Centos8安裝Zookeeper3.6.1

下載zookeeper：

官網地址 http://zookeeper.apache.org/
下載直達 Zookeeper3.6.1

[root@localhost zookeeper]# wget https://mirrors.tuna.tsinghua.edu.cn/apache/zookeeper/zookeeper-3.6.1/apache-zookeeper-3.6.1-bin.tar.gz
[root@localhost zookeeper]# ll
total 12148
-rw-r--r-- 1 root root 12436328 May 25 22:26 apache-zookeeper-3.6.1-bin.tar.gz
[root@localhost zookeeper]# 

解壓

[root@localhost zookeeper]# tar -zxvf apache-zookeeper-3.6.1-bin.tar.gz 
[root@localhost zookeeper]# ll
total 12148
drwxr-xr-x 6 root root      133 May 25 22:27 apache-zookeeper-3.6.1-bin
-rw-r--r-- 1 root root 12436328 May 25 22:26 apache-zookeeper-3.6.1-bin.tar.gz
[root@localhost zookeeper]# 

安裝

創建數據目錄:

[root@localhost zookeeper]# mkdir data
[root@localhost zookeeper]# mkdir data/zookeeper

修改配置文件

[root@localhost zookeeper]# cd apache-zookeeper-3.6.1-bin
apache-zookeeper-3.6.1-bin/        apache-zookeeper-3.6.1-bin.tar.gz  
[root@localhost zookeeper]# cd apache-zookeeper-3.6.1-bin/conf/
[root@localhost conf]# ll
total 12
-rw-r--r-- 1 1000 1000  535 Apr 21 22:59 configuration.xsl
-rw-r--r-- 1 1000 1000 3435 Apr 21 22:59 log4j.properties
-rw-r--r-- 1 1000 1000 1148 Apr 21 22:59 zoo_sample.cfg
[root@localhost conf]# cp zoo_sample.cfg zoo.cfg
[root@localhost conf]# ll
total 16
-rw-r--r-- 1 1000 1000  535 Apr 21 22:59 configuration.xsl
-rw-r--r-- 1 1000 1000 3435 Apr 21 22:59 log4j.properties
-rw-r--r-- 1 root root 1148 May 25 22:52 zoo.cfg
-rw-r--r-- 1 1000 1000 1148 Apr 21 22:59 zoo_sample.cfg
[root@localhost conf]# vi zoo.cfg 

dataDir=/home/work/zookeeper/data/zookeeper
clientPort=2181

[root@localhost conf]# 

配置系統變量

配置系統變量

把二進制命令的路徑加入系統path
說明：在末尾增加以下命令

[root@localhost apache-zookeeper-3.6.1-bin]# vi /etc/profile

# zookeeper
export ZK_HOME=/home/work/zookeeper/apache-zookeeper-3.6.1-bin
export PATH=$ZK_HOME/bin:$PATH

生效

[root@localhost apache-zookeeper-3.6.1-bin]# source /etc/profile
[root@localhost apache-zookeeper-3.6.1-bin]# 

啓動和停止zookeeper

• 啓動 zkServer.sh start
• 停止 zkServer.sh stop

[root@localhost apache-zookeeper-3.6.1-bin]# zkServer.sh start
ZooKeeper JMX enabled by default
Using config: /home/work/zookeeper/apache-zookeeper-3.6.1-bin/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
[root@localhost apache-zookeeper-3.6.1-bin]# zkServer.sh stop
ZooKeeper JMX enabled by default
Using config: /home/work/zookeeper/apache-zookeeper-3.6.1-bin/bin/../conf/zoo.cfg
Stopping zookeeper ... STOPPED
[root@localhost apache-zookeeper-3.6.1-bin]# 

增加systemd管理

新建service文件

創建systemd文件

[root@localhost apache-zookeeper-3.6.1-bin]# vi /etc/systemd/system/zookeeper.service
[root@localhost apache-zookeeper-3.6.1-bin]# 

插入內容

[Unit]
Description=zookeeper.service After=network.target
ConditionPathExists=/home/work/zookeeper/apache-zookeeper-3.6.1-bin/conf/zoo.cfg
[Service] Type=forking User=root Group=root
ExecStart=/home/work/zookeeper/apache-zookeeper-3.6.1-bin/bin/zkServer.sh
start
ExecStop=/home/work/zookeeper/apache-zookeeper-3.6.1-bin/bin/zkServer.sh
stop [Install] WantedBy=multi-user.target

使用systemctl啓動zookeeper失敗

直接使用systemctl啓動zookeeper會因找不到java的路徑報錯

[root@localhost apache-zookeeper-3.6.1-bin]# systemctl start zookeeper
Job for zookeeper.service failed because the control process exited
with error code. See “systemctl status zookeeper.service” and
“journalctl -xe” for details.

我們需要手動修改zkEnv.sh文件：

[root@localhost apache-zookeeper-3.6.1-bin]# vi bin/zkEnv.sh 

編輯的內容：
增加在 ZOOBINDIR 前面即可

JAVA_HOME=/home/work/java/jdk1.8.0_191

ZOOBINDIR="${ZOOBINDIR:-/usr/bin}"
ZOOKEEPER_PREFIX="${ZOOBINDIR}/.."

測試systemctl的管理：

• 啓動 systemctl start zookeeper
• 停止 systemctl stop zookeeper

[root@localhost apache-zookeeper-3.6.1-bin]# systemctl start zookeeper
[root@localhost apache-zookeeper-3.6.1-bin]# systemctl stop zookeeper

如何查看當前已安裝的zookeeper的版本?

[root@localhost conf]# echo stat|nc 127.0.0.1 2181
stat is not executed because it is not in the whitelist.
說明：需要解決上面這個報錯

[root@localhost conf]# vi /usr/local/soft/apache-zookeeper-3.5.6-bin/bin/zkServer.sh
編輯的內容:

找到:

else
echo “JMX disabled by user request” >&2
ZOOMAIN=“org.apache.zookeeper.server.quorum.QuorumPeerMain”
fi

在上面這行fi下面添加：

ZOOMAIN="-Dzookeeper.4lw.commands.whitelist=* ${ZOOMAIN}"
繼續測試

[root@localhost conf]# systemctl stop zookeeper
[root@localhost conf]# systemctl start zookeeper
[root@localhost conf]# echo stat|nc 127.0.0.1 2181
Zookeeper version: 3.5.6-c11b7e26bc554b8523dc929761dd28808913f091, built on 10/08/2019 20:18 GMT
Clients:
/127.0.0.1:413520

Latency min/avg/max: 0/0/0
Received: 1
Sent: 0
Connections: 1
Outstanding: 0
Zxid: 0x0
Mode: standalone
Node count: 5

關閉zookeeper內置的管理器

zookeeper內置有一個web管理器，默認使用8080端口， 但這個版本的管理器不能正常訪問， 我們可以避免啓動內置的管理器，也避免佔用8080端口
zoo.cfg中添加如下一行：

admin.enableServer=false

admin.enableServer=false