一、安裝並使用MariaDB作為Ambari、Hive、Hue的儲存資料庫。

yum install mariadb-server mariadb

啟動、檢視狀態，檢查mariadb是否成功安裝

systemctl start mariadb
systemctl status mariadb

二、配置mariadb

1，首先停止MariaDb 服務的執行 

systemctl stop mariadb

2，編輯/etc/my.cnf 在[mysqld]段下，新增如下幾行行配置：

transaction-isolation = READ-COMMITTED
max_connections 
 
= 550
innodb_flush_method = O_DIRECT

儲存退出後，配置mariadb服務開機啟動，並重新啟動MariaDB

systemctl enable mariadb
systemctl start mariadb

3，執行mariadb安全配置指令碼/usr/bin/mysql_secure_installation ，[email protected]，密碼這裡設為hadoop

/usr/bin/mysql_secure_installation

****授權使用者root使用密碼passwd從任意主機連線*到mysql伺服器

mysql -uroot -p
use mysql;
GRANT ALL PRIVILEGES ON 
 
*.* TO 'root'@'%' IDENTIFIED BY '****' WITH GRANT OPTION;
flush privileges;

**** 安裝MySQL JDBC Driver 連線 MariaDB

**** 下載、解壓縮，複製mysql-connector-java-5.1.46-bin.jar到/usr/share/java/，並重命名：

wget https://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-5.1.46.tar.gz
tar zxvf mysql-connector-java-5.1.46
 
.tar.gz
cd mysql-connector-java-5.1.46/
cp mysql-connector-java-5.1.46-bin.jar /usr/share/java/mysql-connector-java.jar