113 lines
4.0 KiB
Markdown
113 lines
4.0 KiB
Markdown
# index.community 🌐
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The map of the fediverse that you always wanted.
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Read the latest updates on Mastodon: [@indexCommunity](https://social.inex.rocks/@indexCommunity)
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- [index.community 🌐](#indexcommunity-%f0%9f%8c%90)
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- [Requirements](#requirements)
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- [Running it](#running-it)
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- [Backend](#backend)
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- [Frontend](#frontend)
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- [Commands](#commands)
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- [Backend](#backend-1)
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- [Frontend](#frontend-1)
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- [Privacy](#privacy)
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- [Deployment](#deployment)
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- [Acknowledgements](#acknowledgements)
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## Requirements
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Note: examples here use `podman`. In most cases you should be able to replace `podman` with `docker`.
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Though containerized, backend development is easiest if you have the following installed.
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- For the crawler + API:
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- Elixir
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- Postgres
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- For laying out the graph:
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- Java
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- For the frontend:
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- Node.js
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- Yarn
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## Running it
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### Backend
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- `cp example.env .env` and modify environment variables as required
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- `podman build gephi && podman build phoenix`
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- `podman run --name elasticsearch -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" elasticsearch:6.8.9`
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- If you've `run` this container previously, use `podman start elasticsearch`
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- `podman run --name postgres -e "POSTGRES_USER=postgres" -e "POSTGRES_PASSWORD=postgres" -p 5432:5432 postgres:12`
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- `podman-compose -f compose.backend-services.yml -f compose.phoenix.yml`
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- Create the elasticsearch index:
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- `iex -S mix app.start`
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- `Elasticsearch.Index.hot_swap(Backend.Elasticsearch.Cluster, :instances)`
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### Frontend
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- `cd frontend && yarn install`
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- `yarn start`
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## Commands
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### Backend
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`./gradlew shadowJar` compiles the graph layout program. `java -Xmx1g -jar build/libs/graphBuilder.jar` runs it.
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### Frontend
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- `yarn build` creates an optimized build for deployment
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## Privacy
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This project doesn't crawl personal instances: the goal is to understand communities, not individuals. The threshold for what makes an instance "personal" is defined in the [backend config](backend/config/config.exs) and the [graph builder SQL](gephi/src/main/java/space/fediverse/graph/GraphBuilder.java).
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## Deployment
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You don't have to follow these instructions, but it's one way to set up a continuous deployment pipeline. The following are for the backend; the frontend is just a static HTML/JS site that can be deployed anywhere.
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1. Install [Dokku](http://dokku.viewdocs.io/dokku/) on your web server.
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2. Install [dokku-postgres](https://github.com/dokku/dokku-postgres), [dokku-monorepo](https://github.com/notpushkin/dokku-monorepo), [dokku-elasticsearch](https://github.com/dokku/dokku-elasticsearch), and [dokku-letsencrypt](https://github.com/dokku/dokku-letsencrypt).
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3. Create the apps
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- `dokku apps:create phoenix`
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- `dokku apps:create gephi`
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4. Create the backing database
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- `dokku postgres:create fediversedb`
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- `dokku postgres:link fediversedb phoenix`
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- `dokku postgres:link fediversedb gephi`
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5. Set up ElasticSearch
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- `dokku elasticsearch:create fediverse`
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- `dokku elasticsearch:link fediverse phoenix`
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6. Update the backend configuration. In particular, change the `user_agent` in [config.exs](/backend/config/config.exs) to something descriptive.
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7. Push the apps, e.g. `git push dokku@<DOMAIN>:phoenix` (note that the first push cannot be from the CD pipeline).
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8. Set up SSL for the Phoenix app
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- `dokku letsencrypt phoenix`
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- `dokku letsencrypt:cron-job --add`
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9. Set up a cron job for the graph layout (use the `dokku` user). E.g.
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```
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SHELL=/bin/bash
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0 2 * * * /usr/bin/dokku run gephi java -Xmx1g -jar build/libs/graphBuilder.jar
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```
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Before the app starts running, make sure that the Elasticsearch index exists -- otherwise it'll create one called
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`instances`, which should be the name of the alias. Then it won't be able to hot swap if you reindex in the future.
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## Acknowledgements
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[](https://nlnet.nl/project/fediverse_space/)
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Many thanks to [NLnet](https://nlnet.nl/project/fediverse_space/) for their support and guidance of this project.
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