Specify trusted root/intermediate CA cert for SSL/TSL communication about node-vault HOT 9 CLOSED

var options = {
  apiVersion: 'v1',
  endpoint: 'https://127.0.0.1',
  token: '0123456789',
  requestOptions: {
    ca: fs.readFileSync('/etc/ssl/certs/cabundlefile.crt'),
  }
};

var vault = require("node-vault")(options);

{ RequestError: Error: self signed certificate in certificate chain
    at new RequestError (/opt/node_modules/request-promise/lib/errors.js:11:15)
    at Request.RP$callback [as _callback] (/opt/node_modules/request-promise/lib/rp.js:60:32)
    at self.callback (/opt/node_modules/request/request.js:186:22)
    at emitOne (events.js:96:13)
    at Request.emit (events.js:188:7)
    at Request.onRequestError (/opt/node_modules/request/request.js:878:8)
    at emitOne (events.js:96:13)
    at ClientRequest.emit (events.js:188:7)
    at TLSSocket.socketErrorListener (_http_client.js:310:9)
    at emitOne (events.js:96:13)
    at TLSSocket.emit (events.js:188:7)
    at emitErrorNT (net.js:1277:8)
    at _combinedTickCallback (internal/process/next_tick.js:80:11)
    at process._tickCallback (internal/process/next_tick.js:104:9)
  name: 'RequestError',
  message: 'Error: self signed certificate in certificate chain',
  cause: 
   { Error: self signed certificate in certificate chain
       at Error (native)
       at TLSSocket.<anonymous> (_tls_wrap.js:1092:38)
       at emitNone (events.js:86:13)
       at TLSSocket.emit (events.js:185:7)
       at TLSSocket._finishInit (_tls_wrap.js:610:8)
       at TLSWrap.ssl.onhandshakedone (_tls_wrap.js:440:38) code: 'SELF_SIGNED_CERT_IN_CHAIN' },
  error: 
   { Error: self signed certificate in certificate chain
       at Error (native)
       at TLSSocket.<anonymous> (_tls_wrap.js:1092:38)
       at emitNone (events.js:86:13)
       at TLSSocket.emit (events.js:185:7)
       at TLSSocket._finishInit (_tls_wrap.js:610:8)
       at TLSWrap.ssl.onhandshakedone (_tls_wrap.js:440:38) code: 'SELF_SIGNED_CERT_IN_CHAIN' },
  options: 
   { json: true,
     resolveWithFullResponse: true,
     simple: false,
     strictSSL: true,
     followAllRedirects: true,
     path: '/*******/*******/*******',
     method: 'GET',
     headers: { 'X-Vault-Token': '*************' },
     uri: 'https://****.*****.***:8200/v1/******/****/*********',
     callback: undefined,
     transform: undefined },
  response: undefined }