Add Redis Sentinel

Introduce base container for redis

Rebase the existing redis container on the new base container

Provide a container for redis-sentinel to create a highly available cluster

Change-Id: I683f02930a870c01dbc71c84060a65c72a8e568e

docker/redis/redis-base/Dockerfile.j2

@@ -0,0 +1,13 @@
+FROM {{ namespace }}/{{ image_prefix }}base:{{ tag }}
+LABEL maintainer="{{ maintainer }}" name="{{ image_name }}" build-date="{{ build_date }}"
+
+{% block redis_base_header %}{% endblock %}
+
+{% import "macros.j2" as macros with context %}
+
+{{ macros.configure_user(name='redis', homedir='/run/redis') }}
+
+COPY extend_start.sh /usr/local/bin/kolla_extend_start
+RUN chmod 755 /usr/local/bin/kolla_extend_start
+
+{% block redis_base_footer %}{% endblock %}

docker/redis/redis-base/extend_start.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+if [[ ! -d "/var/log/kolla/redis" ]]; then
+    mkdir -p /var/log/kolla/redis
+fi
+
+if [[ $(stat -c %a /var/log/kolla/redis) != "755" ]]; then
+    chmod 755 /var/log/kolla/redis
+fi

docker/redis/redis-sentinel/Dockerfile.j2

@@ -0,0 +1,18 @@
+FROM {{ namespace }}/{{ image_prefix }}redis-base:{{ tag }}
+LABEL maintainer="{{ maintainer }}" name="{{ image_name }}" build-date="{{ build_date }}"
+
+{% block redis_sentinel_header %}{% endblock %}
+
+{% import "macros.j2" as macros with context %}
+
+{% if base_distro in ['centos', 'oraclelinux', 'rhel'] %}
+    {% set redis_sentinel_packages = ['redis'] %}
+{% elif base_distro in ['debian', 'ubuntu'] %}
+    {% set redis_sentinel_packages = ['redis-sentinel'] %}
+{% endif %}
+{{ macros.install_packages(redis_sentinel_packages | customizable("packages")) }}
+
+{% block redis_sentinel_footer %}{% endblock %}
+{% block footer %}{% endblock %}
+
+USER redis

docker/redis/redis/Dockerfile.j2

@@ -1,12 +1,10 @@
-FROM {{ namespace }}/{{ image_prefix }}base:{{ tag }}
+FROM {{ namespace }}/{{ image_prefix }}redis-base:{{ tag }}
 LABEL maintainer="{{ maintainer }}" name="{{ image_name }}" build-date="{{ build_date }}"
 
 {% block redis_header %}{% endblock %}
 
 {% import "macros.j2" as macros with context %}
 
-{{ macros.configure_user(name='redis', homedir='/run/redis') }}
-
 {% if base_distro in ['centos', 'oraclelinux', 'rhel'] %}
     {% set redis_packages = ['redis'] %}
 {% elif base_distro in ['debian', 'ubuntu'] %}

releasenotes/notes/redis-sentinel-container-defa09d0ac420f64.yaml

@@ -0,0 +1,3 @@
+---
+features:
+    - Add a redis-sentinel image to deploy highly available redis clusters