【分布式協調zookeeper】安裝篇
阿新 • • 發佈：2017-06-17
zookeeper 部署 創建、編輯、刪除
一、環境準備
操作系統：centOS-6.8 2.6.32-642.el6.x86_64【虛擬機環境】
節點主機：10.0.55.3、10.0.55.5、10.0.55.6
目錄結構： /opt/
軟件版本： jdk-7u67-linux-x64.rpm
zookeeper-3.5.0-alpha.tar.gz二、安裝Java環境
$ rpm -ivh jdk-7u67-linux-x64.rpm $ cat /etc/profile export JAVA_HOME=/usr/java/jdk1.7.0_67 export CLASSPATH=$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib export PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH:$HOME/bin 立即生效 $ source /etc/profile
三、下載zookeeper包並創建zookeeper管理數據
$ wget http://archive.apache.org/dist/zookeeper/zookeeper-3.5.0-alpha/zookeeper-3.5.0-alpha.tar.gz $ ln -s /opt/zookeeper-3.5.0-alpha /opt/zookeeper $ mkdir /opt/zookeeper/data $ echo "1" > /opt/zookeeper/data/myid
四、編輯zookeeper/conf/zoo.cfg配置文件，啟動時需要
$ cp /opt/zookeeper/conf/zoo_sample.cfg /opt/zookeeper/conf/zoo.cfg --- 查看zoo.cfg內容 --- tickTime=2000 initLimit=10 syncLimit=5 dataDir=/opt/zookeeper/data clientPort=2181 server.1=10.0.55.3:2888:3888 server.2=10.0.55.5:2888:3888 server.3=10.0.55.6:2888:3888
五、啟動zookeeper服務並查看
--- 啟動服務 --- $ /opt/zookeeper/bin/zkServer.sh start JMX enabled by default Using config: /opt/zookeeper/bin/../conf/zoo.cfg Starting zookeeper ... STARTED --- 檢查端口 --- netstat -lnpt Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 0.0.0.0:22678 0.0.0.0:* LISTEN 1074/sshd tcp 0 0 :::2181 :::* LISTEN 121685/java tcp 0 0 :::55369 :::* LISTEN 121685/java tcp 0 0 ::ffff:10.0.55.3:3888 :::* LISTEN 121685/java tcp 0 0 :::8080 :::* LISTEN 121685/java tcp 0 0 :::22678 :::* LISTEN 1074/sshd
使用自動化運維工具 ansible 進行批量分發
這裏只介紹如何使用ansible的命令組件模塊進行節點部署
為了節省篇幅，這裏不介紹ansible的部署安裝
1、遠程安裝zookeeper節點
$ ansible webservers -m copy -a ‘src=zookeeper-3.5.0-alpha.tar.gz dest=/opt/ owner=root group=root mode=0644‘ $ ansible webservers -m shell -a ‘tar fxz /opt/zookeeper-3.5.0-alpha.tar.gz -C /opt/‘ $ ansible webservers -m shell -a ‘ln -s /opt/zookeeper-3.5.0-alpha /opt/zookeeper‘ $ ansible webservers -m shell -a ‘mkdir /opt/zookeeper/data‘ $ ansible webservers -m shell -a ‘echo "2" >/opt/zookeeper/data/myid‘
2、將配置文件copy到遠端節點
$ ansible webservers -m copy -a ‘src=/opt/zookeeper/conf/zoo.cfg dest=/opt/zookeeper/conf/zoo.cfg owner=root group=root mode=0644‘
3、批量啟動zookeeper服務並查看
$ ansible webservers -m shell -a ‘/opt/zookeeper/bin/zkServer.sh stats‘ $ ansible webservers -m shell -a ‘netstat -lnpt‘
4、批量堅持zookeeper狀態
$ ansible webservers -m shell -a ‘/opt/zookeeper/bin/zkServer.sh status‘ 10.0.55.5 | SUCCESS | rc=0 >> Client port found: 2181 Mode: leaderJMX enabled by default ## 這裏面的mode信息中，該主機被選舉為 Leader Using config: /opt/zookeeper/bin/../conf/zoo.cfg 10.0.55.3 | SUCCESS | rc=0 >> Client port found: 2181 Mode: followerJMX enabled by default ## 這裏面的mode信息中，該主機被選舉為 follower Using config: /opt/zookeeper/bin/../conf/zoo.cfg 10.0.55.6 | SUCCESS | rc=0 >> Client port found: 2181 Mode: followerJMX enabled by default ## 這裏面的mode信息中，該主機被選舉為 follower Using config: /opt/zookeeper/bin/../conf/zoo.cfg
zookeeper基礎操作
啟動一個CLI客戶端
[[email protected] opt]# ./zookeeper/bin/zkCli.sh
創建、編輯、刪除znode
--- 創建一個/workers路徑的znode --- [zk: localhost:2181(CONNECTED) 0] create /workers helloworld Created /workers --- 使用get -s命令查看znode數據 --- [zk: localhost:2181(CONNECTED) 1] get -s /workers helloworld cZxid = 0x500000006 ctime = Sat Apr 22 10:33:42 CST 2017 mZxid = 0x500000006 mtime = Sat Apr 22 10:33:42 CST 2017 pZxid = 0x500000006 cversion = 0 dataVersion = 0 aclVersion = 0 ephemeralOwner = 0x0 dataLength = 6 numChildren = 0 --- 使用get -w選項，進行監聽/factory的變化 --- [zk: localhost:2181(CONNECTED) 11] get -w /workers strong --- 在 follower節點上啟動客戶端，並修改/workers --- [[email protected] bin]# ./zkCli.sh [zk: localhost:2181(CONNECTED) 2] set /workers weakness ---查看監聽那臺主機，返回的通知信息如下： --- [zk: localhost:2181(CONNECTED) 12] WATCHER:: WatchedEvent state:SyncConnected type:NodeDataChanged path:/workers --- 刪除workers的znode --- [zk: localhost:2181(CONNECTED) 7] delete /workers
創建序列znode
[zk: localhost:2181(CONNECTED) 13] create -s /workers/worker- Created /workers/worker-0000000000 [zk: localhost:2181(CONNECTED) 14] create -s /workers/worker- Created /workers/worker-0000000001 [zk: localhost:2181(CONNECTED) 15] create -s /workers/worker- Created /workers/worker-0000000002 [zk: localhost:2181(CONNECTED) 16] create -s /workers/worker- Created /workers/worker-0000000003
通過stat命令，進行查看workers狀態
[zk: localhost:2181(CONNECTED) 18] stat /workers cZxid = 0x500000006 ctime = Sat Apr 22 10:33:42 CST 2017 mZxid = 0x500000008 mtime = Sat Apr 22 10:35:25 CST 2017 pZxid = 0x50000000c cversion = 4 dataVersion = 1 aclVersion = 0 ephemeralOwner = 0x0 dataLength = 8 numChildren = 4
通過瀏覽器查看zookeeper狀態
--- 從zookeeper-3.5.0版本以上，可以使用http接口提交4字命令的請求； --- 在zookeeper服務中嵌入了Jetty server作為AdminServer管理服務器，其默認端口為8080； --- 服務訪問的URL格式是"/commands/[command name]"，例如：訪問stats命令 --- 服務器返回的結果是以JSON格式顯示 http://10.0.55.3:8080/commands http://10.0.55.3:8080/commands/stats
本文出自 “靠譜兒” 博客，請務必保留此出處http://liubao0312.blog.51cto.com/2213529/1939224
【分布式協調zookeeper】安裝篇