mirror of
https://passt.top/passt
synced 2024-07-05 09:15:48 +00:00
ca2749e1bd
In practical terms, passt doesn't benefit from the additional protection offered by the AGPL over the GPL, because it's not suitable to be executed over a computer network. Further, restricting the distribution under the version 3 of the GPL wouldn't provide any practical advantage either, as long as the passt codebase is concerned, and might cause unnecessary compatibility dilemmas. Change licensing terms to the GNU General Public License Version 2, or any later version, with written permission from all current and past contributors, namely: myself, David Gibson, Laine Stump, Andrea Bolognani, Paul Holzinger, Richard W.M. Jones, Chris Kuhn, Florian Weimer, Giuseppe Scrivano, Stefan Hajnoczi, and Vasiliy Ulyanov. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
246 lines
5.7 KiB
Plaintext
246 lines
5.7 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-or-later
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#
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# PASST - Plug A Simple Socket Transport
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# for qemu/UNIX domain socket mode
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#
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# PASTA - Pack A Subtle Tap Abstraction
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# for network namespace/tap device mode
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#
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# test/demo/passt - Quick introduction to passt
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#
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# Copyright (c) 2021 Red Hat GmbH
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# Author: Stefano Brivio <sbrivio@redhat.com>
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say This is a short introduction to
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em passt
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say .
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nl
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nl
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sleep 3
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say Let's fetch the source
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sleep 1
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host cd __STATEDIR__
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host git clone git://passt.top/passt
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sleep 1
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say and build it.
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sleep 1
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host cd passt
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host make
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sleep 1
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nl
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nl
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say A quick look at the man page...
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sleep 1
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hostb man ./passt.1
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sleep 5
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hostb /ports
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sleep 2
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hostb n
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sleep 2
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hostb n
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sleep 10
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nl
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say '-t' to forward TCP ports.
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sleep 3
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host q
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nl
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nl
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say Let's create a small initramfs image for the guest.
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guest cd __STATEDIR__
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guest git clone git://mbuto.sh/mbuto
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guest ./mbuto/mbuto -f passt.img -p passt/test/passt.mbuto -c lz4
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sleep 2
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nl
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nl
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say We want to isolate passt and guest in a
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nl
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say network namespace. For convenience, we'll
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nl
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say create it with 'pasta', see also the
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nl
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say 'pasta' demo above.
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sleep 3
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passt cd __STATEDIR__/passt
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passtb ./pasta -P pasta.pid
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sleep 3
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passt /sbin/dhclient -4 --no-pid
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sleep 2
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passt /sbin/dhclient -6 --no-pid
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sleep 2
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nl
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nl
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say Now let's run 'passt' in the new namespace, and
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nl
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say enter this namespace from the guest terminal too.
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sleep 3
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guest cd passt
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gout TARGET_PID pgrep -P $(cat pasta.pid)
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sleep 1
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passtb ./passt -f -t 10001,10003 -s __STATEDIR__/passt.socket
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sleep 2
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guest nsenter -t __TARGET_PID__ -U -n --preserve-credentials
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sleep 5
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nl
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nl
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say We're ready to start qemu
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nl
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sleep 2
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hout VMLINUZ echo "/boot/vmlinuz-$(uname -r)"
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guest qemu-system-x86_64 -enable-kvm -m 4096 -cpu host -smp 4 -kernel __VMLINUZ__ -initrd ../passt.img -nographic -serial stdio -nodefaults -append "console=ttyS0" -device virtio-net-pci,netdev=s0 -netdev stream,id=s0,server=off,addr.type=unix,addr.path=__STATEDIR__/passt.socket
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sleep 10
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nl
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nl
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guest ip link show
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sleep 3
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say Guest is up. Let's configure IPv4 first...
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sleep 2
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guest ip link set dev eth0 up
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sleep 2
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guest dhclient -4
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sleep 2
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guest ip addr show
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sleep 5
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nl
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say SLAAC is already done, but we can also
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nl
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say get another address via DHCPv6.
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sleep 3
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guest dhclient -6
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sleep 3
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nl
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nl
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say Let's try to communicate between host and guest.
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sleep 2
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guestb socat TCP6-LISTEN:10001 STDIO
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sleep 2
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host echo "Hello from the host" | socat -u STDIN TCP6:[::1]:10001
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sleep 5
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nl
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nl
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say Now the other way around... using
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nl
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say the address of the default gateway.
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sleep 2
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gout GW ip -j -4 route show|jq -rM '.[] | select(.dst == "default").gateway'
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sleep 5
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hostb socat TCP4-LISTEN:31337 STDIO
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sleep 2
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guest echo "Hello from the guest" | socat -u STDIN TCP4:__GW__:31337
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sleep 3
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nl
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nl
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say Let's have a (quick!) look at performance
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nl
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say more in the "Performance" section below.
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sleep 3
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host nsenter -t __TARGET_PID__ -U -n --preserve-credentials
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guest /sbin/sysctl -w net.core.rmem_max=536870912
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guest /sbin/sysctl -w net.core.wmem_max=536870912
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guest /sbin/sysctl -w net.core.rmem_default=33554432
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guest /sbin/sysctl -w net.core.wmem_default=33554432
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guest /sbin/sysctl -w net.ipv4.tcp_rmem="4096 131072 268435456"
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guest /sbin/sysctl -w net.ipv4.tcp_wmem="4096 131072 268435456"
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guest /sbin/sysctl -w net.ipv4.tcp_timestamps=0
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host sysctl -w net.ipv4.tcp_rmem="4096 524288 134217728"
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host sysctl -w net.ipv4.tcp_wmem="4096 524288 134217728"
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host sysctl -w net.ipv4.tcp_timestamps=0
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gout GW6 ip -j -6 route show|jq -rM '.[] | select(.dst == "default").gateway'
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gout IFNAME ip -j link show | jq -rM '.[] | select(.link_type == "ether").ifname'
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nl
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nl
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info Throughput in Gbps, latency in µs
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th flow host>guest guest>host
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set OPTS -P4 -w 64M -l 1M -i1 --pacing-timer 100000
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tr TCP/IPv6 throughput
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hostb sleep 10; iperf3 -c ::1 -p 10001 __OPTS__
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gout BW iperf3 -s1J -p 10001 | jq -rM ".end.sum_received.bits_per_second"
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bw __BW__ 2.0 3.0
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sleep 5
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guestb sleep 10; iperf3 -c __GW6__%__IFNAME__ -p 10002 __OPTS__ -O3
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hout BW iperf3 -s1J -p 10002 | jq -rM ".end.sum_received.bits_per_second"
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bw __BW__ 2.0 3.0
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tl TCP/IPv6 RR latency
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guestb tcp_rr -C 10001 -P 10003 -6 --nolog
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sleep 2
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hout LAT tcp_rr -C 10001 -P 10003 --nolog -c -H ::1 | sed -n 's/^throughput=\(.*\)/\1/p'
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lat __LAT__ 1000 800
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sleep 2
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hostb tcp_rr -6 --nolog
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sleep 2
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gout LAT tcp_rr --nolog -c -H __GW6__%__IFNAME__ | sed -n 's/^throughput=\(.*\)/\1/p'
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lat __LAT__ 1000 800
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sleep 2
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tl TCP/IPv6 CRR latency
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guestb tcp_crr -C 10001 -P 10003 -6 --nolog
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sleep 2
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hout LAT tcp_crr -C 10001 -P 10003 --nolog -c -H ::1 | sed -n 's/^throughput=\(.*\)/\1/p'
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lat __LAT__ 1000 800
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sleep 2
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hostb tcp_crr -6 --nolog
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sleep 2
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gout LAT tcp_crr --nolog -c -H __GW6__%__IFNAME__ | sed -n 's/^throughput=\(.*\)/\1/p'
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lat __LAT__ 1000 800
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sleep 2
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tr TCP/IPv4 throughput
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hostb sleep 10; iperf3 -c 127.0.0.1 -p 10001 __OPTS__
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gout BW iperf3 -p 10001 -s1J | jq -rM ".end.sum_received.bits_per_second"
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bw __BW__ 2.0 3.0
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sleep 5
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guestb sleep 10; iperf3 -c __GW__ -p 10002 __OPTS__ -O3
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hout BW iperf3 -s1J -p 10002 | jq -rM ".end.sum_received.bits_per_second"
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bw __BW__ 2.0 3.0
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tl TCP/IPv4 RR latency
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guestb tcp_rr -C 10001 -P 10003 -4 --nolog
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sleep 2
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hout LAT tcp_rr -C 10001 -P 10003 --nolog -c -H 127.0.0.1 | sed -n 's/^throughput=\(.*\)/\1/p'
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lat __LAT__ 1000 800
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sleep 2
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hostb tcp_rr -4 --nolog
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sleep 2
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gout LAT tcp_rr --nolog -c -H __GW__ | sed -n 's/^throughput=\(.*\)/\1/p'
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lat __LAT__ 1000 800
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sleep 2
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tl TCP/IPv4 CRR latency
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guestb tcp_crr -C 10001 -P 10003 -4 --nolog
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sleep 2
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hout LAT tcp_crr -C 10001 -P 10003 --nolog -c -H 127.0.0.1 | sed -n 's/^throughput=\(.*\)/\1/p'
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lat __LAT__ 1000 800
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sleep 2
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hostb tcp_crr -4 --nolog
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sleep 2
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gout LAT tcp_crr --nolog -c -H __GW__ | sed -n 's/^throughput=\(.*\)/\1/p'
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lat __LAT__ 1000 800
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sleep 2
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nl
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nl
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say Thanks for watching!
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sleep 5
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