# Installation from Docker image

## About

Diun provides automatically updated Docker :whale: images within several registries:

| Registry                                                                                        | Image                    |
|-------------------------------------------------------------------------------------------------|--------------------------|
| [Docker Hub](https://hub.docker.com/r/crazymax/diun/)                                           | `crazymax/diun`          |
| [GitHub Container Registry](https://github.com/users/crazy-max/packages/container/package/diun) | `ghcr.io/crazy-max/diun` |

It is possible to always use the latest stable tag or to use another service that handles updating Docker images.

Following platforms for this image are available:

```
$ docker run --rm mplatform/mquery crazymax/diun:latest
Image: crazymax/diun:latest
 * Manifest List: Yes
 * Supported platforms:
   - linux/amd64
   - linux/arm/v6
   - linux/arm/v7
   - linux/arm64
   - linux/386
   - linux/ppc64le
```

## Volumes

| Path    | Description                                                   |
|---------|---------------------------------------------------------------|
| `/data` | Contains bbolt database which retains Docker images manifests |

## Usage

!!! note
    This reference setup guides users through the setup based on Docker Compose
    and the [Docker provider](../providers/docker.md), but the installation of
    Docker Compose is out of scope of this documentation. To install Docker
    Compose itself, follow the official [install instructions](https://docs.docker.com/compose/install/).
    
    You can also use the [Swarm](../providers/swarm.md) or [Kubernetes](../providers/kubernetes.md) providers
    if you don't want to use Docker Compose.

```yaml
name: diun

services:
  diun:
    image: crazymax/diun:latest
    command: serve
    volumes:
      - "./data:/data"
      - "/var/run/docker.sock:/var/run/docker.sock"
    environment:
      - "TZ=Europe/Paris"
      - "DIUN_WATCH_WORKERS=20"
      - "DIUN_WATCH_SCHEDULE=0 */6 * * *"
      - "DIUN_WATCH_JITTER=30s"
      - "DIUN_PROVIDERS_DOCKER=true"
    labels:
      - "diun.enable=true"
    restart: always
```

Edit this example with your preferences and run the following commands to bring up Diun:

```shell
docker compose up -d
docker compose logs -f
```

Or use the following command:

```shell
docker run -d --name diun \
  -e "TZ=Europe/Paris" \
  -e "DIUN_WATCH_WORKERS=20" \
  -e "DIUN_WATCH_SCHEDULE=0 */6 * * *" \
  -e "DIUN_WATCH_JITTER=30s" \
  -e "DIUN_PROVIDERS_DOCKER=true" \
  -v "$PWD/data:/data" \
  -v "/var/run/docker.sock:/var/run/docker.sock" \
  -l "diun.enable=true" \
  crazymax/diun:latest
```

To upgrade your installation to the latest release:

```shell
docker compose pull
docker compose up -d
```

If you prefer to rely on the configuration file instead of environment variables:

```yaml
name: diun

services:
  diun:
    image: crazymax/diun:latest
    command: serve
    volumes:
      - "./data:/data"
      - "./diun.yml:/diun.yml:ro"
      - "/var/run/docker.sock:/var/run/docker.sock"
    environment:
      - "TZ=Europe/Paris"
      - "LOG_LEVEL=info"
      - "LOG_JSON=false"
    restart: always
```

```yaml
# ./diun.yml

watch:
  workers: 20
  schedule: "0 */6 * * *"

providers:
  docker:
    watchStopped: true
```

## Podman

If you're using [Podman](https://podman.io/) there are some small changes:

```yaml
version: "3.5"

services:
  diun_app:
    image: docker.io/crazymax/diun:latest
    # security_opt is neccessary if you use podman in rootless mode to apply the correct SELinux rules
    security_opt:
      - "label=type:container_runtime_t"
    volumes:
      - "./data:/data"
      # root mode
      - "/run/podman/podman.sock:/var/run/docker.sock"
      # rootless mode
      #- "$XDG_RUNTIME_DIR/podman/podman.sock:/var/run/docker.sock"
      #- "/run/user/1000/podman/podman.sock:/var/run/docker.sock"
    environment:
      - "TZ=Europe/Paris"
      - "DIUN_WATCH_WORKERS=20"
      - "DIUN_WATCH_SCHEDULE=0 */6 * * *"
      - "DIUN_WATCH_JITTER=30s"
      - "DIUN_PROVIDERS_DOCKER=true"
    labels:
      - "diun.enable=true"
    restart: always
```

Edit this example with your preferences and run the following commands to bring up Diun with [`podman-compose`](https://github.com/containers/podman-compose):

```shell
podman-compose up -d
podman-compose logs -f
```