adriel/caddy

Discontinued

Caddy 2 is out and now has an https://hub.docker.com/_/caddy, please use that.

A Docker image for Caddy. This image includes the git and cloudflare plugins. Plugins can also be configured via the plugins build arg.

Credit

A big thank you to https://github.com/abiosoft/caddy-docker whos this image is forked off.

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Telemetry

Telemetry has been enabled by default on this image! If you do not want this please use another docker image.

Getting Started

sh
$ docker run -d -p 2015:2015 adriel/caddy

Point your browser to http://127.0.0.1:2015.

Be aware! If you don't bind mount the location certificates are saved to, you may hit Let's Encrypt rate limits rending further certificate generation or renewal disallowed (for a fixed period)! See "Saving Certificates" below!

Saving Certificates

Save certificates on host machine to prevent regeneration every time container starts. Let's Encrypt has rate limit.

sh
$ docker run -d \
    -v $(pwd)/Caddyfile:/etc/Caddyfile \
    -v $HOME/.caddy:/root/.caddy \
    -p 80:80 -p 443:443 \
    adriel/caddy

Here, /root/.caddy is the location inside the container where Caddy will save certificates.

Additionally, you can use an environment variable to define the exact location Caddy should save generated certificates:

sh
$ docker run -d \
    -e "CADDYPATH=/etc/caddycerts" \
    -v $HOME/.caddy:/etc/caddycerts \
    -p 80:80 -p 443:443 \
    adriel/caddy

Above, we utilize the CADDYPATH environment variable to define a different location inside the container for certificates to be stored. This is probably the safest option as it ensures any future docker image changes don't interfere with your ability to save certificates!

PHP

:[<version>-]php variant of this image bundles PHP-FPM alongside essential php extensions and composer. e.g. :php, :0.10-php

sh
$ docker run -d -p 2015:2015 adriel/caddy:php

Point your browser to http://127.0.0.1:2015 and you will see a php info page.

Local php source

Replace /path/to/php/src with your php sources directory.

sh
$ docker run -d -v /path/to/php/src:/srv -p 2015:2015 adriel/caddy:php

Point your browser to http://127.0.0.1:2015.

Note

Your Caddyfile must include the line on startup php-fpm7. For Caddy to be PID 1 in the container, php-fpm7 could not be started.

Using Cloudflare

Caddy can talk to Cloudflare via their API to automaticly confugure/update your Let's Encrypt certificates using the Cloudflare plugin (which has been included in this image).

Follow the instrutions here to set it up.

Using git sources

Caddy can serve sites from git repository using git plugin.

Create Caddyfile

Replace github.com/adriel/webtest with your repository.

sh
$ printf "0.0.0.0\nroot src\ngit github.com/adriel/webtest" > Caddyfile

Run the image

sh
$ docker run -d -v $(pwd)/Caddyfile:/etc/Caddyfile -p 2015:2015 abiosoft/caddy

Point your browser to http://127.0.0.1:2015.

Usage

Default Caddyfile

The image contains a default Caddyfile.

0.0.0.0
browse
fastcgi / 127.0.0.1:9000 php # php variant only
startup php-fpm7 # php variant only

The last 2 lines are only present in the php variant.

Paths in container

Caddyfile: /etc/Caddyfile

Sites root: /srv

Using local Caddyfile and sites root

Replace /path/to/Caddyfile and /path/to/sites/root accordingly.

sh
$ docker run -d \
    -v /path/to/sites/root:/srv \
    -v path/to/Caddyfile:/etc/Caddyfile \
    -p 2015:2015 \
    abiosoft/caddy

Let's Encrypt Auto SSL

Note that this does not work on local environments.

Use a valid domain and add email to your Caddyfile to avoid prompt at runtime. Replace mydomain.com with your domain and user@host.com with your email.

mydomain.com
tls user@host.com

Run the image

You can change the the ports if ports 80 and 443 are not available on host. e.g. 81:80, 444:443

sh
$ docker run -d \
    -v $(pwd)/Caddyfile:/etc/Caddyfile \
    -p 80:80 -p 443:443 \
    abiosoft/caddy