分布式协调服务Zookeeper集群搭建

　　　　　　　　　　　　　　分布式协调服务Zookeeper集群搭建

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　作者：尹正杰

一.安装jdk环境

1>.操作环境

[root@node101.yinzhengjie.org.cn ~]# cat /etc/redhat-release 
CentOS Linux release 7.6.1810 (Core) 
[root@node101.yinzhengjie.org.cn ~]# 
[root@node101.yinzhengjie.org.cn ~]# uname -r
3.10.0-957.el7.x86_64
[root@node101.yinzhengjie.org.cn ~]# 
[root@node101.yinzhengjie.org.cn ~]# uname -m
x86_64
[root@node101.yinzhengjie.org.cn ~]# 
[root@node101.yinzhengjie.org.cn ~]# cat /etc/hosts | grep yinzhengjie　　　　　　　　　　　　#注意，本片博客只有3台测试机，每台测试机器必须得配置jdk环境！
172.30.1.101 node101.yinzhengjie.org.cn
172.30.1.102 node102.yinzhengjie.org.cn
172.30.1.103 node103.yinzhengjie.org.cn
[root@node101.yinzhengjie.org.cn ~]# 
[root@node101.yinzhengjie.org.cn ~]# free -h
              total        used        free      shared  buff/cache   available
Mem:           3.7G        331M        2.9G        9.4M        570M        3.3G
Swap:          2.0G          0B        2.0G
[root@node101.yinzhengjie.org.cn ~]#

2>.打开Oracle官方网站下载相应的平台的安装包（https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html）

3>.卸载平台中已经存在的JDK版本

[root@node101.yinzhengjie.org.cn ~]# java -version
openjdk version "1.8.0_201"
OpenJDK Runtime Environment (build 1.8.0_201-b09)
OpenJDK 64-Bit Server VM (build 25.201-b09, mixed mode)
[root@node101.yinzhengjie.org.cn ~]# 
[root@node101.yinzhengjie.org.cn ~]# rpm -qa *openjdk*
java-1.7.0-openjdk-headless-1.7.0.191-2.6.15.5.el7.x86_64
java-1.7.0-openjdk-1.7.0.191-2.6.15.5.el7.x86_64
java-1.8.0-openjdk-headless-1.8.0.201.b09-2.el7_6.x86_64
java-11-openjdk-headless-11.0.ea.28-7.el7.x86_64
java-1.8.0-openjdk-devel-1.8.0.201.b09-2.el7_6.x86_64
java-11-openjdk-11.0.ea.28-7.el7.x86_64
java-1.8.0-openjdk-1.8.0.201.b09-2.el7_6.x86_64
[root@node101.yinzhengjie.org.cn ~]# 
[root@node101.yinzhengjie.org.cn ~]# 
[root@node101.yinzhengjie.org.cn ~]# rpm -e --nodeps java-1.7.0-openjdk-headless-1.7.0.191-2.6.15.5.el7.x86_64　　　　　　　　　　#卸载JDK版本！
[root@node101.yinzhengjie.org.cn ~]# rpm -e --nodeps java-1.7.0-openjdk-1.7.0.191-2.6.15.5.el7.x86_64
[root@node101.yinzhengjie.org.cn ~]# rpm -e --nodeps java-1.8.0-openjdk-headless-1.8.0.201.b09-2.el7_6.x86_64
[root@node101.yinzhengjie.org.cn ~]# rpm -e --nodeps java-11-openjdk-headless-11.0.ea.28-7.el7.x86_64
[root@node101.yinzhengjie.org.cn ~]# rpm -e --nodeps java-1.8.0-openjdk-devel-1.8.0.201.b09-2.el7_6.x86_64
[root@node101.yinzhengjie.org.cn ~]# rpm -e --nodeps java-11-openjdk-11.0.ea.28-7.el7.x86_64
[root@node101.yinzhengjie.org.cn ~]# rpm -e --nodeps java-1.8.0-openjdk-1.8.0.201.b09-2.el7_6.x86_64
[root@node101.yinzhengjie.org.cn ~]# 
[root@node101.yinzhengjie.org.cn ~]# rpm -qa *openjdk*
[root@node101.yinzhengjie.org.cn ~]# 
[root@node101.yinzhengjie.org.cn ~]# java -version
-bash: /usr/bin/java: No such file or directory
[root@node101.yinzhengjie.org.cn ~]#

4>.将下载的jdk版本进行解压安装并配置环境变量（如果你下载的是rpm包的oracle jdk的话就无需配置环境变量啦！）

[root@node101.yinzhengjie.org.cn ~]# mkdir /yinzhengjie/softwares -p
[root@node101.yinzhengjie.org.cn ~]# 
[root@node101.yinzhengjie.org.cn ~]# tar -zxf jdk-8u201-linux-x64.tar.gz -C /yinzhengjie/softwares/
[root@node101.yinzhengjie.org.cn ~]#
[root@node101.yinzhengjie.org.cn ~]# ll /yinzhengjie/softwares/jdk1.8.0_201/
total 383856
drwxr-xr-x. 2   10  143      4096 Dec 16 03:45 bin
-r--r--r--. 1   10  143      3244 Dec 16 03:45 COPYRIGHT
-rw-r--r--. 1 root root 366447449 Apr  9 15:27 hadoop-2.9.2.tar.gz
drwxr-xr-x. 3   10  143      4096 Dec 16 03:45 include
-rw-r--r--. 1   10  143   5207434 Dec 12 17:07 javafx-src.zip
drwxr-xr-x. 5   10  143      4096 Dec 16 03:45 jre
drwxr-xr-x. 5   10  143      4096 Dec 16 03:45 lib
-r--r--r--. 1   10  143        40 Dec 16 03:45 LICENSE
drwxr-xr-x. 4   10  143      4096 Dec 16 03:45 man
-r--r--r--. 1   10  143       159 Dec 16 03:45 README.html
-rw-r--r--. 1   10  143       424 Dec 16 03:45 release
-rw-r--r--. 1   10  143  21103945 Dec 16 03:45 src.zip
-rw-r--r--. 1   10  143    108109 Dec 12 17:07 THIRDPARTYLICENSEREADME-JAVAFX.txt
-r--r--r--. 1   10  143    155002 Dec 16 03:45 THIRDPARTYLICENSEREADME.txt
[root@node101.yinzhengjie.org.cn ~]# 
[root@node101.yinzhengjie.org.cn ~]# tail -3 /etc/profile
#Add by yinzhengjie
JAVA_HOME=/yinzhengjie/softwares/jdk1.8.0_201
PATH=$PATH:$JAVA_HOME/bin
[root@node101.yinzhengjie.org.cn ~]# 
[root@node101.yinzhengjie.org.cn ~]# source /etc/profile
[root@node101.yinzhengjie.org.cn ~]# 
[root@node101.yinzhengjie.org.cn ~]# java -version       
java version "1.8.0_201"
Java(TM) SE Runtime Environment (build 1.8.0_201-b09)
Java HotSpot(TM) 64-Bit Server VM (build 25.201-b09, mixed mode)
[root@node101.yinzhengjie.org.cn ~]#

5>.将环境同步到其他节点

[root@node101.yinzhengjie.org.cn ~]# ssh-keygen -t rsa -P '' -f ~/.ssh/id_rsa
Generating public/private rsa key pair.
Created directory '/root/.ssh'.
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:Ytkk9uzXOlYJPLDRaUAyqDzYv1n3CRk6NjN/nuhDbDo root@node101.yinzhengjie.org.cn
The key's randomart image is:
+---[RSA 2048]----+
|     .o.oo .     |
|    .  oo +      |
| + .  o .*       |
|. =  . Bo +      |
|   o  +oSo o .   |
|    ..OoB  .o    |
|     = @.o.o.    |
|    o E oo*o     |
|       oo=+.     |
+----[SHA256]-----+
[root@node101.yinzhengjie.org.cn ~]#

[root@node101.yinzhengjie.org.cn ~]# ssh-keygen -t rsa -P '' -f ~/.ssh/id_rsa