Docker files to build custom Cirros image
docker build -t docker-cirros-builder .
docker run --privileged -i -v /tmp/cirros_img/:/root/cirros/output/x86_64/images/ -t docker-cirros-builder
mv /tmp/cirros_img/disk.img /tmp/cirros_img/cirros-thttpd.img
- The container takes about 4GB of disk space