I had 20gigs initially ( when I converted from Boot2Docker+Vbox)
If I recreated the image it seems to have a max size of 64g.
Did some more digging…
I installed qemu
brew install qemu
I can use qemu’s tools to manipulate the image…
$ qemu-img info Docker.qcow2
image: Docker.qcow2
file format: qcow2
virtual size: 64G (68719476736 bytes)
disk size: 1.1G
cluster_size: 65536
Format specific information:
compat: 1.1
lazy refcounts: true
refcount bits: 16
corrupt: false
Add 5 more gigs
qemu-img resize Docker.qcow2 +5g
See size increase from 65g -> 69g
qemu-img info Docker.qcow2
image: Docker.qcow2
file format: qcow2
virtual size: 69G (74088185856 bytes)
disk size: 1.1G
cluster_size: 65536
Format specific information:
compat: 1.1
lazy refcounts: true
refcount bits: 16
corrupt: false
Download gpartd iso from http://gparted.org/download.php
Run Qemu with disk image + gparted and resize the FS … ( Should see 5g unallocated space )
qemu-system-x86_64 -drive file=Docker.qcow2 -m 512 -cdrom ~/Downloads/gparted-live-0.25.0-3-i686.iso -boot d -device usb-mouse -usb