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