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Federation Development

Setup

If you don't have a local clone of the Lemmy repo yet, just run the following command:

git clone https://github.com/LemmyNet/lemmy

Running locally

You need to have the following packages installed, the Docker service needs to be running.

docker
docker-compose
cargo
yarn

Then run the following

cd docker/federation
./run-federation-test.bash -yarn

The federation test sets up 3 instances:

Instance / Username	Location
lemmy_alpha	127.0.0.1:8540
lemmy_beta	127.0.0.1:8550
lemmy_gamma	127.0.0.1:8560

You can log into each using the instance name, and lemmy as the password, IE (lemmy_alpha, lemmy).

Firefox containers are a good way to test them interacting.

Integration tests

To run a suite of suite of federation integration tests:

cd docker/federation-test
./run-tests.sh

Running on a server

Note that federation is currently in alpha. Only use it for testing, not on any production server, and be aware that turning on federation may break your instance.

Follow the normal installation instructions, either with Ansible or manually. Then replace the line image: dessalines/lemmy:v0.x.x in /lemmy/docker-compose.yml with image: dessalines/lemmy:federation. Also add the following in /lemmy/lemmy.hjson:

    federation: {
        enabled: true
        tls_enabled: true,
        allowed_instances: example.com,
    }

Afterwards, and whenever you want to update to the latest version, run these commands on the server:

cd /lemmy/
sudo docker-compose pull
sudo docker-compose up -d

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