Update dpdkbind.service with EnvironmentFile

developers/Vagrantfile

@@ -137,6 +137,7 @@ sudo sysctl -w vm.nr_hugepages=1024
 sudo cp /tmp/ovs-vswitchd.service /etc/systemd/system/ovs-vswitchd.service
 sudo cp /tmp/ovsdb-server.service /etc/systemd/system/ovsdb-server.service
 sudo cp /tmp/dpdkbind.service /etc/systemd/system/dpdkbind.service
+sudo cp /tmp/dpdkbind /etc/default/dpdkbind
 
 # Name of network interface provisioned for DPDK to bind
 export NET_IF_NAME=enp0s18
@@ -181,8 +182,6 @@ echo "igb_uio" | sudo tee -a /etc/modules
 
 # Bind secondary network adapter
 # Note that this NIC setup will binding dpdk port after reboot
-echo "ExecStart=/sbin/ifconfig ${NET_IF_NAME} down" | sudo tee -a /etc/systemd/system/dpdkbind.service
-echo "ExecStart=${DPDK_DIR}/usertools/dpdk-devbind.py --bind=igb_uio ${NET_IF_NAME}" | sudo tee -a /etc/systemd/system/dpdkbind.service
 sudo systemctl enable dpdkbind
 sudo systemctl start dpdkbind
 sudo ${DPDK_DIR}/usertools/dpdk-devbind.py --status
@@ -234,6 +233,7 @@ SHELL
      config.vm.provision "file", source: "systemctl/ovs-vswitchd.service", destination: "/tmp/ovs-vswitchd.service"
      config.vm.provision "file", source: "systemctl/ovsdb-server.service", destination: "/tmp/ovsdb-server.service"
      config.vm.provision "file", source: "systemctl/dpdkbind.service", destination: "/tmp/dpdkbind.service"
+     config.vm.provision "file", source: "systemctl/dpdkbind", destination: "/tmp/dpdkbind"
      config.vm.provision "shell", privileged: false, inline: $ovs_dpdk
   else
      config.vm.provision "shell", privileged: false, inline: $apt_openvswitch

developers/systemctl/dpdkbind

@@ -0,0 +1 @@
+NET_IF_NAME=enp0s18

developers/systemctl/dpdkbind.service

@@ -8,3 +8,6 @@ WantedBy=multi-user.target
 [Service]
 Type=oneshot
 RemainAfterExit=true
+EnvironmentFile=-/etc/default/dpdkbind
+ExecStart=/sbin/ifconfig "$NET_IF_NAME" down
+ExecStart=/usr/src/dpdk-stable-17.11.2/usertools/dpdk-devbind.py --bind=igb_uio "$NET_IF_NAME"