解决centos7 中使用mariadb 安装mysql不成功的问题

拼搏现实的明天。 2022-06-06 07:23 453阅读 0赞

按照openstack官网的步骤安装openstack

## Install and configure components[¶][Link 1] ##

1.  Install the packages:
    
        # yum install mariadb mariadb-server python2-PyMySQL

1.  Create and edit the `/etc/my.cnf.d/openstack.cnf` file and complete the following actions:
    
     *  Create a `[mysqld]` section, and set the `bind-address` key to the management IP address of the controller node to enable access by other nodes via the management network. Set additional keys to enable useful options and the UTF-8 character set:
        
            [mysqld]
            bind-address = 10.0.0.11
            
            default-storage-engine = innodb
            innodb_file_per_table = on
            max_connections = 4096
            collation-server = utf8_general_ci
            character-set-server = utf8

## Finalize installation[¶][Link 2] ##

1.  Start the database service and configure it to start when the system boots:
    
        # systemctl enable mariadb.service
        # systemctl start mariadb.service

问题来了，执行 systemctl start mariadb.service后，mariadb服务一直起不来

执行journalctl -xe 查看启动日志，发现

\[root@lancoo1 ~\]\# systemctl status mariadb.service   
● mariadb.service - MariaDB 10.1 database server  
   Loaded: loaded (/usr/lib/systemd/system/mariadb.service; enabled; vendor preset: disabled)  
   Active: failed (Result: exit-code) since Tue 2017-11-07 15:41:32 CST; 10s ago  
  Process: 4150 ExecStopPost=/usr/libexec/mysql-wait-stop (code=exited, status=0/SUCCESS)  
  Process: 4134 ExecStart=/usr/libexec/mysqld --basedir=/usr $MYSQLD\_OPTS $\_WSREP\_NEW\_CLUSTER (code=exited, status=1/FAILURE)  
  Process: 4097 ExecStartPre=/usr/libexec/mysql-prepare-db-dir %n (code=exited, status=0/SUCCESS)  
  Process: 4074 ExecStartPre=/usr/libexec/mysql-check-socket (code=exited, status=0/SUCCESS)  
 Main PID: 4134 (code=exited, status=1/FAILURE)  
   Status: "MariaDB server is down"  
  
  
Nov 07 15:41:32 lancoo1 systemd\[1\]: Starting MariaDB 10.1 database server...  
Nov 07 15:41:32 lancoo1 mysql-prepare-db-dir\[4097\]: Database MariaDB is probably initialized in /var/lib/mysql already, nothing is done.  
Nov 07 15:41:32 lancoo1 mysql-prepare-db-dir\[4097\]: If this is not the case, make sure the /var/lib/mysql is empty before running mysql-prepare-db-dir.  
Nov 07 15:41:32 lancoo1 mysqld\[4134\]: 2017-11-07 15:41:32 140737353783488 \[Note\] /usr/libexec/mysqld (mysqld 10.1.20-MariaDB) starting as process 4134 ...  
Nov 07 15:41:32 lancoo1 systemd\[1\]: mariadb.service: main process exited, code=exited, status=1/FAILURE  
Nov 07 15:41:32 lancoo1 systemd\[1\]: Failed to start MariaDB 10.1 database server.  
Nov 07 15:41:32 lancoo1 systemd\[1\]: Unit mariadb.service entered failed state.  
Nov 07 15:41:32 lancoo1 systemd\[1\]: mariadb.service failed.

上述错误日志表明 mysql 数据库都还没有建立好  所以服务起不来，这根单独 的mysql服务有区别

![Image 1][]

问题： **chown: changing ownership of '/var/lib/mysql': Operation not permitted **

** failed to start mariadb 10.1 database server**

1： 发现是权限不够，首先检查防火墙是否开启，发现防火墙没有开

2：删除原先mysql相关的服务 进程 配置文件

rm -rf /etc/my.cnf

rm -rf /var/lib/mysql/\*

rpm -qa |grep mysql

准备工作

chown -R  mysql:mysql  /var/lib/mysql

//先初始化数据库

sudo mysql\_install\_db --datadir=/home/mysql --user=root --defaults-file=/etc/my.cnf.d/openstack.cnf

//启动服务  
   systemctl start mariadb

//查看状态  
   systemctl status mariadb.service

给keystone文件777 权限

chmod 777 /etc/keystone/keystone.conf

[Link 1]: https://docs.openstack.org/install-guide/environment-sql-database-rdo.html#install-and-configure-components
[Link 2]: https://docs.openstack.org/install-guide/environment-sql-database-rdo.html#finalize-installation
[Image 1]: