Resize EC2 file system with lvm

On an EC2 server with an LVM file system, I need to increase the size of the / partition. First, increase the size of the volume in the Amazon AWS console as per Resize Amazon EC2 Boot Disk, once volume size is increased, you need to resize your filesystem.

[root@sok ~]# df -h
Filesystem           Size  Used Avail Use% Mounted on
devtmpfs             3.8G     0  3.8G   0% /dev
tmpfs                3.8G     0  3.8G   0% /dev/shm
tmpfs                3.8G   17M  3.8G   1% /run
tmpfs                3.8G     0  3.8G   0% /sys/fs/cgroup
/dev/mapper/cl-root   38G   33G  5.1G  87% /
/dev/nvme0n1p1      1014M  412M  603M  41% /boot
tmpfs                775M     0  775M   0% /run/user/0
[root@sok ~]# 

Here is result of parted -l

[root@sok ~]# parted -l
Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/cl-swap: 1074MB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Disk Flags: 

Number  Start  End     Size    File system     Flags
 1      0.00B  1074MB  1074MB  linux-swap(v1)


Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/cl-root: 40.7GB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Disk Flags: 

Number  Start  End     Size    File system  Flags
 1      0.00B  40.7GB  40.7GB  xfs


Model: NVMe Device (nvme)
Disk /dev/nvme0n1: 172GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags: 

Number  Start   End     Size    Type     File system  Flags
 1      1049kB  1075MB  1074MB  primary  xfs          boot
 2      1075MB  10.7GB  9663MB  primary               lvm
 3      10.7GB  16.1GB  5369MB  primary               lvm
 4      16.1GB  42.9GB  26.8GB  primary               lvm


[root@sok ~]# 

/dev/nvme0n1 was resized to 172 GB, but the 4th partition was only using 26 GB.

Resize the 4th partition with the command “growpart /dev/nvme0n1 4”

[root@sok ~]# growpart /dev/nvme0n1 4
CHANGED: partition=4 start=31457280 old: size=52428800 end=83886080 new: size=304087007 end=335544287
[root@sok ~]# parted /dev/nvme0n1 print
Model: NVMe Device (nvme)
Disk /dev/nvme0n1: 172GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags: 

Number  Start   End     Size    Type     File system  Flags
 1      1049kB  1075MB  1074MB  primary  xfs          boot
 2      1075MB  10.7GB  9663MB  primary               lvm
 3      10.7GB  16.1GB  5369MB  primary               lvm
 4      16.1GB  172GB   156GB   primary               lvm

[root@sok ~]#

Resize physical volume with “pvresize /dev/nvme0n1p4” command.

[root@sok ~]# pvresize /dev/nvme0n1p4
  Physical volume "/dev/nvme0n1p4" changed
  1 physical volume(s) resized or updated / 0 physical volume(s) not resized
[root@sok ~]#

Finally resize logical volume with the command “lvextend -r -l +100%FREE /dev/mapper/cl-root”. -r option resize the file system also.

[root@sok ~]# lvextend -r -l +100%FREE /dev/mapper/cl-root
  Size of logical volume cl/root changed from 37.90 GiB (9703 extents) to <157.99 GiB (40445 extents).
  Logical volume cl/root successfully resized.
meta-data=/dev/mapper/cl-root    isize=512    agcount=19, agsize=524032 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=0 spinodes=0
data     =                       bsize=4096   blocks=9935872, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal               bsize=4096   blocks=2560, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
data blocks changed from 9935872 to 41415680
[root@sok ~]# 

Now the size of the / portion is increased to use full available disk space.

[root@sok ~]# df -h
Filesystem           Size  Used Avail Use% Mounted on
devtmpfs             3.8G     0  3.8G   0% /dev
tmpfs                3.8G     0  3.8G   0% /dev/shm
tmpfs                3.8G   17M  3.8G   1% /run
tmpfs                3.8G     0  3.8G   0% /sys/fs/cgroup
/dev/mapper/cl-root  158G   33G  126G  21% /
/dev/nvme0n1p1      1014M  412M  603M  41% /boot
tmpfs                775M     0  775M   0% /run/user/0
[root@sok ~]# 
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