Linux之磁盘扩容系列

2020-06-14  本文已影响0人  杀死一只喵
[root@jenkins-test ~]# fdisk -l

磁盘 /dev/sda:53.7 GB, 53687091200 字节,104857600 个扇区
Units = 扇区 of 1 * 512 = 512 bytes
扇区大小(逻辑/物理):512 字节 / 512 字节
I/O 大小(最小/最佳):512 字节 / 512 字节
磁盘标签类型:dos
磁盘标识符:0x00073f58

   设备 Boot      Start (启动)        End (终止)     Blocks (容量)  Id  System
/dev/sda1   *        2048      411647      204800   83  Linux
/dev/sda2          411648     8800255     4194304   82  Linux swap / Solaris
/dev/sda3         8800256   104857599    48028672   83  Linux
  1. 新添加一块20G 的硬盘


    image.png
  2. 执行 fdisk -l 就会有一块/dev/sdb2 的磁盘


    image.png
  3. 给/dev/sdb 进行分区

fdisk创建磁盘分区表 分区

p print 显示分区信息
n new 创建分区
d delete 删除分区
w write 保存退出
q quit 不保存退出

image.png
Command (m for help): n
Command action
   e   extended
   p   primary partition (1-4)
p     (创建主分区)
Partition number (1-4): 1
First sector (2048-417791, default 2048): 
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-417791, default 417791): +10M 
Command (m for help): n  
Command action
   e   extended
   p   primary partition (1-4)
e   )    (扩展分区)
Partition number (1-4): 2
First sector (22528-417791, default 22528): 
Using default value 22528
Last sector, +sectors or +size{K,M,G} (22528-417791, default 417791):  
Using default value 417791
Command (m for help): n
Command action
   l   logical (5 or over)
   p   primary partition (1-4)
l        (逻辑分区)
First sector (24576-417791, default 24576): 
Using default value 24576
Last sector, +sectors or +size{K,M,G} (24576-417791, default 417791): +50M
  1. 告诉系统磁盘空间变了
partprobe  /dev/sdb
  1. 格式化磁盘分区
mkfs.ext4 /dev/sdb1
  1. 关闭磁盘分区的自我检查功能
tune2fs -i 0 -c 0  /dev/sdb1
  1. 挂载磁盘
    7.1 临时挂载
    mount /dev/sdb1 /var/lib/docker

7.2 永久挂载、开机自动挂载
7.2.1 在/etc/rc.local加入
/bin/mount /dev/sdb1 /var/lib/docker

7.2.2

[root@jenkins-test ~]# vi /etc/fstab 
#
# /etc/fstab
# Created by anaconda on Wed Jul 17 14:07:03 2019
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
UUID=0254aef3-8ca4-44e2-953e-f38eca08c942 /                       xfs     defaults        0 0
UUID=9b9a3465-d6c0-4549-9cd6-07704cef1603 /boot                   xfs     defaults        0 0
UUID=d6770cd1-61de-4e8a-af92-f711d33ca4f1 swap                    swap    defaults        0 0
/dev/sdb1                                /var/lib/docker          ext4    defaults        0 0
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