action: Some more tweaks around private networking + new pipework code [GH-298]
This commit is contained in:
Fabio Rehm
parent
28bdbe371d
commit
bf3a9a5039
4 changed files with 270 additions and 125 deletions
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@ -8,6 +8,7 @@ require 'vagrant-lxc/action/fetch_ip_with_lxc_attach'
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require 'vagrant-lxc/action/fetch_ip_from_dnsmasq_leases'
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require 'vagrant-lxc/action/forced_halt'
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require 'vagrant-lxc/action/forward_ports'
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require 'vagrant-lxc/action/gc_private_network_bridges'
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require 'vagrant-lxc/action/handle_box_metadata'
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require 'vagrant-lxc/action/prepare_nfs_settings'
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require 'vagrant-lxc/action/prepare_nfs_valid_ids'
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@ -131,6 +132,7 @@ module Vagrant
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b3.use ForcedHalt
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end
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end
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b2.use GcPrivateNetworkBridges
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end
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end
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end
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21
lib/vagrant-lxc/action/gc_private_network_bridges.rb
Normal file
21
lib/vagrant-lxc/action/gc_private_network_bridges.rb
Normal file
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@ -0,0 +1,21 @@
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# sudo ifconfig br1 down && sudo brctl delbr br1
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module Vagrant
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module LXC
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module Action
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class GcPrivateNetworkBridges
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def initialize(app, env)
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@app = app
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end
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def call(env)
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if env[:machine].provider.state.id != :running
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puts 'Cleanup bridges!'
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end
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@app.call(env)
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end
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end
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end
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end
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end
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@ -26,11 +26,15 @@ module Vagrant
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container_name = env[:machine].provider.driver.container_name
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ip = config[:ip]
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configure_single_network('br1', container_name, ip)
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bridge_ip = config.fetch(:lxc__bridge_ip) { build_bridge_ip(ip) }
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bridge = config.fetch(:lxc__bridge_name) # { build_bridge_name(config.fetch(:lxc__bridge_prefix, 'br'), bridge_ip) }
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# TODO: ensure_ip_is_not_in_use!
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configure_single_network(bridge, bridge_ip, container_name, ip)
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end
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end
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def configure_single_network(bridge, container_name, ip)
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def configure_single_network(bridge, bridge_ip, container_name, ip)
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cmd = [
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'sudo',
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Vagrant::LXC.source_root.join('scripts/private-network').to_s,
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@ -38,22 +42,35 @@ module Vagrant
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container_name,
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"#{ip}/24"
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]
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puts cmd.join(' ')
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system cmd.join(' ')
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execute(cmd)
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# TODO: Run only if bridge is not up and move it to the private network script
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cmd = [
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'sudo',
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'ip',
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'addr',
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'add',
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# TODO: This should not be hard coded and has to run once per bridge
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"192.168.1.254/24",
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"#{bridge_ip}/24",
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'dev',
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bridge
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]
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execute(cmd)
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end
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def execute(cmd)
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puts cmd.join(' ')
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system cmd.join(' ')
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end
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def build_bridge_ip(ip)
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ip.sub(/^(\d+\.\d+\.\d+)\.\d+/, '\1.254')
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end
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def bridge_name(prefix, bridge_ip)
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# if a bridge with the provided ip and prefix exist, get its name and return it
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# if no bridges can be found, grab the max bridge number, increment it and return the new name
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'br3'
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end
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end
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end
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end
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@ -1,193 +1,298 @@
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#!/bin/bash
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# This is a snapshot of https://github.com/jpetazzo/pipework/blob/edbd33ab49ab0dff0bee46b019055360f325a6e5/pipework
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# with docker specifics trimmed out
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# Borrowed from https://github.com/jpetazzo/pipework
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set -e
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case "$1" in
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--wait)
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WAIT=1
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;;
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--wait)
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WAIT=1
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;;
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esac
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IFNAME=$1
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if [ "$2" == "-i" ]; then
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# default value set further down if not set here
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CONTAINER_IFNAME=
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if [ "$2" = "-i" ]; then
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CONTAINER_IFNAME=$3
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shift 2
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else
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CONTAINER_IFNAME=eth1
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fi
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GUESTNAME=$2
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IPADDR=$3
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MACADDR=$4
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if echo $MACADDR | grep -q @
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then
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VLAN=$(echo $MACADDR | cut -d@ -f2)
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MACADDR=$(echo $MACADDR | cut -d@ -f1)
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else
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VLAN=
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fi
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[ "$IPADDR" ] || [ "$WAIT" ] || {
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echo "Syntax:"
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echo "pipework <hostinterface> [-i containerinterface] <guest> <ipaddr>/<subnet>[@default_gateway] [macaddr][@vlan]"
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echo "pipework <hostinterface> [-i containerinterface] <guest> dhcp [macaddr][@vlan]"
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echo "pipework --wait [-i containerinterface]"
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exit 1
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}
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# First step: determine type of first argument (bridge, physical interface...), skip if --wait set
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if [ -z "$WAIT" ]; then
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if [ -d /sys/class/net/$IFNAME ]
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then
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if [ -d /sys/class/net/$IFNAME/bridge ]
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then
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IFTYPE=bridge
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BRTYPE=linux
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elif $(which ovs-vsctl >/dev/null 2>&1) && $(ovs-vsctl list-br|grep -q ^$IFNAME$)
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then
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IFTYPE=bridge
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BRTYPE=openvswitch
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elif [ $(cat /sys/class/net/$IFNAME/type) -eq 32 ]; # Infiniband IPoIB interface type 32
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then
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IFTYPE=ipoib
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# The IPoIB kernel module is fussy, set device name to ib0 if not overridden
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CONTAINER_IFNAME=${CONTAINER_IFNAME:-ib0}
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else IFTYPE=phys
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fi
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else
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# case "$IFNAME" in
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# br*)
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IFTYPE=bridge
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BRTYPE=linux
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# ;;
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# ovs*)
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# if ! $(which ovs-vsctl >/dev/null)
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# then
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# echo "Need OVS installed on the system to create an ovs bridge"
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# exit 1
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# fi
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# IFTYPE=bridge
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# BRTYPE=openvswitch
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# ;;
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# *)
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# echo "I do not know how to setup interface $IFNAME."
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# exit 1
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# ;;
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# esac
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fi
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fi
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# Set the default container interface name to eth1 if not already set
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CONTAINER_IFNAME=${CONTAINER_IFNAME:-eth1}
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[ "$WAIT" ] && {
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while ! grep -q ^1$ /sys/class/net/$CONTAINER_IFNAME/carrier 2>/dev/null
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do sleep 1
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do sleep 1
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done
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exit 0
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}
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[ "$IPADDR" ] || {
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echo "Syntax:"
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echo "pipework <hostinterface> [-i containerinterface] <guest> <ipaddr>/<subnet>[@default_gateway] [macaddr]"
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echo "pipework <hostinterface> [-i containerinterface] <guest> dhcp [macaddr]"
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echo "pipework --wait"
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exit 1
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[ $IFTYPE = bridge ] && [ $BRTYPE = linux ] && [ "$VLAN" ] && {
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echo "VLAN configuration currently unsupported for Linux bridge."
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exit 1
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}
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# First step: determine type of first argument (bridge, physical interface...)
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if [ -d /sys/class/net/$IFNAME ]
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then
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if [ -d /sys/class/net/$IFNAME/bridge ]
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then
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IFTYPE=bridge
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BRTYPE=linux
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elif $(which ovs-vsctl >/dev/null) && $(ovs-vsctl list-br|grep -q ^$IFNAME$)
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then
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IFTYPE=bridge
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BRTYPE=openvswitch
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else IFTYPE=phys
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fi
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else
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case "$IFNAME" in
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br*)
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IFTYPE=bridge
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BRTYPE=linux
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;;
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*)
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echo "I do not know how to setup interface $IFNAME."
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exit 1
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;;
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esac
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fi
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[ $IFTYPE = ipoib ] && [ $MACADDR ] && {
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echo "MACADDR configuration unsupported for IPoIB interfaces."
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exit 1
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}
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# Second step: find the guest
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# Second step: find the guest (for now, we only support LXC containers)
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while read dev mnt fstype options dump fsck
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do
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[ "$fstype" != "cgroup" ] && continue
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echo $options | grep -qw devices || continue
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CGROUPMNT=$mnt
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[ "$fstype" != "cgroup" ] && continue
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echo $options | grep -qw devices || continue
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CGROUPMNT=$mnt
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done < /proc/mounts
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[ "$CGROUPMNT" ] || {
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echo "Could not locate cgroup mount point."
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exit 1
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echo "Could not locate cgroup mount point."
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exit 1
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}
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# Try to find a cgroup matching exactly the provided name.
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N=$(find "$CGROUPMNT" -name "$GUESTNAME" | wc -l)
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case "$N" in
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0)
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echo "Container $GUESTNAME not found."
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exit 1
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;;
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1)
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true
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;;
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*)
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echo "Found more than one container matching $GUESTNAME."
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exit 1
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;;
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0)
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# If we didn't find anything, try to lookup the container with Docker.
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if which docker >/dev/null
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then
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RETRIES=3
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while [ $RETRIES -gt 0 ]; do
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DOCKERPID=$(docker inspect --format='{{ .State.Pid }}' $GUESTNAME)
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[ $DOCKERPID != 0 ] && break
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sleep 1
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RETRIES=$((RETRIES - 1))
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done
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[ "$DOCKERPID" = 0 ] && {
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echo "Docker inspect returned invalid PID 0"
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exit 1
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}
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[ "$DOCKERPID" = "<no value>" ] && {
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echo "Container $GUESTNAME not found, and unknown to Docker."
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exit 1
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}
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else
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echo "Container $GUESTNAME not found, and Docker not installed."
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exit 1
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fi
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;;
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1)
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true
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;;
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*)
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echo "Found more than one container matching $GUESTNAME."
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exit 1
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;;
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esac
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if [ "$IPADDR" = "dhcp" ]
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then
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# Check for first available dhcp client
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DHCP_CLIENT_LIST="udhcpc dhcpcd dhclient"
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for CLIENT in $DHCP_CLIENT_LIST; do
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which $CLIENT >/dev/null && {
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DHCP_CLIENT=$CLIENT
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break
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# Check for first available dhcp client
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DHCP_CLIENT_LIST="udhcpc dhcpcd dhclient"
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for CLIENT in $DHCP_CLIENT_LIST; do
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which $CLIENT >/dev/null && {
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DHCP_CLIENT=$CLIENT
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break
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}
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done
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[ -z $DHCP_CLIENT ] && {
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echo "You asked for DHCP; but no DHCP client could be found."
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exit 1
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}
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done
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[ -z $DHCP_CLIENT ] && {
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echo "You asked for DHCP; but no DHCP client could be found."
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exit 1
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}
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else
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# Check if a subnet mask was provided.
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echo $IPADDR | grep -q / || {
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echo "The IP address should include a netmask."
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echo "Maybe you meant $IPADDR/24 ?"
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exit 1
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}
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# Check if a gateway address was provided.
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if echo $IPADDR | grep -q @
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then
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GATEWAY=$(echo $IPADDR | cut -d@ -f2)
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IPADDR=$(echo $IPADDR | cut -d@ -f1)
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else
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GATEWAY=
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fi
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# Check if a subnet mask was provided.
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echo $IPADDR | grep -q / || {
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echo "The IP address should include a netmask."
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echo "Maybe you meant $IPADDR/24 ?"
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exit 1
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}
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# Check if a gateway address was provided.
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if echo $IPADDR | grep -q @
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then
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GATEWAY=$(echo $IPADDR | cut -d@ -f2)
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IPADDR=$(echo $IPADDR | cut -d@ -f1)
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else
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GATEWAY=
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fi
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fi
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NSPID=$(head -n 1 $(find "$CGROUPMNT" -name "$GUESTNAME" | head -n 1)/tasks)
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[ "$NSPID" ] || {
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echo "Could not find a process inside container $GUESTNAME."
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exit 1
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if [ $DOCKERPID ]; then
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NSPID=$DOCKERPID
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else
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NSPID=$(head -n 1 $(find "$CGROUPMNT" -name "$GUESTNAME" | head -n 1)/tasks)
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[ "$NSPID" ] || {
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echo "Could not find a process inside container $GUESTNAME."
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exit 1
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}
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fi
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# Check if an incompatible VLAN device already exists
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[ $IFTYPE = phys ] && [ "$VLAN" ] && [ -d /sys/class/net/$IFNAME.VLAN ] && {
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[ -z "$(ip -d link show $IFNAME.$VLAN | grep "vlan.*id $VLAN")" ] && {
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echo "$IFNAME.VLAN already exists but is not a VLAN device for tag $VLAN"
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exit 1
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}
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}
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[ ! -d /var/run/netns ] && mkdir -p /var/run/netns
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[ -f /var/run/netns/$NSPID ] && rm -f /var/run/netns/$NSPID
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ln -s /proc/$NSPID/ns/net /var/run/netns/$NSPID
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# Check if we need to create a bridge.
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[ $IFTYPE = bridge ] && [ ! -d /sys/class/net/$IFNAME ] && {
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(ip link set $IFNAME type bridge > /dev/null 2>&1) || (brctl addbr $IFNAME)
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ip link set $IFNAME up
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[ $BRTYPE = linux ] && {
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(ip link add dev $IFNAME type bridge > /dev/null 2>&1) || (brctl addbr $IFNAME)
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ip link set $IFNAME up
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}
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[ $BRTYPE = openvswitch ] && {
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ovs-vsctl add-br $IFNAME
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}
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}
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MTU=$(ip link show $IFNAME | awk '{print $5}')
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# If it's a bridge, we need to create a veth pair
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[ $IFTYPE = bridge ] && {
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LOCAL_IFNAME=pl$NSPID$CONTAINER_IFNAME
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GUEST_IFNAME=pg$NSPID$CONTAINER_IFNAME
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ip link add name $LOCAL_IFNAME type veth peer name $GUEST_IFNAME
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case "$BRTYPE" in
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linux)
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(ip link set $LOCAL_IFNAME master $IFNAME > /dev/null 2>&1) || (brctl addif $IFNAME $LOCAL_IFNAME)
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;;
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openvswitch)
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ovs-vsctl add-port $IFNAME $LOCAL_IFNAME
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;;
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esac
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ip link set $LOCAL_IFNAME up
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LOCAL_IFNAME="v${CONTAINER_IFNAME}pl${NSPID}"
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GUEST_IFNAME="v${CONTAINER_IFNAME}pg${NSPID}"
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ip link add name $LOCAL_IFNAME mtu $MTU type veth peer name $GUEST_IFNAME mtu $MTU
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case "$BRTYPE" in
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linux)
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(ip link set $LOCAL_IFNAME master $IFNAME > /dev/null 2>&1) || (brctl addif $IFNAME $LOCAL_IFNAME)
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;;
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openvswitch)
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ovs-vsctl add-port $IFNAME $LOCAL_IFNAME ${VLAN:+"tag=$VLAN"}
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;;
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esac
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ip link set $LOCAL_IFNAME up
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}
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# Note: if no container interface name was specified, pipework will default to ib0
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# Note: no macvlan subinterface or ethernet bridge can be created against an
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# ipoib interface. Infiniband is not ethernet. ipoib is an IP layer for it.
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# To provide additional ipoib interfaces to containers use SR-IOV and pipework
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# to assign them.
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[ $IFTYPE = ipoib ] && {
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GUEST_IFNAME=$CONTAINER_IFNAME
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}
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# If it's a physical interface, create a macvlan subinterface
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[ $IFTYPE = phys ] && {
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GUEST_IFNAME=ph$NSPID$CONTAINER_IFNAME
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ip link add link $IFNAME dev $GUEST_IFNAME type macvlan mode bridge
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ip link set $IFNAME up
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[ "$VLAN" ] && {
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[ ! -d /sys/class/net/$IFNAME.$VLAN ] && {
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ip link add link $IFNAME name $IFNAME.$VLAN mtu $MTU type vlan id $VLAN
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}
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ip link set $IFNAME up
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IFNAME=$IFNAME.$VLAN
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}
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GUEST_IFNAME=ph$NSPID$CONTAINER_IFNAME
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ip link add link $IFNAME dev $GUEST_IFNAME mtu $MTU type macvlan mode bridge
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ip link set $IFNAME up
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}
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ip link set $GUEST_IFNAME netns $NSPID
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ip netns exec $NSPID ip link set $GUEST_IFNAME name $CONTAINER_IFNAME
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[ "$MACADDR" ] && ip netns exec $NSPID ip link set $CONTAINER_IFNAME address $MACADDR
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[ "$MACADDR" ] && ip netns exec $NSPID ip link set dev $CONTAINER_IFNAME address $MACADDR
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if [ "$IPADDR" = "dhcp" ]
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then
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[ $DHCP_CLIENT = "udhcpc" ] && ip netns exec $NSPID $DHCP_CLIENT -qi $CONTAINER_IFNAME
|
||||
[ $DHCP_CLIENT = "dhclient" ] && ip netns exec $NSPID $DHCP_CLIENT $CONTAINER_IFNAME
|
||||
[ $DHCP_CLIENT = "dhcpcd" ] && ip netns exec $NSPID $DHCP_CLIENT -q $CONTAINER_IFNAME
|
||||
[ $DHCP_CLIENT = "udhcpc" ] && ip netns exec $NSPID $DHCP_CLIENT -qi $CONTAINER_IFNAME -x hostname:$GUESTNAME
|
||||
if [ $DHCP_CLIENT = "dhclient" ]
|
||||
then
|
||||
# kill dhclient after get ip address to prevent device be used after container close
|
||||
ip netns exec $NSPID $DHCP_CLIENT -pf "/var/run/dhclient.$NSPID.pid" $CONTAINER_IFNAME
|
||||
kill "$(cat "/var/run/dhclient.$NSPID.pid")"
|
||||
rm "/var/run/dhclient.$NSPID.pid"
|
||||
fi
|
||||
[ $DHCP_CLIENT = "dhcpcd" ] && ip netns exec $NSPID $DHCP_CLIENT -q $CONTAINER_IFNAME -h $GUESTNAME
|
||||
else
|
||||
ip netns exec $NSPID ip addr add $IPADDR dev $CONTAINER_IFNAME
|
||||
[ "$GATEWAY" ] && {
|
||||
ip netns exec $NSPID ip route delete default >/dev/null 2>&1 && true
|
||||
}
|
||||
ip netns exec $NSPID ip link set $CONTAINER_IFNAME up
|
||||
[ "$GATEWAY" ] && {
|
||||
ip netns exec $NSPID ip route replace default via $GATEWAY
|
||||
}
|
||||
ip netns exec $NSPID ip addr add $IPADDR dev $CONTAINER_IFNAME
|
||||
[ "$GATEWAY" ] && {
|
||||
ip netns exec $NSPID ip route delete default >/dev/null 2>&1 && true
|
||||
}
|
||||
ip netns exec $NSPID ip link set $CONTAINER_IFNAME up
|
||||
[ "$GATEWAY" ] && {
|
||||
ip netns exec $NSPID ip route get $GATEWAY >/dev/null 2>&1 || \
|
||||
ip netns exec $NSPID ip route add $GATEWAY/32 dev $CONTAINER_IFNAME
|
||||
ip netns exec $NSPID ip route replace default via $GATEWAY
|
||||
}
|
||||
fi
|
||||
|
||||
# Give our ARP neighbors a nudge about the new interface
|
||||
if which arping > /dev/null 2>&1
|
||||
then
|
||||
IPADDR=$(echo $IPADDR | cut -d/ -f1)
|
||||
ip netns exec $NSPID arping -c 1 -A -I $CONTAINER_IFNAME $IPADDR > /dev/null 2>&1
|
||||
IPADDR=$(echo $IPADDR | cut -d/ -f1)
|
||||
ip netns exec $NSPID arping -c 1 -A -I $CONTAINER_IFNAME $IPADDR > /dev/null 2>&1 || true
|
||||
else
|
||||
echo "Warning: arping not found; interface may not be immediately reachable"
|
||||
echo "Warning: arping not found; interface may not be immediately reachable"
|
||||
fi
|
||||
|
||||
# Remove NSPID to avoid `ip netns` catch it.
|
||||
[ -f /var/run/netns/$NSPID ] && rm -f /var/run/netns/$NSPID
|
||||
exit 0
|
||||
|
|
|
|||
Loading…
Reference in a new issue