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: Ie13ecef2958a926933520cceeee6bfb669b94fce
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]
@@ -155,9 +156,17 @@ install_command =
     pip install -U --force-reinstall {opts} {packages}
 
 
+[testenv:func_logs]
+commands =
+    bash -c 'mkdir -p {toxinidir}/logs'
+    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: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
@@ -180,12 +189,16 @@ commands =
                      -e "install_test_packages=True" \
                      -e @{toxinidir}/tests/test-vars.yml \
                      {toxinidir}/tests/test-swift-functional.yml -vvvv
-    bash -c 'mkdir -p {toxinidir}/logs'
+    {[testenv:func_logs]commands}
-    bash -c 'rsync -av --ignore-errors /var/log/ /openstack/log/ {toxinidir}/logs/ || true'
 
 
 # NOTE(andymccr): this will test Swift running in pypy.
 [testenv:func_pypy]
+# Ignore_errors is set to true so that the logs are collected at the
+#  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
 install_command =
     {[testenv:func_base]install_command}
 deps =
@@ -206,12 +219,16 @@ commands =
                      -e @{toxinidir}/tests/test-vars.yml \
                      -e "swift_pypy_enabled=True" \
                      {toxinidir}/tests/test-swift-functional.yml -vvvv
-    bash -c 'mkdir -p {toxinidir}/logs'
+    {[testenv:func_logs]commands}
-    bash -c 'rsync -av --ignore-errors /var/log/ /openstack/log/ {toxinidir}/logs/ || true'
 
 
 # NOTE(andmccr): this will test a MR Swift deploy.
 [testenv:multi_reg]
+# Ignore_errors is set to true so that the logs are collected at the
+#  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
 install_command =
     {[testenv:func_base]install_command}
 deps =
@@ -266,8 +283,7 @@ commands =
                      -e "install_test_packages=True" \
                      -e @{toxinidir}/tests/test-vars-MR-B.yml \
                      {toxinidir}/tests/test-swift-functional.yml -vvvv
-    bash -c 'mkdir -p {toxinidir}/logs'
+    {[testenv:func_logs]commands}
-    bash -c 'rsync -av --ignore-errors /var/log/ /openstack/log/ {toxinidir}/logs/ || true'
 
 
 [testenv:linters]