原因
阿里云ECS云盘扩容后,在Linux服务器上没有生效
实际需要几条命令扩容才能正式生效。
处理方法
- 先看扩容前磁盘空间,
/dev/vda1
可以看到只有40G。
# df -Th
Filesystem Type Size Used Avail Use% Mounted on
devtmpfs devtmpfs 7.5G 0 7.5G 0% /dev
tmpfs tmpfs 7.6G 0 7.6G 0% /dev/shm
tmpfs tmpfs 7.6G 496K 7.6G 1% /run
tmpfs tmpfs 7.6G 0 7.6G 0% /sys/fs/cgroup
/dev/vda1 ext4 40G 36G 2.0G 95% /
tmpfs tmpfs 1.6G 0 1.6G 0% /run/user/0
- 扩容后看到有200G
/dev/vda: 214.7 GB
,现在准备扩容分配给vda1
# fdisk -l
Disk /dev/vda: 214.7 GB, 214748364800 bytes, 419430400 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: 0x000bf134
Device Boot Start End Blocks Id System
/dev/vda1 * 2048 83886046 41941999+ 83 Linux
- 首先安装工具
yum install -y cloud-utils-growpart
- 扩容需要的分区
运行growpart
命令,为需要扩容的云盘和对应的第几个分区扩容。
/dev/vda 1 ,表示为系统盘的第一个分区扩容。
# growpart /dev/vda 1
CHANGED: partition=1 start=2048 old: size=83883999 end=83886047 new: size=419428319 end=419430367
- 通过
resize2fs
重设分区大小
# resize2fs /dev/vda1
resize2fs 1.42.9 (28-Dec-2013)
Filesystem at /dev/vda1 is mounted on /; on-line resizing required
old_desc_blocks = 3, new_desc_blocks = 13
The filesystem on /dev/vda1 is now 52428539 blocks long.
- 最后再查看磁盘,发现
/dev/vda1
扩容成功
# df -Th
Filesystem Type Size Used Avail Use% Mounted on
devtmpfs devtmpfs 7.5G 0 7.5G 0% /dev
tmpfs tmpfs 7.6G 0 7.6G 0% /dev/shm
tmpfs tmpfs 7.6G 496K 7.6G 1% /run
tmpfs tmpfs 7.6G 0 7.6G 0% /sys/fs/cgroup
/dev/vda1 ext4 197G 36G 154G 19% /
tmpfs tmpfs 1.6G 0 1.6G 0% /run/user/0