Issue with POST to /oauth2/token from container inside K8s

[vince]

I'm having some issues with my nodejs backend making POST requests to Fusionauths /oauth2/token endpoint when the the nodejs app is running Kubernetes.

I used the fusionauth provided example for react with a node backend as a template and updated it a bit. It works great when I run it locally on my dev machine but when I run the nodejs backend in a Kubernetes pod I'm getting the following error:
"Client network socket disconnected before secure TLS connection was established"

Below is my callback code

const express = require('express');
const router = express.Router();
const axios = require('axios');


router.get('/oauth-callback', async (req, res) => {

  const uri = `${process.env.FUSION_AUTH_URI}/oauth2/token`;

  const form = new FormData();
  form.append('client_id', process.env.FUSION_AUTH_CLIENT_ID);
  form.append('client_secret', process.env.FUSION_AUTH_CLIENT_SECRET)
  form.append('code', req.query.code);
  form.append('grant_type', 'authorization_code');
  form.append('redirect_uri', process.env.FUSION_AUTH_REDIRECT_URI);

  axios.post(uri, form, { headers: form.getHeaders() })
    .then((response) => {
      req.session.token = response.data.access_token;
      res.redirect(process.env.FUSION_AUTH_LOGGED_IN_URI);
    }).catch((error) => {
      console.error("error", JSON.stringify(error));
      res.redirect(process.env.FUSION_AUTH_LOGGED_IN_URI);
    });

});

[dan]

@vince Hmmm. That sounds like a network connectivity issue. Googling for Client network socket disconnected before secure TLS connection was established shows that a lot of folks have proxy issues.

Can you run curl on the same host and see if you can get to FusionAuth successfully?