Hi
I wrote a vif script to support openvswitch. I use it on some of my
machines, so it works for non-qemu domains.
Ian asked me to send it here, maybe someone wants to take a look.
Bastian
#!/bin/bash
#===========================================================================#
${XEN_SCRIPT_DIR}/vif-openvswitch
#
# Script for configuring a vif in openvswitch mode.
# The hotplugging system will call this script if it is specified either in
# the device configuration given to Xend, or the default Xend configuration
# in ${XEN_CONFIG_DIR}/xend-config.sxp. If the script is specified in
# neither of those places, then this script is the default.
#
# Usage:
# vif-openvswitch (add|remove|online|offline)
#
# Environment vars:
# vif vif interface name (required).
# XENBUS_PATH path to this device''s details in the XenStore (required).
#
# Read from the store:
# bridge openvswitch to add the vif to (required).
# ip list of IP networks for the vif, space-separated (optional).
#
# up:
# Enslaves the vif interface to the bridge and adds iptables rules
# for its ip addresses (if any).
#
# down:
# Removes the vif interface from the bridge and removes the iptables
# rules for its ip addresses (if any).
#===========================================================================
dir=$(dirname "$0")
. "$dir/vif-common.sh"
openvswitch_external_id() {
local dev=$1
local key=$2
local value=$3
echo "-- set interface $dev
external-ids:\"$key\"=\"$value\""
}
openvswitch_external_id_all() {
local dev=$1
local frontend_id=$(xenstore_read "$XENBUS_PATH/frontend-id")
local vm_path=$(xenstore_read "/local/domain/${frontend_id}/vm")
local name=$(xenstore_read "${vm_path}/name")
openvswitch_external_id $dev "xen-vm-name" "$name"
local uuid=$(xenstore_read "${vm_path}/uuid")
openvswitch_external_id $dev "xen-vm-uuid" "$uuid"
local mac=$(xenstore_read "$XENBUS_PATH/mac")
openvswitch_external_id $dev "attached-mac" "$mac"
}
add_to_openvswitch () {
local dev=$1
local bridge="$(xenstore_read_default "$XENBUS_PATH/bridge"
"$bridge")"
local tag trunk
if [[ $bridge =~
^([^.:]+)(\.([[:digit:]]+))?(:([[:digit:]]+(:[[:digit:]]+)*))?$ ]]; then
bridge="${BASH_REMATCH[1]}"
tag="${BASH_REMATCH[3]}"
trunk="${BASH_REMATCH[5]//:/,}"
else
fatal "No valid brdige was specified"
fi
if [ $trunk ]; then
local trunk_arg="trunk=$trunk"
fi
if [ $tag ]; then
local tag_arg="tag=$tag"
fi
local vif_details="$(openvswitch_external_id_all $dev)"
ovs-vsctl --timeout=30 -- --if-exists del-port $dev -- add-port
"$bridge" $dev $tag_arg $trunk_arg $vif_details
ip link set $dev up
}
case "$command" in
add|online)
setup_virtual_bridge_port $dev
add_to_openvswitch $dev
;;
offline)
ovs-vsctl --timeout=30 -- --if-exists del-port $dev
;;
esac
if [ "$type_if" = vif ]; then
handle_iptable
fi
log debug "Successful vif-openvswitch $command for $dev."
if [ "$type_if" = vif -a "$command" = "online" ];
then
success
fi
--
Is truth not truth for all?
-- Natira, "For the World is Hollow and I have Touched
the Sky", stardate 5476.4.
