写个脚本列出neutron的ovs的topology。

运行结果如下：

$ ./nova-ifinfo a7026868-407c-4c54-bb8f-a68623d7e13f
vm name is: instance-00000035 # 查找VM的名字
qemu pid is: 43146, iface host fd: 28, iface fd: 26, iface MAC: fa:16:3e:3f:ae:50

# 查找VM的tap设备的fd，通过fd找到对应的bridge。
************************************************
VM:instance-00000035 ---> tap: tap4ab104d3-5f ---> bridge: qbr4ab104d3-5f
************************************************
# 遍历VM的bridge。
************************************************
bridge: qbr4ab104d3-5f
           |__ qvb4ab104d3-5f
           |__ tap4ab104d3-5f
************************************************
# 找到VM的bridge的veth设备，通过veth设备，找到对端接在哪个bridge上。
************************************************
bridge: qbr4ab104d3-5f                                  bridge: br-int
           |__ veth: qvb4ab104d3-5f <----> veth: qvo4ab104d3-5f __|
************************************************
# 接续查找该bridge接到了哪里。
************************************************
bridge: br-int                                   bridge: br-tun
           |__ veth: patch-tun <----> veth: patch-int __|

bridge: br-int bridge: br-ex
|__ veth: int-br-ex <----> veth: phy-br-ex __|

************************************************

内容如下：

$ cat nova-ifinfo

精简版

 #!/bin/bash

 ST=`nova hypervisor-servers $HOSTNAME | grep $`

 if [[ $? !=  ]] ; then

     echo "not find $1 on $HOSTNAME"

     nova hypervisor-servers $HOSTNAME

     exit

 fi

 ST=`nova show $`

 if [[ $? !=  ]] ; then

     nova list

     exit

 fi

 QEMU_NAME=`nova show $ |grep "OS-EXT-SRV-ATTR:instance_name" | awk '{print $4}'`

 if [[ $? !=  ]] ; then

     exit

 fi

 ST=`sudo virsh domstate $`

 if [[ $? !=  ]] ; then

     exit

 fi

 if [[ "$ST" =~ "shut off" ]] ; then

     sudo virsh list --all

     echo "$QEMU_NAME is shut off"

     exit

 fi

 echo "vm name is: $QEMU_NAME"

 QEMU_CMD=`ps -ef |grep " $QEMU_NAME " |grep -v grep`

 # echo $QEMU_CMD

 QEMU_PID=`cut -d " " -f2 <<< $QEMU_CMD`

 CMD_IFS=""

 IF_FD=""

 HOST_FD=""

 [[ "$QEMU_CMD" =~ "-netdev" ]] && CMD_IFS=${QEMU_CMD#*-netdev}

 [[ "$QEMU_CMD" =~ "tap,fd=" ]] && CMD_IFS=${CMD_IFS#*tap,fd=} && IF_FD=${CMD_IFS%%,*}

 [[ "$QEMU_CMD" =~ "vhostfd=" ]] && CMD_IFS=${CMD_IFS#*vhostfd=} && HOST_FD=${CMD_IFS%% *}

 [[ "$QEMU_CMD" =~ "mac=" ]] && CMD_MAC=${QEMU_CMD#*mac=} && CMD_MAC=${CMD_MAC%%,*}

 echo "qemu pid is: $QEMU_PID, iface host fd: $HOST_FD, iface fd: $IF_FD, iface MAC: $CMD_MAC"

 # egrep -l iff:.*tap* /proc/*/fdinfo/* 2>/dev/null|cut -d/ -f3

 TAPNAME=`sudo cat /proc/$QEMU_PID/fdinfo/$IF_FD | grep "iff:.*tap*"`

 TAPNAME=${TAPNAME#iff:[[:space:]]*}

 # TAPNAME="${TAPNAME##[[:space:]]}"

 # TAPNAME="${TAPNAME//[[:space:]]/}"

 # kernel version less than 3.14

 if [[ -z $TAPNAME ]];  then

 TAPNAME=`ifconfig |grep ${CMD_MAC:2}`

 TAPNAME="${TAPNAME%%[[:space:]]*}"

 fi

 BR=`ls -l /sys/class/net/$TAPNAME/brport/bridge`

 BR=${BR##*/}

 # BR=""

 # for br in `ls /sys/class/net/`; do

 #     if [[ -d "/sys/class/net/$br/bridge"  && -d  "/sys/class/net/$br/lower_$TAPNAME" ]]; then

 #         BR=$br

 #         break

 #     fi

 # done

 echo ""

 echo "************************************************"

 echo "VM:$QEMU_NAME ---> tap: $TAPNAME ---> bridge: $BR"

 echo "************************************************"

 echo ""

 echo "************************************************"

 echo "bridge: $BR"

 for port in `ls /sys/class/net/$BR/brif/`; do

     echo "           |__ $port"

 done

 echo "************************************************"

 # BR_PORT="qvb${BR:3}"

 # OVS_PORT="qvo${BR_PORT:3}"

 OVS_BR_INT=""

 echo ""

 echo "************************************************"

 for port in `ls /sys/class/net/$BR/brif/`; do

     PORT_TY=`ethtool -i $port | grep "driver:" |awk '{print $2}'`

     if [[ $PORT_TY == "veth" ]] ; then

         PEER_INDEX=`ethtool -S $port | grep "peer_ifindex:" |awk '{print $2}'`

         for peer in `ls /sys/class/net/`; do

             INDEX=`cat /sys/class/net/$peer/ifindex`

             if [[ $PEER_INDEX == $INDEX ]]; then

                 if [[ -d /sys/class/net/$OVS_PORT/brport/bridge ]]; then

                     OVS_BR_INT=`ls /sys/class/net/$OVS_PORT/brport/bridge -l`

                     OVS_BR_INT=${OVS_BR_INT##*/}

                 else

                     OVS_BR_INT=`sudo ovs-vsctl port-to-br $peer`

                     # OVS_BR_INT=`sudo ovs-vsctl iface-to-br $peer`

                 fi

                 echo "bridge: $BR                                  bridge: $OVS_BR_INT"

                 echo "           |__ patch: $port <----> patch: $peer __|"

             fi

         done

     fi

 done

 echo "************************************************"

 IS_OVS=`sudo ovs-vsctl list-br | grep $OVS_BR_INT`

 OVS_INFOS=`sudo ovs-vsctl show |tr "\n" " "`

 ALL=""

 echo ""

 echo "************************************************"

 while [[ "$OVS_INFOS" =~ "{peer=" ]]

 do

     PORT=${OVS_INFOS%%\}*}

     PORT=${PORT%[[:space:]]*type*}

     PORT=${PORT##*Interface}

     PORT=`echo $PORT`

     PEER=${OVS_INFOS#*\{peer=}

     PEER=${PEER%%\}*}

     OVS_INFOS=${OVS_INFOS#*\{peer=*\}}

     if [[ ! "$ALL" =~ "$PORT" ]]

     then

         ALL="$ALL $PORT $PEER"

         PEER_BR=`sudo ovs-vsctl iface-to-br $PORT`

         BR=`sudo ovs-vsctl iface-to-br $PEER`

         echo "bridge: $BR                                   bridge: $PEER_BR"

         echo "           |__ veth: $PEER <----> veth: $PORT __|"

         echo ""

     else

         continue

     fi

 done

 echo "************************************************"

 # for port in `sudo ovs-vsctl show |grep "options: {peer=" |cut -d "=" -f2`

 # do

 #     port=${port%%\}*}

 #     THIS_BR=`sudo ovs-vsctl iface-to-br $port`

 #     if [[ $THIS_BR == $OVS_BR_INT ]]; then

 #

 #         echo "bridge: $THIS_BR                             bridge: $PEER_BR"

 #         echo "           |__ veth: $port <----> veth: $peer __|"

 #

 #     fi

 # done

 #!/bin/bash

 ST=`nova hypervisor-servers $HOSTNAME | grep $`

 if [[ $? !=  ]] ; then

     echo "not find $1 on $HOSTNAME"

     nova hypervisor-servers $HOSTNAME

     exit

 fi

 ST=`nova show $`

 if [[ $? !=  ]] ; then

     nova list

     exit

 fi

 QEMU_NAME=`nova show $ |grep "OS-EXT-SRV-ATTR:instance_name" | awk '{print $4}'`

 if [[ $? !=  ]] ; then

     exit

 fi

 ST=`sudo virsh domstate $`

 if [[ $? !=  ]] ; then

     exit

 fi

 if [[ "$ST" =~ "shut off" ]] ; then

     sudo virsh list --all

     echo "$QEMU_NAME is shut off"

     exit

 fi

 echo ""

 echo "vm name is: $QEMU_NAME"

 QEMU_CMD=`ps -ef |grep " $QEMU_NAME " |grep -v grep`

 # echo $QEMU_CMD

 QEMU_PID=`cut -d " " -f2 <<< $QEMU_CMD`

 CMD_IFS=""

 IF_FD=""

 HOST_FD=""

 [[ "$QEMU_CMD" =~ "-netdev" ]] && CMD_IFS=${QEMU_CMD#*-netdev}

 [[ "$QEMU_CMD" =~ "tap,fd=" ]] && CMD_IFS=${CMD_IFS#*tap,fd=} && IF_FD=${CMD_IFS%%,*}

 [[ "$QEMU_CMD" =~ "vhostfd=" ]] && CMD_IFS=${CMD_IFS#*vhostfd=} && HOST_FD=${CMD_IFS%% *}

 [[ "$QEMU_CMD" =~ "mac=" ]] && CMD_MAC=${QEMU_CMD#*mac=} && CMD_MAC=${CMD_MAC%%,*}

 echo "qemu pid is: $QEMU_PID, iface host fd: $HOST_FD, iface fd: $IF_FD, iface MAC: $CMD_MAC"

 FLOATING_IP=`nova floating-ip-list |grep $`

 FIX_IP=`awk '{print $8}' <<< $FLOATING_IP`

 FLOATING_IP=`awk '{print $4}' <<< $FLOATING_IP`

 NETINFO=`nova show $ |grep "network  *|"`

 NETINFO=="${NETINFO##network[[:space:]]*|}"

 NET_NAME="${NETINFO%[[:space:]]*network*}"

 NET_NAME="${NET_NAME#*[[:space:]]*}"

 NET_ID=`nova network-show $NET_NAME |grep "| *id *|" |awk '{print $4}'`

 echo " fix ip is: $FIX_IP, floating ip is: $FLOATING_IP"

 echo "network id is: $NET_ID"

 echo "and info please run: sudo ip netns exec qdhcp-$NET_ID"

 # echo `cat /opt/stack/data/neutron/dhcp/$NET_ID/opts |grep "router"`

 # egrep -l iff:.*tap* /proc/*/fdinfo/* 2>/dev/null|cut -d/ -f3

 TAPNAME=`sudo cat /proc/$QEMU_PID/fdinfo/$IF_FD | grep "iff:.*tap*"`

 TAPNAME=${TAPNAME#iff:[[:space:]]*}

 # TAPNAME="${TAPNAME##[[:space:]]}"

 # TAPNAME="${TAPNAME//[[:space:]]/}"

 # kernel version less than 3.14

 if [[ -z $TAPNAME ]];  then

 TAPNAME=`ifconfig |grep ${CMD_MAC:2}`

 TAPNAME="${TAPNAME%%[[:space:]]*}"

 fi

 BR=`ls -l /sys/class/net/$TAPNAME/brport/bridge`

 BR=${BR##*/}

 # BR=""

 # for br in `ls /sys/class/net/`; do

 #     if [[ -d "/sys/class/net/$br/bridge"  && -d  "/sys/class/net/$br/lower_$TAPNAME" ]]; then

 #         BR=$br

 #         break

 #     fi

 # done

 echo ""

 echo "================================================================================"

 echo "The follow are L2 info:"

 echo "************************************************"

 echo "VM:$QEMU_NAME ---> tap: $TAPNAME ---> bridge: $BR"

 echo "************************************************"

 echo ""

 echo "************************************************"

 echo "bridge: $BR"

 for port in `ls /sys/class/net/$BR/brif/`; do

     echo "           |__ port: $port"

 done

 echo "************************************************"

 # BR_PORT="qvb${BR:3}"

 # OVS_PORT="qvo${BR_PORT:3}"

 function br_connetion_brs_by_veth()

 {

     echo ""

     echo "************************************************"

     OVS_BR_INT=""

     BR=$

     for port in `ls /sys/class/net/$BR/brif/`; do

         PORT_TY=`ethtool -i $port | grep "driver:" |awk '{print $2}'`

         if [[ $PORT_TY == "veth" ]] ; then

             PEER_INDEX=`ethtool -S $port | grep "peer_ifindex:" |awk '{print $2}'`

             for peer in `ls /sys/class/net/`; do

                 INDEX=`cat /sys/class/net/$peer/ifindex`

                 BR_TYPE="linux_br"

                 if [[ $PEER_INDEX == $INDEX ]]; then

                     if [[ -d /sys/class/net/$OVS_PORT/brport/bridge ]]; then

                         BR_TYPE="linux_br"

                         OVS_BR_INT=`ls /sys/class/net/$OVS_PORT/brport/bridge -l`

                         OVS_BR_INT=${OVS_BR_INT##*/}

                     else

                         BR_TYPE="ovs_br"

                         OVS_BR_INT=`sudo ovs-vsctl port-to-br $peer`

                         # OVS_BR_INT=`sudo ovs-vsctl iface-to-br $peer`

                     fi

                     echo "bridge: $BR                                  $BR_TYPE: $OVS_BR_INT"

                     echo "           |__ veth: $port <----> veth: $peer __|"

                 fi

             done

         fi

     done

     echo "************************************************"

 }

 br_connetion_brs_by_veth $BR

 # IS_OVS=`sudo ovs-vsctl list-br | grep $OVS_BR_INT`

 echo ""

 echo "************************************************"

 function connetion_between_brs_by_peer()

 {

     OVS_INFOS=`sudo ovs-vsctl show |tr "\n" " "`

     ALL=""

     while [[ "$OVS_INFOS" =~ "{peer=" ]]

     do

         PORT=${OVS_INFOS%%\}*}

         PORT=${PORT%[[:space:]]*type*}

         PORT=${PORT##*Interface}

         PORT=`echo $PORT`

         PEER=${OVS_INFOS#*\{peer=}

         PEER=${PEER%%\}*}

         OVS_INFOS=${OVS_INFOS#*\{peer=*\}}

         if [[ ! "$ALL" =~ "$PORT" ]]

         then

             ALL="$ALL $PORT $PEER"

             PEER_BR=`sudo ovs-vsctl iface-to-br $PORT`

             BR=`sudo ovs-vsctl iface-to-br $PEER`

             echo "ovs_br: $BR                                   ovs_br: $PEER_BR"

             echo "           |__ patch: $PEER <----> patch: $PORT __|"

             echo ""

         else

             continue

         fi

     done

 }

 connetion_between_brs_by_peer

 echo "************************************************"

 echo ""

 echo "================================================================================"

 echo "The follow are L3 info in namesapce:"

 echo ""

 echo "in name space qdhcp-$NET_ID:"

 function ns_info()

 {

     NS=$

     LOCAL_IFS=`sudo ip netns exec $NS ip link |egrep "[0-9]+: " | awk '{print $2}'`

     for i in $LOCAL_IFS

     do

         if [[ ${i%%:} == lo ]]

         then

             continue

         fi

         echo "interface: ${i%%:}"

         sudo ip netns exec $NS ip a show ${i%%:} |grep "global ${i%%:}"

         DVR=`sudo ip netns exec $NS ethtool  -i ${i%%:}|grep "driver:" |awk '{print $2}'`

         if [[ $DVR ==  "openvswitch" ]]

         then

             OVS_BR=`sudo ip netns exec $NS ovs-vsctl iface-to-br ${i%%:}`

             echo "ovs-bridge: $OVS_BR"

             echo "             |__ port: ${i%%:}"

         else

             echo "unknow iface type $DVR"

         fi

         echo ""

     done

     return $((+));

     # return $($NS);

 }

 ns_info qdhcp-$NET_ID

 echo "Get route info by:"

 echo "sudo ip netns exec qdhcp-$NET_ID route"

 echo "Get iptable info by:"

 echo "sudo ip netns exec qdhcp-$NET_ID iptables -nv -t nat -L"

 echo ""

 echo  "namespace router is: "

 for i in `sudo ip netns |grep qrouter-`

 do

     echo "*****************************"

     NAME_S=$i

     ns_info $i

     echo "Get route info by:"

     echo "sudo ip netns exec $NAME_S route"

     echo "Get iptable info by:"

     echo "sudo ip netns exec $NAME_S iptables -nv -t nat -L"

     echo ""

 done

 function filter_link_by_ip()

 {

     for i in `ip netns`;

     do

         L_IP=`sudo ip netns exec $i ip addr |grep $`;

         if [[ ! -z $L_IP ]]; then

             L_PORT=${L_IP##*[[:space:]]}

             echo "sudo ip netns exec $i ip a show $L_PORT"

             sudo ip netns exec $i ip a show $L_PORT

             break

         fi

     done

 }

 # filter_link_by_ip $FLOATING_IP

 #something wrong with this logic

 function ovs_br_2_ovs_br()

 {

     for port in `sudo ovs-vsctl show |grep "options: {peer=" |cut -d "=" -f1`

     do

         port=${port%%\}*}

         echo $port

         THIS_BR=`sudo ovs-vsctl iface-to-br $port`

         if [[ $THIS_BR == $OVS_BR_INT ]]; then

             echo "bridge: $THIS_BR                             bridge: $PEER_BR"

             echo "           |__ veth: $port <----> veth: $peer __|"

         fi

     done

 }

 # ovs_br_2_ovs_br

 # we can use this logic to find which VM attach to br_int

 function connetion_between_brs()

 {

     echo ""

     echo "************************************************"

     IS_OVS=`sudo ovs-vsctl list-br | grep $OVS_BR_INT`

     if [[ $IS_OVS == $OVS_BR_INT ]]; then

         for port in `sudo ovs-vsctl list-ifaces $OVS_BR_INT`; do

             PORT_TY=`ethtool -i $port >&- | grep "driver:" |awk '{print $2}'`

             if [[ $PORT_TY == "veth" ]] ; then

                 PEER_INDEX=`ethtool -S $port | grep "peer_ifindex:" |awk '{print $2}'`

                 for peer in `ls /sys/class/net/`; do

                     INDEX=`cat /sys/class/net/$peer/ifindex`

                     if [[ $PEER_INDEX == $INDEX ]]; then

                         PEER_INT=""

                         if [[ -d /sys/class/net/$peer/brport/bridge ]]; then

                             PEER_INT=`ls /sys/class/net/$peer/brport/bridge -l`

                             PEER_INT=${PEER_INT##*/}

                         else

                             PEER_INT=`sudo ovs-vsctl port-to-br $peer`

                             # PEER_INT=`sudo ovs-vsctl iface-to-br $peer`

                         fi

                         if [[ "x$PEER_INT" == "x" ]]; then

                             continue

                         fi

                         echo "bridge: $OVS_BR_INT                               bridge: $PEER_INT"

                         echo "           |__ veth: $port <----> veth: $peer __|"

                         echo ""

                     fi

                 done

             fi

         done

     fi

     echo "************************************************"

 }

 # connetion_between_brs "br_int"

 NETINFO=`nova show $ |grep "network  *|"`

 function find_nova_net_id()

 {

      NETINFO=$

      NETINFO="${NETINFO##network[[:space:]]*|}"

      NET_NAME="${NETINFO%[[:space:]]*network*}"

      NET_NAME="${NET_NAME#*[[:space:]]*}"

      ID=`nova network-show $NET_NAME |grep "| *id *|" |awk '{print $4}'`

      echo "$ID"

 }

 NET_ID=`find_nova_net_id "$NETINFO"`

 function find_nova_net_ips()

 {

     NETINFO=$

     IPS="${NETINFO#*network[[:space:]]*|}"

     IPS="${IPS%[[:space:]]*|*}"

     IPS="${IPS%[[:space:]]*}"

     IPS=`tr "," " " <<<  ${IPS#*[[:space:]]}`

     for i in $IPS; do echo $i; done

 }

 # NET_ID=`find_nova_net_ips "$NETINFO"`

 # ps ww `pgrep dnsmasq` |grep $NET_ID

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写个脚本列出neutron的ovs的topology。

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