Linux扩容/根分区(vmware)

Linux扩容/根分区(vmware)

早上发现开发测试构建失败,如图

谷歌一下磁盘不够啦,小问题,删了一些没用的,释放后欧了,原来/分区是38G,然后我打算扩容到100G,无奈看了下剩余不够,就到70吧.

1.查看现有的分区大小

[root@jenkins ~]# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda3        38G   15G   24G  38% /
devtmpfs        2.0G     0  2.0G   0% /dev
tmpfs           2.0G     0  2.0G   0% /dev/shm
tmpfs           2.0G   12M  2.0G   1% /run
tmpfs           2.0G     0  2.0G   0% /sys/fs/cgroup
/dev/sda1      1014M  127M  888M  13% /boot
tmpfs           394M     0  394M   0% /run/user/0

2.关机增加磁盘大小为70G

3.查看磁盘扩容后的状态

[root@jenkins ~]# lsblk
NAME   MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda      8:0    0   70G  0 disk 
├─sda1   8:1    0    1G  0 part /boot
├─sda2   8:2    0    1G  0 part [SWAP]
└─sda3   8:3    0   68G  0 part /
sr0     11:0    1  4.3G  0 rom  
[root@jenkins ~]# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda3        38G   15G   24G  38% /
devtmpfs        2.0G     0  2.0G   0% /dev
tmpfs           2.0G     0  2.0G   0% /dev/shm
tmpfs           2.0G   12M  2.0G   1% /run
tmpfs           2.0G     0  2.0G   0% /sys/fs/cgroup
/dev/sda1      1014M  127M  888M  13% /boot
tmpfs           394M     0  394M   0% /run/user/0

#现在磁盘总大小为70G,/分区为38G

4.进行分区扩展磁盘，记住根分区起始位置和结束位置(start是默认),删除分区

[root@jenkins ~]# fdisk /dev/sda
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.


Command (m for help): p

Disk /dev/sda: 75.2 GB, 75161927680 bytes, 146800640 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: 0x000a9eca

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048     2099199     1048576   83  Linux
/dev/sda2         2099200     4196351     1048576   82  Linux swap / Solaris
/dev/sda3         4196352    83886079    39844864   83  Linux

Command (m for help): d                                 #删除分区,但不删除数据
Partition number (1-3, default 3): 1
Partition 1 is deleted

Command (m for help): d
Partition number (2,3, default 3): 2
Partition 2 is deleted

Command (m for help): d
Selected partition 3
Partition 3 is deleted

Command (m for help): p

Disk /dev/sda: 75.2 GB, 75161927680 bytes, 146800640 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: 0x000a9eca

   Device Boot      Start         End      Blocks   Id  System

5.创建原来的3个分区(start是默认的)

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): 1
First sector (2048-146800639, default 2048):                        #Enter
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-146800639, default 146800639): +1G   #分区大小
Partition 1 of type Linux and of size 1 GiB is set

Command (m for help): p

Disk /dev/sda: 75.2 GB, 75161927680 bytes, 146800640 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: 0x000a9eca

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1            2048     2099199     1048576   83  Linux

Command (m for help): p

Disk /dev/sda: 75.2 GB, 75161927680 bytes, 146800640 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: 0x000a9eca

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1            2048     2099199     1048576   83  Linux

Command (m for help): n
Partition type:
   p   primary (1 primary, 0 extended, 3 free)
   e   extended
Select (default p): p
Partition number (2-4, default 2): 2
First sector (2099200-146800639, default 2099200): 
Using default value 2099200
Last sector, +sectors or +size{K,M,G} (2099200-146800639, default 146800639): +1G
Partition 2 of type Linux and of size 1 GiB is set

Command (m for help): p

Disk /dev/sda: 75.2 GB, 75161927680 bytes, 146800640 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: 0x000a9eca

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1            2048     2099199     1048576   83  Linux
/dev/sda2         2099200     4196351     1048576   83  Linux

Command (m for help): n
Partition type:
   p   primary (2 primary, 0 extended, 2 free)
   e   extended
Select (default p): p
Partition number (3,4, default 3): 3
First sector (4196352-146800639, default 4196352): 
Using default value 4196352
Last sector, +sectors or +size{K,M,G} (4196352-146800639, default 146800639): 
Using default value 146800639
Partition 3 of type Linux and of size 68 GiB is set

Command (m for help): p

Disk /dev/sda: 75.2 GB, 75161927680 bytes, 146800640 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: 0x000a9eca

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1            2048     2099199     1048576   83  Linux
/dev/sda2         2099200     4196351     1048576   83  Linux
/dev/sda3         4196352   146800639    71302144   83  Linux

Command (m for help): wq
The partition table has been altered!

Calling ioctl() to re-read partition table.

WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table. The new table will be used at
the next reboot or after you run partprobe(8) or kpartx(8)
Syncing disks.

#这步操作后,不要reboot,否则就起不来了

6.刷新分区并查看分区状态

[root@jenkins ~]# partprobe /dev/sda
[root@jenkins ~]# lsblk
NAME   MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda      8:0    0   70G  0 disk 
├─sda1   8:1    0    1G  0 part /boot
├─sda2   8:2    0    1G  0 part [SWAP]
└─sda3   8:3    0   68G  0 part /
sr0     11:0    1  4.3G  0 rom  

[root@jenkins ~]# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda3        38G   15G   24G  38% /
devtmpfs        2.0G     0  2.0G   0% /dev
tmpfs           2.0G     0  2.0G   0% /dev/shm
tmpfs           2.0G   12M  2.0G   1% /run
tmpfs           2.0G     0  2.0G   0% /sys/fs/cgroup
/dev/sda1      1014M  127M  888M  13% /boot
tmpfs           394M     0  394M   0% /run/user/0

7.刷新/分区并查看状态

这里先查看自己的文件系统(cat /etc/fstab)

xfs_growfs 针对的文件系统xfs

resize2fs 针对文件系统ext2 ext3 ext4

[root@jenkins ~]# xfs_growfs /dev/sda3
meta-data=/dev/sda3              isize=512    agcount=4, agsize=2490304 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=0 spinodes=0
data     =                       bsize=4096   blocks=9961216, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal               bsize=4096   blocks=4863, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
data blocks changed from 9961216 to 17825536

[root@jenkins ~]# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda3        68G   15G   54G  21% /
devtmpfs        2.0G     0  2.0G   0% /dev
tmpfs           2.0G     0  2.0G   0% /dev/shm
tmpfs           2.0G   12M  2.0G   1% /run
tmpfs           2.0G     0  2.0G   0% /sys/fs/cgroup
/dev/sda1      1014M  127M  888M  13% /boot
tmpfs           394M     0  394M   0% /run/user/0