# tt-rss Docker Compose files

Docker Compose files to spin up an instance of tt-rss.

# How to run

Add a `COMPOSE_ENV` file and save its location as a shell variable along with the location where this repo lives, here for example `/opt/containers/tt-rss` plus all other variables. At [env/fqdn_context.env.example](env/fqdn_context.env.example) you'll find an example environment file.

When everything's ready start tt-rss with Docker Compose, otherwise head down to [Initial setup](#initial-setup) first.

## Environment

```
export COMPOSE_DIR='/opt/containers/tt-rss'
export COMPOSE_CTX='ux_vilnius'
export COMPOSE_PROJECT='tt_rss-'"${COMPOSE_CTX}"
export COMPOSE_FILE="${COMPOSE_DIR}"'/compose.yaml'
export COMPOSE_OVERRIDE="${COMPOSE_DIR%/}"'/compose.override.yaml'
export COMPOSE_COMMON_SETTINGS="${COMPOSE_DIR%/}"'/common-settings.yaml'
export COMPOSE_ENV=<add accordingly>
```

## Context

On your deployment machine create the necessary Docker context to connect to and control the Docker daemon on whatever target host you'll be using, for example:
```
docker context create fully.qualified.domain.name --docker 'host=ssh://root@fully.qualified.domain.name'
```

## Pull

Pull images from Docker Hub verbatim.

```
docker compose --project-name "${COMPOSE_PROJECT}" --file "${COMPOSE_FILE}" --file "${COMPOSE_OVERRIDE}" --env-file "${COMPOSE_ENV}" pull
```

## Copy to target

Copy images to target Docker host, that is assuming you deploy to a machine that itself has no network route to reach Docker Hub or your private registry of choice. Copying in its simplest form involves a local `docker save` and a remote `docker load`. Consider the helper mini-project [quico.space/Quico/copy-docker](https://quico.space/Quico/copy-docker) where [copy-docker.sh](https://quico.space/Quico/copy-docker/src/branch/main/copy-docker.sh) allows the following workflow:

```
while IFS= read -u 10 -r image; do
    copy-docker "${image}" fully.qualified.domain.name
done 10< <(docker compose --project-name "${COMPOSE_PROJECT}" --file "${COMPOSE_FILE}" --file "${COMPOSE_OVERRIDE}" --env-file "${COMPOSE_ENV}" config | grep -Pi -- 'image:' | awk '{print $2}' | sort | uniq)
```

## Start

```
docker --context 'fully.qualified.domain.name' compose --project-name "${COMPOSE_PROJECT}" --file "${COMPOSE_FILE}" --file "${COMPOSE_OVERRIDE}" --env-file "${COMPOSE_ENV}" up --detach
```

## Clean up

```
docker --context 'fully.qualified.domain.name' system prune -af
docker system prune -af
```

# Initial setup

We're assuming you run Docker Compose workloads with ZFS-based bind mounts. ZFS management, creating a zpool and setting adequate properties for its datasets is out of scope of this document.

## Datasets

Create ZFS datasets and set permissions as needed.

* Parent dateset
    ```
    export "$(grep -Pi -- '^CONTEXT=' "${COMPOSE_ENV}")"
    zfs create -o canmount=off zpool/data/opt
    zfs create -o mountpoint=/opt/docker-data zpool/data/opt/docker-data
    ```

* Container-specific datasets
    ```
    zfs create -p 'zpool/data/opt/docker-data/tt_rss-'"${COMPOSE_CTX}"'/tt_rss/config'
    zfs create -p 'zpool/data/opt/docker-data/tt_rss-'"${COMPOSE_CTX}"'/tt_rss/data'
    zfs create -p 'zpool/data/opt/docker-data/tt_rss-'"${COMPOSE_CTX}"'/db/data'
    ```

* Change ownership
    ```
    chown -R 1000:1000 '/opt/docker-data/tt_rss-'"${COMPOSE_CTX}"'/'*
    ```

## Additional files

No additional files are needed.

Head back up to [How to run](#how-to-run).

# Development

## Conventional commits

This project uses [Conventional Commits](https://www.conventionalcommits.org/) for its commit messages.

### Commit types

Commit _types_ besides `fix` and `feat` are:

- `refactor`: Keeping functionality while streamlining or otherwise improving function flow
- `docs`: Documentation for project or components

### Commit scopes

The following _scopes_ are known for this project. A Conventional Commits commit message may optionally use one of the following scopes or none:

- `tt-rss`: A change to how the `tt-rss` service component works
- `build`: Build-related changes such as `Dockerfile` fixes and features.
- `mount`: Volume or bind mount-related changes.
- `net`: Networking, IP addressing, routing changes
- `meta`: Affects the project's repo layout, file names etc.