tests: Collect build_info from system if available.

This adds a script to always get the /etc/cloud/build.info file
if it exists, and a hook when preparing the image to log the information
if it is available.

INFO - setting up ubuntu-cosmic (build_name=server serial=20180718)

This is just useful for debug and reproduce.

2 files changed, 13 insertions, 1 deletions

diff --git a/tests/cloud_tests/setup_image.py b/tests/cloud_tests/setup_image.py
index 4e195709..39f4517f 100644
--- a/tests/cloud_tests/setup_image.py
+++ b/tests/cloud_tests/setup_image.py
@@ -4,6 +4,7 @@
 
 from functools import partial
 import os
+import yaml
 
 from tests.cloud_tests import LOG
 from tests.cloud_tests import stage, util
@@ -220,7 +221,14 @@ def setup_image(args, image):
     calls = [partial(stage.run_single, desc, partial(func, args, image))
              for name, func, desc in handlers if getattr(args, name, None)]
 
-    LOG.info('setting up %s', image)
+    try:
+        data = yaml.load(image.read_data("/etc/cloud/build.info", decode=True))
+        info = ' '.join(["%s=%s" % (k, data.get(k))
+                         for k in ("build_name", "serial") if k in data])
+    except Exception as e:
+        info = "N/A (%s)" % e
+
+    LOG.info('setting up %s (%s)', image, info)
     res = stage.run_stage(
         'set up for {}'.format(image), calls, continue_after_error=False)
     return res
diff --git a/tests/cloud_tests/testcases.yaml b/tests/cloud_tests/testcases.yaml
index a16d1ddf..fb9a5d27 100644
--- a/tests/cloud_tests/testcases.yaml
+++ b/tests/cloud_tests/testcases.yaml
@@ -27,6 +27,10 @@ base_test_data:
         package-versions: |
             #!/bin/sh
             dpkg-query --show
+        build.info: |
+            #!/bin/sh
+            binfo=/etc/cloud/build.info
+            [ -f "$binfo" ] && cat "$binfo" || echo "N/A"
         system.journal.gz: |
             #!/bin/sh
             [ -d /run/systemd ] || { echo "not systemd."; exit 0; }