8fc8fb7afe
...I forgot about one occurrence of this. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
250 lines
5.8 KiB
Text
250 lines
5.8 KiB
Text
# SPDX-License-Identifier: AGPL-3.0-or-later
|
|
#
|
|
# PASST - Plug A Simple Socket Transport
|
|
# for qemu/UNIX domain socket mode
|
|
#
|
|
# PASTA - Pack A Subtle Tap Abstraction
|
|
# for network namespace/tap device mode
|
|
#
|
|
# test/demo/passt - Quick introduction to passt
|
|
#
|
|
# Copyright (c) 2021 Red Hat GmbH
|
|
# Author: Stefano Brivio <sbrivio@redhat.com>
|
|
|
|
say This is a short introduction to
|
|
em passt
|
|
say .
|
|
nl
|
|
nl
|
|
sleep 3
|
|
|
|
say Let's fetch the source
|
|
sleep 1
|
|
tempdir TEMPDIR
|
|
host cd __TEMPDIR__
|
|
host git clone https://passt.top/passt
|
|
sleep 1
|
|
|
|
say and build it.
|
|
sleep 1
|
|
host cd passt
|
|
host make
|
|
sleep 1
|
|
|
|
nl
|
|
nl
|
|
say A quick look at the man page...
|
|
sleep 1
|
|
hostb man ./passt.1
|
|
sleep 5
|
|
hostb /ports
|
|
sleep 2
|
|
hostb n
|
|
sleep 2
|
|
hostb n
|
|
sleep 10
|
|
|
|
nl
|
|
say '-t' to forward TCP ports.
|
|
sleep 3
|
|
host q
|
|
|
|
nl
|
|
nl
|
|
say Let's create a small initramfs image for the guest.
|
|
guest cd __TEMPDIR__
|
|
guest git clone git://mbuto.sh/mbuto
|
|
guest cd mbuto
|
|
guest ./mbuto -f passt.img -p __TEMPDIR__/passt/test/passt.mbuto -c lz4
|
|
sleep 2
|
|
|
|
nl
|
|
nl
|
|
say We want to isolate passt and guest in a
|
|
nl
|
|
say network namespace. For convenience, we'll
|
|
nl
|
|
say create it with 'pasta', see also the
|
|
nl
|
|
say 'pasta' demo above.
|
|
sleep 3
|
|
|
|
passt cd __TEMPDIR__/passt
|
|
passtb ./pasta
|
|
sleep 3
|
|
passt /sbin/dhclient -4 --no-pid
|
|
sleep 2
|
|
passt /sbin/dhclient -6 --no-pid
|
|
sleep 2
|
|
|
|
nl
|
|
nl
|
|
say Now let's run 'passt' in the new namespace, and
|
|
nl
|
|
say enter this namespace from the guest terminal too.
|
|
sleep 3
|
|
guest pstree -p | grep pasta
|
|
gout TARGET_PID pstree -p | grep pasta | sed -n 's/.*(\([0-9].*\))$/\1/p'
|
|
sleep 1
|
|
|
|
passtb ./passt -f -t 5201,5203
|
|
sleep 2
|
|
|
|
guest nsenter -t __TARGET_PID__ -U -n --preserve-credentials
|
|
sleep 5
|
|
|
|
nl
|
|
nl
|
|
say We're ready to start qemu with the qrap wrapper,
|
|
nl
|
|
say that we currently need to connect the netdev
|
|
nl
|
|
say back-end to passt's UNIX domain socket.
|
|
sleep 2
|
|
hout VMLINUZ echo "/boot/vmlinuz-$(uname -r)"
|
|
guest ../passt/qrap 5 qemu-system-x86_64 -enable-kvm -m 4096 -cpu host -smp 4 -kernel __VMLINUZ__ -initrd passt.img -nographic -serial stdio -nodefaults -append "console=ttyS0 virtio-net.napi_tx=1" -device virtio-net-pci,netdev=hostnet0,x-txburst=16384 -netdev socket,fd=5,id=hostnet0
|
|
sleep 10
|
|
|
|
nl
|
|
nl
|
|
guest ip link show
|
|
sleep 3
|
|
say Guest is up. Let's configure IPv4 first...
|
|
sleep 2
|
|
ns ip link set dev eth0 up
|
|
sleep 2
|
|
guest dhclient -4
|
|
sleep 2
|
|
guest ip addr show
|
|
sleep 5
|
|
|
|
nl
|
|
say SLAAC is already done, but we can also
|
|
nl
|
|
say get another address via DHCPv6.
|
|
sleep 3
|
|
guest dhclient -6
|
|
sleep 3
|
|
|
|
nl
|
|
nl
|
|
say Let's try to communicate between host and guest.
|
|
sleep 2
|
|
guestb nc -6 -l -p 5201
|
|
sleep 2
|
|
host echo "Hello from the host" | nc -N ::1 5201
|
|
sleep 5
|
|
|
|
nl
|
|
nl
|
|
say Now the other way around... using
|
|
nl
|
|
say the address of the default gateway.
|
|
sleep 2
|
|
gout GW ip -j -4 route show|jq -rM '.[] | select(.dst == "default").gateway'
|
|
sleep 5
|
|
hostb nc -l -p 31337
|
|
sleep 2
|
|
guest echo "Hello from the guest" | nc -N __GW__ 31337
|
|
sleep 3
|
|
|
|
nl
|
|
nl
|
|
say Let's have a (quick!) look at performance
|
|
nl
|
|
say more in the "Performance" section below.
|
|
sleep 3
|
|
|
|
host nsenter -t __TARGET_PID__ -U -n --preserve-credentials
|
|
|
|
guest /sbin/sysctl -w net.core.rmem_max=536870912
|
|
guest /sbin/sysctl -w net.core.wmem_max=536870912
|
|
guest /sbin/sysctl -w net.core.rmem_default=33554432
|
|
guest /sbin/sysctl -w net.core.wmem_default=33554432
|
|
guest /sbin/sysctl -w net.ipv4.tcp_rmem="4096 131072 268435456"
|
|
guest /sbin/sysctl -w net.ipv4.tcp_wmem="4096 131072 268435456"
|
|
guest /sbin/sysctl -w net.ipv4.tcp_timestamps=0
|
|
|
|
host sysctl -w net.ipv4.tcp_rmem="4096 524288 134217728"
|
|
host sysctl -w net.ipv4.tcp_wmem="4096 524288 134217728"
|
|
host sysctl -w net.ipv4.tcp_timestamps=0
|
|
|
|
gout GW6 ip -j -6 route show|jq -rM '.[] | select(.dst == "default").gateway'
|
|
gout IFNAME ip -j link show | jq -rM '.[] | select(.link_type == "ether").ifname'
|
|
nl
|
|
nl
|
|
info Throughput in Gbps, latency in µs
|
|
th flow host>guest guest>host
|
|
|
|
set OPTS -P4 -w 64M -l 1M -i1 --pacing-timer 100000
|
|
|
|
tr TCP/IPv6 throughput
|
|
hostb sleep 10; iperf3 -c ::1 __OPTS__
|
|
gout BW iperf3 -s1J | jq -rM ".end.sum_received.bits_per_second"
|
|
bw __BW__ 2.0 3.0
|
|
sleep 5
|
|
guestb sleep 10; iperf3 -c __GW6__%__IFNAME__ -p 5202 __OPTS__ -O3
|
|
hout BW iperf3 -s1J -p 5202 | jq -rM ".end.sum_received.bits_per_second"
|
|
bw __BW__ 2.0 3.0
|
|
|
|
tl TCP/IPv6 RR latency
|
|
guestb tcp_rr -C 5201 -P 5203 -6 --nolog
|
|
sleep 2
|
|
hout LAT tcp_rr -C 5201 -P 5203 --nolog -c -H ::1 | sed -n 's/^throughput=\(.*\)/\1/p'
|
|
lat __LAT__ 1000 800
|
|
sleep 2
|
|
hostb tcp_rr -6 --nolog
|
|
sleep 2
|
|
gout LAT tcp_rr --nolog -c -H __GW6__%__IFNAME__ | sed -n 's/^throughput=\(.*\)/\1/p'
|
|
lat __LAT__ 1000 800
|
|
sleep 2
|
|
|
|
tl TCP/IPv6 CRR latency
|
|
guestb tcp_crr -C 5201 -P 5203 -6 --nolog
|
|
sleep 2
|
|
hout LAT tcp_crr -C 5201 -P 5203 --nolog -c -H ::1 | sed -n 's/^throughput=\(.*\)/\1/p'
|
|
lat __LAT__ 1000 800
|
|
sleep 2
|
|
hostb tcp_crr -6 --nolog
|
|
sleep 2
|
|
gout LAT tcp_crr --nolog -c -H __GW6__%__IFNAME__ | sed -n 's/^throughput=\(.*\)/\1/p'
|
|
lat __LAT__ 1000 800
|
|
sleep 2
|
|
|
|
tr TCP/IPv4 throughput
|
|
hostb sleep 10; iperf3 -c 127.0.0.1 __OPTS__
|
|
gout BW iperf3 -s1J | jq -rM ".end.sum_received.bits_per_second"
|
|
bw __BW__ 2.0 3.0
|
|
sleep 5
|
|
guestb sleep 10; iperf3 -c __GW__ -p 5202 __OPTS__ -O3
|
|
hout BW iperf3 -s1J -p 5202 | jq -rM ".end.sum_received.bits_per_second"
|
|
bw __BW__ 2.0 3.0
|
|
|
|
tl TCP/IPv4 RR latency
|
|
guestb tcp_rr -C 5201 -P 5203 -4 --nolog
|
|
sleep 2
|
|
hout LAT tcp_rr -C 5201 -P 5203 --nolog -c -H 127.0.0.1 | sed -n 's/^throughput=\(.*\)/\1/p'
|
|
lat __LAT__ 1000 800
|
|
sleep 2
|
|
hostb tcp_rr -4 --nolog
|
|
sleep 2
|
|
gout LAT tcp_rr --nolog -c -H __GW__ | sed -n 's/^throughput=\(.*\)/\1/p'
|
|
lat __LAT__ 1000 800
|
|
sleep 2
|
|
|
|
tl TCP/IPv4 CRR latency
|
|
guestb tcp_crr -C 5201 -P 5203 -4 --nolog
|
|
sleep 2
|
|
hout LAT tcp_crr -C 5201 -P 5203 --nolog -c -H 127.0.0.1 | sed -n 's/^throughput=\(.*\)/\1/p'
|
|
lat __LAT__ 1000 800
|
|
sleep 2
|
|
hostb tcp_crr -4 --nolog
|
|
sleep 2
|
|
gout LAT tcp_crr --nolog -c -H __GW__ | sed -n 's/^throughput=\(.*\)/\1/p'
|
|
lat __LAT__ 1000 800
|
|
sleep 2
|
|
|
|
nl
|
|
nl
|
|
say Thanks for watching!
|
|
sleep 5
|