I am running a node.js service in a Kubernetes container. My service uses the token inside the service account to make calls to the API server from inside the POD. My code is like this

var fs = require('fs');
var tokenFile ='/var/run/secrets/kubernetes.io/serviceaccount/token';
var restCall = function(serviceUrl,reqMethod,callback){  
var token = "";

fs.readFile(tokenFile, 'utf8', function(err, data) {
  if (err) throw err;
  token ='Bearer '+data;
});

var serviceUrl = https://<clusterName>/api/v1/nodes      
var options = {
  url: serviceUrl,  
  headers: {
    'Content-Type': 'application/json',
    'Authorization': token            
  },
  method: reqMethod
};

I am receiving this error in response

self signed certificate in certificate chain.

I am able to make calls using the token through rest client, when I deployed to container it was returning socket connection error