centos7挂载新硬盘并修改mariadb的存放路径

编程

mariadb 5.5

原则上yum安装的mariadb都可以

因为/var/lib/mysql 和/etc/my.cnf的路径都是一样的

之所以要进行这个操作时因为zabbix的历史问题日志把磁盘写满了,只能新加一个硬盘把mysql存放路径改一改

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我这个是已经挂载好了,但是步骤都是一样的

首先添加一个硬盘,

查看 fdisk -l

[root@sm-zabbix mysql]# fdisk -l

Disk /dev/sda: 128.8 GB, 128849018880 bytes, 251658240 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk label type: dos

Disk identifier: 0x000d7265

Device Boot Start End Blocks Id System

/dev/sda1 * 2048 2099199 1048576 83 Linux

/dev/sda2 2099200 10487807 4194304 82 Linux swap / Solaris

/dev/sda3 10487808 251658239 120585216 83 Linux

Disk /dev/sdb: 1099.5 GB, 1099511627776 bytes, 2147483648 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

了解到新增的为/dev/sdb

然后 fdisk /dev/sdb

然后依次输入np回车回车w

Command (m for help): n

Partition type:

p primary (0 primary, 0 extended, 4 free)

e extended

Select (default p): p

Partition number (1-4, default 1):

First sector (2048-2147483647, default 2048):

Using default value 2048

Last sector, +sectors or +size{K,M,G} (2048-2147483647, default 2147483647):

Using default value 2147483647

Partition 1 of type Linux and of size 1024 GiB is set

[root@sm-zabbix mysql]# fdisk /dev/sdb

Welcome to fdisk (util-linux 2.23.2).

Changes will remain in memory only, until you decide to write them.

Be careful before using the write command.

Device does not contain a recognized partition table

Building a new DOS disklabel with disk identifier 0xfa020d7f.

Command (m for help): m

Command action

a toggle a bootable flag

b edit bsd disklabel

c toggle the dos compatibility flag

d delete a partition

g create a new empty GPT partition table

G create an IRIX (SGI) partition table

l list known partition types

m print this menu

n add a new partition

o create a new empty DOS partition table

p print the partition table

q quit without saving changes

s create a new empty Sun disklabel

t change a partition"s system id

u change display/entry units

v verify the partition table

w write table to disk and exit

x extra functionality (experts only)

m查看操作选项,n是新建一个分区,然后选择分区类型,p是主分区,两下回车就是默认扇形区域,代表选择/dev/sdb下的所有空间,最后按w保存

分区分好之后就是格式化,这里我们选择格式化为xfs格式的

mkfs.xfs -f /dev/sdb

然后新建一个/data目录

挂载上去

mount -t xfs /dev/sdb /data

[root@sm-zabbix mysql]# df -Th

Filesystem Type Size Used Avail Use% Mounted on

/dev/sda3 xfs 115G 4.7G 111G 5% /

devtmpfs devtmpfs 3.9G 0 3.9G 0% /dev

tmpfs tmpfs 3.9G 0 3.9G 0% /dev/shm

tmpfs tmpfs 3.9G 8.9M 3.9G 1% /run

tmpfs tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup

/dev/sdb xfs 1.0T 62M 1.0T 1% /data

/dev/sda1 xfs 1014M 174M 841M 18% /boot

tmpfs tmpfs 783M 12K 783M 1% /run/user/42

tmpfs tmpfs 783M 0 783M 0% /run/user/0

此时通过df -TH就可以看到已挂载好了,然后就是设置开机挂载

vim /etc/fstab

UUID=08749ee0-0982-4b75-8d57-dd5b10543557 /                       xfs     defaults        0 0

UUID=c71dd609-a108-4585-aa7f-b4bb1548e2d7 /boot xfs defaults 0 0

UUID=984a1a4e-6415-49cc-809e-5de22137e0ac swap swap defaults 0 0

/dev/sdb /data xfs defaults 0 0

把最后一行加上就是了,复制第一二行的然后粘贴到最后把相关的改一下就行了,至此挂载硬盘就已经完成,不放心的可以再重启试下,接下来开始变更mysql存放路径了

首先关掉mariadb

systemctl stop mariadb

把数据库放置的位置变一下(以下的yum安装的路径,如果是源码编译或者其他方式安装的,请参照/etc/my.cnf文件中的位置,ps:话说源码编译的my.cnf的路径是不是也变了? 那你find / -name my.cnf 自己找一找吧)

cp -a /var/lib/mysql /data # -a 是保留文件 文件夹的权限

[root@sm-zabbix ~]# cd /data/

[root@sm-zabbix data]# ll

total 0

drwxr-xr-x 5 mysql mysql 177 Jan 18 15:16 mysql

[root@sm-zabbix data]#

然后

vim /etc/my.cnf 

[mysqld]

#datadir=/var/lib/mysql

datadir=/data/mysql

#socket=/var/lib/mysql/mysql.sock

socket=/data/mysql/mysql.sock

然后启动mariadb

systemctl start mariadb

启动没报错就把之前/var/lib/mysql下的删掉吧

最后如果是zabbix的话这样一番操作会有报错,大意是不能连接到/var/lib/mysql/mysql.sock

这时候ln -s /data/mysql/mysql.sock /var/lib/mysql/mysql.sock 就可以了

如果需要安装zabbix的方法可以看看我之前的文章,链接我自己也懒得找链接放过来

以上是 centos7挂载新硬盘并修改mariadb的存放路径 的全部内容, 来源链接: utcz.com/z/512860.html

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