Add certmonger container

Certmonger is a daemon that handles the lifecycle of TLS certificates.
This adds a simple container with certmonger installed.

Change-Id: I94af686d73e5d58c2dc020f97edf69e165e26b73

docker/certmonger/Dockerfile.j2

@@ -0,0 +1,21 @@
+FROM {{ namespace }}/{{ image_prefix }}base:{{ tag }}
+LABEL maintainer="{{ maintainer }}" name="{{ image_name }}" build-date="{{ build_date }}"
+
+{% block certmonger_header %}{% endblock %}
+
+{% import "macros.j2" as macros with context %}
+
+{% if base_distro in ['centos', 'oraclelinux', 'rhel'] %}
+    {% set certmonger_packages = [
+            'certmonger',
+    ] %}
+{% elif base_distro in ['debian', 'ubuntu'] %}
+    {% set certmonger_packages = [
+            'certmonger'
+    ] %}
+{% endif %}
+
+{{ macros.install_packages(certmonger_packages | customizable("packages")) }}
+
+{% block certmonger_footer %}{% endblock %}
+{% block footer %}{% endblock %}

kolla/common/config.py

@@ -57,6 +57,7 @@ _PROFILE_OPTS = [
     cfg.ListOpt('infra',
                 default=[
                     'ceph',
+                    'certmonger',
                     'cron',
                     'elasticsearch',
                     'etcd',

releasenotes/notes/add-certmonger-0bf3a37089c5c267.yaml

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