无法调整 AWS EC2 卷的大小

Question

我创建了一个具有 8GB 根卷的 AWS EC2 Linux 实例。然后我将 EBS 卷增加到 9GB，它进入了完成状态。这是一个小卷，所以调整大小需要几分钟才能完成。

现在我尝试在使用here 中提到的说明调整卷大小后扩展 linux 文件系统。但是，我收到以下错误消息。我试了两次，整个过程。但都是一样的。

The filesystem is already 2096635 (4k) blocks long.  Nothing to do!

这是图片的屏幕截图。

有人可以帮我吗？

Answer 1

只需重启实例，因为它会在启动时自动调整根文件系统的大小。

我自己试过了。这是一个 8GB 卷的实例：

[ec2-user@ip-172-31-15-216 ~]$ lsblk
NAME    MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
xvda    202:0    0   8G  0 disk 
└─xvda1 202:1    0   8G  0 part /

[ec2-user@ip-172-31-15-216 ~]$ df -h
Filesystem      Size  Used Avail Use% Mounted on
devtmpfs        236M   56K  236M   1% /dev
tmpfs           246M     0  246M   0% /dev/shm
/dev/xvda1      7.8G  985M  6.7G  13% /

修改 EBS 卷后：

[ec2-user@ip-172-31-15-216 ~]$ lsblk
NAME    MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
xvda    202:0    0   9G  0 disk 
└─xvda1 202:1    0   8G  0 part /

[ec2-user@ip-172-31-15-216 ~]$ df -h
Filesystem      Size  Used Avail Use% Mounted on
devtmpfs        236M   56K  236M   1% /dev
tmpfs           246M     0  246M   0% /dev/shm
/dev/xvda1      7.8G  985M  6.7G  13% /

重启后：

[ec2-user@ip-172-31-15-216 ~]$ lsblk
NAME    MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
xvda    202:0    0   9G  0 disk 
└─xvda1 202:1    0   9G  0 part /

[ec2-user@ip-172-31-15-216 ~]$ df -h
Filesystem      Size  Used Avail Use% Mounted on
devtmpfs        236M   56K  236M   1% /dev
tmpfs           246M     0  246M   0% /dev/shm
/dev/xvda1      8.8G  984M  7.7G  12% /

另请参阅：increase EC2 EBS volume after cloning - resize2fs not working

Answer 2

# http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/storage_expand_partition.html
# Before goging to do this, detach and attach the root volume to anothe instance
# Note:
#   1) Before detach the volume, please make a note of device name which going to
#      detch from the machine, why because we should mention same name when attaching back, otherwise data will be lost
#   2)

# Identifying device name which we want to expand
lsblk

# Running parted command on the device
sudo parted /dev/xvdf

# Changing the parted units of measure to sectors.
unit s

# Run the print command to list the partitions on the device
print
# if it shows warning, chose fix

# Delete the partition entry for the partition using the number (1) from the previous step
rm 1 # number 1 will change based the partition we want to delete

# Create a new partition that extends to the end of the volume
mkpart Linux 4096s 100%

# Run the print command again to verify your partition
print

# Check to see that any flags that were present earlier are still
# present for the partition that you expanded. In some cases the boot
# flag may be lost. If a flag was dropped from the partition when it was expanded,
# add the flag with the following command, substituting your partition number and the flag name.
# For example, the following command adds the boot flag to partition 1
set 1 boot on

#Run the quit command to exit parted.
quit

# verfiying the device
sudo e2fsck -f /dev/xvdf1