About

Diun 🔔 is a CLI application written in Go to receive notifications 📥 when a Docker 🐳 image is updated on a Docker registry. With Go, this app can be used across many platforms 🎲 and architectures. This support includes Linux, FreeBSD, macOS and Windows on architectures like amd64, i386, ARM and others.

Features

• Allow to watch a full Docker repository and report new tags
• Include and exclude filters with regular expression for tags
• Internal cron implementation through go routines
• Beautiful email report
• Webhook notification
• Enhanced logging
• Timezone can be changed
• 🐳 Official Docker image available

Download

Diun binaries are available in releases page.

Choose the archive matching the destination platform and extract diun:

$ cd /opt
$ wget -qO- https://github.com/crazy-max/diun/releases/download/v0.1.0/diun_0.1.0_linux_x86_64.tar.gz | tar -zxvf - diun

After getting the binary, it can be tested with ./diun --help or moved to a permanent location.

$ ./diun --help
usage: diun --config=CONFIG [<flags>]

Docker image update notifier. More info on https://github.com/crazy-max/diun

Flags:
  --help              Show context-sensitive help (also try --help-long and
                      --help-man).
  --config=CONFIG     Diun configuration file.
  --timezone="UTC"    Timezone assigned to Diun.
  --log-level="info"  Set log level.
  --log-json          Enable JSON logging output.
  --run-once          Run once on startup.
  --docker            Enable Docker mode.
  --version           Show application version.

Usage

diun --config=CONFIG [<flags>]

• --help : Show help text and exit. Optional.
• --version : Show version and exit. Optional.
• --config <path> : Diun YAML configuration file. Required. (example: diun.yml).
• --timezone <timezone> : Timezone assigned to Diun. Optional. (default: UTC).
• --log-level <level> : Log level output. Optional. (default: info).
• --log-json : Enable JSON logging output. Optional. (default: false).
• --run-once : Run once on startup. Optional. (default: false).

Configuration

Before running Diun, you must create your first configuration file. Here is a YAML structure example :

db:
  path: diun.db

watch:
  schedule: 0 */30 * * * *

notif:
  mail:
    enable: false
    host: localhost
    port: 25
    ssl: false
    insecure_skip_verify: false
    username:
    password:
    from:
    to:
  webhook:
    enable: false
    endpoint: http://webhook.foo.com/sd54qad89azd5a
    method: GET
    headers:
      Content-Type: application/json
      Authorization: Token123456
    timeout: 10

reg_creds:
  aregistrycred:
    username: foo
    password: bar
  another:
    username: foo2
    password: bar2

items:
  -
    image: docker.io/crazymax/nextcloud:latest
    reg_cred_id: aregistrycred
  -
    image: jfrog-docker-reg2.bintray.io/jfrog/artifactory-oss:4.0.0
    reg_cred_id: another
  -
    image: quay.io/coreos/hyperkube
  -
    image: crazymax/swarm-cronjob
    watch_repo: true
    include_tags:
      - ^1.2.*

• db
  • path: Path to Bolt database file where images analysis are stored. Flag --docker force this path to /data/diun.db (default: diun.db).
• watch
  • schedule: CRON expression to schedule Diun watcher. Optional. (default: 0 */30 * * * *).
• notif
  • mail
    • enable: Enable email reports (default: false).
    • host: SMTP server host (default: localhost). required
    • port: SMTP server port (default: 25). required
    • ssl: SSL defines whether an SSL connection is used. Should be false in most cases since the auth mechanism should use STARTTLS (default: false).
    • insecure_skip_verify: Controls whether a client verifies the server's certificate chain and host name (default: false).
    • username: SMTP username.
    • password: SMTP password.
    • from: Sender email address. required
    • to: Recipient email address. required
  • webhook
    • enable: Enable webhook notification (default: false).
    • endpoint: URL of the HTTP request. required
    • method: HTTP method (default: GET). required
    • headers: Map of additional headers to be sent.
    • timeout: Timeout specifies a time limit for the request to be made. (default: 10).
• reg_creds: Map of registry credentials to use with items. Key is the ID and value is a struct with the following fields:
  • username: Registry username.
  • password: Registry password.
• items: Slice of items to watch with the following fields:
  • image: Docker image to watch using registry/path:tag format. If registry is omitted, docker.io will be used. If tag is omitted, latest will be used. required
  • reg_cred_id: Registry credential ID from reg_creds to use.
  • insecure_tls: Allow contacting docker registries over HTTP, or HTTPS with failed TLS verification (default: false).
  • watch_repo: Watch all tags of this image repository (default: false).
  • include_tags: List of regular expressions to include tags. Can be useful if you use watch_repo.
  • exclude_tags: List of regular expressions to exclude tags. Can be useful if you use watch_repo.
  • timeout: Timeout is the maximum amount of time for the TCP connection to establish. 0 means no timeout (default: 10).

Docker

Diun provides automatically updated Docker 🐳 images within Docker Hub and Quay. It is possible to always use the latest stable tag or to use another service that handles updating Docker images.

Environment variables can be used within your container :

• TZ : Timezone assigned
• LOG_LEVEL : Log level output (default info)
• LOG_JSON: Enable JSON logging output (default false)
• RUN_ONCE: Run once on startup (default false)

Docker compose is the recommended way to run this image. Copy the content of folder .res/compose in /opt/diun/ on your host for example. Edit the compose and config file with your preferences and run the following commands :

docker-compose up -d
docker-compose logs -f

Or use the following command :

$ docker run -d --name diun \
  -e "TZ=Europe/Paris" \
  -e "LOG_LEVEL=info" \
  -e "LOG_JSON=false" \
  -e "RUN_ONCE=false" \
  -v "$(pwd)/data:/data" \
  -v "$(pwd)/diun.yml:/diun.yml:ro" \
  crazymax/diun:latest

Mail notification sample

TODO

• Scan Dockerfile
• Watch images from Docker daemon

How can I help ?

All kinds of contributions are welcome 🙌!
The most basic way to show your support is to star 🌟 the project, or to raise issues 💬
But we're not gonna lie to each other, I'd rather you buy me a beer or two 🍻!

License

MIT. See LICENSE for more details.