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passt/test/demo/passt
David Gibson a832a44e67 tests: Explicitly list test files in test/run, remove "onlyfor" support 
Currently test/run uses wildcards to run all of the tests in a directory.
However, that wildcard list is filtered down by the "onlyfor" directives
in the test files... usually to a single file.

Therefore, just explicitly list the files we *really* want to run for this
test mode.  This makes it easier to see at the top level what tests will
be executed, and to change that list temporarily while debugging specific
failures.

This means the "onlyfor" directive no longer has any purpose, and we can
remove it.  "onlyfor" was also the only used of the $MODE variable, so we
can remove that too.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2022-07-14 01:32:42 +02:00

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# 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
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
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