Find and create a partition with free space:
# parted
GNU Parted 2.3
Using /dev/sda
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) print free
Model: ATA Crucial_CT240M50 (scsi)
Disk /dev/sda: 240GB
Sector size (logical/physical): 512B/4096B
Partition Table: gpt
Number Start End Size File system Name Flags
17.4kB 1049kB 1031kB Free Space
1 1049kB 512MB 511MB fat32 EFI System Partition boot
2 512MB 768MB 256MB ext2 msftdata
3 768MB 18.8GB 18.0GB swap_1 lvm
4 18.8GB 68.8GB 50.0GB lvm
5 68.8GB 83.8GB 15.0GB es
6 83.8GB 100GB 16.2GB docker
100GB 240GB 140GB Free Space
We'll carve out a new 20GB partition:
(parted) mkpart
Partition name? []? docker-2
File system type? [ext2]?
Start? 100GB
End? 120GB
(parted) print
Model: ATA Crucial_CT240M50 (scsi)
Disk /dev/sda: 240GB
Sector size (logical/physical): 512B/4096B
Partition Table: gpt
Number Start End Size File system Name Flags
1 1049kB 512MB 511MB fat32 EFI System Partition boot
2 512MB 768MB 256MB ext2 msftdata
3 768MB 18.8GB 18.0GB swap_1 lvm
4 18.8GB 68.8GB 50.0GB lvm
5 68.8GB 83.8GB 15.0GB es
6 83.8GB 100GB 16.2GB docker
7 100GB 120GB 20.0GB docker-2
(parted) quit
So /dev/sda7 is our new physical allocation, but we need to bless it:
# pvcreate /dev/sda7
Physical volume "/dev/sda7" successfully created
Let's see the name of the volume group and logical volume we need to target:
# lvs
LV VG Attr LSize Pool Origin Data% Move Log Copy% Convert
docker_lib vg_docker -wi-ao--- 15.09g
es vg_es -wi-ao--- 14.00g
root vg_nuc -wi-ao--- 46.56g
swap vg_swap -wi-ao--- 16.76g
The volume is docker_lib but first we need to adjust its volume group, vg_docker:
# vgextend vg_docker /dev/sda7
Volume group "vg_docker" successfully extended
And to cross check that:
# vgs
VG #PV #LV #SN Attr VSize VFree
vg_docker 2 1 0 wz--n- 33.71g 18.62g
vg_es 1 1 0 wz--n- 14.00g 0
vg_nuc 1 1 0 wz--n- 46.56g 0
vg_swap 1 1 0 wz--n- 16.76g 0
Resize the logical volume (and its filesystem):
# lvresize --extents +100%FREE -r vg_docker/docker_lib
Extending logical volume docker_lib to 33.71 GiB
Logical volume docker_lib successfully resized
resize2fs 1.42.9 (4-Feb-2014)
Filesystem at /dev/mapper/vg_docker-docker_lib is mounted on /var/lib/docker; on-line resizing required
old_desc_blocks = 1, new_desc_blocks = 3
The filesystem on /dev/mapper/vg_docker-docker_lib is now 8837120 blocks long.
Awesome, it resized while online/in-use. Let's check:
# df -H
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_nuc-root 50G 20G 28G 42% /
none 4.1k 0 4.1k 0% /sys/fs/cgroup
udev 8.4G 13k 8.4G 1% /dev
tmpfs 1.7G 1.3M 1.7G 1% /run
none 5.3M 0 5.3M 0% /run/lock
none 8.4G 1.8M 8.4G 1% /run/shm
none 105M 0 105M 0% /run/user
/dev/sda2 248M 151M 85M 65% /boot
/dev/sda1 510M 7.0M 503M 2% /boot/efi
/dev/mapper/vg_es-es 15G 3.2G 11G 23% /var/lib/elasticsearch
/dev/mapper/vg_docker-docker_lib 36G 14G 20G 41% /var/lib/docker
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