gce.conf

#!/bin/sh
#
#

# The default of 3GB is too small for GCE, so override the size here.
export VMSIZE=20g

# Set to a list of packages to install.
export VM_EXTRA_PACKAGES="${VM_EXTRA_PACKAGES} firstboot-freebsd-update \
	firstboot-pkgs google-cloud-sdk panicmail sudo \
	sysutils/py-google-compute-engine lang/python \
	lang/python3"

# Set to a list of third-party software to enable in rc.conf(5).
export VM_RC_LIST="ntpd sshd growfs \
	firstboot_pkgs firstboot_freebsd_update google_startup \
	google_accounts_daemon google_clock_skew_daemon \
	google_instance_setup google_network_daemon"

vm_extra_install_base() {
	echo 'search google.internal' > ${DESTDIR}/etc/resolv.conf
	echo 'nameserver 169.254.169.254' >> ${DESTDIR}/etc/resolv.conf
	echo 'nameserver 8.8.8.8' >> ${DESTDIR}/etc/resolv.conf
}

vm_extra_pre_umount() {
	local DEVFSISOURS

	# Enable growfs on every boot, not only the first, as as instance's disk can
	# be enlarged post-creation
	sed -i -e '/KEYWORD: firstboot/d' /etc/rc.d/growfs

	cat << EOF >> ${DESTDIR}/etc/rc.conf
dumpdev="AUTO"
ifconfig_DEFAULT="SYNCDHCP mtu 1460"
ntpd_sync_on_start="YES"
# need to fill in something here
#firstboot_pkgs_list=""
panicmail_autosubmit="YES"
EOF

	cat << EOF >> ${DESTDIR}/boot/loader.conf
autoboot_delay="-1"
beastie_disable="YES"
loader_logo="none"
hw.memtest.tests="0"
console="comconsole,vidconsole"
hw.vtnet.mq_disable=1
kern.timecounter.hardware=ACPI-safe
aesni_load="YES"
nvme_load="YES"
EOF

	echo '169.254.169.254 metadata.google.internal metadata' >> \
		${DESTDIR}/etc/hosts

        # overwrite ntp.conf
	cat << EOF > ${DESTDIR}/etc/ntp.conf
server metadata.google.internal iburst

restrict default kod nomodify notrap nopeer noquery
restrict -6 default kod nomodify notrap nopeer noquery

restrict 127.0.0.1
restrict -6 ::1
restrict 127.127.1.0
EOF

	cat << EOF >> ${DESTDIR}/etc/syslog.conf
*.err;kern.warning;auth.notice;mail.crit                /dev/console
EOF

	cat << EOF >> ${DESTDIR}/etc/ssh/sshd_config
KbdInteractiveAuthentication no
X11Forwarding no
AcceptEnv LANG
AllowAgentForwarding no
ClientAliveInterval 420
EOF

	cat << EOF >> ${DESTDIR}/etc/crontab
0       3       *       *       *       root    /usr/sbin/freebsd-update cron
EOF

	cat << EOF >> ${DESTDIR}/etc/sysctl.conf
net.inet.icmp.drop_redirect=1
net.inet.ip.redirect=0
kern.ipc.soacceptqueue=1024
debug.trace_on_panic=1
debug.debugger_on_panic=0
EOF

	# To meet GCE marketplace requirements, extract the src.txz and
	# ports.txz distributions to the target virtual machine disk image
	# and fetch the sources for the third-party software installed on
	# the image.
	if [ ! -c "${DESTDIR}/dev/null" ]; then
		DEVFSISOURS=1
		mkdir -p ${DESTDIR}/dev
		mount -t devfs devfs ${DESTDIR}/dev
	fi
	if [ -e "${DESTDIR}/../ftp/src.txz" ]; then
		tar fxJ ${DESTDIR}/../ftp/src.txz -C ${DESTDIR}
	fi
	if [ -e "${DESTDIR}/../ftp/ports.txz" ]; then
		tar fxJ ${DESTDIR}/../ftp/ports.txz -C ${DESTDIR}
		_INSTALLED_PACKAGES=$(chroot ${DESTDIR} pkg info -o -q -a)
		for PACKAGE in ${_INSTALLED_PACKAGES}; do
			chroot ${DESTDIR} \
				make -C /usr/ports/${PACKAGE} fetch
		done
	fi
	if [ "$DEVFSISOURS" = "1" ]; then
		umount_loop ${DESTDIR}/dev
	fi

	## XXX: Verify this is needed.  I do not see this requirement
	## in the docs, and it impairs the ability to boot-test a copy
	## of the image prior to packaging for upload to GCE.
	#sed -E -i '' 's/^([^#].*[[:space:]])on/\1off/' ${DESTDIR}/etc/ttys

	touch ${DESTDIR}/firstboot

	return 0
}

# Do everything except deleting resolv.conf since we construct our own
# Googlized resolv.conf file in vm_extra_install_base.
vm_emulation_cleanup() {
	if [ -n "${QEMUSTATIC}" ]; then
		rm -f ${DESTDIR}/${EMULATOR}
	fi
	umount_loop ${DESTDIR}/dev
	return 0
}