Add rsyslog image

This adds a basic rsyslog image with TLS support. For CentOS, we need to
specify the addition of the log normalizer and json parsing modules;
this is not necessary for debian based systems as they're part of the
base rsyslog package.

Change-Id: Ic40cbdaa182fa664c2329e0336259566307165d4

docker/rsyslog/Dockerfile.j2

@@ -0,0 +1,25 @@
+FROM {{ namespace }}/{{ image_prefix }}base:{{ tag }}
+LABEL maintainer="{{ maintainer }}" name="{{ image_name }}" build-date="{{ build_date }}"
+
+{% block rsyslog_header %}{% endblock %}
+
+{% import "macros.j2" as macros with context %}
+
+{% if base_distro in ['centos', 'oraclelinux', 'rhel'] %}
+    {% set rsyslog_packages = [
+            'rsyslog',
+            'rsyslog-gnutls',
+            'rsyslog-mmjsonparse',
+            'rsyslog-mmnormalize',
+    ] %}
+{% elif base_distro in ['debian', 'ubuntu'] %}
+    {% set rsyslog_packages = [
+            'rsyslog',
+            'rsyslog-gnutls',
+    ] %}
+{% endif %}
+
+{{ macros.install_packages(rsyslog_packages | customizable("packages")) }}
+
+{% block rsyslog_footer %}{% endblock %}
+{% block footer %}{% endblock %}

kolla/common/config.py

@@ -74,6 +74,7 @@ _PROFILE_OPTS = [
                     'qdrouterd',
                     'rabbitmq',
                     'redis',
+                    'rsyslog',
                     'skydive',
                     'tgtd',
                 ],

releasenotes/notes/rsyslog-13d5798163953322.yaml

@@ -0,0 +1,4 @@
+---
+features:
+  - |
+    Add Rsyslog image.