computer-playbook/roles/web-app-mastodon/README.md

# Mastodon

## Description

Dive into a decentralized social experience with Mastodon, a vibrant platform that redefines online communication with its federated, community-driven approach. With a rich set of features focused on privacy, scalability, and customization, Mastodon empowers users to create, share, and interact in an open social network.

## Overview

This role deploys Mastodon using Docker, streamlining the installation and configuration of a full-featured social networking platform. Mastodon is built to support federation across multiple instances, offering robust content moderation, real-time updates, and flexible API integrations. Its advanced architecture includes separate services for the web frontend, streaming API, and background job processing, ensuring high performance and scalability for large communities.

## Cosmos

The diagram places Mastodon in the Infinito.Nexus cosmos: the components it deploys (capabilities), the central services it consumes (dependencies), and its outward reach (federation and bridged external networks).

```mermaid
flowchart LR
    subgraph deps [Dependencies]
        dep_svc_bkp_volume_2_local["svc-bkp-volume-2-local 💻"]
        dep_svc_db_postgres["svc-db-postgres 🐳🐝"]
        dep_svc_db_redis["svc-db-redis 🐳🐝"]
        dep_svc_net_tor["svc-net-tor 🐳🐝"]
        dep_web_app_dashboard["web-app-dashboard 🐳🐝"]
        dep_web_app_keycloak["web-app-keycloak 🐳🐝"]
        dep_web_app_matomo["web-app-matomo 🐳🐝"]
        dep_web_app_prometheus["web-app-prometheus 🐳🐝"]
        dep_web_app_seaweedfs["web-app-seaweedfs 🐳🐝"]
        dep_web_app_stalwart["web-app-stalwart 🐳🐝"]
        dep_web_svc_css["web-svc-css 💻"]
        dep_web_svc_logout["web-svc-logout 🐳🐝"]
    end
    subgraph role [web-app-mastodon 🐳🐝]
        svc_sso["sso"]
        svc_logout["logout"]
        svc_dashboard["dashboard"]
        svc_matomo["matomo"]
        svc_email["email"]
        svc_redis["redis"]
        svc_postgres["postgres"]
        svc_mastodon["mastodon"]
        svc_streaming["streaming"]
        svc_sidekiq["sidekiq"]
        svc_migrate["migrate"]
        svc_minio["minio ❌"]
        svc_seaweedfs["seaweedfs"]
        svc_css["css"]
        svc_prometheus["prometheus"]
        svc_tor["tor"]
        svc_container_backup["container_backup"]
    end
    subgraph dependents [Dependents]
        dpt_web_app_fediwall["web-app-fediwall 🐳🐝"]
        dpt_web_app_nextcloud["web-app-nextcloud 🐳🐝"]
    end
    dep_svc_bkp_volume_2_local -. "0..1" .-> svc_container_backup
    dep_svc_db_postgres -. "0..1" .-> svc_postgres
    dep_svc_db_redis -. "0..1" .-> svc_redis
    dep_svc_net_tor -. "0..1" .-> svc_tor
    dep_web_app_dashboard -. "0..1" .-> svc_dashboard
    dep_web_app_keycloak -. "0..1" .-> svc_sso
    dep_web_app_matomo -. "0..1" .-> svc_matomo
    dep_web_app_prometheus -. "0..1" .-> svc_prometheus
    dep_web_app_seaweedfs -. "0..1" .-> svc_seaweedfs
    dep_web_app_stalwart -. "0..1" .-> svc_email
    dep_web_svc_css -. "0..1" .-> svc_css
    dep_web_svc_logout -. "0..1" .-> svc_logout
    svc_sso -. "0..1" .-> dpt_web_app_fediwall
    svc_sso -. "0..1" .-> dpt_web_app_nextcloud
```

Solid `1:1` edges are fixed relationships; dashed `0..1` edges are conditional (enabled only in matching deployments); red `0..0` edges are turned off in this role. Node markers show the role's deploy modes (💻 host, 🐳 compose, 🐝 swarm); ❌ marks a service that is explicitly turned off, and ⚙️ an Ansible role dependency declared in `meta/main.yml`.

## Features

- **Decentralized Network:** Connect with users across multiple instances in a federated social media ecosystem.
- **Real-Time Streaming:** Enjoy dynamic updates and real-time content delivery through dedicated streaming services.
- **Robust Content Moderation:** Utilize powerful moderation tools to manage community interactions and maintain safe spaces.
- **Scalable Architecture:** Benefit from a multi-service, Docker-based setup that supports high user loads and seamless background processing.
- **Flexible Authentication:** Integrated support for OpenID Connect (OIDC) simplifies user login and enhances security.
- **Customizable User Experience:** Configure themes, timeline settings, and notification options to tailor the social experience to your community.

## Quick Setup

### Development

Clone, set up the workstation, and deploy Mastodon onto the local stack:

```bash
git clone https://github.com/infinito-nexus/core.git
cd core
make onboard
make compose-deploy mode=reinstall apps=web-app-mastodon full_cycle=false
```

### Production

Run the published image to provision the inventory and deploy Mastodon to a managed server (the mounted volume persists the inventory):

```bash
APP=web-app-mastodon
HOST=<your-server>
DOMAIN=<your-domain>
TLS_MODE=self_signed
SSH_PUBLIC_KEY="<your-ssh-public-key>"

docker run --rm -it \
  -v "$PWD/inventories:/etc/infinito.nexus/inventories" \
  -e APP="$APP" -e HOST="$HOST" -e DOMAIN="$DOMAIN" -e TLS_MODE="$TLS_MODE" -e SSH_PUBLIC_KEY="$SSH_PUBLIC_KEY" \
  ghcr.io/infinito-nexus/core/debian bash -c '
    INVENTORY=/etc/infinito.nexus/inventories/production
    infinito administration inventory provision "$INVENTORY" \
      --inventory-file "$INVENTORY/devices.yml" \
      --host "$HOST" \
      --include "$APP" \
      --vars "{\"TLS_MODE\": \"$TLS_MODE\", \"DOMAIN_PRIMARY\": \"$DOMAIN\", \"users\": {\"administrator\": {\"authorized_keys\": [\"$SSH_PUBLIC_KEY\"]}}}" &&
    infinito administration deploy dedicated "$INVENTORY/devices.yml" \
      --password-file "$INVENTORY/.password" \
      --diff -vv'
```

## Further Resources

- [Mastodon Official Website](https://joinmastodon.org/)
- [Mastodon Documentation](https://docs.joinmastodon.org/)
- [Mastodon Configuration Guide](https://gist.github.com/TrillCyborg/84939cd4013ace9960031b803a0590c4)
- [Scaling a Mastodon Server](https://www.digitalocean.com/community/tutorials/how-to-scale-your-mastodon-server)
- [Mastodon GitHub Issues](https://github.com/mastodon/mastodon/issues/7958)

## Persona contract opt-outs

[`tasks/05_administrator.yml`](./tasks/05_administrator.yml) creates the account with `tootctl accounts create` and never sets or captures a password, so `ADMIN_PASSWORD` — the Keycloak secret — cannot drive Mastodon's native `/auth/sign_in`; `biber` has no Mastodon account at all, since the OIDC sign-in ([`templates/env.j2`](./templates/env.j2)) is the only path that would create one. In the `services.sso.enabled: false` matrix variants that path is removed, so [`templates/playwright.env.j2`](./templates/playwright.env.j2) renders `PERSONA_BIBER_BLOCKED=true` and `PERSONA_ADMINISTRATOR_BLOCKED=true`. The SeaweedFS companion scenario ([`files/playwright/test-seaweedfs.js`](./files/playwright/test-seaweedfs.js)) drives the same admin journey and skips on the same flag.

## Credits

Implemented by **[Kevin Veen-Birkenbach](https://www.veen.world)**.
Part of the [Infinito.Nexus Project](https://s.infinito.nexus/code) and maintained by [Kevin Veen-Birkenbach](https://www.veen.world).
Licensed under the [Infinito.Nexus Community License (Non-Commercial)](https://s.infinito.nexus/license).