Unverified Commit 5a828006 authored by Kroese's avatar Kroese Committed by GitHub
Browse files

macvtap

parent 402856d4

run/network.sh

+34 −34
Original line number Diff line number Diff line
@@ -4,6 +4,7 @@ set -eu 
# Docker environment variabeles



: ${VM_NET_TAP:='dsm'}

: ${VM_NET_DEV:='eth0'}

: ${VM_NET_HOST:='VirtualDSM'}

: ${VM_NET_MAC:='02:11:32:AA:BB:CC'}
@@ -19,41 +20,28 @@ set -eu 


configureDHCP() {



  # Create /dev/vhost-net

  if [ ! -c /dev/vhost-net ]; then

    mknod /dev/vhost-net c 10 238

    chmod 660 /dev/vhost-net

  fi



  if [ ! -c /dev/vhost-net ]; then

    echo -n "Error: VHOST interface not available. Please add the following "

    echo "docker variable to your container: --device=/dev/vhost-net" && exit 85

  fi



  # Create macvlan to enable host <> guest communication



  VM_NET_VLAN="vlan"

  GATEWAY=$(ip r | grep default | awk '{print $3}')

  IP=$(ip address show dev eth0 | grep inet | awk '/inet / { print $2 }' | cut -f1 -d/)

  NETWORK=$(ip -o route | grep eth0 | grep -v default | awk '{print $1}')

  NETWORK=$(ip -o route | grep "${VM_NET_DEV}" | grep -v default | awk '{print $1}')

  IP=$(ip address show dev "${VM_NET_DEV}" | grep inet | awk '/inet / { print $2 }' | cut -f1 -d/)



  ip l add link eth0 macvlan0 type macvlan mode bridge

  ip l add link "${VM_NET_DEV}" "${VM_NET_VLAN}" type macvlan mode bridge



  ip address add "${IP}" dev macvlan0

  ip link set dev macvlan0 up

  ip address add "${IP}" dev "${VM_NET_VLAN}"

  ip link set dev "${VM_NET_VLAN}" up



  ip route flush dev eth0

  ip route flush dev macvlan0

  ip route flush dev "${VM_NET_DEV}"

  ip route flush dev "${VM_NET_VLAN}"



  ip route add $NETWORK dev macvlan0 metric 0

  ip route add $NETWORK dev "${VM_NET_VLAN}" metric 0

  ip route add default via "${GATEWAY}"



  echo "Info: Retrieving IP via DHCP using MAC ${VM_NET_MAC}..."



  # Create macvtap

  ip l add link eth0 name "${VM_NET_TAP}" address "${VM_NET_MAC}" type macvtap mode bridge || true

  ip l add link "${VM_NET_DEV}" name "${VM_NET_TAP}" address "${VM_NET_MAC}" type macvtap mode bridge || true

  ip l set "${VM_NET_TAP}" up



  ip a flush eth0

  ip a flush "${VM_NET_DEV}"

  ip a flush "${VM_NET_TAP}"



  DHCP_IP=$( dhclient -v "${VM_NET_TAP}" 2>&1 | grep ^bound | cut -d' ' -f3 )
@@ -64,11 +52,19 @@ configureDHCP() { 
    echo "ERROR: Cannot retrieve IP from DHCP using MAC ${VM_NET_MAC}" && exit 16

  fi



  # Store IP for Docker healthcheck

  echo "${DHCP_IP}" > "/var/dsm.ip"



  ip a flush "${VM_NET_TAP}"



  # Create /dev/vhost-net

  if [ ! -c /dev/vhost-net ]; then

    mknod /dev/vhost-net c 10 238

    chmod 660 /dev/vhost-net

  fi



  if [ ! -c /dev/vhost-net ]; then

    echo -n "Error: VHOST interface not available. Please add the following "

    echo "docker variable to your container: --device=/dev/vhost-net" && exit 85

  fi



  TAP_NR=$(</sys/class/net/"${VM_NET_TAP}"/ifindex)

  TAP_PATH="/dev/tap${TAP_NR}"
@@ -97,6 +93,9 @@ configureDHCP() { 
    echo "variable to your container: --device=/dev/vhost-net" && exit 22

  fi



  # Store IP for Docker healthcheck

  echo "${DHCP_IP}" > "/var/dsm.ip"



  NET_OPTS="-netdev tap,id=hostnet0,vhost=on,vhostfd=40,fd=30"

}
@@ -104,22 +103,20 @@ configureNAT () { 


  VM_NET_IP='20.20.20.21'



  # Store IP for Docker healthcheck

  echo "${VM_NET_IP}" > "/var/dsm.ip"



  #Create bridge with static IP for the VM guest

  brctl addbr dockerbridge

  ip addr add ${VM_NET_IP%.*}.1/24 broadcast ${VM_NET_IP%.*}.255 dev dockerbridge

  ip link set dockerbridge up



  #QEMU Works with taps, set tap to the bridge created

  ip tuntap add dev "${VM_NET_TAP}" mode tap

  ip link set "${VM_NET_TAP}" up promisc on

  brctl addif dockerbridge "${VM_NET_TAP}"



  #Add internet connection to the VM

  iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE

  iptables -t nat -A PREROUTING -i eth0 -p tcp  -j DNAT --to $VM_NET_IP

  iptables -t nat -A PREROUTING -i eth0 -p udp  -j DNAT --to $VM_NET_IP

  iptables -t nat -A POSTROUTING -o "${VM_NET_DEV}" -j MASQUERADE

  iptables -t nat -A PREROUTING -i "${VM_NET_DEV}" -p tcp  -j DNAT --to $VM_NET_IP

  iptables -t nat -A PREROUTING -i "${VM_NET_DEV}" -p udp  -j DNAT --to $VM_NET_IP



  # Hack for guest VMs complaining about "bad udp checksums in 5 packets"

  iptables -A POSTROUTING -t mangle -p udp --dport bootpc -j CHECKSUM --checksum-fill || true
@@ -134,6 +131,9 @@ configureNAT () { 
  echo "0 $VM_NET_MAC $VM_NET_IP $VM_NET_HOST 01:${VM_NET_MAC}" > /var/lib/misc/dnsmasq.leases

  chmod 644 /var/lib/misc/dnsmasq.leases



  # Store IP for Docker healthcheck

  echo "${VM_NET_IP}" > "/var/dsm.ip"



  NET_OPTS="-netdev tap,ifname=${VM_NET_TAP},script=no,downscript=no,id=hostnet0"



  # Build DNS options from container /etc/resolv.conf
@@ -182,7 +182,7 @@ GATEWAY=$(ip r | grep default | awk '{print $3}') 


if [ "$DEBUG" = "Y" ]; then



  IP=$(ip address show dev eth0 | grep inet | awk '/inet / { print $2 }' | cut -f1 -d/)

  IP=$(ip address show dev "${VM_NET_DEV}" | grep inet | awk '/inet / { print $2 }' | cut -f1 -d/)

  echo "Info: Container IP is ${IP} with gateway ${GATEWAY}"

  ifconfig

  ip route