKeeperServer@755] - tickTime set to 2000
2018-01-05 20:29:36,787 [myid:] - INFO [main:ZooKeeperServer@764] - minSessionTimeout set to -1
2018-01-05 20:29:36,787 [myid:] - INFO [main:ZooKeeperServer@773] - maxSessionTimeout set to -1
2018-01-05 20:29:36,803 [myid:] - INFO [main:NIOServerCnxnFactory@94] - binding to port 0.0.0.0/0.0.0.0:2181
2018-01-05 20:29:41,380 [myid:] - INFO [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxnFactory@197] - Accepted socket connection from /127.0.0.1:33745
2018-01-05 20:29:41,385 [myid:] - INFO [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@827] - Processing srvr command from /127.0.0.1:33745
2018-01-05 20:29:41,388 [myid:] - INFO [Thread-1:NIOServerCnxn@1007] - Closed socket connection for client /127.0.0.1:33745 (no session established for client)
启动成功后可以看到zoo_0中
里面的文件zookeeper_server.pid就是对应的进程号
安装后用cli来测试一下：
[work@xxx zookeeper-3.4.6]$ bin/zkCli.sh -server 127.0.0.1:2181
Connecting to 127.0.0.1:2181
2018-01-05 21:25:15,952 [myid:] - INFO [main:Environment@100] - Client environment:zookeeper.version=3.4.6-1569965, built on 02/20/2014 09:09 GMT
2018-01-05 21:25:15,956 [myid:] - INFO [main:Environment@100] - Client environment:host.name=xxx
2018-01-05 21:25:15,956 [myid:] - INFO [main:Environment@100] - Client environment:java.version=1.7.0_111
2018-01-05 21:25:15,958 [myid:] - INFO [main:Environment@100] - Client environment:java.vendor=Oracle Corporation
2018-01-05 21:25:15,958 [myid:] - INFO [main:Environment@100] - Client environment:java.home=/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.111.x86_64/jre
2018-01-05 21:25:15,958 [myid:] - INFO [main:Environment@100] - Client environment:java.class.path=/home/work/soft/zookeeper-3.4.6/bin/../build/classes:/home/work/soft/zookeeper-3.4.6/bin/../build/lib/*.jar:/home/work/soft/zookeeper-3.4.6/bin/../lib/slf4j-log4j12-1.6.1.jar:/home/work/soft/zookeeper-3.4.6/bin/../lib/slf4j-api-1.6.1.jar:/home/work/soft/zookeeper-3.4.6/bin/../lib/netty-3.7.0.Final.jar:/home/work/soft/zookeeper-3.4.6/bin/../lib/log4j-1.2.16.jar:/home/work/soft/zookeeper-3.4.6/bin/../lib/jline-0.9.94.jar:/home/work/soft/zookeeper-3.4.6/bin/../zookeeper-3.4.6.jar:/home/work/soft/zookeeper-3.4.6/bin/../src/java/lib/*.jar:/home/work/soft/zookeeper-3.4.6/bin/../conf:
2018-01-05 21:25:15,958 [myid:] - INFO [main:Environment@100] - Client environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
2018-01-05 21:25:15,959 [myid:] - INFO [main:Environment@100] - Client environment:java.io.tmpdir=/tmp
2018-01-05 21:25:15,959 [myid:] - INFO [main:Environment@100] - Client environment:java.compiler=<NA>
2018-01-05 21:25:15,959 [myid:] - INFO [main:Environment@100] - Client environment:os.name=Linux
2018-01-05 21:25:15,959 [myid:] - INFO [main:Environment@100] - Client environment:os.arch=amd64
2018-01-05 21:25:15,959 [myid:] - INFO [main:Environment@100] - Client environment:os.version=3.10.0_1-0-0-8
2018-01-05 21:25:15,959 [myid:] - INFO [main:Environment@100] - Client environment:user.name=work
2018-01-05 21:25:15,959 [myid:] - INFO [main:Environment@100] - Client environment:user.home=/home/work
2018-01-05 21:25:15,959 [myid:] - INFO [main:Environment@100] - Client environment:user.dir=/home/work/soft/zookeeper-3.4.6
2018-01-05 21:25:15,961 [myid:] - INFO [main:ZooKeeper@438] - Initiating client connection, connectString=127.0.0.1:2181 sessionTimeout=30000 watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@544cbce2
Welcome to ZooKeeper!
2018-01-05 21:25:15,988 [myid:] - INFO [main-SendThread(127.0.0.1:2181):ClientCnxn$SendThread@975] - Opening socket connection to server 127.0.0.1/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)
JLine support is enabled
2018-01-05 21:25:15,994 [myid:] - INFO [main-SendThread(127.0.0.1:2181):ClientCnxn$SendThread@852] - Socket connection established to 127.0.0.1/127.0.0.1:2181, initiating session
2018-01-05 21:25:16,018 [myid:] - INFO [main-SendThread(127.0.0.1:2181):ClientCnxn$SendThread@1235] - Session establishment complete on server 127.0.0.1/127.0.0.1:2181, sessionid = 0x160c67e9c270000, negotiated timeout = 30000
[zk: 127.0.0.1:2181(CONNECTED) 0]
WATCHER::
WatchedEvent state:SyncConnected type:None path:null
[zk: 127.0.0.1:2181(CONNECTED) 0]
[zk: 127.0.0.1:2181(CONNECTED) 0] help
ZooKeeper -server host:port cmd args
connect host:port
get path [watch]
ls path [watch]
set path data [version]
rmr path
delquota [-n|-b] path
quit
printwatches on|off
create [-s] [-e] path data acl
stat path [watch]
close
ls2 path [watch]
history
listquota path
setAcl path acl
getAcl path
sync path
redo cmdno
addauth scheme auth
delete path [version]
setquota -n|-b val path
[zk: 127.0.0.1:2181(CONNECTED) 1]
[zk: 127.0.0.1:2181(CONNECTED) 1]
[zk: 127.0.0.1:2181(CONNECTED) 1]
windows下的安装方式见：zookeeper单节点windows下安装
本文参考自：
http://blog.csdn.net/xiewendong93/article/details/50500471
http://qsfwy.iteye.com/blog/1667191
https://www.cnblogs.com/haippy/archive/2012/07/19/2599989.html