ovn-router.sh

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

Commands:
  create-router NAME

  connect-switch ROUTER SWITCH SUBNET
  disconnect-switch ROUTER SWITCH

  connect-router ROUTER1 ROUTER1_SUBNET ROUTER2 ROUTER2_SUBNET
  disconnect-router ROUTER1 ROUTER2
EOF
}

create_router () {
NAME=$1
if [ -z "$NAME" ]; then
    echo "No router name given" >& 2
    exit 1
fi

ovn-nbctl create Logical_Router name=$NAME
}

connect_switch () {
ROUTER_NAME="$1"
SWITCH_NAME="$2"
SUBNET="$3"

if [ -z "$ROUTER_NAME" ] || [ -z "$SWITCH_NAME" ]; then
echo >&2 "router name or switch name not given"
exit 1
fi

if [ -z "$SUBNET" ]; then
echo >&2 "subnet not given"
exit 1
fi

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

LRP_MAC="00:00:00:$x:$y:$z"

lrp_uuid=`ovn-nbctl -- --id=@lrp create Logical_Router_port name=$SWITCH_NAME \
network=$SUBNET mac=\"$LRP_MAC\" -- add Logical_Router $ROUTER_NAME ports @lrp \
-- lsp-add $SWITCH_NAME rp-"$SWITCH_NAME"`

ovn-nbctl set Logical_switch_port rp-"$SWITCH_NAME" \
type=router options:router-port=$SWITCH_NAME addresses=\"$LRP_MAC\"

}

disconnect_switch () {

ROUTER_NAME="$1"
SWITCH_NAME="$2"

if [ -z "$ROUTER_NAME" ] || [ -z "$SWITCH_NAME" ]; then
echo >&2 "router name or switch name not given"
exit 1
fi

lrp1_uuid=`ovn-nbctl --data=bare --no-heading --columns=_uuid find logical_router_port name=$SWITCH_NAME`

if [ -z "$lrp1_uuid" ]; then
echo "no switch with name $SWITCH_NAME connected to $ROUTER_NAME" 
exit 1
fi

ovn-nbctl remove Logical_Router $ROUTER_NAME ports $lrp1_uuid -- destroy logical_router_port $lrp1_uuid
ovn-nbctl lport-del "rp-$SWITCH_NAME"
}

connect_router () {
ROUTER1="$1"
ROUTER1_SUBNET="$2"
ROUTER2="$3"
ROUTER2_SUBNET="$4"

if [ -z "$ROUTER1" ] || [ -z "$ROUTER1_SUBNET" ]; then
echo >&2 "router1 name or subnet not given"
exit 1
fi

if [ -z "$ROUTER2" ] || [ -z "$ROUTER2_SUBNET" ]; then
echo >&2 "router2 name or subnet not given"
exit 1
fi

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

ROUTER1_MAC="00:00:00:$x:$y:$z"

lrp1_uuid=`ovn-nbctl -- --id=@lrp create Logical_Router_port \
name=${ROUTER1}_$ROUTER2 \
network=$ROUTER1_SUBNET mac=\"$ROUTER1_MAC\" -- \
add Logical_Router $ROUTER1 ports @lrp`

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

ROUTER2_MAC="00:00:00:$x:$y:$z"

lrp2_uuid=`ovn-nbctl -- --id=@lrp create Logical_Router_port \
name=${ROUTER2}_$ROUTER1 \
network=$ROUTER2_SUBNET mac=\"$ROUTER2_MAC\" -- \
add Logical_Router $ROUTER2 ports @lrp`

ovn-nbctl set logical_router_port $lrp1_uuid peer=${ROUTER2}_$ROUTER1
ovn-nbctl set logical_router_port $lrp2_uuid peer=${ROUTER1}_$ROUTER2
}

disconnect_router () {
ROUTER1="$1"
ROUTER2="$2"

if [ -z "$ROUTER1" ] || [ -z "$ROUTER2" ]; then
echo >&2 "router1 and router2 name not given"
exit 1
fi

lrp1_uuid=`ovn-nbctl --data=bare --no-heading --columns=_uuid find logical_router_port name=${ROUTER1}_$ROUTER2`
lrp2_uuid=`ovn-nbctl --data=bare --no-heading --columns=_uuid find logical_router_port name=${ROUTER2}_$ROUTER1`

if [ -z "$lrp1_uuid" ] || [ -z $lrp2_uuid ]; then
echo >&2 "failed to fetch uuids of router ports from names"
exit 1
fi

ovn-nbctl remove logical_router "$ROUTER1" ports $lrp1_uuid -- destroy logical_router_port $lrp1_uuid 
ovn-nbctl remove logical_router "$ROUTER2" ports $lrp2_uuid -- destroy logical_router_port $lrp2_uuid

}


case $1 in
    "create-router")
        shift
        create_router "$@"
        exit 0
        ;;
    "connect-switch")
        shift
        connect_switch "$@"
        exit 0
        ;;
    "disconnect-switch")
        shift
        disconnect_switch "$@"
        exit 0
        ;;
    "connect-router")
        shift
        connect_router "$@"
        exit 0
        ;;
    "disconnect-router")
        shift
        disconnect_router "$@"
        exit 0
        ;;
    -h | --help)
        usage
        exit 0
        ;;
    *)
        echo >&2 "$UTIL: unknown command \"$1\" (use --help for help)"
        exit 1
        ;;
esac