Merge pull request #367 from johncosta/333-redis-documentation

Add documentation for running a redis process with docker

docs/sources/examples/index.rst

@@ -16,4 +16,5 @@ Contents:
    hello_world
    hello_world_daemon
    python_web_app
+   running_redis_service
    running_ssh_service

docs/sources/examples/running_redis_service.rst

@@ -0,0 +1,81 @@
+:title: Running a Redis service
+:description: Installing and running an redis service
+:keywords: docker, example, package installation, networking, redis
+
+.. _running_redis_service:
+
+Create a redis service
+======================
+
+.. include:: example_header.inc
+
+Very simple, no frills, redis service.
+
+Open a docker container
+-----------------------
+
+.. code-block:: bash
+
+    docker run -i -t base /bin/bash
+
+Building your image
+-------------------
+
+Update your docker container, install the redis server.  Once installed, exit out of docker.
+
+.. code-block:: bash
+
+    apt-get update
+    apt-get install redis-server
+    exit
+
+Snapshot the installation
+-------------------------
+
+.. code-block:: bash
+
+    docker ps -a  # grab the container id (this will be the last one in the list)
+    docker commit <container_id> <your username>/redis
+
+Run the service
+---------------
+
+Running the service with `-d` runs the container in detached mode, leaving the
+container running in the background. Use your snapshot.
+
+.. code-block:: bash
+
+    docker run -d -p 6379 <your username>/redis /usr/bin/redis-server
+
+Test 1
+++++++
+
+Connect to the container with the redis-cli.
+
+.. code-block:: bash
+
+    docker ps  # grab the new container id
+    docker inspect <container_id>    # grab the ipaddress of the container
+    redis-cli -h <ipaddress> -p 6379
+    redis 10.0.3.32:6379> set docker awesome
+    OK
+    redis 10.0.3.32:6379> get docker
+    "awesome"
+    redis 10.0.3.32:6379> exit
+
+Test 2
+++++++
+
+Connect to the host os with the redis-cli.
+
+.. code-block:: bash
+
+    docker ps  # grab the new container id
+    docker port <container_id> 6379  # grab the external port
+    ifconfig   # grab the host ip address
+    redis-cli -h <host ipaddress> -p <external port>
+    redis 192.168.0.1:49153> set docker awesome
+    OK
+    redis 192.168.0.1:49153> get docker
+    "awesome"
+    redis 192.168.0.1:49153> exit