Feature/extend cluster-agent REST API [basics]

[iskitsas]

Introducing new REST endpoints for cluster-agent-api

• /version: get the version of installed MicroK8s. Might be useful in unit/integration testing, health checks, or About/Info pages in a UI/IDE (eg. a MicroK8s Plugin for VS-code)
• /status: a wrapper of microk8s.status
• /services: get all available services with info related to their statuses (enabled and active)
• /service/logs: get the last <N> lines of logs from a selected service

Info on how to test them with curl can be found in the relative README.md page.
Integration tests have been provided for all of those 4 2 new endpoints

Additionally, the callback validation process has been enhanced with a Header Auth option. Instead of passing the callback token from a json body request or form field, it can be passed as a header in the request:

Callback-Token: <CALLBACK_TOKEN_VALUE>

[balchua]

I am interested in this PR. 😊 I think exposing basic actions, for example /status is great.

[iskitsas]

I am interested in this PR. I think exposing basic actions, for example /status is great.

Hi @balchua,

I have also updated the MicroDash UI to use the API from this PR. You can install it separately using k8s/deploy-in-microk8s.sh script, after cloning locally this project:
https://github.com/sastix/microk8s-addons/tree/feature/microdash-basics

When this PR merged, I will provide the scripts so it can be added as a MicroK8s Addon (relative work is here)

The main concept is that Angular files are added in NGINX, which is configured as a reverse proxy, using CALLBACK TOKEN to access MicroK8s APIs and Bearer TOKEN from within the pods to access specific K8S APIs, so an overview of your MicroK8s installation is exposed through your browser using also basic-auth to limit access of UI to admins only.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.