上一节修改好基本配置后，接下来开始安装集群部署所需依赖。

修改搭建集群前的基本配置及环境依赖

1. 三台虚拟机关闭防火墙并查看状态

   systemctl stop firewalld
   systemctl disable firewalld
   systemctl status firewalld
   

2. 配置三台机器免密互信
   主节点创建公钥，并将公钥放入keys

   ssh-keygen -t dsa -P ‘’ -f ~/.ssh/id_dsa
   cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys

   从节点创建接收文件夹

   mkdir ~/.ssh

   主节点发送公钥给两个从节点

   scp ~/.ssh/authorized_keys root@siger-slave01.test.com:~/.ssh/authorized_keys
   scp ~/.ssh/authorized_keys root@siger-slave02.test.com:~/.ssh/authorized_keys

   所有主机执行

   chmod 600 ~/.ssh/authorized_keys

3. 安装jdk
   移动刚才上传的jdk安装包到指定目录并解压

   mv /opt/java /usr/local/
   tar -zxvf /usr/local/java/jdk-8u102-linux-x64.tar.gz
   

   通过scp将解压后的jdk传到其他slave节点

   scp -r /usr/local/java/ root@siger-slave01.test.com:/usr/local/
   scp -r /usr/local/java/ root@siger-slave02.test.com:/usr/local/

   所有节点编辑环境变量

   vim /etc/profile

   在文件最后增加以下内容

   JAVA_HOME=/usr/local/java/jdk1.8.0_102
   JRE_HOME=/usr/local/java/jdk1.8.0_102/jre
   
   PATH=$PATH:/sbin/:$JAVA_HOME/bin:$CATALINA_HOME/bin
   
   CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:
   export JAVA_HOME JRE_HOME PATH CLASSPATH
   

   
   所有节点更改后，编译环境变量并查看jdk是否安装成功

   . /etc/profile
   java
   javac
   java -version
   

4. python3环境安装
   移动安装包到指定目录下

   mv /opt/python3 /usr/local/

   所有节点下操作相同,安装所需依赖(96M左右)

   yum install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gcc make

   主节点进入Python3安装包目录，解压，编译安装

   cd /usr/local/python3
   tar -xvJf Python-3.6.2.tar.xz
   cd Python-3.6.2
   ./configure prefix=/usr/local/python3 --with-ssl
   make && make install
   
   
   

   从master节点上分发给所有slave节点

   scp -r /usr/local/python3/ root@siger-slave01.test.com:/usr/local/
   scp -r /usr/local/python3/ root@siger-slave02.test.com:/usr/local/

   所有节点操作相同，建立软链接，并查看

   ln -s /usr/local/python3/bin/python3 /usr/bin/python3
   ln -s /usr/local/python3/bin/pip3 /usr/bin/pip3
   python3 -V
   pip3 -V
   

5. mysql安装
   主节点操作，安装mysql存储ambari集群元文件。
   查看是否有其他数据库服务

   rpm -qa|grep -i mysql
   rpm -qa|grep -i MariaDB
   

   卸载其他数据库服务，如果不卸载，安装mysql会出错。

   rpm -ev mariadb-libs-5.5.56-2.el7.x86_64 --nodeps

   移动安装包到安装目录并解压

   mv /opt/mysql /usr/local/
   cd /usr/local/mysql/
   tar -xvf mysql-5.7.19-1.el7.x86_64.rpm-bundle.tar
   
   逐个安装
   rpm -ivh mysql-community-libs-5.7.19-1.el7.x86_64.rpm --nodeps
   rpm -ivh mysql-community-client-5.7.19-1.el7.x86_64.rpm --nodeps
   rpm -ivh mysql-community-libs-compat-5.7.19-1.el7.x86_64.rpm --nodeps
   rpm -ivh mysql-community-common-5.7.19-1.el7.x86_64.rpm --nodeps
   rpm -ivh mysql-community-minimal-debuginfo-5.7.19-1.el7.x86_64.rpm --nodeps
   rpm -ivh mysql-community-devel-5.7.19-1.el7.x86_64.rpm --nodeps
   rpm -ivh mysql-community-server-5.7.19-1.el7.x86_64.rpm --nodeps
   rpm -ivh mysql-community-embedded-5.7.19-1.el7.x86_64.rpm --nodeps
   rpm -ivh mysql-community-server-minimal-5.7.19-1.el7.x86_64.rpm --nodeps
   rpm -ivh mysql-community-embedded-compat-5.7.19-1.el7.x86_64.rpm --nodeps
   rpm -ivh mysql-community-test-5.7.19-1.el7.x86_64.rpm --nodeps
   rpm -ivh mysql-community-embedded-devel-5.7.19-1.el7.x86_64.rpm --nodeps

   安装完成启动mysql

   service mysqld start

   设置开机启动项

   systemctl enable mysqld.service

   查看初始密码并设置新密码

   grep “password” /var/log/mysqld.log
   mysql -u root -p
   set password = password(‘123456’);
   

   创建mysql用户及权限

   create database ambari character set utf8;
   CREATE USER ‘ambari’@’%‘IDENTIFIED BY ‘Siger_123’;
   GRANT ALL PRIVILEGES ON . TO ‘ambari’@’%’;
   CREATE USER ‘ambari’@'localhost’IDENTIFIED BY ‘Siger_123’;
   GRANT ALL PRIVILEGES ON . TO ‘ambari’@‘localhost’;
   FLUSH PRIVILEGES;

基本工作做好了，开始集群搭建。
Ambari大数据集群快速搭建（三）