Dockerfiles for collectd Container

Collectd-ceilometer-plugin is essential for further
more detailed metrics collection, smarter scheduling and service
assurance.

Change-Id: I3a926d9bee592a9bff31a90fa1ffeb0a58f5025a
Partially-Implements: blueprint collectd-ceilometer-plugin

docker/collectd/Dockerfile.j2

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+FROM {{ namespace }}/{{ image_prefix }}openstack-base:{{ tag }}
+MAINTAINER {{ maintainer }}
+
+{% import "macros.j2" as macros with context %}
+
+{% set collectd_packages = ['collectd'] %}
+
+{{ macros.install_packages(collectd_packages | customizable("packages")) }}
+
+COPY collectd_sudoers /etc/sudoers.d/kolla_collectd_sudoers
+COPY extend_start.sh /usr/local/bin/kolla_extend_start
+
+RUN useradd -r -m --user-group collectd \
+    && chmod 755 /usr/local/bin/kolla_extend_start \
+    && chmod 750 /etc/sudoers.d \
+    && chmod 440 /etc/sudoers.d/kolla_collectd_sudoers \
+    && usermod -a -G kolla collectd
+
+{% block collectd_footer %}{% endblock %}
+{{ include_footer }}
+
+USER collectd

docker/collectd/collectd_sudoers

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+%kolla ALL=(root) NOPASSWD: /bin/chown collectd\: /var/lib/collectd/, /usr/bin/chown collectd\: /var/lib/collectd/

docker/collectd/extend_start.sh

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+#!/bin/bash
+
+# Only update permissions if permissions need to be updated
+if [[ $(stat -c %U:%G /var/lib/collectd) != "collectd:collectd" ]]; then
+    sudo chown collectd: /var/lib/collectd
+fi