brew安装
$ brew install zookeeper
因为之前装过，这里再重新装一下：
$ brew reinstall zookeeper
==> Downloading https://homebrew.bintray.com/bottles/zookeeper-3.4.12.el_capitan.bottle.tar.gz
######################################################################## 100.0%
==> Pouring zookeeper-3.4.12.el_capitan.bottle.tar.gz
==> Caveats
To have launchd start zookeeper now and restart at login:
brew services start zookeeper
Or, if you don't want/need a background service you can just run:
zkServer start
==> Summary
🍺 /usr/local/Cellar/zookeeper/3.4.12: 242 files, 32.9MB
查看zookeeper的信息：
$ brew info zookeeper
zookeeper: stable 3.4.12 (bottled), HEAD
Centralized server for distributed coordination of services
https://zookeeper.apache.org/
/usr/local/Cellar/zookeeper/3.4.12 (242 files, 32.9MB) *
Poured from bottle on 2018-10-08 at 19:57:49
From: https://github.com/Homebrew/homebrew-core/blob/master/Formula/zookeeper.rb
==> Options
--HEAD
Install HEAD version
==> Caveats
To have launchd start zookeeper now and restart at login:
brew services start zookeeper
Or, if you don't want/need a background service you can just run:
zkServer start
==> Analytics
install: 3,550 (30d), 13,807 (90d), 46,006 (365d)
install_on_request: 1,202 (30d), 4,955 (90d), 15,363 (365d)
build_error: 0 (30d)
安装完成，配置文件在 /usr/local/etc/zookeeper/ ，
$ ls /usr/local/etc/zookeeper
defaults log4j.properties zoo.cfg zoo_sample.cfg
其中我们一般需要修改的是 zoo.cfg 文件。bash
$ less -N /usr/local/etc/zookeeper/zoo.cfg
1 # The number of milliseconds of each tick
2 tickTime=2000
3 # The number of ticks that the initial
4 # synchronization phase can take
5 initLimit=10
6 # The number of ticks that can pass between
7 # sending a request and getting an acknowledgement
8 syncLimit=5
9 # the directory where the snapshot is stored.
10 # do not use /tmp for storage, /tmp here is just
11 # example sakes.
12 dataDir=/usr/local/var/run/zookeeper/data
13 # the port at which the clients will connect
14 clientPort=2181
15 # the maximum number of client connections.
16 # increase this if you need to handle more clients
17 #maxClientCnxns=60
18 #
19 # Be sure to read the maintenance section of the
20 # administrator guide before turning on autopurge.
21 #
22 # http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance
23 #
24 # The number of snapshots to retain in dataDir
25 #autopurge.snapRetainCount=3
26 # Purge task interval in hours
27 # Set to "0" to disable auto purge feature
28 #autopurge.purgeInterval=1
启动：
# 查看帮助
$ zkServer
ZooKeeper JMX enabled by default
Using config: /usr/local/etc/zookeeper/zoo.cfg
Usage: ./zkServer.sh {start|start-foreground|stop|restart|status|upgrade|print-cmd}
# 启动
$ zkServer start
ZooKeeper JMX enabled by default
Using config: /usr/local/etc/zookeeper/zoo.cfg
Starting zookeeper ... already running as process 10236.
# 查看状态
$ zkServer status
ZooKeeper JMX enabled by default
Using config: /usr/local/etc/zookeeper/zoo.cfg
# standalone 即单机模式
Mode: standalone
如果需要后台启动：
$ brew services start zookeeper
查看有哪些数据节点，zkCli 工具：
$ zkCli
Connecting to localhost:2181
Welcome to ZooKeeper!
JLine support is enabled
WATCHER::
WatchedEvent state:SyncConnected type:None path:null
[zk: localhost:2181(CONNECTED) 1] help
ZooKeeper -server host:port cmd args
stat path [watch]
set path data [version]
ls path [watch]
delquota [-n|-b] path
ls2 path [watch]
setAcl path acl
setquota -n|-b val path
history
redo cmdno
printwatches on|off
delete path [version]
sync path
listquota path
rmr path
get path [watch]
create [-s] [-e] path data acl
addauth scheme auth
quit
getAcl path
close
connect host:port
[zk: localhost:2181(CONNECTED) 0] ls /
[zookeeper]
[zk: localhost:2181(CONNECTED) 1] ls /zookeeper
[quota]
[zk: localhost:2181(CONNECTED) 2] ls /zookeeper/quota
[]
[zk: localhost:2181(CONNECTED) 3] quit
Quitting...
源代码安装
官网直接download：https://zookeeper.apache.org/releases.html
选择一个镜像源下载，这里随便选一个：https://mirrors.koehn.com/apache/zookeeper/stable/
解压后，文件目录如下：
$ ll
total 3184
-rw-r--r--@ 1 xushaopeng staff 12K 3 27 2018 LICENSE.txt
-rw-r--r--@ 1 xushaopeng staff 3.1K 3 27 2018 NOTICE.txt
-rw-r--r--@ 1 xushaopeng staff 1.5K 3 27 2018 README.md
-rw-r--r--@ 1 xushaopeng staff 1.7K 3 27 2018 README_packaging.txt
drwxr-xr-x@ 10 xushaopeng staff 340B 3 27 2018 bin
-rw-r--r--@ 1 xushaopeng staff 86K 3 27 2018 build.xml
drwxr-xr-x@ 5 xushaopeng staff 170B 3 27 2018 conf
drwxr-xr-x@ 10 xushaopeng staff 340B 3 27 2018 contrib
drwxr-xr-x@ 32 xushaopeng staff 1.1K 3 27 2018 dist-maven
drwxr-xr-x@ 49 xushaopeng staff 1.6K 3 27 2018 docs
-rw-r--r--@ 1 xushaopeng staff 8.0K 3 27 2018 ivy.xml
-rw-r--r--@ 1 xushaopeng staff 1.7K 3 27 2018 ivysettings.xml
drwxr-xr-x@ 13 xushaopeng staff 442B 3 27 2018 lib
drwxr-xr-x@ 5 xushaopeng staff 170B 3 27 2018 recipes
drwxr-xr-x@ 14 xushaopeng staff 476B 3 27 2018 src
-rw-r--r--@ 1 xushaopeng staff 1.4M 3 27 2018 zookeeper-3.4.12.jar
-rw-r--r--@ 1 xushaopeng staff 819B 3 27 2018 zookeeper-3.4.12.jar.asc
-rw-r--r--@ 1 xushaopeng staff 33B 3 27 2018 zookeeper-3.4.12.jar.md5
-rw-r--r--@ 1 xushaopeng staff 41B 3 27 2018 zookeeper-3.4.12.jar.sha1
主要文件夹：
- bin：可执行文件
- conf：配置文件
- zoo_sample.cfg：需要我们设置
- contrib：附加的一些功能
- dist-maven：mvn编译后的目录
- docs：离线文档
- lib：依赖的jar包
- recipes：案例demo
- src：源码
zoo.cfg 配置
如果用上述源码的方式安装，conf 目录里没有 zoo.cfg，可以复制一份 zoo_sample.cfg，然后改名为 zoo.cfg
下面用 /usr/local/etc/zookeeper/zoo.cfg
# The number of milliseconds of each tick
# 用于计算的时间单元，下面的其它时间都是以这个tick为单位的
tickTime=2000
# The number of ticks that the initial
# synchronization phase can take
# 10个tick时间。用于集群，允许从节点连接并同步到master节点的初始化连接时间
initLimit=10
# The number of ticks that can pass between
# sending a request and getting an acknowledgement
# 主从节点发消息，请求和应答时间长度
syncLimit=5
# the directory where the snapshot is stored.
# do not use /tmp for storage, /tmp here is just
# example sakes.
# 数据存储的目录，必须配置
# 还有 daraLogDir, 日志目录，如果不配，和 dataDir 共用
dataDir=/usr/local/var/run/zookeeper/data
# the port at which the clients will connect
# 连接服务器的端口，默认2181。如果是伪分布式，即在单台部署多个zookeeper节点，那么可以改这个端口实现
clientPort=2181
# the maximum number of client connections.
# increase this if you need to handle more clients
#maxClientCnxns=60
#
# Be sure to read the maintenance section of the
# administrator guide before turning on autopurge.
#
# http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance
#
# The number of snapshots to retain in dataDir
#autopurge.snapRetainCount=3
# Purge task interval in hours
# Set to "0" to disable auto purge feature
#autopurge.purgeInterval=1
