Re: [PATCH 2/2] CI: Check save/restore of PV domain as part of qemu-alpine-x86_64

[Frediano Ziglio <freddy77@xxxxxxxxx>]

On Tue, 4 Aug 2026 at 18:57, Marek Marczykowski-Górecki
<marmarek@xxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> On Tue, Aug 04, 2026 at 06:42:18PM +0100, Frediano Ziglio wrote:
> > Make sure that save/restore continue to work.
> > The check save and restore twice to check for corrupted status.
> > Also a command is launched in the guest to make sure that the
> > machine is not crashed but working.
> >
> > Signed-off-by: Frediano Ziglio <frediano.ziglio@xxxxxxxxxx>
> > ---
> >  automation/scripts/console.exp           |  8 +++++
> >  automation/scripts/qemu-alpine-x86_64.sh | 40 ++++++++++++++++++++++--
> >  2 files changed, 46 insertions(+), 2 deletions(-)
> >
> > diff --git a/automation/scripts/console.exp b/automation/scripts/console.exp
> > index e27886bbef..ff58ed29b8 100755
> > --- a/automation/scripts/console.exp
> > +++ b/automation/scripts/console.exp
> > @@ -58,6 +58,14 @@ if {[info exists env(WAKEUP_CMD)]} {
> >      system "$env(WAKEUP_CMD)"
> >  }
> >
> > +if {[info exists env(EXPECT_TEXTS)]} {
> > +    set lines [split "$env(EXPECT_TEXTS)" "\n"]
> > +    foreach {exp snd} $lines {
> > +        expect -re "$exp"
> > +        send "$snd\n"
> > +    }
> > +}
> > +
> >  if {[info exists env(LOG_MSG)]} {
> >      expect {
> >          -notransfer -re "$env(PASSED)" {
> > diff --git a/automation/scripts/qemu-alpine-x86_64.sh 
> > b/automation/scripts/qemu-alpine-x86_64.sh
> > index 60f5cc49fc..409a601c34 100755
> > --- a/automation/scripts/qemu-alpine-x86_64.sh
> > +++ b/automation/scripts/qemu-alpine-x86_64.sh
> > @@ -48,6 +48,28 @@ xl -vvv create -c /root/domU.cfg
> >
> >  " > etc/local.d/xen.start
> >  chmod +x etc/local.d/xen.start
> > +
> > +# Script to test save and restore.
> > +# It saves and restores domU domain twice to check if the domain was 
> > corrupted
> > +# during the first sequence.
> > +# At the end open the console to check if the domain is working.
> > +cat > root/save_restore_test << "EOF"
> > +#!/bin/sh
> > +set -ex
> > +xl list | grep -q domU
> > +rm -f save.dat
> > +xl save "$(xl list | awk '$1=="domU" { print $2 }')" save.dat 
> > /root/domU.cfg
> > +xl restore /root/domU.cfg save.dat
> > +xl list | grep -q domU
> > +rm -f save.dat
> > +xl save "$(xl list | awk '$1=="domU" { print $2 }')" save.dat 
> > /root/domU.cfg
> > +xl restore /root/domU.cfg save.dat
> > +xl list | grep -q domU
> > +rm -f save.dat
> > +xl console "$(xl list | awk '$1=="domU" { print $2 }')"
> > +EOF
> > +chmod +x root/save_restore_test
> > +
> >  find . | cpio -R 0:0 -H newc -o | gzip >> ../dom0-rootfs.cpio.gz
> >  cd ../..
> >
> > @@ -70,9 +92,23 @@ export TEST_CMD="qemu-system-x86_64 \
> >      -device virtio-net-pci,netdev=n0 \
> >      -netdev user,id=n0,tftp=binaries,bootfile=/pxelinux.0"
> >
> > +# Sequence of expect/send strings:
> > +# 1. wait domain start and close console;
> > +# 2. wait login prompt and login as root
> > +# 3. wait login and launch save/restore test;
> > +# 4. wait restore from domain console and send a command.
>
> Why doing this interactively over serial, instead of adding to
> etc/local.d/xen.start and then printing test result at the end?
>

I'm using expect to interact with the console. expect is not available
inside the alpine root filesystem.
Some failure I had during migration is that the VM crashed. In the
script I interact with the console to check that the VM is still able
to run commands.

> > +gs=$'\x1d'
> > +export EXPECT_TEXTS="BusyBox
> > +$gs $gs
> > +login:
> > +root
> > +login on
> > +/root/save_restore_test
> > +Restarting tasks
> > +dmesg | grep suspending | tr o 0"
> > +
> >  export TEST_LOG="smoke.serial"
> >  export BOOT_MSG="Latest ChangeSet: "
> > -export LOG_MSG="Domain-0"
> > -export PASSED="BusyBox"
> > +export PASSED="suspending xenst0re"
> >
> >  ./automation/scripts/console.exp |& sed 's/\r\+$//'
> > --
> > 2.43.0
> >
>
> --
> Best Regards,
> Marek Marczykowski-Górecki
> Invisible Things Lab