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: I5eb6b16deaf3e0b01d46dae86ee40b1f8e90581d
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]