Registry Tutor plugin

This is an experimental plugin for Tutor that configures access to a private container image registry in a Kubernetes namespace.

Version compatibility matrix

You must install a supported release of this plugin to match the Open edX and Tutor version you are deploying. If you are installing this plugin from a branch in this Git repository, you must select the appropriate one:

Open edX release	Tutor version	Plugin branch	Plugin release
Olive	>=15.0, <16	main	1.x.x
Palm	>=16.0, <17	main	1.x.x
Quince	>=17.0, <18	main	1.x.x

Installation

pip install git+https://github.com/hastexo/tutor-contrib-registry@v1.3.0

Usage

To enable this plugin, run:

tutor plugins enable registry
tutor config save

To test that the command is available, run:

tutor k8s registry --help

To configure access to a private image registry in your kubernetes namespace, run:

tutor k8s registry

This will create a secret for each of your private registries and will add them to the default ServiceAccount in your namespace.

Important note : This command assumes that your namespace already exists. As tutor will create the namespace for you (if one does not already exist) while using tutor k8s launch/ tutor k8s start commands. But, both of these commands will also fail if your services cannot access the private image registry. So, for a fresh deployment (meanin the namespace needs to be created during the deployment run) you cannot run this command before nor after you run the start or launch commands. As a workaround for this we suggest first bringing up a service that uses an upstream default image and doesn't require access to a private registry. Then configure your registry access and run the rest of the deployment as usual.

An example with caddy:

tutor k8s start caddy
tutor k8s registry
tutor k8s launch / tutor k8s start
...

Reference documentation can be found here

Configuration

The following values must be set in your config.yml file:

• K8S_NAMESPACE
• REGISTRY_CREDENTIALS

Where the REGISTRY_CREDENTIALS configuration value is a dictionary that requires the following structure and values:

REGISTRY_CREDENTIALS:
    private-registry.example.com:
        key_name: <key_name>
        password: <password>
        username: <username>
    private-registry.example.org:
        email: <email>  # optional, depending on your registry
        key_name: <key_name>
        password: <password>
        username: <username>