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Optimize Dockerfile.

Browse Source 
This optimizes the Dockerfile by;

- Combining RUN statements so that files are removed in the
  same layer as they are added.
- Removing the downloaded .tar.gz of the docker-gen binary
  after expanding
- Adding `--no-install-recommends` (but explicitly installing
  ca-certificates)
- Replacing `ADD` with `COPY` (recommended if no unpacking is
  required)

Also added a `.dockerignore` file to prevent the `.git` directory
and README.md being added to the image.

These changes reduce the size of the image with 34 MB (was 268.4 MB,
now 233.9 MB), and results in less layers being produced.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This commit is contained in:
Sebastiaan van Stijn 2014-11-22 19:42:54 +01:00
parent a912287461
commit d68be71a3f
2 changed files with 25 additions and 17 deletions
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2
.dockerignore Normal file
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@ -0,0 +1,2 @@
.git
README.md

40
Dockerfile
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@ -2,28 +2,34 @@ FROM ubuntu:14.04
MAINTAINER Jason Wilder jwilder@litl.com MAINTAINER Jason Wilder jwilder@litl.com
# Install Nginx. # Install Nginx.
RUN echo "deb http://ppa.launchpad.net/nginx/stable/ubuntu trusty main" > /etc/apt/sources.list.d/nginx-stable-trusty.list RUN echo "deb http://ppa.launchpad.net/nginx/stable/ubuntu trusty main" > /etc/apt/sources.list.d/nginx-stable-trusty.list \
RUN echo "deb-src http://ppa.launchpad.net/nginx/stable/ubuntu trusty main" >> /etc/apt/sources.list.d/nginx-stable-trusty.list && echo "deb-src http://ppa.launchpad.net/nginx/stable/ubuntu trusty main" >> /etc/apt/sources.list.d/nginx-stable-trusty.list \
RUN apt-key adv --keyserver keyserver.ubuntu.com --recv-keys C300EE8C && apt-key adv --keyserver keyserver.ubuntu.com --recv-keys C300EE8C \
RUN apt-get update && apt-get update \
RUN apt-get install --only-upgrade bash && apt-get install -y -q --no-install-recommends \
RUN apt-get install -y wget nginx ca-certificates \
nginx \
wget \
&& apt-get clean \
&& rm -r /var/lib/apt/lists/*
RUN echo "daemon off;" >> /etc/nginx/nginx.conf # Configure Nginx and apply fix for long server names
RUN echo "daemon off;" >> /etc/nginx/nginx.conf \
&& sed -i 's/# server_names_hash_bucket/server_names_hash_bucket/g' /etc/nginx/nginx.conf
#fix for long server names # Install Forego
RUN sed -i 's/# server_names_hash_bucket/server_names_hash_bucket/g' /etc/nginx/nginx.conf RUN wget -P /usr/local/bin https://godist.herokuapp.com/projects/ddollar/forego/releases/current/linux-amd64/forego \
&& chmod u+x /usr/local/bin/forego
RUN wget -P /usr/local/bin https://godist.herokuapp.com/projects/ddollar/forego/releases/current/linux-amd64/forego
RUN chmod u+x /usr/local/bin/forego
ENV DOCKER_GEN_VERSION 0.3.4 ENV DOCKER_GEN_VERSION 0.3.4
RUN wget https://github.com/jwilder/docker-gen/releases/download/$DOCKER_GEN_VERSION/docker-gen-linux-amd64-$DOCKER_GEN_VERSION.tar.gz
RUN tar -C /usr/local/bin -xvzf docker-gen-linux-amd64-$DOCKER_GEN_VERSION.tar.gz
RUN mkdir /app RUN wget https://github.com/jwilder/docker-gen/releases/download/$DOCKER_GEN_VERSION/docker-gen-linux-amd64-$DOCKER_GEN_VERSION.tar.gz \
WORKDIR /app && tar -C /usr/local/bin -xvzf docker-gen-linux-amd64-$DOCKER_GEN_VERSION.tar.gz \
ADD . /app && rm /docker-gen-linux-amd64-$DOCKER_GEN_VERSION.tar.gz
COPY . /app/
WORKDIR /app/
EXPOSE 80 EXPOSE 80
ENV DOCKER_HOST unix:///tmp/docker.sock ENV DOCKER_HOST unix:///tmp/docker.sock