Test container-to-container speed

test-bridge.sh

#!/bin/sh
set -ex
which iperf >/dev/null || apt-get install iperf
mkdir -p /var/run/netns

unshare --net -- sh -c "sleep 3; exec iperf -s" &
PID1=$!
ln -sf /proc/$PID1/ns/net /var/run/netns/ns1 

unshare --net -- sh -c "sleep 3; exec iperf -c 10.1.1.1 -i 1" &
PID2=$!
ln -sf /proc/$PID2/ns/net /var/run/netns/ns2

if ip link ls br0
then true
else
  ip link add br0 type bridge 
  ip link set br0 up
fi

for N in 1 2
do
  ip link add v$N type veth peer name e$N
  ip link set v$N up master br0
  ip link set e$N netns ns$N
  ip netns exec ns$N ip link set e$N up
  ip netns exec ns$N ip link set lo up
  ip netns exec ns$N ip addr add 10.1.1.$N/24 dev e$N
done

wait $PID2
kill $PID1

test-local.sh

#!/bin/sh
set -ex
which iperf >/dev/null || apt-get install iperf

iperf -s &
PID1=$!

iperf -c 127.0.0.1 -i 1

kill $PID1

test-veth.sh

#!/bin/sh
set -ex
which iperf >/dev/null || apt-get install iperf
mkdir -p /var/run/netns

unshare --net -- sh -c "sleep 3; exec iperf -s" &
PID1=$!
ln -sf /proc/$PID1/ns/net /var/run/netns/ns1 

unshare --net -- sh -c "sleep 3; exec iperf -c 10.1.1.1 -i 1" &
PID2=$!
ln -sf /proc/$PID2/ns/net /var/run/netns/ns2

ip link add e1 type veth peer name e2
for N in 1 2
do
  ip link set e$N netns ns$N
  ip netns exec ns$N ip link set lo up
  ip netns exec ns$N ip link set e$N up
  ip netns exec ns$N ip addr add 10.1.1.$N/24 dev e$N
done

wait $PID2
kill $PID1