Jafner.net/5etools-docker

This is a simple image for hosting your own 5eTools instance. It is based on the Apache httpd image and uses a modified version of the auto-updater script from the 5eTools wiki.

Usage

Quickstart

You can quick-start this image by running: docker run -d -p 80:80 --rm --name 5etools-docker jafner/5etools-docker Then give the container a minute or two to come online and it will be accessible at localhost. This is what each part of that command does:

docker run \ # this is the basic docker command to start a docker container from a given image
-d \ # this is the 'daemon' flag, which allows the container to run in the background
-p 80:80 \ # this is the port flag which maps port 80 on the host to port 80 inside the container. You can change the host port mapping to something else (such as 8080) if you already have something running on port 80.
--rm \ # this is the remove flag, it tells docker to delete the container when it stops running. This is an option for portability.
--name 5etools-docker \ # this tells docker to set the name of the new container to 5etools-docker, rather than auto-generate a name. You can change this to whatever you like.
jafner/5etools-docker # this is the docker image you want to run. jafner is the repository and 5etools-docker is the specific image. 

Getting token images

You can configure the container's initialization script to download image files by setting the IMG environment variable: docker run -d -p 80:80 --rm --name 5etools-docker -e IMG=true 5etools-docker This will add a significant amount of time to the container's initialization. The -e flag specifies a Docker environment variable, which is passed into the container's shell environment and allows for customization of the container during the run command. Here, the environment variable is named IMG and this command sets the value to true.

Using a persistent volume

You can configure the container to use a persistent volume for the server files, either as a Docker-managed volume or by directly mounting a directory on the host file system into the container. Using a persistent volume is required in order to auto-load homebrew.

Using a Docker-managed volume

You can persist your container's data by using a Docker-managed volume to preserve data, even if the container is destroyed. To do this, add -v 5etools_vol:/usr/local/apache2/htdocs to your run command.

docker run -d -p 80:80 --name 5etools-docker -v 5etools_vol:/usr/local/apache2/htdocs

Using a host directory mapping

You can alternatively persist your container's data by mapping a directory in the host's file system into the container. To do this, first create two empty directories on the host to map into the container: ~/docker/5etools-docker$ mkdir htdocs/ htdocs/download Both of these directories need to be created for the mapping to work. After you've created the empty directories, you can map them into the container with -v ~/5etools-docker/htdocs:/usr/local/apache2/htdocs. docker run -d -p 80:80 --name 5etools-docker -v ~/docker/5etools-docker/htdocs:/usr/local/apache2/htdocs 5etools-docker Note: host directory mappings must be absolute (cannot use . to refer to working directory). However, you can still refer to your working directory with -v ${PWD}/htdocs:/usr/local/apache2/htdocs where ${PWD} runs the pwd (print working directory) command and passes it into the mapping.

Auto-loading homebrew

To set up auto-loading homebrew, first create an empty homebrew/ folder in the directory you would like to use for 5etools-docker. For example ~/docker/5etools-docker/htdocs/homebrew. Then, run the docker container with -v ~/docker/5etools-docker/htdocs/homebrew:/usr/local/apache2/htdocs/homebrew. If you are already using a host directory mapping of -v ~/docker/5etools-docker/htdocs:/usr/local/apache2/htdocs then this is unnecessary. You can configure the homebrew auto-loading as described on the wiki page. You will need to download the json files for the homebrew you would like to auto-load and place them into the homebrew/ directory, then add the filenames to homebrew/index.json.

Updating the container

Because this image is built on the auto-updater script, updating the container is very simple. Restart the container with docker restart 5etools-docker. When it restarts, the container will automatically check for an update and automatically download it before starting. This is true regardless of whether the container is configured to use a persistent volume. Note: there is no way to disable this auto-updating behavior except to never restart the container. If you want a specific version of the container, it is recommended that you use the httpd image instead.

Integrating a reverse proxy

Supporting integration of a reverse proxy is beyond the scope of this guide. However, any instructions which work for the base httpd (Apache) image, should also work for this, as it is minimally different.