Add buildpxe.sh framework

Adds a script to set up a PXE image directory for the PVC installer.
Provides an alternative to the ISO for automating deploys in a
controlled, PXE-based environment.
This commit is contained in:
Joshua Boniface 2021-12-04 02:20:43 -05:00
parent f858d03ff9
commit 252c543304
1 changed files with 135 additions and 0 deletions

135
buildpxe.sh Executable file
View File

@ -0,0 +1,135 @@
#!/usr/bin/env bash
# Generate a PVC autoinstaller PXE configuration
fail() {
echo "$@"
exit 1
}
test -f /usr/lib/PXELINUX/pxelinux.0 &>/dev/null || fail "This script requires pxelinux and syslinux-common"
test -f /usr/lib/syslinux/modules/bios/ldlinux.c32 &>/dev/null || fail "This script requires pxelinux and syslinux-common"
sudo -n true &>/dev/null || fail "The user running this script must have sudo privileges."
outputdir="pvc-installer-pxe_$(date +%Y-%m-%d)/"
deployusername="deploy"
show_help() {
echo -e "PVC install PXE generator"
echo
echo -e " Generates a mostly-automated installer PXE image for a PVC node base system."
echo -e " This setup is designed to be used with the pvcbootstrapd system; for a normal"
echo -e " installation, use buildiso.sh instead."
echo
echo -e "Usage: $0 [-h] [-o <outputdirectory>] [-u username]"
echo
echo -e " -h: Display this help message."
echo -e " -o: Create the PXE images under <outputdirectory> instead of the default."
echo -e " -u: Change 'deploy' user to a new username."
echo -e " -a: Preserve live-build artifacts (passed through to buildiso.sh)."
echo -e " -k: Preserve live-build config (passed through to buildiso.sh)."
echo -e " -i: Preserve live-build ISO image."
}
while getopts "h?o:u:aki" opt; do
case "$opt" in
h|\?)
show_help
exit 0
;;
o)
outputdir="$OPTARG"
;;
u)
deployusername=$OPTARG
;;
a)
preserve_artifacts='-a'
;;
k)
preserve_livebuild='-l'
;;
i)
preserve_liveiso='y'
;;
esac
done
cleanup() {
echo -n "Cleaning up... "
echo "done."
echo
}
fail() {
echo $@
cleanup
exit 1
}
build_iso() {
if [[ ! -f pvc-installer_pxe-tmp.iso ]]; then
./buildiso.sh \
-o pvc-installer_pxe-tmp.iso \
-u ${deployusername} \
${preserve_artifacts} \
${preserve_livebuild}
fi
}
build_pxe() {
mkdir -p ${outputdir} ${outputdir}/boot
echo -n "Mounting temporary ISO file... "
tmpdir=$( mktemp -d )
sudo mount pvc-installer_pxe-tmp.iso ${tmpdir} &>/dev/null
echo "done."
echo -n "Copying live boot files... "
cp ${tmpdir}/live/filesystem.squashfs ${outputdir}/
cp ${tmpdir}/live/vmlinuz ${outputdir}/
cp ${tmpdir}/live/initrd.img ${outputdir}/
echo "done."
echo -n "Unmounting and removing temporary ISO file... "
sudo umount ${tmpdir}
rmdir ${tmpdir}
echo "done."
echo -n "Creating base iPXE configuration... "
cat <<EOF > ${outputdir}/boot.pxe
#!ipxe
# Set global variables
set root-url tftp://\${next-server}
set host-url tftp://\${next-server}/host
# Load host/mac-*.ipxe if present (per-host host-args configuration)
chain --autofree \${host-url}/mac-\${mac:hexraw}.ipxe ||
set menu-default pvc-installer
set submenu-default pvc-installer
:pvc-installer
kernel \${root-url}/vmlinuz
initrd \${root-url}/initrd.img
imgargs vmlinuz console=tty0 console=ttyS0,115200n8 boot=live components timezone=America/Toronto fetch=\${root-url}/filesystem.squashfs username=root \${host-args}
boot
EOF
echo "done."
sudo chown -R $(whoami) ${outputdir}
sudo chmod -R u+w ${outputdir}
if [[ -z ${preserve_liveiso} ]]; then
echo -n "Removing temporary ISO... "
rm pvc-installer_pxe-tmp.iso &>/dev/null
echo "done."
fi
}
build_iso
build_pxe
cleanup
echo "PVC Live Installer PXE generation complete."