1 files changed, 133 insertions, 0 deletions
diff --git a/charms/trusty/neutron-contrail/scripts/create-vrouter.sh b/charms/trusty/neutron-contrail/scripts/create-vrouter.sh
new file mode 100755
index 0000000..686a7b7
--- /dev/null
+++ b/charms/trusty/neutron-contrail/scripts/create-vrouter.sh
@@ -0,0 +1,133 @@
+#!/bin/sh -e
+#
+# Script used to configure vRouter interface
+
+configVRouter()
+{
+	cat juju-header
+	echo "auto $1"
+	if [ -e "$2" ]; then
+		cat "$2"
+	else
+		echo "iface $1 inet manual"
+	fi
+	printf "\n%s\n"	"auto vhost0"
+	if [ -e "$3" ]; then
+		cat "$3"
+	else
+		echo "iface vhost0 inet dhcp"
+	fi
+	cat <<-EOF
+		    pre-up ip link add address \$(cat /sys/class/net/$1/address) type vhost
+		    pre-up vif --add $1 --mac \$(cat /sys/class/net/$1/address) --vrf 0 --vhost-phys --type physical
+		    pre-up vif --add vhost0 --mac \$(cat /sys/class/net/$1/address) --vrf 0 --type vhost --xconnect $1
+		    post-down vif --list | awk '/^vif.*OS: vhost0/ {split(\$1, arr, "\\/"); print arr[2];}' | xargs vif --delete
+		    post-down vif --list | awk '/^vif.*OS: $1/ {split(\$1, arr, "\\/"); print arr[2];}' | xargs vif --delete
+		    post-down ip link delete vhost0
+		EOF
+}
+
+ifacedown()
+{
+	for iface; do
+		# ifdown interface
+		# if bridge, save list of interfaces
+		# if bond, save list of slaves
+		if [ ! -e /sys/class/net/$iface ]; then
+			continue
+		fi
+		[ -d /sys/class/net/$iface/bridge ] && saveIfaces $iface
+		[ -d /sys/class/net/$iface/bonding ] && saveSlaves $iface
+		ifdown --force $iface
+	done
+}
+
+ifaceup()
+{
+	for iface; do
+		# ifup interface
+		# if bridge, restore list of interfaces
+		# restore list of slaves if exists (bond)
+		restoreSlaves $iface
+		ifup $iface
+		[ -d /sys/class/net/$iface/bridge ] && restoreIfaces $iface
+	done
+	return 0
+}
+
+restoreIfaces()
+{
+	if [ -e $TMP/$1.ifaces ]; then
+		cat $TMP/$1.ifaces | xargs -n 1 brctl addif $1 || true
+	fi
+}
+
+restoreSlaves()
+{
+	if [ -e $TMP/$1.slaves ]; then
+		cat $TMP/$1.slaves | xargs ifup
+	fi
+}
+
+saveIfaces()
+{
+	if [ -z "$(find /sys/class/net/$1/brif -maxdepth 0 -empty)" ]; then
+		find /sys/class/net/$1/brif | tail -n +2 | xargs -n 1 basename \
+		    > $TMP/$1.ifaces
+	fi
+}
+
+saveSlaves()
+{
+	if [ -s /sys/class/net/$1/bonding/slaves ]; then
+		cat /sys/class/net/$1/bonding/slaves | tr " " "\n" \
+		    > $TMP/$1.slaves
+	fi
+}
+
+TMP=$(mktemp -d /tmp/create-vrouter.XXX)
+
+if [ $# -ne 0 ]; then
+	interface=$1
+else
+	# use default gateway interface
+	interface=$(route -n | awk '$1 == "0.0.0.0" { print $8 }')
+fi
+
+ifacedown $interface vhost0; sleep 5
+# add interfaces.d source line to /etc/network/interfaces
+if ! grep -q '^[[:blank:]]*source /etc/network/interfaces\.d/\*\.cfg[[:blank:]]*$' \
+    /etc/network/interfaces; then
+	printf "\n%s\n" "source /etc/network/interfaces.d/*.cfg" \
+	    >> /etc/network/interfaces
+	# it's possible for conflicting network config to exist in
+	# /etc/network/interfaces.d when we start sourcing it
+	# so disable any config as a precautionary measure
+	for cfg in /etc/network/interfaces.d/*.cfg; do
+		[ -e "$cfg" ] || continue
+		mv "$cfg" "$cfg.save"
+	done
+fi
+mkdir -p /etc/network/interfaces.d
+for cfg in /etc/network/interfaces /etc/network/interfaces.d/*.cfg \
+    /etc/network/*.config; do
+	# for each network interfaces config, extract the config for
+	# the chosen interface whilst commenting it out in the subsequent
+	# replacement config
+	[ -e "$cfg" ] || continue
+	awk -v interface=$interface -v interface_cfg=$TMP/interface.cfg \
+	    -v vrouter_cfg=$TMP/vrouter.cfg -f vrouter-interfaces.awk "$cfg" \
+	    > $TMP/interfaces.cfg
+	if ! diff $TMP/interfaces.cfg "$cfg" > /dev/null; then
+		# create backup
+		mv "$cfg" "$cfg.save"
+		# substitute replacement config for original config
+		cat juju-header $TMP/interfaces.cfg > "$cfg"
+	fi
+done
+# use extracted interface config to create new vrouter config
+configVRouter $interface $TMP/interface.cfg $TMP/vrouter.cfg \
+    > /etc/network/interfaces.d/vrouter.cfg
+ifaceup $interface vhost0
+
+rm -rf $TMP