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157 lines
4.1 KiB
157 lines
4.1 KiB
# Docker
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The docker image will run molly with a SQLite database and
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end-to-end encryption dependencies included. For larger deployments, a
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connection to a Postgres database backend is recommended.
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## Setup
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### The `/data` volume
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The docker container expects the `config.yaml` file to exist at
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`/data/config.yaml`. To easily configure this, it is recommended to create a
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directory on your filesystem, and mount it as `/data` inside the container:
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```
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mkdir data
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```
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We'll later mount this directory into the container so that its contents
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persist across container restarts.
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### Creating a config file
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Copy `sample.config.yaml` to a file named `config.yaml` inside of your newly
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created `data` directory. Fill it out as you normally would, with a few minor
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differences:
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* The bot store directory should reside inside of the data directory so that it
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is not wiped on container restart. Change it from the default to
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`/data/store`. There is no need to create this directory yourself, it will be
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created on startup if it does not exist.
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* Choose whether you want to use SQLite or Postgres as your database backend.
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Postgres has increased performance over SQLite, and is recommended for
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deployments with many users.
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If using SQLite, ensure your database file is
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stored inside the `/data` directory:
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```
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database: "sqlite:///data/bot.db"
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```
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If using postgres, point to your postgres instance instead:
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```
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database: "postgres://username:password@postgres/molly?sslmode=disable"
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```
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**Note:** a postgres container is defined in `docker-compose.yaml` for your convenience.
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If you would like to use it, set your database connection string to:
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```
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database: "postgres://postgres:somefancypassword@postgres/postgres?sslmode=disable"
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```
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The password `somefancypassword` is defined in the docker compose file.
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Change any other config values as necessary. For instance, you may also want to
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store log files in the `/data` directory.
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## Running
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First, create a volume for the data directory created in the above section:
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```
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docker volume create \
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--opt type=none \
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--opt o=bind \
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--opt device="/path/to/data/dir" data_volume
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```
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Optional: If you want to use the postgres container defined in
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`docker-compose.yaml`, start that first:
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```
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docker-compose up -d postgres
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```
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Start the bot with:
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```
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docker-compose up molly
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```
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This will run the bot and log the output to the terminal. You can instead run
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the container detached with the `-d` flag:
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```
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docker-compose up -d molly
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```
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(Logs can later be accessed with the `docker logs` command).
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This will use the `latest` tag from
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[Docker Hub](https://hub.docker.com/somebody/molly).
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If you would rather run from the checked out code, you can use:
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```
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docker-compose up local-checkout
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```
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This will build an optimized, production-ready container. If you are developing
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instead and would like a development container for testing local changes, use
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the `start-dev.sh` script and consult [CONTRIBUTING.md](../CONTRIBUTING.md).
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**Note:** If you are trying to connect to a Synapse instance running on the
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host, you need to allow the IP address of the docker container to connect. This
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is controlled by `bind_addresses` in the `listeners` section of Synapse's
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config. If present, either add the docker internal IP address to the list, or
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remove the option altogether to allow all addresses.
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## Updating
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To update the container, navigate to the bot's `docker` directory and run:
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```
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docker-compose pull molly
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```
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Then restart the bot.
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## Systemd
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A systemd service file is provided for your convenience at
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[molly.service](molly.service). The service uses
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`docker-compose` to start and stop the bot.
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Copy the file to `/etc/systemd/system/molly.service` and edit to
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match your setup. You can then start the bot with:
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```
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systemctl start molly
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```
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and stop it with:
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```
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systemctl stop molly
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```
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To run the bot on system startup:
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```
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systemctl enable molly
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```
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## Building the image
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To build a production image from source, use the following `docker build` command
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from the repo's root:
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```
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docker build -t somebody/molly:latest -f docker/Dockerfile .
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```
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