Dockerfile for agate

• Tuesday, February 9, 2021

Background

My domain runs on a Linode server. To try to make my life a little easier, I've standardized on running all my services in Docker containers (whether this actually makes my life easier or not is up for debate). Since I wanted to run an agate server, too, I decided to put together a little Docker container to help me.

Generating Certificates

You'll need to generate your own key and cert, and keep them in the same file as the Dockerfile when you build your container. The quickest way is to do:

openssl req -x509 -newkey rsa:4096 -keyout key.rsa -out cert.pem \
    -days 3650 -nodes -subj "/CN=example.com"

Just replace example.com with the correct domain name!

Building the Container

Stick the key.rsa, cert.pem, and Dockerfile into the same directory, and then build with:

docker build --rm --tag agate:latest .

Running the Container

To run this, you'd do something like:

docker run -d -v /your/gemini/files:/var/gemini -p 1965:1965 --rm agate:latest

Here, /your/gemini/files is where you store your actual content.

The Dockerfile

FROM alpine:3.13

RUN apk update
RUN apk add --no-cache openssl-dev curl git build-base openssl-dev

RUN mkdir -p /etc/agate

COPY key.rsa /etc/agate/key.rsa
COPY cert.pem /etc/agate/cert.pem

RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y

RUN git clone https://github.com/mbrubeck/agate.git /tmp/agate

RUN mkdir /var/gemini

RUN source ${HOME}/.cargo/env && \
        cd /tmp/agate/ && \
        cargo build --release && \
        mv /tmp/agate/target/release/agate /usr/local/bin/agate

EXPOSE 1965/tcp
VOLUME ["/var/gemini"]

RUN rm -rf /tmp/agate ${HOME}/.cargo

ENTRYPOINT exec /usr/local/bin/agate --content /var/gemini \
        --key /etc/agate/key.rsa --cert /etc/agate/cert.pem \
        --log-ip --lang en-US

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