ZooKeeper是一個分布式開源架構,提供了協調分布式應用的基本服務,它向外部應用暴露一組通用服務——分布式同步(Distributed Synchronization).命名服務(Naming Service).叢集維護(Group Maintenance)等,簡化分布式應用協調及其管理的難度,提供高性能的分布式服務。ZooKeeper本身可以以Standalone模式安裝運作,不過它的長處在于通過分布式ZooKeeper叢集(一個Leader,多個Follower),基于一定的政策來保證ZooKeeper叢集的穩定性和可用性,進而實作分布式應用的可靠性。(我是網上抄寫的,友善大家學習,請勿吐槽!!)
這裡先講解一下單節點安裝(後期會提供叢集安裝模式),由于直接進行操作,故下面記錄詳細步驟:
ZooKeeper Standalone模式
1.修改作業系統的/etc/hosts 檔案中添加
# zookeeper servers (主機IP jeesz-provider-01)
[root@cloud ~]# vi/etc/hosts
xxx.xxx.xxx.xxxjeesz-provider-01
2.到 http://apache.fayea.com/zookeeper/下載下傳 zookeeper-3.4.6
[root@cloud ~]# wgethttp://apache.fayea.com/zookeeper/zookeeper-3.4.6/zookeeper-3.4.6.tar.gz
由于我提前下載下傳了并上傳到了我指定的目錄:/home/jeesz
3. 解壓zookeeper 安裝包
[root@cloud jeesz] tar -zxvfzookeeper-3.4.6.tar.gz
4. 在/home/jeesz/zookeeper-3.4.6目錄下建立以下目錄
[root@cloud ~]# cd /home/jeesz/zookeeper-3.4.6
[root@cloud zookeeper-3.4.6]# mkdirdata
[[email protected]]# mkdir logs
5.将 zookeeper-3.4.6/conf 目錄下的 zoo_sample.cfg 檔案拷貝一份,命名為為zoo.cfg
[[email protected]]# cpzoo_sample.cfg zoo.cfg
6.修改 zoo.cfg 配置檔案
[[email protected] conf]# vizoo.cfg
# The number ofmilliseconds of each tick
tickTime=2000
# The number of ticksthat the initial
# synchronization phasecan take
initLimit=10
# The number of ticksthat can pass between
#sending a request and getting an acknowledgement
syncLimit=5
# the directory wherethe snapshot is stored.
# donot use /tmp for storage, /tmp here is just
# example sakes.
dataDir=/home/jeesz/zookeeper-3.4.6/data
dataLogDir=/home/jeesz/zookeeper-3.4.6/logs
# the port at which theclients will connect
clientPort=2181
#2888,3888 are election port
server.1=jeesz-provider-01:2888:3888
7.在/home/jeesz/zookeeper-3.4.6/data 下建立 myid 檔案
編輯 myid 檔案,并在對應的 IP 的機器上輸入對應的編号。如在 zookeeper 上,myid
檔案内容就是 1。如果隻在單點上進行安裝配置,那麼隻有一個 server.1。
[[email protected] data]# vi myid
1
8.jeesz 使用者下修改 vi /home/jeesz/.bash_profile,增加 zookeeper 配置
[[email protected] ~] vi /home/jeesz/.bash_profile
# zookeeper env
exportZOOKEEPER_HOME=/home/jeesz/zookeeper-3.4.6
exportPATH=$ZOOKEEPER_HOME/bin:$PATH
使配置檔案生效
[[email protected]~]# source/home/jeesz/.bash_profile
9.在防火牆中打開要用到的端口 2181.2888.3888
切換到 root 使用者權限,執行以下指令:
[[email protected] ~]# chkconfig iptables on
[[email protected] ~]# service iptables start
編輯/etc/sysconfig/iptables
[[email protected] ~]# vi /etc/sysconfig/iptables
增加以下 3 行:
-A INPUT -m state --stateNEW -m tcp -p tcp --dport 2181 -j ACCEPT
-A INPUT -m state --stateNEW -m tcp -p tcp --dport 2888 -j ACCEPT
-A INPUT -m state --stateNEW -m tcp -p tcp --dport 3888 -j ACCEPT
重新開機防火牆:
[[email protected] ~] service iptables restart
檢視防火牆端口狀态:
[[email protected]]# serviceiptables status
Table: filter
Chain INPUT (policyACCEPT)
num target prot opt source destination
1 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 stateRELATED,ESTABLISHED
2 ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0
3 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0
4 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:22
5 REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-withicmp-host-prohibited
6 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:8080
7 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:2181
8 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:2888
9 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:3888
Chain FORWARD (policyACCEPT)
num target prot opt source destination
1 REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-withicmp-host-prohibited
Chain OUTPUT (policyACCEPT)
num target prot opt source destination
10.啟動并測試 zookeeper
(1) 到/home/jeesz/zookeeper-3.4.6/bin 目錄中執行:
[[email protected] bin]# zkServer.shstart
(2) 輸入 jps 指令檢視程序:
[[email protected]]# jps
48064 Jps
47348 QuorumPeerMain
46826 Bootstrap
其中,QuorumPeerMain 是 zookeeper 程序,啟動正常
(3) 檢視狀态:
[[email protected] bin]# zkServer.shstatus
JMX enabled by default
Using config: /home/jeesz/zookeeper-3.4.6/bin/../conf/zoo.cfg
Mode: standalone
(4) 檢視 zookeeper 服務輸出資訊:
由于服務資訊輸出檔案在/home/jeesz/zookeeper-3.4.6/bin/zookeeper.out
[[email protected]]# tail -fzookeeper.out
2016-02-16 02:20:14,500[myid:] - INFO [main:[email protected]] - Reading configuration from:/home/jeesz/zookeeper-3.4.6/bin/../conf/zoo.cfg
2016-02-16 02:20:14,700[myid:] - ERROR [main:[email protected]] - Invalid configuration, only oneserver specified (ignoring)
......
11.停止 zookeeper 程序
[[email protected]]# zkServer.shstop
12.配置 zookeeper 開機使用jeesz 使用者啟動
編輯/etc/rc.local 檔案,加入:
[[email protected]]# vi /etc/rc.local
su - jeesz -c'/home/jeesz/zookeeper-3.4.6/bin/zkServer.sh start'
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