发布于 2015-09-10 16:23:49 | 231 次阅读 | 评论: 0 | 来源: 网络整理
注解
The goal of this example is to show you how to build a Docker image with Riak pre-installed.
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 (tag: latest), which is available on the docker index:
# Riak
#
# VERSION 0.1.0
# Use the Ubuntu base image provided by dotCloud
FROM ubuntu:latest
MAINTAINER Hector Castro hector@basho.com
Next, we update the APT cache and apply any updates:
# Update the APT cache
RUN sed -i.bak 's/main$/main universe/' /etc/apt/sources.list
RUN apt-get update
RUN apt-get upgrade -y
After that, we install and setup a few dependencies:
# Install and setup project dependencies
RUN apt-get install -y curl lsb-release supervisor openssh-server
RUN mkdir -p /var/run/sshd
RUN mkdir -p /var/log/supervisor
RUN locale-gen en_US en_US.UTF-8
ADD supervisord.conf /etc/supervisor/conf.d/supervisord.conf
RUN echo 'root:basho' | chpasswd
Next, we add Basho’s APT repository:
RUN curl -s http://apt.basho.com/gpg/basho.apt.key | apt-key add --
RUN echo "deb http://apt.basho.com $(lsb_release -cs) main" > /etc/apt/sources.list.d/basho.list
RUN apt-get update
After that, we install Riak and alter a few defaults:
# Install Riak and prepare it to run
RUN apt-get install -y riak
RUN sed -i.bak 's/127.0.0.1/0.0.0.0/' /etc/riak/app.config
RUN echo "ulimit -n 4096" >> /etc/default/riak
Almost there. Next, we add a hack to get us by the lack of initctl:
# Hack for initctl
# See: https://github.com/dotcloud/docker/issues/1024
RUN dpkg-divert --local --rename --add /sbin/initctl
RUN ln -s /bin/true /sbin/initctl
Then, we expose the Riak Protocol Buffers and HTTP interfaces, along with SSH:
# Expose Riak Protocol Buffers and HTTP interfaces, along with SSH
EXPOSE 8087 8098 22
Finally, run supervisord so that Riak and OpenSSH are started:
CMD ["/usr/bin/supervisord"]
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:sshd]
command=/usr/sbin/sshd -D
stdout_logfile=/var/log/supervisor/%(program_name)s.log
stderr_logfile=/var/log/supervisor/%(program_name)s.log
autorestart=true
[program:riak]
command=bash -c ". /etc/default/riak && /usr/sbin/riak console"
pidfile=/var/log/riak/riak.pid
stdout_logfile=/var/log/supervisor/%(program_name)s.log
stderr_logfile=/var/log/supervisor/%(program_name)s.log
Now you should be able to build a Docker image for Riak:
docker build -t "<yourname>/riak" .
Riak is a distributed database. Many production deployments consist of at least five nodes. See the docker-riak project details on how to deploy a Riak cluster using Docker and Pipework.