Sharding Reverse Proxy for Etherpad

This is a reverse proxy that which will shard pads based on padId(within query[currently in socket-namespace branch of Etherpad core]) to a pool of backends based on the availability of the backends which is based on the number of concurrent active Pads being edited.

This is now a production grade reverse proxy written in Golang.

Getting started for production

1. Install Docker
2. Install Docker Compose
3. Use the provided docker-compose
4. Copy settings.json.template to settings.json and modify the values.
5. Depending on the port value in settings.json, you may need to modify the ports section of the docker-compose.yml file.

  reverse-proxy:
    container_name: reverse-proxy
    image: ghcr.io/ether/etherpad-proxy:latest
    ports:
      - "9000:9000"
    volumes:
      - ./reverse-proxy/db:/app/db
      - ./settings.json:/app/settings.json

Visit http://localhost:9000

Settings

Settings come from settings.json, see settings.json.template for an example to modify for your environment.

backends is your Backend Etherpad instances.

maxPadsPerInstance is how many active pads you want to allow per instance. This value should be between 1 and 20000 depending on the number of authors and words per minute that you limit or you wish to allow. Once this limit is met then random instances will be used.

checkInterval is how often to check every backend for availability. You should set this to a low number if you have lower number of very active instances with short pad life. You should set this to a high number if you have lots of instances with relatively long pad life expectancy.

port is the port this service listens on.

OAuth2 backed Etherpads

clientId is the clientId used to authenticate with the backend Etherpad instances. This should be a random string that is unique to this service.

clientSecret is the clientSecret used to authenticate with the backend Etherpad instances. This should be a random string that is unique to this service. tokenURL is the URL of the OAuth2 token endpoint. This is normally http://<your-host>:<your-port>/oidc/token

Basic Auth backed Etherpads

username is the username used to authenticate with the backend Etherpad instances. This should be a random string that is unique to this service.

password is the password used to authenticate with the backend Etherpad instances. This should be a random string that is unique to this service.

Pads will be fetched every checkInterval * seconds whereas the normal checkInterval runs every checkInterval * milliseconds. If pads are deleted they are also deleted from the reverse proxy so it can be reassigned to another backend.

License

Apache 2