Edit: /snap/lxd/40526/bin/upgrade-bridge (5046B)
#!/bin/sh -e
# Work from the snap
export PATH=/snap/bin/:${PATH}
export LANG=C.UTF-8
# Functions
maskcidr() {
local x=${1##*255.}
set -- 0^^^128^192^224^240^248^252^254^ $(( (${#1} - ${#x})*2 )) ${x%%.*}
x=${1%%$3*}
echo $(( $2 + (${#x}/4) ))
}
# Skip if already converted
if [ ! -e /etc/default/lxd-bridge ]; then
echo "LXD bridge already converted"
exit 0
fi
# Source current configuration
. /etc/default/lxd-bridge
# Setup temporary config dir
export LXD_CONF=$(mktemp -d)
# Check if LXD is functional (chroot detection)
if ! lxc info --force-local >/dev/null 2>&1; then
echo "This system isn't running LXD, assuming stock configuration."
mv /etc/default/lxd-bridge /etc/default/lxd-bridge.upgraded
echo "Cleaning up lxd-bridge state files"
rm -Rf /var/lib/lxd-bridge /run/lxd-bridge "${LXD_CONF}"
exit 0
fi
# Clear deprecated settings
echo "Unsetting deprecated profile options"
lxc profile unset default user.network_mode --force-local || true
lxc profile unset default environment.http_proxy --force-local || true
# Done for unconfigured bridges
if [ "${USE_LXD_BRIDGE}" != "true" ] || [ -z "${LXD_BRIDGE}" ]; then
echo "No bridge configuration to convert"
mv /etc/default/lxd-bridge /etc/default/lxd-bridge.upgraded
echo "Cleaning up lxd-bridge state files"
rm -Rf /var/lib/lxd-bridge /run/lxd-bridge "${LXD_CONF}"
exit 0
fi
# Attempting to kill existing lxd-bridge
echo "Attempting to kill current lxd-bridge"
if [ -e "/run/systemd/system" ] && systemctl -q is-active lxd-bridge; then
systemctl stop lxd-bridge || true
fi
if [ -e "/run/lxd-bridge/network_up" ] && [ -e "/usr/lib/lxd/lxd-bridge" ]; then
/usr/lib/lxd/lxd-bridge stop || true
fi
if [ -e "/run/lxd-bridge/dnsmasq.pid" ]; then
kill -9 "$(cat /run/lxd-bridge/dnsmasq.pid)" >/dev/null 2>&1 || true
fi
# Check if the bridge exists
EXISTING=false
if [ -e "/sys/class/net/${LXD_BRIDGE}" ]; then
EXISTING=true
fi
# Check for stock installation
if [ "${EXISTING}" = "false" ] && [ "$(md5sum /etc/default/lxd-bridge | cut -d' ' -f1)" = "e8cfb4997d9443fe48302bb75326b09f" ]; then
echo "Stock LXD installation detected, resetting to new defaults"
lxc profile device remove default eth0 --force-local >/dev/null 2>&1 || true
mv /etc/default/lxd-bridge /etc/default/lxd-bridge.upgraded
echo "Cleaning up lxd-bridge state files"
rm -Rf /var/lib/lxd-bridge /run/lxd-bridge "${LXD_CONF}"
exit 0
fi
# Bring down and rename an existing bridge
if [ "${EXISTING}" = "true" ]; then
if [ -e "/sys/class/net/lxd-upgrade" ]; then
ip link del lxd-upgrade
fi
echo "Bringing down and renaming existing bridge ${LXD_BRIDGE} to lxd-upgrade"
ip link set "${LXD_BRIDGE}" down
ip link set "${LXD_BRIDGE}" name lxd-upgrade
fi
# Define the bridge in LXD
echo "Creating a new LXD bridge"
if ! lxc network show "${LXD_BRIDGE}" >/dev/null 2>&1; then
lxc network create "${LXD_BRIDGE}" ipv4.address=none ipv6.address=none dns.mode=dynamic --force-local
fi
# Move the old bridge into place
if [ "${EXISTING}" = "true" ]; then
echo "Moving the old bridge into place"
[ -e "/sys/class/net/${LXD_BRIDGE}" ] && ip link del "${LXD_BRIDGE}"
ip link set lxd-upgrade name "${LXD_BRIDGE}" up
fi
# Configure the bridge
echo "Configuring the new LXD bridge"
if [ -n "${LXD_CONFILE}" ] && [ -e "${LXD_CONFILE}" ]; then
echo "Setting dnsmasq conf-file to ${LXD_CONFILE}"
lxc network set "${LXD_BRIDGE}" raw.dnsmasq "conf-file=${LXD_CONFILE}" --force-local
fi
if [ "${LXD_DOMAIN}" != "lxd" ]; then
echo "Setting DNS domain to ${LXD_DOMAIN}"
lxc network set "${LXD_BRIDGE}" dns.domain "${LXD_DOMAIN}" --force-local
fi
if [ -n "${LXD_IPV4_ADDR}" ] && [ -n "${LXD_IPV4_NETMASK}" ]; then
IPV4_CIDR="${LXD_IPV4_ADDR}/$(maskcidr "${LXD_IPV4_NETMASK}")"
echo "Setting IPv4 network to ${IPV4_CIDR}"
lxc network set "${LXD_BRIDGE}" ipv4.address "${IPV4_CIDR}" --force-local
if [ -n "${LXD_IPV4_DHCP_RANGE}" ]; then
IPV4_RANGE=$(echo "${LXD_IPV4_DHCP_RANGE}" | sed "s/,/-/")
echo "Setting IPv4 DHCP range to ${IPV4_RANGE}"
lxc network set "${LXD_BRIDGE}" ipv4.dhcp.ranges "${IPV4_RANGE}" --force-local
fi
if [ "${LXD_IPV4_NAT}" = "true" ]; then
echo "Enabling IPv4 NAT"
lxc network set "${LXD_BRIDGE}" ipv4.nat true --force-local
fi
fi
if [ -e /proc/sys/net/ipv6 ] && [ -n "${LXD_IPV6_ADDR}" ] && [ -n "${LXD_IPV6_MASK}" ]; then
IPV6_CIDR="${LXD_IPV6_ADDR}/${LXD_IPV6_MASK}"
echo "Setting IPv6 network to ${IPV6_CIDR}"
lxc network set "${LXD_BRIDGE}" ipv6.address "${IPV6_CIDR}" --force-local
if [ "${LXD_IPV6_NAT}" = "true" ]; then
echo "Enabling IPv6 NAT"
lxc network set "${LXD_BRIDGE}" ipv6.nat true --force-local
fi
fi
echo "Done converting your bridge, renaming old configuration"
mv /etc/default/lxd-bridge /etc/default/lxd-bridge.upgraded
echo "Cleaning up lxd-bridge state files"
rm -Rf /var/lib/lxd-bridge /run/lxd-bridge "${LXD_CONF}"