This blog is publish with a docker image with GitLab. But I don’t like the image I was using because wasn’t update and it’s big and havy. So I fork the project for create an update version for my personal blog.
So I started with updating the old docker image I was using this image
FROM debian:wheezy
MAINTAINER [email protected]
# Install pygments (for syntax highlighting)
RUN apt-get -qq update \
&& DEBIAN_FRONTEND=noninteractive apt-get -qq install -y --no-install-recommends python-pygments git ca-certificates \
&& rm -rf /var/lib/apt/lists/*
# Download and install hugo
ENV HUGO_VERSION 0.20.6
ENV HUGO_BINARY hugo_${HUGO_VERSION}-64bit.deb
ADD https://github.com/spf13/hugo/releases/download/v${HUGO_VERSION}/${HUGO_BINARY} /tmp/hugo.deb
RUN dpkg -i /tmp/hugo.deb \
&& rm /tmp/hugo.deb
# Create working directory
RUN mkdir /usr/share/blog
WORKDIR /usr/share/blog
# Expose default hugo port
EXPOSE 1313
# Automatically build site
ONBUILD ADD site/ /usr/share/blog
ONBUILD RUN hugo -d /usr/share/nginx/html/
# By default, serve site
ENV HUGO_BASE_URL http://localhost:1313
CMD hugo server -b ${HUGO_BASE_URL} --bind=0.0.0.0So I build an image of this container and it was 171 MB in my machine.
But I can do better than this because i can use alpine in the place of debian:wheezy.
I do this because the image for debian is bigger than the image for alpine. But if I will use alpine I need to change somethings because I can’t install .deb into the image. So i use the binary of Hugo for Linux find on Github. And install it on the image
FROM alpine
LABEL maintainer "[email protected]"
# Download and install hugo
ENV HUGO_VERSION 0.20.6
ENV HUGO_DIRECTORY hugo_${HUGO_VERSION}_Linux-64bit
ENV HUGO_BINARY ${HUGO_DIRECTORY}.tar.gz
# Install HUGO
RUN set -x
RUN apk add --update wget ca-certificates
RUN wget https://github.com/spf13/hugo/releases/download/v${HUGO_VERSION}/${HUGO_BINARY}
RUN tar xzf ${HUGO_BINARY}
RUN rm -r ${HUGO_BINARY}
RUN mv hugo /usr/bin/hugo
RUN rm -r LICENSE.md
RUN rm -r README.md
RUN apk del wget ca-certificates
RUN rm /var/cache/apk/*
# Create working directory
RUN mkdir /usr/share/blog
WORKDIR /usr/share/blog
# Expose default hugo port
EXPOSE 1313
# Automatically build site
ONBUILD ADD site/ /usr/share/blog
ONBUILD RUN hugo -d /usr/share/nginx/html/
# By default, serve site
ENV HUGO_BASE_URL http://localhost:1313
CMD hugo server -b ${HUGO_BASE_URL} --bind=0.0.0.0This time the size was 33,5 MB. Good but i can do BETTER.
Whenever you wrote a new line with RUN you make the “compiled” into another layer so, if you have 22 command (like me) you have 22 layer for the image
FROM alpine
LABEL maintainer "[email protected]"
# Download and install hugo
ENV HUGO_VERSION 0.20.6
ENV HUGO_DIRECTORY hugo_${HUGO_VERSION}_Linux-64bit
ENV HUGO_BINARY ${HUGO_DIRECTORY}.tar.gz
# Install HUGO
RUN set -x && \
apk add --update wget ca-certificates && \
wget https://github.com/spf13/hugo/releases/download/v${HUGO_VERSION}/${HUGO_BINARY} && \
tar xzf ${HUGO_BINARY} && \
rm -r ${HUGO_BINARY} && \
mv hugo /usr/bin/hugo && \
rm -r LICENSE.md && \
rm -r README.md && \
apk del wget ca-certificates && \
rm /var/cache/apk/*
# Create working directory
RUN mkdir /usr/share/blog
WORKDIR /usr/share/blog
# Expose default hugo port
EXPOSE 1313
# Automatically build site
ONBUILD ADD site/ /usr/share/blog
ONBUILD RUN hugo -d /usr/share/nginx/html/
# By default, serve site
ENV HUGO_BASE_URL http://localhost:1313
CMD hugo server -b ${HUGO_BASE_URL} --bind=0.0.0.0Size 3,99 MB in this case.
The maggior part of the total size is caused by the size of the Hugo binary itself so I cann’t make an image lighter than the binary.
Now the image size and number layers can change update after update so I put this image with the allwayes data about the images.
