<Feature Request> Provide a means to add global plugin configurations

[rainest]

Summary

Provide a means to configure plugins globally.
Not implemented as of Kong Ingress controller version 0.1.0, the current latest version.
Not specific to K8S version or platform.

Background

Kong can add plugins globally that then apply to any request that does not match a more specific plugin configuration.

At present, the KongPlugin object does not provide any means to configure global plugins, and it is not possible to configure them via Ingress metadata, as all Ingress objects must apply to specific routes.

Implementation considerations

• KongPlugin will need an annotation to specify that the plugin should be applied globally, similar to consumerRef for applying on a per-consumer basis. global: true or similar would work.
• Conflicting or ambiguous configuration (e.g. setting both global: true and consumerRef: yoda on the same KongPlugin) must be handled in some way. The IC could either reject this configuration and return an error when attempting to create the object, or it could attempt to infer the user's intent (creating both a global and consumer-specific plugin configuration with the same settings).

[hbagdi]

This will be possible with #112.

[hbagdi]

Hello @rainest,

#112 just got merged into master. This will be available in our next release. Documentation will be updated before the release process. Thanks!