Zookeeper-5分钟快速掌握分布式应用程序协调服

➜  ~ brew info zookeeper
zookeeper: stable 3.4.10 (bottled), HEAD
Centralized server for distributed coordination of services
https://zookeeper.apache.org/
Not installed
From: https://github.com/Homebrew/homebrew-core/blob/master/Formula/zookeeper.rb
==> Requirements
Optional: python ✔
==> Options
--with-perl
    Build Perl bindings
--with-python
    Build with python support
--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

➜  ~ brew install zookeeper
Please wait for it to finish or terminate it to continue.
==> Downloading https://homebrew.bintray.com/bottles/zookeeper-3.4.10.sierra.bottle.tar.gz
######################################################################## 100.0%
==> Pouring zookeeper-3.4.10.sierra.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/3.4.10: 241 files, 31.4MB

➜  zookeeper ll
total 32
-rw-r--r--  1 huangweijie  admin    67B  9  4 22:13 defaults
-rw-r--r--  1 huangweijie  admin   339B  9  4 22:13 log4j.properties
-rw-r--r--  1 huangweijie  admin   941B  9  4 22:13 zoo.cfg
-rw-r--r--  1 huangweijie  admin   941B  9  4 22:13 zoo_sample.cfg

# The number of milliseconds of each tick
tickTime=2000
# The number of ticks that the initial
# synchronization phase can take
initLimit=10
# The number of ticks that can pass between
# sending a request and getting an acknowledgement
syncLimit=5
# the directory where the snapshot is stored.
# do not use /tmp for storage, /tmp here is just
# example sakes.
dataDir=/usr/local/var/run/zookeeper/data
# the port at which the clients will connect
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

tickTime=2000
dataDir=/usr/local/zk/data
dataLogDir=/usr/local/zk/dataLog        
clientPort=2181

➜  zookeeper 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}

➜  zookeeper zkServer start
ZooKeeper JMX enabled by default
Using config: /usr/local/etc/zookeeper/zoo.cfg
Starting zookeeper ... STARTED

➜  zookeeper zkServer status
ZooKeeper JMX enabled by default
Using config: /usr/local/etc/zookeeper/zoo.cfg
Mode: standalone

➜  zookeeper zkServer stop
ZooKeeper JMX enabled by default
Using config: /usr/local/etc/zookeeper/zoo.cfg
Stopping zookeeper ... STOPPED

➜  ~ zkCli
Connecting to localhost:2181
Welcome to ZooKeeper!
JLine support is enabled

WATCHER::

WatchedEvent state:SyncConnected type:None path:null
[zk: localhost:2181(CONNECTED) 0]

server.1=localhost:2287:3387
server.2=localhost:2288:3388
server.3=localhost:2289:3389

server.1=10.192.1.120:2288:3388
server.2=10.192.1.121:2288:3388
server.3=10.192.1.122:2288:3388

除了使用Ip 直接访问外，也可以在本地设置host 域名解析，设置成相应的映射：

host 文件添加

10.192.1.120   slave-01  
10.192.1.121   slave-02  
10.192.1.122   slave-03 

zookeeper 配置文件：

server.1=slave-01:2888:3888  
server.2=slave-02:2888:3888  
server.3=slave-03:2888:3888

#f milliseconds of each tick
tickTime=2000

# The number of ticks that the initial
# synchronization phase can take
initLimit=10

# The number of ticks that can pass between
# sending a request and getting an acknowledgement
syncLimit=5

# the directory where the snapshot is stored.
dataDir=/usr/local/var/run/zookeeper/zoo2/data

# the port at which the clients will connect
clientPort=2182

#f milliseconds of each tick
tickTime=2000

# The number of ticks that the initial
# synchronization phase can take
initLimit=10

# The number of ticks that can pass between
# sending a request and getting an acknowledgement
syncLimit=5

# the directory where the snapshot is stored.
dataDir=/usr/local/var/run/zookeeper/zoo1/data

# the port at which the clients will connect
clientPort=2181

#the location of the log file

server.1=localhost:2287:3387
server.2=localhost:2288:3388
server.3=localhost:2289:3389

➜  zookeeper ll
total 56
-rw-r--r--  1 huangweijie  admin    67B  9  4 22:13 defaults
-rw-r--r--  1 huangweijie  admin   339B  9  4 22:13 log4j.properties
-rw-r--r--  1 huangweijie  admin   941B  9  4 22:13 zoo.cfg
-rw-r--r--  1 huangweijie  admin   512B  9 11 21:01 zoo1.cfg
-rw-r--r--  1 huangweijie  admin   512B  9 11 21:01 zoo2.cfg
-rw-r--r--  1 huangweijie  admin   512B  9 11 21:13 zoo3.cfg
-rw-r--r--  1 huangweijie  admin   941B  9  4 22:13 zoo_sample.cfg

➜  zookeeper ll
total 0
drwxr-xr-x  3 huangweijie  admin   102B  9 11 20:47 data
drwxr-xr-x  4 huangweijie  admin   136B  9 11 20:33 zoo1
drwxr-xr-x  4 huangweijie  admin   136B  9 11 20:33 zoo2
drwxr-xr-x  4 huangweijie  admin   136B  9 11 20:55 zoo3

zookeeper echo "1" zoo1/data/myid
zookeeper echo "2" zoo2/data/myid
zookeeper echo "3" zoo3/data/myid

➜  zookeeper zkServer start zoo1.cfg
ZooKeeper JMX enabled by default
Using config: /usr/local/etc/zookeeper/zoo1.cfg
Starting zookeeper ... STARTED
➜  zookeeper zkServer start zoo2.cfg
ZooKeeper JMX enabled by default
Using config: /usr/local/etc/zookeeper/zoo2.cfg
Starting zookeeper ... STARTED
➜  zookeeper zkServer start zoo3.cfg
ZooKeeper JMX enabled by default
Using config: /usr/local/etc/zookeeper/zoo3.cfg
Starting zookeeper ... STARTED

➜  zookeeper jps
13024 QuorumPeerMain
13176 QuorumPeerMain
13007 QuorumPeerMain
13183 Jps

➜  zookeeper zkServer status zoo1.cfg
ZooKeeper JMX enabled by default
Using config: /usr/local/etc/zookeeper/zoo1.cfg
Mode: follower
➜  zookeeper zkServer status zoo2.cfg
ZooKeeper JMX enabled by default
Using config: /usr/local/etc/zookeeper/zoo2.cfg
Mode: leader

create [-s] [-e] path data acl

create -s /zk-temp 123

create -e /zk-temp 123

create /zk-temp 123

[zk: localhost:2181(CONNECTED) 1] ls /
[zookeeper]

[zk: localhost:2181(CONNECTED) 4] get /zk
myData
cZxid = 0x500000006
ctime = Fri Oct 17 03:54:20 PDT 2014
mZxid = 0x500000006
mtime = Fri Oct 17 03:54:20 PDT 2014
pZxid = 0x500000006
cversion = 0
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 6
numChildren = 0

set path data [version]

[zk: localhost:2181(CONNECTED) 5] set /zk Jayce
cZxid = 0x500000006
ctime = Fri Oct 17 03:54:20 PDT 2014
mZxid = 0x500000007
mtime = Fri Oct 17 03:55:50 PDT 2014
pZxid = 0x500000006
cversion = 0
dataVersion = 1
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 9
numChildren = 0

[zk: localhost:2181(CONNECTED) 6] get /zk
Jayce
cZxid = 0x500000006
ctime = Fri Oct 17 03:54:20 PDT 2014
mZxid = 0x500000007
mtime = Fri Oct 17 03:55:50 PDT 2014
pZxid = 0x500000006
cversion = 0
dataVersion = 1
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 9
numChildren = 0

delete path [version]

[zk: localhost:2181(CONNECTED) 7] delete /zk
[zk: localhost:2181(CONNECTED) 8] ls /
[zookeeper]