Docker Update

Try to show updates for your used docker images.

Requirements

• Docker
• docker-compose
• Libraries: requirements.txt (pip3 install -r requirements.txt or docker ;))

You need a directory containing your service directories. These services must have a docker-compose.yml to get checked.

Example:

└── services
    ├── bitpoll.wiai.de
    │   ├── docker
    │   ├── docker-compose.yml
    ├── dockerui
    │   ├── docker-compose.yml
    └── zitate
        └── docker-compose.yml

If there are files or directories without a docker-compse.yml, it will just notify you and ignore it.

If the compose file contains a build-section, the Dockerfile is inspected, too.

Usage

Docker

Modify mount of services directory. Mount your directory as /services.

docker-compose up

Output file: updates.json

Command line

$ python3 show_updateable.py -h
usage: show_updateable.py [-h] [--output OUTPUT]
                          [--ignore IGNORE [IGNORE ...]] [--match-suffix]
                          compose_files [compose_files ...]

• output: json file for results
• ignore: ignore services (ignore is substring of service path)
• match-suffix: use only same suffixes in image labels (e.g. only -alpine images)
• compose files: service directories: see #example (multiple paths allowed)

Advantages

• No access to Docker-Socket
• No deamon
• No state
• Detect new major versions
• Report only, no uncontrolled automated actions
• tbc ...

Alternatives

• https://github.com/v2tec/watchtower (seems quite dead, look for forks)
• https://github.com/pyouroboros/ouroboros
• https://engineering.salesforce.com/open-sourcing-dockerfile-image-update-6400121c1a
• https://stackoverflow.com/questions/26423515/how-to-automatically-update-your-docker-containers-if-base-images-are-updated
• tbc ...

Known Issues

• Still WiP/PoC
• http/https sources are not implemented yet
• some images have … weird tags
• pull requests welcome