ovn-port.sh

usage () {
    cat << EOF
usage: ovn-port COMMAND

These commands need to be run on the host where you plan
to spawn your namespaces.

Commands:
  add-port [--db=tcp:IP:6640] LSWITCH LPORT_NAME IP/MASK GATEWAY
  del-port [--db=tcp:IP:6640] LPORT_NAME
EOF
}

add_port () {

case $1 in
  --db=*)
	DB=`expr X"$1" : 'X[^=]*=\(.*\)'`
        shift
        ;;
esac

LSWITCH=$1
if [ -z "$LSWITCH" ]; then
    echo "No switch name given" >& 2
    exit 1
fi

if [ -n "$DB" ]; then
    exists=`ovn-nbctl --db=$DB get logical_switch $LSWITCH name`
else
    exists=`ovn-nbctl get logical_switch $LSWITCH name`
fi

if [ -z "$exists" ]; then
   echo "$LSWITCH switch does not exist in NB"
   exit 1
fi

LPORT_NAME=$2
if [ -z "$LPORT_NAME" ]; then
    echo "No lport name given" >& 2
    exit 1
fi

IP=$3
if [ -z "$IP" ]; then
    echo "No IP given" >& 2
    exit 1
fi

GATEWAY=$4
if [ -z "$GATEWAY" ]; then
    echo "No GATEWAY given" >& 2
    exit 1
fi

x=`shuf -i 1-99  -n 1`
y=`shuf -i 1-99  -n 1`
z=`shuf -i 1-99  -n 1`

MAC="00:02:03:$x:$y:$z"

if [ -n "$DB" ]; then
    ovn-nbctl --db=$DB lsp-add $LSWITCH $LPORT_NAME
else
    ovn-nbctl lsp-add $LSWITCH $LPORT_NAME
fi

IP_ONLY=`echo $IP | awk -F \/ '{print $1}'`
if [ -n "$DB" ]; then
    ovn-nbctl --db=$DB lsp-set-addresses $LPORT_NAME "$MAC $IP_ONLY"
else
    ovn-nbctl lsp-set-addresses $LPORT_NAME "$MAC $IP_ONLY"
fi

ip netns add $LPORT_NAME
ip link add "${LPORT_NAME}_l" type veth peer name "${LPORT_NAME}_c"

BRIDGE="br-int"
if ovs-vsctl --may-exist add-port "$BRIDGE" "${LPORT_NAME}_l" \
       -- set interface "${LPORT_NAME}_l" \
       external_ids:iface-id="$LPORT_NAME"; then : ; else
        echo >&2 "$UTIL: Failed to add "${LPORT_NAME}_l" port to bridge $BRIDGE"
        ip link delete "${LPORT_NAME}_l"
        exit 1
fi

ip link set "${LPORT_NAME}_l" up
ip link set "${LPORT_NAME}_c" netns "${LPORT_NAME}"
ip netns exec "${LPORT_NAME}" ip link set dev "${LPORT_NAME}_c" name eth0
ip netns exec "${LPORT_NAME}" ip link set eth0 up
ip netns exec "${LPORT_NAME}" ip link set dev eth0 mtu 1440

ip netns exec "${LPORT_NAME}" ip addr add $IP dev eth0
ip netns exec "${LPORT_NAME}"  ip link set dev eth0 address "$MAC"
ip netns exec "${LPORT_NAME}"  ip route add default via "$GATEWAY"


}

del_port () {

case $1 in
  --db=*)
	DB=`expr X"$1" : 'X[^=]*=\(.*\)'`
        shift
        ;;
esac

LPORT_NAME=$1
if [ -z "$LPORT_NAME" ]; then
    echo "No lport name given" >& 2
    exit 1
fi

if [ -n "$DB" ]; then
    ovn-nbctl --db=$DB lport-del $LPORT_NAME
else
    ovn-nbctl lport-del $LPORT_NAME
fi

ip netns delete $LPORT_NAME
ovs-vsctl del-port ${LPORT_NAME}_l
ip link delete ${LPORT_NAME}_l

}

case $1 in
    "add-port")
        shift
        add_port "$@"
        exit 0
        ;;
    "del-port")
        shift
        del_port "$@"
        exit 0
        ;;
    -h | --help)
        usage
        exit 0
        ;;
    *)
        echo >&2 "$UTIL: unknown command \"$1\" (use --help for help)"
        exit 1
        ;;
esac