Software repositories

Module packages are pulled from software repositories. Multiple repositories can be configured in a NS8 cluster. Each repository contains the list of available modules and can be enabled or disabled. If the repository has the testing flag enabled, it will list also non-stable module versions.

Repository metadata are downloaded and cached inside Redis for 3600 seconds. To expire an existing repository cache, execute: redis-cli del cluster/repository_cache/<repository_name>

A NS8 repository must contain a file named repodata.json which describes the content of the repository. The ns8-repomd is the default repository and contains also the createrepo.sh command which creates the metadata.

The createrepo.sh command analyzes a directory passed as parameter, if no path is given, it walks the current working directory. For each directory found, it uses the directory name to query the remote image registry with skopeo and retrieve image tags. If tags are valid semantic versions they are added to the list of available module version.

Each module that needs to be published inside the repository should have a directory named after the module itself. The directory should contain:

• a file named metadata.json: it contains all module metadata like the name and the URL inside the image registry
• a file named logo.png: a PNG file, 256x256 pixels
• a directory named screenshots: it can contain one ore more image, each image must be in PNG format, with a resolution of 1024x768 pixels

See dokuwiki directory for an example of a complete module metadata directory.

Execute createrepo.sh to generate the repodata.json. The format is described here.