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network-multinet
172
network-multinet
@@ -1,22 +1,22 @@
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#!/bin/sh
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#============================================================================
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# network-multi_net
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# network-multinet
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#
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# Version = 1.1.2
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# Date = 2007-07-11
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# Version = 1.3.1
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# Date = 2007-08-29
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#
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# Maintainer(s) = Ron Terry - ron (at) pronetworkconsulting (dot) com
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#
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# The latest version can be found at:
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#
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# http://pronetworkconsulting.com/linux/scripts/network-multi_net.html
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# http://pronetworkconsulting.com/linux/scripts/network-multinet.html
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#
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# Description:
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#
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# Replacement for the xen network-bridge, network-nat and network-route
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# scripts. This script allows for the creation of multiple bridges.
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#
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# This script can create 3 types of bridges:
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# This script can create 4 types of bridges:
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#
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# traditional bridges: -Bridges that contain both a physical network
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# device (ethX) and a virtual network device (vethX)
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@@ -55,6 +55,13 @@
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# -These can be used to allow VMs in DomUs to
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# communicate only with other DomUs and not Dom0.
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#
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# nohost bridges: -Bridges that contain a physical network device
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# but not a virtual network device from Dom0.
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# -These can be used to allow virtual machines to
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# communicate with the outside world but not with
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# Dom0. (Usefull if you want to isolate traffic
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# away from Dom0)
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#
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# This script accepts the (start|stop|restart|status) parameters.
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#
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# This script depends on an unmodified version of the network-bridge script
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@@ -96,21 +103,26 @@
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# is configured as a NAT network and the second host bridge (on veth3)
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# is configured as a hostonly network.
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#
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# Edit the NOHOST_BRIDGE_LIST variable to define which bridges you would
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# like to be connected to the outside world but not Dom0. These are
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# usefull if you want to allow VMs to access the outside world but you
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# want to isolate traffic away from Dom0.
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#
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# Edit the EMPTY_BRIDGE_LIST variable to define which empty bridges to
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# create. This list should contain the numbers of the bridges to
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# create (4 5 6 7)
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#
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# To enable this script edit the network-script field in the
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# /etc/xen/xen-config.sxp file.
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# /etc/xen/xend-config.sxp file.
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#
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# Example: (network-script network-multi_net)
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# Example: (network-script network-multinet)
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#
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# Depends on: /etc/xen/scripts/xen-network-common.sh
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# /etc/xen/scripts/network-bridge
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#
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# Config file: /etc/sysconfig/xend
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# Config file: /etc/sysconfig/xendconfig
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#
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# Usage: network-multi_net (start|stop|restart|status)
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# Usage: network-multinet (start|stop|restart|status)
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#
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# Vars:
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#
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@@ -123,11 +135,20 @@
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# LOCAL_BRIDGE_LIST -Space delimited list of virtual network devices to
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# create local bridges on using the following format:
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#
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# <virtual network device>,<mac address>,<IP address/CIDR NetMask>,<nat|hostonly|routed>
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# <virtual network device>,<mac address>,<IP address/CIDR NetMask>,<nat|hostonly|routed>,<dhcp-on|dhcp-off>
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#
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# Example with 2 virtual devices:
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#
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# "veth2,00:16:3E:01:00:02,172.22.0.1/16,nat veth3,00:16:3E:01:00:03,172.23.0.1/16,hostonly"
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# "veth2,00:16:3E:01:00:02,172.22.0.1/16,nat,dhcp-on veth3,00:16:3E:01:00:03,172.23.0.1/16,hostonly,dhcp-off"
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#
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# NOHOST_BRIDGE_LIST -Space delimited list of bridge numbers/NICs to create
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# "no-host" bridges on.
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#
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# <bridge number>,<physical network device>
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#
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# Example with 2 devices:
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#
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# "4,eth1 5.eth2"
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#
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# EMPTY_BRIDGE_LIST -Space delimited list of bridge numbers to create as
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# empty bridges.
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@@ -148,8 +169,10 @@
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. /etc/sysconfig/xend
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SCRIPT_PATH="/etc/xen/scripts"
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CONF_FILE_PATH="/etc/xen/conf"
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NETWORK_SAVE_PATH="/var/lib/xend/network_save"
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IPTABLES_SAVE_FILE="$NETWORK_SAVE_PATH/iptables-save"
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XEN_DHCP_SCRIPT="$SCRIPT_PATH/xen-dhcpd"
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#### Script Functions #####################################################
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@@ -171,12 +194,17 @@ get_option() {
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esac
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}
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make_save_dir() {
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make_config_dirs() {
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# Create temporary storage directory if needed.
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if ! [ -d "$NETWORK_SAVE_PATH" ]
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then
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mkdir $NETWORK_SAVE_PATH
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fi
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if ! [ -d $CONF_FILE_PATH ]
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then
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mkdir $CONF_FILE_PATH
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fi
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}
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manage_routing() {
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@@ -385,6 +413,7 @@ setup_host_interface() {
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# bring it back up
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ip link set $DEV up
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ip link set $DEV arp on
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;;
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stop)
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# take the interface down
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@@ -580,6 +609,89 @@ create_local_bridges() {
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done
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}
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create_nohost_bridges() {
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# Creates bridges attached to an external interface but no devices in Dom0.
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#
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# This function reads the start,stop,status parameter from the $CMD_OPT
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# variable and responds respectively.
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echo ""
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echo "============================================================"
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for BRIDGE in $NOHOST_BRIDGE_LIST
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do
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local DEV=`echo $BRIDGE|cut -d "," -f 1`
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local PDEV=p$DEV
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local MAC=`ip link show ${i} | grep 'link\/ether' | sed -e 's/.*ether \(..:..:..:..:..:..\).*/\1/'`
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local BRIDGE_NUM=`echo $BRIDGE|cut -d "," -f 2`
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local BR_NAME=$BRIDGE_NAME$BRIDGE_NUM
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case $CMD_OPT in
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start)
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if ! brctl show | grep -qw "^$BR_NAME"
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then
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echo ""
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echo "============================================================"
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echo "Configuring Virtual No-Host Bridge: $BR_NAME"
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echo ""
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echo " using- Virtual Device: $DEV"
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# create the bridge
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create_bridge $BR_NAME
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# back up the interface's info (MAC, etc)
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echo $MAC > $NETWORK_SAVE_PATH/$DEV-info
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# configure the interface as a bridge port
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setup_bridge_port $DEV
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# rename the physical interface
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ip link set $DEV name $PDEV
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# add the interface to the bridge
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add_to_bridge $BR_NAME $PDEV
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fi
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;;
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stop)
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if brctl show | grep -qw "^$BR_NAME"
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then
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echo "============================================================"
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echo "Removing Virtual No-Host Bridge: $BR_NAME"
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echo ""
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# bring the bridge down
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ip link set $BR_NAME down
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# remove the interface from the bridge
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brctl delif $BR_NAME $PDEV
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# remove the bridge
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brctl delbr $BR_NAME
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# bring the interface down
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ip link set down $PDEV
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# reset the interface back to normal
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ip link set $PDEV arp on
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ip link set $PDEV multicast on
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# reset the interface back to its original name and MAC
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ip link set $PDEV name $DEV
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ip link set $DEV addr `cat $NETWORK_SAVE_PATH/$DEV-info`
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rm -f `cat $NETWORK_SAVE_PATH/$DEV-info`
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# bring the interface back up
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ifup $DEV
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fi
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;;
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status)
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brctl show $BR_NAME | grep -w "^$BR_NAME"
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;;
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esac
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done
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echo "============================================================"
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}
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create_empty_bridges() {
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# Creates bridges attached to no devices in Dom0.
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#
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@@ -625,12 +737,13 @@ start_xend_network() {
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echo "%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%"
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echo " Starting the xend network environment"
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echo "%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%"
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make_save_dir
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make_config_dirs
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manage_susefirewall2 || manage_iptables
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create_traditional_bridges
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manage_routing
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create_local_bridges
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create_empty_bridges
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create_nohost_bridges
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}
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stop_xend_network() {
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@@ -641,6 +754,7 @@ stop_xend_network() {
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create_traditional_bridges
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create_local_bridges
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create_empty_bridges
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create_nohost_bridges
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manage_routing
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manage_susefirewall2 || manage_iptables
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}
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@@ -649,28 +763,58 @@ show_xend_network_status() {
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create_traditional_bridges
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create_local_bridges
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create_empty_bridges
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create_nohost_bridges
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}
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#### Maid Code Body #######################################################
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#### Main Code Body #######################################################
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get_option "$1"
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case $CMD_OPT in
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start)
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# Start the Xen network
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start_xend_network
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# Start the DHCP server if it exists
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if [ -e $XEN_DHCP_SCRIPT ]
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then
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$XEN_DHCP_SCRIPT start
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fi
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;;
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stop)
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# Stop the DHCP server if it exists
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if [ -e $XEN_DHCP_SCRIPT ]
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then
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$XEN_DHCP_SCRIPT stop
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fi
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# Stop the Xen network
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stop_xend_network
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;;
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restart)
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# Stop the DHCP server if it exists
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if [ -e $XEN_DHCP_SCRIPT ]
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then
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$XEN_DHCP_SCRIPT stop
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fi
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# Stop the Xen network
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CMD_OPT="stop"
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stop_xend_network
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# Start the Xen network
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CMD_OPT="start"
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start_xend_network
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# Start the DHCP server if it exists
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if [ -e $XEN_DHCP_SCRIPT ]
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then
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$XEN_DHCP_SCRIPT start
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fi
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;;
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status)
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show_xend_network_status
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$XEN_DHCP_SCRIPT status
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;;
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esac
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