# Dockerizing a Riak service The goal of this example is to show you how to build a Docker image with Riak pre-installed. ## Creating a Dockerfile Create an empty file called `Dockerfile`: $ touch Dockerfile Next, define the parent image you want to use to build your image on top of. We'll use [Ubuntu](https://registry.hub.docker.com/_/ubuntu/) (tag: `trusty`), which is available on [Docker Hub](https://hub.docker.com): # Riak # # VERSION 0.1.1 # Use the Ubuntu base image provided by dotCloud FROM ubuntu:trusty MAINTAINER Hector Castro hector@basho.com After that, we install the curl which is used to download the repository setup script and we download the setup script and run it. # Install Riak repository before we do apt-get update, so that update happens # in a single step RUN apt-get install -q -y curl && \ curl -fsSL https://packagecloud.io/install/repositories/basho/riak/script.deb | sudo bash Then we install and setup a few dependencies: - `supervisor` is used manage the Riak processes - `riak=2.0.5-1` is the Riak package coded to version 2.0.5 # Install and setup project dependencies RUN apt-get update && \ apt-get install -y supervisor riak=2.0.5-1 RUN mkdir -p /var/log/supervisor RUN locale-gen en_US en_US.UTF-8 COPY supervisord.conf /etc/supervisor/conf.d/supervisord.conf After that, we modify Riak's configuration: # Configure Riak to accept connections from any host RUN sed -i "s|listener.http.internal = 127.0.0.1:8098|listener.http.internal = 0.0.0.0:8098|" /etc/riak/riak.conf RUN sed -i "s|listener.protobuf.internal = 127.0.0.1:8087|listener.protobuf.internal = 0.0.0.0:8087|" /etc/riak/riak.conf Then, we expose the Riak Protocol Buffers and HTTP interfaces: # Expose Riak Protocol Buffers and HTTP interfaces EXPOSE 8087 8098 Finally, run `supervisord` so that Riak is started: CMD ["/usr/bin/supervisord"] ## Create a supervisord configuration file Create an empty file called `supervisord.conf`. Make sure it's at the same directory level as your `Dockerfile`: touch supervisord.conf Populate it with the following program definitions: [supervisord] nodaemon=true [program:riak] command=bash -c "/usr/sbin/riak console" numprocs=1 autostart=true autorestart=true user=riak environment=HOME="/var/lib/riak" stdout_logfile=/var/log/supervisor/%(program_name)s.log stderr_logfile=/var/log/supervisor/%(program_name)s.log ## Build the Docker image for Riak Now you should be able to build a Docker image for Riak: $ docker build -t "/riak" . ## Next steps Riak is a distributed database. Many production deployments consist of [at least five nodes]( http://basho.com/why-your-riak-cluster-should-have-at-least-five-nodes/). See the [docker-riak](https://github.com/hectcastro/docker-riak) project details on how to deploy a Riak cluster using Docker and Pipework.