# Docker Compose GitOps (dc-ops)

`dc-ops` is a simple python script that automates the update and deployment of multiple Docker Compose applications.

## How does it work?
It reads a list of git repositories from a YAML configuration file (`config.yml`), pulls the latest changes for each repo, and runs `docker compose up` for each specified `docker-compose.yml` file.

## Features
- Automatically checks for updates in git repositories
- Supports multiple Docker Compose files per repository
- Can be configured to skip certain repositories

## Requirements
See `requirements.txt`

## Usage
1. Install the required Python packages: `pip install -r requirements.txt`
2. Adapt `config.yml.example` to your needs and save it as `config.yml`
3. Run `dc-ops` from the shell or from a cron job

### Cron

Recommended crontab usage:

`*/15 * * * * python3 /opt/dc-ops/dc-ops 2>&1 | ts "\%FT\%H:\%M:\%S" >>/var/log/dc-ops.log`

(do not forget logrotate)

### Systemd

Recommended systemd usage:

```toml
# /etc/systemd/system/dc-ops.service
[Unit]
Description=Run dc-ops once
After=docker.target

[Service]
Type=simple
WorkingDirectory=/opt/dc-ops/
ExecStart=python3 dc-ops
```

```toml
# /etc/systemd/system/dc-ops.timer
[Unit]
Description=Start dc-ops service periodically

[Timer]
Persistent=true
OnCalendar=*:0/15
Unit=dc-ops.service

[Install]
WantedBy=timers.target
```

Enable and start the timer:
```
systemctl enable dc-ops.timer
systemctl start dc-ops.timer
```

## Parameters

See `dc-ops --help`

## Configuration Options
- `stacks`: an array containing details for each repository. Each element is a dictionary containing the following keys:
    - `dir`: the directory of the repository on your local machine.
    - `compose-files`: (optional) array of paths (relative to `dir`) to docker-compose files. Uses `["docker-compose.yml"]` by default if not set.
    - `enabled`: (optional) `false` if this repository should be skipped. Defaults to `true` if not set.
    - `pre`: (optional) a command to be run before `docker compose up`, executed in `dir`.
    - `post`: (optional) a command to be run after `docker compose up`, executed in `dir`.
- `compose-opts`: (optional) define additional parameters to `docker compose up -d`.
- `loglevel`: (optional) define loglevel. Defaults to "INFO" if not set.
- `self-update`: (optional) update this script on startup. Defaults to `false`.

## Detailed process
For each enabled stack in the config file, the following process will be executed:

1. Checking directory existence
2. Fetching latest changes from remote repository
3. If there is a new commit, it will pull the changes
4. Running Docker Compose with the defined or default compose-file(s)