centos 7对ECS进行挂载数据盘,并切换MySQL数据保存目录到数据盘
测试需要,申请了阿里云的ECS服务器,用来搭建MySQL,搭建时候没有注意,没想到运维大哥那么体贴的申请了数据盘,还是SSD的,这样也就需要把原来MySQL数据存储路径换到数据盘。
操作数据盘
首先查看当前服务器是否有数据盘:fdisk -l
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| Disk /dev/vda: 53.7 GB, 53687091200 bytes, 104857600 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: 0x0008d73a
Device Boot Start End Blocks Id System /dev/vda1 * 2048 104855551 52426752 83 Linux
Disk /dev/vdb: 107.4 GB, 107374182400 bytes, 209715200 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
|
可以看到当前服务上面有两个盘/dev/vda
和/dev/vdb
,其中/dev/vda
是系统盘,并且已经有分区/dev/vda1
,经常使用的查看磁盘的命令是df -h
,但是有个问题,如果你的数据盘没有分区、挂载,使用df -h
是不会显示的,只会展示这样:
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| Filesystem Size Used Avail Use% Mounted on /dev/vda1 50G 3.1G 44G 7% / devtmpfs 16G 0 16G 0% /dev tmpfs 16G 0 16G 0% /dev/shm tmpfs 16G 520K 16G 1% /run tmpfs 16G 0 16G 0% /sys/fs/cgroup tmpfs 3.2G 0 3.2G 0% /run/user/0
|
数据盘分区
查找到数据盘/dev/vdb
之后,对它进行分区:fdisk /dev/vdb
,
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| 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 0x39e32289.
|
接下来是有几个选项,选择适合的选项即可:
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| Command (m for help): 输入'n',创建一个新分区 Partition type: 输入'p',选择主分区 Partition number (1-4, default 1): 输入'1',仅创建一个分区 First sector (2048-209715199, default 2048): 我用的默认 Last sector, +sectors or +size{K,M,G} (2048-209715199, default 209715199): 同样默认
|
接下来wq
保存退出即可。
然后这个时候fdisk -l
,就能看见新的分区:
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| Disk /dev/vda: 53.7 GB, 53687091200 bytes, 104857600 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: 0x0008d73a
Device Boot Start End Blocks Id System /dev/vda1 * 2048 104855551 52426752 83 Linux
Disk /dev/vdb: 107.4 GB, 107374182400 bytes, 209715200 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: 0x39e32289
Device Boot Start End Blocks Id System /dev/vdb1 2048 209715199 104856576 83 Linux
|
格式化分区
首先新建文件夹:cd /home
、mkdir mysql
挂载:mount /dev/vdb1 /home/mysql
在新分区上创建文件系统:mkfs.ext4 /dev/vdb1
备份/etc/fstab
:cp /etc/fstab /etc/fstab.bak
查找当前磁盘分区的UUID:blkid
向 /etc/fstab 写入新分区信息:vim /etc/fstab
,写入UUID=ec7443b1-14e4-4174-ae8a-2194484a754b /home/mysql ext4 defaults 0 0
(UUID是之前获得的)
复制MySQL数据
复制数据:mv /var/lib/mysql/* /home/mysql
修改配置:vim /etc/my.cnf
,修改数据文件到/home/mysql
重启MySQL
OVER~