75 lines
2.2 KiB
Bash
Executable File
75 lines
2.2 KiB
Bash
Executable File
#!/bin/bash
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set -eu -o pipefail
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VERBOSE=${VERBOSE:-True}
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if [[ "$VERBOSE" == True ]]; then
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set -x
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guestfish_args="--verbose"
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fi
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CIRROS_VERSION=${CIRROS_VERSION:-0.6.1}
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CIRROS_ARCH=${CIRROS_ARCH:-x86_64}
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# TODO(dtantsur): use the image cached on infra images in the CI
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DISK_URL=http://download.cirros-cloud.net/${CIRROS_VERSION}/cirros-${CIRROS_VERSION}-${CIRROS_ARCH}-disk.img
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OUT=$(realpath ${1:-rootfs.img})
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IRONIC_TTY_DEV=${IRONIC_TTY_DEV:-ttyS0,115200}
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# rdroot : boot from the ramdisk present on the root partition instead of
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# mounting the root partition.
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# dslist : disable Nova metadata support, it takes a long time on boot.
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KARGS=${KARGS:-nofb vga=normal console=${IRONIC_TTY_DEV} rdroot dslist=configdrive}
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workdir=$(mktemp -d)
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root_mp=$workdir/root
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efi_mp=$workdir/efi
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dest=$workdir/dest
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cd $workdir
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curl -Lf -o disk.qcow2 $DISK_URL
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qemu-img convert -O raw disk.qcow2 disk.img
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rm disk.qcow2
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# kpartx automatically allocates loop devices for all partitions in the image
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device=$(sudo kpartx -av disk.img | grep -oE 'loop[0-9]+p' | head -1)
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function clean_up {
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set +e
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sudo umount $efi_mp
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sudo umount $root_mp
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sudo kpartx -d $workdir/disk.img
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sudo rm -rf $workdir
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}
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trap clean_up EXIT
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# TODO(dtantsur): some logic instead of hardcoding numbers 1 and 15?
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rootdev=/dev/mapper/${device}1
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efidev=/dev/mapper/${device}15
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mkdir -p $root_mp $efi_mp $dest/boot/efi
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sudo mount $rootdev $root_mp
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sudo mount $efidev $efi_mp
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sudo cp -aR $root_mp/* $dest/
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sudo cp -aR $efi_mp/EFI $dest/boot/efi/
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# Extract all of the stuffs from the disk image and write it out into
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# the dest folder. This is *normally* done on startup for Cirros, but
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# doesn't quite jive with the expected partition image model.
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sudo zcat $root_mp/boot/initrd.img* | sudo cpio -i --make-directories -D $dest
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# These locations are required by IPA even when it does not really run
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# grub-install.
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sudo mkdir -p $dest/{dev,proc,run,sys}
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# The default arguments don't work for us, update grub configuration.
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sudo sed -i "/^ *linux /s/\$/ $KARGS/" $dest/boot/efi/EFI/ubuntu/grub.cfg
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LIBGUESTFS_BACKEND=direct sudo -E \
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virt-make-fs --size +50M --type ext3 --label cirros-rootfs \
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${guestfish_args:-} "$dest" "$OUT"
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sudo chown $USER "$OUT"
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qemu-img info "$OUT"
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