How to resize a root volume in Alpine LInux

Incus
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How to resize a volume in incus for alpine linux

Sometimes when you use default instance types in incus, the default root volume is too low. This mostly applies to alpine linux, which has a default root volume size of only 2gb! Be sure to do the INCUS commands first!

Steps:

  1. install cloud-utils-growpart
  2. install e2fsprogrs-extra
  3. growpart /dev/sda 2
  4. resize2fs /dev/sda2

On the incus side you need to run some commands too:

incus config device override <vm name> root size=<sizeingb>50Gib

This stop the vm restart it, and then do the top steps and POOF nice big volume.

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Or you can avoid that complexity if you use the “cloud” variant, as cloud-init sorts this for you.

# incus launch images:alpine/edge/cloud foo --vm -c security.secureboot=false -d root,size=15GiB

# incus exec foo -- df -k /
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/sda2             15068900    316228  14736288   2% /