Re: [gentoo-dev] Creating development virtual machine

[Robin H. Johnson]

On Sat, Aug 20, 2016 at 05:15:13PM -0700, Daniel Campbell wrote:
> ready-to-go Gentoo installs that come with some needed
> software.
Release Engineering does already publish cloud-ready stage4 tarballs.

In the very near future, I intend to for releng/infra to be publishing
the pre-converted qcow2 images, but for the moment, you can convert them
yourselves:

1. Grab a cloud stage4:
$ curl http://distfiles.gentoo.org/releases/amd64/autobuilds/current-stage4-amd64-hardened+cloud/stage4-amd64-hardened+cloud-20160811.tar.bz2

2. emerge app-emulation/diskimage-builder

3. symlink the tarball as needed:
$ ln -s stage4-amd64-hardened+cloud-20160811.tar.bz2 gentoo-stage4-hardened.tar.bz2

4. Convert it to a QCOW2 disk image:
$ GENTOO_PROFILE=hardened/linux/amd64 \
  DIB_IMAGE_CACHE=`pwd` disk-image-create \
  --offline \
  --image-size 2 \
  --mkfs-options='-T news,floppy' \
  gentoo vm

5. Use image.qcow2 in the dir to boot the VM, either with cloud-init to
inject a root password/ssh keys, or modify the image yourself first
(convert to raw format, loopmount w/ -o offset=$((1024*1024)), convert
back to QCOW2 afterwards).

6. You'll want to look at growpart and related tools if you intend to
having space to work on stuff on the VM; it's deliberately very small,
and I'd like to shave a little more space off to fit into a 1GiB disk
with more room to spare.

** Right now:
- 1GiB volume w/ ~50MiB free
- 2GiB volume w/ ~1050MiB free
- 1536MiB volume w/ ~679MiB free


-- 
Robin Hugh Johnson
Gentoo Linux: Dev, Infra Lead, Foundation Trustee & Treasurer
E-Mail   : robbat2@g.o
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