1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
|
description "lxc network"
author "Serge Hallyn <serge.hallyn@canonical.com>"
start on starting lxc
stop on stopped lxc
env USE_LXC_BRIDGE="false"
env LXC_BRIDGE="lxcbr0"
env LXC_ADDR="10.0.3.1"
env LXC_NETMASK="255.255.255.0"
env LXC_NETWORK="10.0.3.0/24"
env LXC_DHCP_RANGE="10.0.3.2,10.0.3.254"
env LXC_DHCP_MAX="253"
env varrun="/var/run/lxc"
pre-start script
[ -f /etc/default/lxc ] && . /etc/default/lxc
[ "x$USE_LXC_BRIDGE" = "xtrue" ] || { stop; exit 0; }
cleanup() {
# dnsmasq failed to start, clean up the bridge
iptables -t nat -D POSTROUTING -s ${LXC_NETWORK} -j MASQUERADE || true
ifconfig ${LXC_BRIDGE} down || true
brctl delbr ${LXC_BRIDGE} || true
}
if [ -d /sys/class/net/${LXC_BRIDGE} ]; then
if [ ! -f ${varrun}/network_up ]; then
# bridge exists, but we didn't start it
stop;
fi
exit 0;
fi
# set up the lxc network
echo 1 > /proc/sys/net/ipv4/ip_forward
mkdir -p ${varrun}
brctl addbr ${LXC_BRIDGE}
ifconfig ${LXC_BRIDGE} ${LXC_ADDR} netmask ${LXC_NETMASK} up
iptables -t nat -A POSTROUTING -s ${LXC_NETWORK} ! -d ${LXC_NETWORK} -j MASQUERADE
dnsmasq -u lxc-dnsmasq --strict-order --bind-interfaces --pid-file=${varrun}/dnsmasq.pid --conf-file= --listen-address ${LXC_ADDR} --dhcp-range ${LXC_DHCP_RANGE} --dhcp-lease-max=${LXC_DHCP_MAX} --dhcp-no-override --except-interface=lo --interface=${LXC_BRIDGE} || cleanup
touch ${varrun}/network_up
end script
post-stop script
[ -f /etc/default/lxc ] && . /etc/default/lxc
[ -f "${varrun}/network_up" ] || exit 0;
# if $LXC_BRIDGE has attached interfaces, don't shut it down
ls /sys/class/net/${LXC_BRIDGE}/brif/* > /dev/null 2>&1 && exit 0;
if [ -d /sys/class/net/${LXC_BRIDGE} ]; then
ifconfig ${LXC_BRIDGE} down
iptables -t nat -D POSTROUTING -s ${LXC_NETWORK} -j MASQUERADE || true
pid=`cat ${varrun}/dnsmasq.pid 2>/dev/null` && kill -9 $pid || true
rm -f ${varrun}/dnsmasq.pid
brctl delbr ${LXC_BRIDGE}
fi
rm -f ${varrun}/network_up
end script
|