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Use Kubernetes API with Minikube

Prerequisites

Minikube should be installed (official guide or homebrew).

Let’s start it.

minikube start && kubectl proxy --port=8085

If you are working with multiple Kubernetes clusters, you may need to switch to the specific cluster you want to manage.

# Get the list of available clusters
kubectl config get-contexts

# Switch to desired cluster
kubectl config use-context minikube

And finally the test

curl http://localhost:8085/api/

{
  "kind": "APIVersions",
  "versions": [
    "v1"
  ],
  "serverAddressByClientCIDRs": [
    {
      "clientCIDR": "0.0.0.0/0",
      "serverAddress": "192.168.49.2:8443"
    }
  ]
}

Kubernetes Job API

Get jobs

curl --location --request GET 'http://localhost:8085/apis/batch/v1/namespaces/default/jobs/'

It is likely that when you perform this action, you will receive a response with an empty list of items, as there are no running jobs at the moment.

Let’s create a new job which calculates PI using a Perl docker image.

curl --location --request POST 'http://localhost:8085/apis/batch/v1/namespaces/default/jobs/' \
--header 'Content-Type: application/json' \
--data-raw '{
  "apiVersion": "batch/v1",
  "kind": "Job",
  "metadata": {
    "name": "pi"
  },
  "spec": {
    "template": {
      "spec": {
        "containers": [
          {
            "name": "pi",
            "image": "perl:5.34.0",
            "command": ["perl", "-Mbignum=bpi", "-wle", "print bpi(2000)"],
            "env": []
          }
        ],
        "restartPolicy": "Never"
      }
    },
    "backoffLimit": 4
  }
}'

In order to check if the job is running quickly make a request to “GET Jobs” endpoints.

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