Re: [Autotest] [KVM-AUTOTEST PATCH 3/4] kvm_guest_wizard: allow keeping screendump history for debugging purposes

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----- "Lucas Meneghel Rodrigues" <lmr@xxxxxxxxxx> wrote:

> On Mon, 2009-06-15 at 22:45 +0300, Michael Goldish wrote:
> > Add two new step file test parameters:
> > - keep_screendump_history: if equals 'yes', screendump history is
> saved in
> >   test.debugdir/barrier_history in JPG format.  Each screendump
> taken by the
> >   test is saved if it differs from the previous screendump.  By
> default, when
> >   a barrier succeeds all history is removed, so eventually the
> remaining files
> >   are only those of the (last) failed barrier, if any.
> > - keep_all_history: if equals 'yes', screendump history is not
> removed upon
> >   barrier success.  The test leaves behind all the collected
> screendump history.
> > 
> > Signed-off-by: Michael Goldish <mgoldish@xxxxxxxxxx>
> > ---
> >  client/tests/kvm/kvm_guest_wizard.py |   38
> ++++++++++++++++++++++++++++-----
> >  1 files changed, 32 insertions(+), 6 deletions(-)
> > 
> > diff --git a/client/tests/kvm/kvm_guest_wizard.py
> b/client/tests/kvm/kvm_guest_wizard.py
> > index eb0e2d5..73b830e 100644
> > --- a/client/tests/kvm/kvm_guest_wizard.py
> > +++ b/client/tests/kvm/kvm_guest_wizard.py
> > @@ -1,6 +1,6 @@
> >  import os, time, md5, re, shutil, logging
> >  from autotest_lib.client.common_lib import utils, error
> > -import kvm_utils, ppm_utils
> > +import kvm_utils, ppm_utils, kvm_subprocess
> 
> I see, it depends on kvm subprocess, so I will apply this patch after
> the kvm subprocess patch is applied.
> 
> >  """
> >  Utilities to perform automatic guest installation using step
> files.
> > @@ -53,6 +53,11 @@ def barrier_2(vm, words, params, debug_dir,
> data_scrdump_filename,
> >      else:
> >          stuck_detection_history = 2
> >  
> > +    keep_screendump_history = params.get("keep_screendump_history")
> == "yes"
> > +    if keep_screendump_history:
> > +        keep_all_history = params.get("keep_all_history") == "yes"
> > +        history_dir = os.path.join(debug_dir, "barrier_history")
> > +
> 
> Here I also think that we should check for the presence of
> ImageMagick to avoid failing the test out of necessity.

Again, the test won't fail as long as kvm_subprocess doesn't raise exceptions.
It'll just display bash's "command not found" response in debug messages with
a "(convert) " prefix.

> >      end_time = time.time() + timeout
> >      end_time_stuck = time.time() + fail_if_stuck_for
> >      start_time = time.time()
> > @@ -91,21 +96,42 @@ def barrier_2(vm, words, params, debug_dir,
> data_scrdump_filename,
> >          # Read image file
> >          (w, h, data) =
> ppm_utils.image_read_from_ppm_file(scrdump_filename)
> >  
> > +        # Compute md5sum of whole image
> > +        whole_image_md5sum = ppm_utils.image_md5sum(w, h, data)
> > +
> > +        # Write screendump to history_dir (as JPG) if requested
> > +        # and if the screendump differs from the previous one
> > +        if (keep_screendump_history and
> > +            whole_image_md5sum not in
> prev_whole_image_md5sums[:1]):
> > +            try:
> > +                os.makedirs(history_dir)
> > +            except:
> > +                pass
> > +            history_scrdump_filename = os.path.join(history_dir,
> > +                    "scrdump-step_%s-%s.jpg" % (current_step_num,
> > +                                               
> time.strftime("%Y%m%d-%H%M%S")))
> > +            kvm_subprocess.run_fg("convert -quality 30 %s %s" %
> > +                                  (scrdump_filename,
> history_scrdump_filename),
> > +                                  logging.debug, "(convert) ",
> timeout=30)
> > +
> >          # Compare md5sum of barrier region with the expected
> md5sum
> >          calced_md5sum = ppm_utils.get_region_md5sum(w, h, data, x1,
> y1, dx, dy,
> >                                                     
> cropped_scrdump_filename)
> >          if calced_md5sum == md5sum:
> > +            # Success -- remove screendump history unless requested
> not to
> > +            if keep_screendump_history and not keep_all_history:
> > +                kvm_subprocess.run_fg("rm -rvf %s" % history_dir,
> > +                                      logging.debug, "(rm) ",
> timeout=30)
> > +            # Report success
> >              return True
> >  
> > -        # Compute md5sum of whole image in order to compare it
> with
> > -        # previous ones
> > -        whole_image_md5sum = ppm_utils.image_md5sum(w, h, data)
> > +        # Insert image md5sum into queue of last seen images:
> >          # If md5sum is already in queue...
> >          if whole_image_md5sum in prev_whole_image_md5sums:
> >              # Remove md5sum from queue
> >              prev_whole_image_md5sums.remove(whole_image_md5sum)
> >          else:
> > -            # Extend 'stuck' timeout
> > +            # Otherwise extend 'stuck' timeout
> >              end_time_stuck = time.time() + fail_if_stuck_for
> >          # Insert md5sum at beginning of queue
> >          prev_whole_image_md5sums.insert(0, whole_image_md5sum)
> > @@ -129,7 +155,7 @@ def barrier_2(vm, words, params, debug_dir,
> data_scrdump_filename,
> >          if data_scrdump_filename and
> os.path.exists(data_scrdump_filename):
> >              # Read expected screendump image
> >              (ew, eh, edata) = \
> > -           
> ppm_utils.image_read_from_ppm_file(data_scrdump_filename)
> > +                   
> ppm_utils.image_read_from_ppm_file(data_scrdump_filename)
> >              # Write it in debug_dir
> >             
> ppm_utils.image_write_to_ppm_file(expected_scrdump_filename,
> >                                                ew, eh, edata)
> -- 
> Lucas Meneghel Rodrigues
> Software Engineer (QE)
> Red Hat - Emerging Technologies
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