여기에 대한 답변은 EBS 볼륨 크기를 변경하는 사람들을 위해 특별히 크기를 조정하기 전에 몇 단계가 누락 된 것 같습니다. 스냅 샷을 사용하여 EBS 또는 특정 AMI를 생성 한 경우 디스크 (xvda)를 확장하고 파티션 (xvda1)을 확장 한 다음 파일 시스템 (/)을 확장해야합니다.
이 글을 올바르게 읽으면 디스크가 다음과 같이 보입니다.
/dev/xvda
|__/dev/xvda1__|______________ Free space______________|
다음과 같아야합니다.
/dev/xvda
|______________________/dev/xvda1______________________|
그 후 실행 resize2fs
은 블록을 삭제하고 다시 생성하고 파티션을 부팅 가능하게하여 블록 크기를 늘릴 수있는를 xvda1
사용하여 새로운 공간으로 확장됩니다 fdisk
. 재부팅 만하면됩니다. 동일한 시작 실린더를 사용하는 경우 대부분의 경우 데이터에 영향을 미치지 않지만 파티션을 다시 만들 때 실수하면 모든 데이터가 손실되거나 서버가 재부팅되지 않습니다.
새로 만든 인스턴스의 첫 번째 단계로이 작업을 수행하는 것이 좋습니다. 그렇지 않으면 EC2 EBS 스토리지 등의 스냅 샷을 작성하십시오.
아래 블록에서 단계를 << # >>로 표시 했으므로 명령의 일부가 아닙니다. 루트 권한이 필요하므로 루트가 아닌 경우 "sudo sh"를 수행하십시오.
<<1>> Look at the filesystem, it is 6G
<<2>> Look at the disk and the partition, the disk is 21.5 GB but the partition is 6 GB (6291456 blocks)
<<3>> Start fdisk for that disk (xvda, so not the partition xvda1)
<<4>> Switch to sector display.
<<5>> Print the partition(s), and remember the start sector (2048 in the example).
<<6>> Delete the partition.
<<7>> Create a new partition.
<<8>> Make it primary.
<<9>> First partition.
<<10>> Enter the old start sector, do NOT make any typo here!!! (2048 in the example)
<<11>> Hit enter to accept the default (this is the remainder of the disk)
<<12>> Print the changes and make sure the start sector is ok, if not restart at <<6>>
<<13>> Make the partition bootable. do NOT forget this!!!
<<14>> Enter your partition number (1 in the example)
<<15>> Write the partition info back, this will end the fdisk session.
<<16>> Reboot the server, and wait for it to come up (this may take longer than usual).
<<17>> Verify the filesystem size.
<<18>> If the filesystem is not around 20Gb as expected, you can use this command.
# df -h <<1>>
Filesystem Size Used Avail Use% Mounted on
/dev/xvda1 6.0G 2.0G 3.7G 35% /
tmpfs 15G 0 15G 0% /dev/shm
# fdisk -l <<2>>
Disk /dev/xvda: 21.5 GB, 21474836480 bytes
97 heads, 17 sectors/track, 25435 cylinders
Units = cylinders of 1649 * 512 = 844288 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0003b587
Device Boot Start End Blocks Id System
/dev/xvda1 * 2 7632 6291456 83 Linux
# fdisk /dev/xvda <<3>>
WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
switch off the mode (command 'c') and change display units to
sectors (command 'u').
Command (m for help): u <<4>>
Changing display/entry units to sectors
Command (m for help): p <<5>>
Disk /dev/xvda: 21.5 GB, 21474836480 bytes
97 heads, 17 sectors/track, 25435 cylinders, total 41943040 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 identifier: 0x0003b587
Device Boot Start End Blocks Id System
/dev/xvda1 * 2048 12584959 6291456 83 Linux
Command (m for help): d <<6>>
Selected partition 1
Command (m for help): n <<7>>
Command action
e extended
p primary partition (1-4)
p <<8>>
Partition number (1-4): 1 <<9>>
First sector (17-41943039, default 17): 2048 <<10>>
Last sector, +sectors or +size{K,M,G} (2048-41943039, default 41943039): <<11>>
Using default value 41943039
Command (m for help): p <<12>>
Disk /dev/xvda: 21.5 GB, 21474836480 bytes
97 heads, 17 sectors/track, 25435 cylinders, total 41943040 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 identifier: 0x0003b587
Device Boot Start End Blocks Id System
/dev/xvda1 2048 41943039 20970496 83 Linux
Command (m for help): a <<13>>
Partition number (1-4): 1 <<14>>
Command (m for help): w <<15>>
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 16: ...
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.
# reboot <<16>>
<wait>
# df -h <<17>>
Filesystem Size Used Avail Use% Mounted on
/dev/xvda1 20G 2.0G 17G 11% /
tmpfs 15G 0 15G 0% /dev/shm
# resize2fs /dev/xvda1 <<18>>
resize2fs 1.41.12 (17-May-2010)
Filesystem at /dev/xvda1 is mounted on /; on-line resizing required
old desc_blocks = 1, new_desc_blocks = 2
Performing an on-line resize of /dev/xvda1 to 5242624 (4k) blocks.
The filesystem on /dev/xvda1 is now 5242624 blocks long.
root@vs120 [~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/xvda1 20G 7.8G 11G 42% /
tmpfs 498M 0 498M 0% /dev/shm
/usr/tmpDSK 399M 11M 368M 3% /tmp
root@vs120 [~]#