【Zookeeper】Re01 安裝與操作

Zookeeper基於JDK開發出來的

運行環境至少需要JRE

 

快速安裝JDK：

yum install -y java-1.8.0-openjdk-devel.x86_64 

 

# ZK鏡像倉庫

https://downloads.apache.org/zookeeper/

 

# 下載 *.bin.tar.gz包

wget https://downloads.apache.org/zookeeper/zookeeper-3.7.0/apache-zookeeper-3.7.0-bin.tar.gz

 

# 解壓包

tar -zxvf apache-zookeeper-3.7.0-bin.tar.gz

 

# 將解壓出來的目錄復制到 /usr/local/下 （可選）

cp -r /root/apache-zookeeper-3.7.0-bin /usr/local/

 

# 將ZK備份的配置文件復制一份重命名為zoo.cfg

cp /usr/local/apache-zookeeper-3.7.0-bin/conf/zoo_sample.cfg /usr/local/apache-zookeeper-3.7.0-bin/conf/zoo.cfg

 

# 啟動ZK，停止ZK

/usr/local/apache-zookeeper-3.7.0-bin/bin/zkServer.sh start
/usr/local/apache-zookeeper-3.7.0-bin/bin/zkServer.sh stop

 

# 查看ZK狀態

/usr/local/apache-zookeeper-3.7.0-bin/bin/zkServer.sh status

 

# 啟動ZK失敗，查看日志信息

cat /usr/local/apache-zookeeper-3.7.0-bin/logs/zookeeper-root-server-localhost.localdomain.out

一般情況是8080端口占用，殺死該占用進程就好了

netstat -lntp | grep 8080

kill -9 8080端口的進程號

 

 

服務器基本操作命令：

# 啟動ZK，停止ZK 重啟ZK
/usr/local/apache-zookeeper-3.7.0-bin/bin/zkServer.sh start
/usr/local/apache-zookeeper-3.7.0-bin/bin/zkServer.sh stop
/usr/local/apache-zookeeper-3.7.0-bin/bin/zkServer.sh restart

# 查看ZK狀態
/usr/local/apache-zookeeper-3.7.0-bin/bin/zkServer.sh status

 

順便設置開機自啟動：

試了一下，並不會開啟。。。

vim /etc/rc.local
/usr/local/apache-zookeeper-3.7.0-bin/bin/zkServer.sh start

 

登陸 與 退出 ZK

# 登陸ZK
/usr/local/apache-zookeeper-3.7.0-bin/bin/zkCli.sh -server localhost:2181

# 退出ZK
quit

 

展示根節點信息：

[zk: localhost:2181(CONNECTED) 1] ls /
[zookeeper]
[zk: localhost:2181(CONNECTED) 2]

 

ZK節點信息：

[zk: localhost:2181(CONNECTED) 2] ls /zookeeper
[config, quota]
[zk: localhost:2181(CONNECTED) 3] 

 

創建節點（可連子節點）和數據

[zk: localhost:2181(CONNECTED) 3] create /sample aaa
Created /sample
[zk: localhost:2181(CONNECTED) 4] create /sample2
Created /sample2
[zk: localhost:2181(CONNECTED) 5]

 

# 創建臨時節點

create -e /tempNode

 

# 創建持久化順序節點

create -s /persistSortNode

 

# 創建臨時順序節點

create -s /tempSortNode

 

對已經存在的節點設置數據

[zk: localhost:2181(CONNECTED) 5] set /sample bbb
[zk: localhost:2181(CONNECTED) 6]

 

獲取節點上的數據，無數據則返回NULL

[zk: localhost:2181(CONNECTED) 7] get /sample
bbb

 

刪除節點（該節點包含后代節點則不能刪除）

[zk: localhost:2181(CONNECTED) 20] delete /sample
[zk: localhost:2181(CONNECTED) 21] 

 

刪除節點（包括后代節點一並刪除）

[zk: localhost:2181(CONNECTED) 20] deleteall /sample
[zk: localhost:2181(CONNECTED) 21] 

 

創建順序的持久化節點：

會自動在后面補上連號

[zk: localhost:2181(CONNECTED) 9] create -s /sequenNode
Created /sequenNode0000000002
[zk: localhost:2181(CONNECTED) 10] create -s /sequenNode
Created /sequenNode0000000003
[zk: localhost:2181(CONNECTED) 11] create -s /sequenNode
Created /sequenNode0000000004
[zk: localhost:2181(CONNECTED) 12] create -s /sequenNode
Created /sequenNode0000000005
[zk: localhost:2181(CONNECTED) 13] create -s /sequenNode
Created /sequenNode0000000006
[zk: localhost:2181(CONNECTED) 14] create -s /sequenNode
Created /sequenNode0000000007
[zk: localhost:2181(CONNECTED) 15] create -s /sequenNode
Created /sequenNode0000000008
[zk: localhost:2181(CONNECTED) 16] create -s /sequenNode
Created /sequenNode0000000009

 

 展示節點的詳細信息：

[zk: localhost:2181(CONNECTED) 22] ls -s /
[sample2, sequenNode0000000002, sequenNode0000000003, sequenNode0000000004, sequenNode0000000005, sequenNode0000000006, sequenNode0000000007, sequenNode0000000008, sequenNode0000000009, zookeeper]
cZxid = 0x0
ctime = Thu Jan 01 08:00:00 CST 1970
mZxid = 0x0
mtime = Thu Jan 01 08:00:00 CST 1970
pZxid = 0xe
cversion = 10
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 0
numChildren = 10
[zk: localhost:2181(CONNECTED) 23]