An experiment after Hashiconf Digital 2020 for building a minimal Linux Nomad agent. This build has been developed and tested on Fedora 32, and copies some local dependencies into the qcow image during packaging. Qemu-img must be installed and the nbd kernel module loaded to mount the qcow2 image created during buildimg.sh. Accompanying blog post on Medium: https://medium.com/@boeroboy/nomad-vs-systemd-e0db80d34e8a
Here we attempt to turn HashiCorp's Cloud Operating Model upside down, using Nomad as a foundation to run everything from scratch rather than Terraform to provision first.
Source for sdhcp can be found here: https://git.2f30.org/sdhcp/.
Source for Linux kernel built directly:
git clone --depth=1 git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
cd linux
# Some distros require a make allnoconfig first.
make allnoconfig
make kvm_guest.config
make -j
Command to run qemu vm:
qemu-system-x86_64 -m 2G -smp cpus=4 -nographic \
-kernel bzImage-linux58 -append "console=ttyS0 root=/dev/sda" \
-net nic,model=virtio -net bridge,br=virbr0 \
-hda ~/Desktop/nomadinit/nomados.qcow2 --enable-kvm
Nomad is run at boot with config config/init.json
NomadOS can be built from the Nomad Init project. It adds the extlinux bootloader and bare minimal OS into a fully-contained QCOW or VMDK for virtualized or cloud compatible image. It is currently an experimental community project and not supported by HashiCorp. It can be built on a Linux distribution so long as all dependency paths in the build script are present in the environment. Note this is not to be confused with NomadBSD which is an unrelated project. https://nomadbsd.org/