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Make some VMs assets and output unique and allow some parallel execution #4399

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585d3e4
QEMU VMs: make seabios log files easier to correlate
clebergnu Aug 5, 2026
c1036f7
QEMU VMs: make cloned images unique
clebergnu Aug 5, 2026
442a284
Docs: add short section on how to run some tests in parallel
clebergnu Aug 5, 2026
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29 changes: 29 additions & 0 deletions docs/source/GetStartedGuide.rst
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Expand Up @@ -166,6 +166,35 @@ Now let's run a virt test::
If you have trouble executing the steps provided in this guide, you have a few
options:

Running tests in parallel
=========================

Avocado itself has supported running tests in parallel for a long time, but due
to the nature of VT tests, this is not common practice. Still, some tests can
run in parallel with a few extra options set.

This takes into consideration tp-qemu tests. A command line such as the
following demonstrates that::

$ avocado run --max-parallel-tasks=2 --vt-extra-params 'master_images_clone=vm1' --vt-extra-params='remove_image_image1=yes' --vt-extra-params='backup_image_before_testing=no' --vt-extra-params='display=nographic' -- boot boot
JOB ID : <id>
JOB LOG : /home/<user>/avocado/job-results/job-2026-08-04T22.13-a336310/job.log
(2/2) io-github-autotest-qemu.boot: STARTED
(1/2) io-github-autotest-qemu.boot: STARTED
(2/2) io-github-autotest-qemu.boot: PASS (32.79 s)
(1/2) io-github-autotest-qemu.boot: PASS (32.82 s)
RESULTS : PASS 2 | ERROR 0 | FAIL 0 | SKIP 0 | WARN 0 | INTERRUPT 0 | CANCEL 0
JOB TIME : 36.15 s

Notice how the job run time and each test's individual time are very close.

This assumes a guest image has already been prepared (either a JeOS
image downloaded as part of the ``vt-bootstrap`` execution) or an
unattended install test has been run.

Please use this "parallelization support" with a grain of salt, given
that it's highly test dependent.

* For in-depth information, or to ask questions, please consult the `deepwiki <https://deepwiki.com/avocado-framework/avocado-vt>`__.
* Send an e-mail to `the avocado mailing list <https://www.redhat.com/mailman/listinfo/avocado-devel>`__.
* Open an issue on `the avocado-vt github area <https://github.com/avocado-framework/avocado-vt/issues/new>`__.
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3 changes: 2 additions & 1 deletion virttest/qemu_vm.py
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Expand Up @@ -3984,7 +3984,8 @@ def create(

for key, value in list(self.logs.items()):
outfile = os.path.join(
utils_logfile.get_log_file_dir(), "%s-%s.log" % (key, name)
utils_logfile.get_log_file_dir(),
"%s-%s-pid-%s.log" % (key, name, self.get_pid()),

@kraxel kraxel Aug 6, 2026

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While being at it can we also s/seabios/firmware/ ?

)
self.logsessions[key] = aexpect.Tail(
"nc -U %s" % value,
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3 changes: 2 additions & 1 deletion virttest/storage.py
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Expand Up @@ -1210,7 +1210,8 @@ def clone_image(params, vm_name, image_name, root_dir):
if not params.get("image_name_%s_%s" % (image_name, vm_name)):
m_image_name = params.get("image_name", "image")
vm_image_name = params.get(
"image_name_%s" % vm_name, "%s_%s" % (m_image_name, vm_name)
"image_name_%s" % vm_name,
"%s_%s" % (m_image_name, f"{vm_name}-pid-{os.getpid()}"),
)
if params.get("clone_master", "yes") == "yes":
image_params = params.object_params(image_name)
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