Compress test execution logs

The volume of logs we collect in CI jobs are extensive. This
patch ensures that the logs collected are compressed to reduce
the space taken in CI systems.

PYTHONUNBUFFERED is also set to ensure that the console log
from the CI jobs is recorded in the exact order of execution.

Change-Id: Ia8a9f927a6c86c5a1fca4faf4c08f57df334674e
Related-Bug: #1620849

bindep.txt

@@ -36,3 +36,6 @@ python-ndg-httpsclient      [platform:ubuntu !platform:ubuntu-trusty]
 python2-pyasn1              [platform:rpm]
 pyOpenSSL                   [platform:rpm]
 python-ndg_httpsclient      [platform:rpm]
+
+# Required for compressing collected log files in CI
+gzip

tox.ini

@@ -27,6 +27,7 @@ whitelist_externals =
     wget
 setenv =
     VIRTUAL_ENV={envdir}
+    PYTHONUNBUFFERED=1
 
 
 [testenv:docs]
@@ -146,7 +147,7 @@ commands =
 
 [testenv:functional]
 # Ignore_errors is set to true so that the logs are collected at the
-#  end of the run. This will not produce a failse positive. Any
+#  end of the run. This will not produce a false positive. Any
 #  exception will be mark the run as failed and exit 1 after all of
 #  the commands have been iterated through.
 ignore_errors = True
@@ -166,8 +167,9 @@ commands =
                      -e "install_test_packages=True" \
                      {toxinidir}/tests/test.yml -vvvv
     bash -c 'mkdir -p {toxinidir}/logs'
-    bash -c 'rsync -av --ignore-errors /var/log/ /openstack/log/ {toxinidir}/logs/ || true'
+    bash -c 'rsync --archive --verbose --ignore-errors /var/log/ /openstack/log/ {toxinidir}/logs/ || true'
-
+    bash -c 'find "{toxinidir}/logs/" -type f | sed "p;s|$|.txt|" | xargs -n2 mv'
+    bash -c 'command gzip --best --recursive "{toxinidir}/logs/"'
 
 
 [testenv:linters]