Kubernetes Platform Metrics

This service exposes some information on the current state of the kubernetes cluster. Written in Go

Set up

First apply the Kubernetes service config

$ kubectl apply -f services.yaml # minikube dashboard and paste the yaml in there

Now build the service or run directly

$ make build # or go run .

Configuration

Uses environment variables for config in line with the 12 Factor App.

Manage this with the .env file in the repo.

Tests

$ make test

Endpoints

1. List information on all pods in the cluster

/services endpoint to the service that exposes all pods running in the cluster in namespace default:

Request: GET /services

Response:

[
  {
    "name": "blissful-goodall-deployment",
    "applicationGroup": "beta",
    "runningPodsCount": 1
  },
  {
    "name": "confident-cartwright-deployment",
    "applicationGroup": "beta",
    "runningPodsCount": 1
  },
  {
    "name": "happy-colden-deployment",
    "applicationGroup": "",
    "runningPodsCount": 1
  },
  {
    "name": "quirky-raman-deployment",
    "applicationGroup": "gamma",
    "runningPodsCount": 1
  },
  {
    "name": "stoic-sammet-deployment",
    "applicationGroup": "alpha",
    "runningPodsCount": 2
  }
]

2. Get information on a group of applications in the cluster

/services/{group} exposes the pods in the cluster in namespace default that are part of the same applicationGroup:

Request: GET /services/{applicationGroup}

Response:

[
  {
    "name": "blissful-goodall-deployment",
    "applicationGroup": "beta",
    "runningPodsCount": 1
  },
  {
    "name": "confident-cartwright-deployment",
    "applicationGroup": "beta",
    "runningPodsCount": 1
  }
]