# Certbot Cron Docker

![Drone (self-hosted) with branch](https://img.shields.io/drone/build/MrMeeb/certbot-cron-docker/master?label=latest&server=https%3A%2F%2Fdrone.mrmeeb.stream&style=for-the-badge) ![Drone (self-hosted) with branch](https://img.shields.io/drone/build/MrMeeb/certbot-cron-docker/develop?label=develop&server=https%3A%2F%2Fdrone.mrmeeb.stream&style=for-the-badge)

Dockerised Certbot that utilises cron to schedule creating and renewing SSL certificates. Uses Cloudflare for DNS-01 verification. Automatic renewal attempt happens every 6 hours by default.

## Tags

|Tag    |Description|
|-------|-----------|
|latest |Latest image built from the main branch. Usually coincides with a tagged release.|
|develop|Latest image built from the develop branch. Commits are made to the develop branch before being merged to main. Old versions of `develop` are removed after 14 days.|

## Running

### Docker CLI
```
docker run -d --name certbot \
    -e EMAIL=admin@domain.com \
    -e DOMAINS=domain.com \
    -v /docker/certbot-cron:/config \
    git.mrmeeb.stream/mrmeeb/certbot-cron:latest
```

### Docker Compose
```
version: "3"
services:
  certbot:
    image: git.mrmeeb.stream/mrmeeb/certbot-cron:latest
    container_name: certbot
    restart: unless-stopped
    volumes:
      - ./certbot:/config
    environment:
      - EMAIL=admin@domain.com
      - DOMAINS=domain.com,*.domain.com
```

## Environment Variables:

| Variable | Default Value | Description |
| --- | --- | --- |
|PUID    |int    |1000   |Sets the UID of the user certbot runs under |
|PGID    |int    |1000   |Sets the GID of the user certbot runs under |
|TZ      |[List of valid TZs](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones#List)    |UTC    |Sets the timezone of the container |
| EMAIL | None | Email address for renewal information & other communications |
| DOMAINS | None | Domains to be included in the certificate. Comma separated list, no spaces. Wildcards supported |
| INTERVAL | 0 */6 * * * | How often certbot attempts to renew the certificate. Cron syntax |
| STAGING | false (case-sensitive) | Uses the LetsEncrypt staging endpoint for testing - avoids the aggressive rate-limiting of the production endpoint |
| PROPOGATION_TIME | 10 | The amount of time (seconds) that certbot waits for the TXT records to propogate to Cloudflare before verifying - the more domains in the certificate, the longer you might need |
| GENERATE_DHPARAM | true (case-sensitive) | Generate Diffie-Hellman keys in /config/letsencrypt/keys |
| CLOUDFLARE_TOKEN | N/A | Cloudflare token for verification |

## Volumes

| Docker path | Purpose |
| --- | --- |
| /config | Stores configs and LetsEncrypt output for mounting in other containers

## Other

Thanks to [this guy](https://stackoverflow.com/questions/63447441/docker-stop-for-crond-times-out) for explaining how to make cron actually shutdown when stopping the container.