[Pkg-xen-devel] Etch Release / Bond networking

[Joseph]

Hello,

I just setup a Xen server and wanted to use bond0 for my network
connection.

I ended up downloading and addeding the attatched file and making the
following change in /etc/xen/xend-config.sxp.

I added this line: (network-script 'network-bond netdev=bond0')

Would this line be a good one to add to the commented lines and include
the network-bond file in the scripts?

Just thought this might save someone else some trouble.
Perhaps its already fixed in lenny or sid.

Thanks for a great product.

-- 
respectfully,
 -------------------------------------
|                         Joseph | IT |
 -------------------------------------


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#!/bin/bash
#
#
#

# Usage: transfer_addrs src dst
# Copy all IP addresses (including aliases) from device $src to device $dst.
transfer_addrs () {
    local src=$1
    local dst=$2
    # Don't bother if $dst already has IP addresses.
    if ip addr show dev ${dst} | egrep -q '^ *inet ' ; then
        return
    fi
    # Address lines start with 'inet' and have the device in them.
    # Replace 'inet' with 'ip addr add' and change the device name $src
    # to 'dev $src'.
    ip addr show dev ${src} | egrep '^ *inet ' | sed -e "
s/inet/ip addr add/
s@\([0-9]\+\.[0-9]\+\.[0-9]\+\.[0-9]\+/[0-9]\+\)@\1@
s/${src}/dev ${dst}/
" | sh -e
    # Remove automatic routes on destination device
    ip route list | sed -ne "
/dev ${dst}\( \|$\)/ {
  s/^/ip route del /
  p
}" | bash
}

transfer_mac () {
    local src=$1
    local dst=$2
    src_mac=`ip addr show dev $src | egrep '^ *link/ether ' | awk '{print $2}'`
    ip link set $src address fe:ff:ff:ff:ff:ff
    ip link set $dst address $src_mac
}

# Usage: transfer_routes src dst
# Get all IP routes to device $src, delete them, and
# add the same routes to device $dst.
# The original routes have to be deleted, otherwise adding them
# for $dst fails (duplicate routes).
transfer_routes () {
    local src=$1
    local dst=$2
    # List all routes and grep the ones with $src in.
    # Stick 'ip route del' on the front to delete.
    # Change $src to $dst and use 'ip route add' to add.
    ip route list | sed -ne "
/dev ${src}\( \|$\)/ {
  h
  s/^/ip route del /
  P
  g
  s/${src}/${dst}/
  s/^/ip route add /
  P
  d
}" | bash
}



# Usage: create_bridge bridge
create_bridge () {
    local bridge=$1

    # Don't create the bridge if it already exists.
    if ! brctl show | grep -q ${bridge} ; then
        brctl addbr ${bridge}
        brctl stp ${bridge} off
        brctl setfd ${bridge} 0
    fi
    ip link set ${bridge} arp off
    ip link set ${bridge} multicast off
    ip link set ${bridge} up
}

# Usage: add_to_bridge bridge dev
add_to_bridge () {
    local bridge=$1
    local dev=$2
    # Don't add $dev to $bridge if it's already on a bridge.
    if ! brctl show | grep -q ${dev} ; then
        brctl addif ${bridge} ${dev}
    fi
}

# adds $dev to $bridge but waits for $dev to be in running state first
add_to_bridge2() {
    local bridge=$1
    local dev=$2
    local maxtries=10

    echo -n "Waiting for ${dev} to negotiate link."
    for i in `seq ${maxtries}` ; do
        if ifconfig ${dev} | grep -q RUNNING ; then
            break
        else
            echo -n '.'
            sleep 1
        fi
    done

    if [ ${i} -eq ${maxtries} ] ; then echo '(link isnt in running state)' ; fi

    add_to_bridge ${bridge} ${dev}
}

# Usage: show_status dev bridge
# Print ifconfig and routes.
show_status () {
    local dev=$1
    local bridge=$2

    echo '============================================================'
    ip addr show ${dev}
    ip addr show ${bridge}
    echo ' '
    brctl show ${bridge}
    echo ' '
    ip route list
    echo ' '
    route -n
    echo '============================================================'
}

op_start () {
    create_bridge xenbr0
    add_to_bridge xenbr0 vif0.0
    add_to_bridge xenbr0 bond0


    transfer_mac bond0 veth0
    ip link set veth0 up
    ip link set vif0.0 up
    transfer_addrs bond0 veth0
    sleep 3
    transfer_routes bond0 veth0

}

op_stop () {
    transfer_routes veth0 bond0
    transfer_addrs veth0 bond0
    ip link set veth0 down
    ip link set bond0 down
    transfer_mac veth0 bond0
    ip link set vif0.0 down
    ip link set xenbr0 down
    brctl delbr xenbr0
    ip link set bond0 up

}


case "${1}" in
    start)
        op_start
        ;;

    stop)
        op_stop
        ;;

    status)
        show_status ${netdev} ${bridge}
        ;;

    *)
        echo "Unknown command: ${1}" >&2
        echo 'Valid commands are: start, stop, status' >&2
        exit 1
esac
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