Railway•10mo ago

Proper Connecting String Syntax for Private Services

I must be going insane. Whats the right connection string format to connect to a private service in a Railway network? I've tried:

service
service.railway.internal 
service.railway.internal/graphql
service.railway.internal:port/graphql
http://service.railway.internal/graphql
https://service.railway.internal/graphql
http://service.railway.internal:port/graphql
https://service.railway.internal:port/graphql

service
service.railway.internal 
service.railway.internal/graphql
service.railway.internal:port/graphql
http://service.railway.internal/graphql
https://service.railway.internal/graphql
http://service.railway.internal:port/graphql
https://service.railway.internal:port/graphql

I am attempting to call a graphql endpoint in one Node service from another using fetch.

const fetchGQL = async (query, variables) => {
    try {
        const res = await fetch(API_URL, {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json',
            },
            body: JSON.stringify({
                query: query,
                variables: variables,
            }),
        });
        const obj = await res.json();
        return obj.data;
    } catch (err) {
        logger.error({ error: err }, 'GraphQL fetch failed.');
    }
};

const res = fetchGQL(query, vars); 

res = undefined

API_URL = each of the above

const fetchGQL = async (query, variables) => {
    try {
        const res = await fetch(API_URL, {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json',
            },
            body: JSON.stringify({
                query: query,
                variables: variables,
            }),
        });
        const obj = await res.json();
        return obj.data;
    } catch (err) {
        logger.error({ error: err }, 'GraphQL fetch failed.');
    }
};

const res = fetchGQL(query, vars); 

res = undefined

API_URL = each of the above

The service I am attempting to connect to is running on port 7653. I know this because I have it log process.env.PORT on start.

Solution:

its kinda in the docs https://docs.railway.app/guides/private-networking#communicating-over-the-private-network

Jump to solution

10 Replies

Percy•10mo ago

Project ID: db989257-d5bb-4cba-acd6-bc0aa22606a5

bigviking•10mo ago

db989257-d5bb-4cba-acd6-bc0aa22606a5 Public API for the service works. I can query it from Postman. << Hold off on responding to this just working something out >> OK after another few hours I must be not understanding how to access services via private endpoints from within the network. When using the service's public address I have no problems whatsoever. After some more reading I came across this.

You will need to bind to a IPv6 port to receive traffic on the private network.

You will need to bind to a IPv6 port to receive traffic on the private network.

How would I implement this in an express application so another app can privately talk to it? I had to do this in my Express app. And now it can accept IPv6 connections. Someone should add this to your docs. It took me hours for something really simple (beginner).

const hostname = '::';

    // http server start
    httpServer.listen(PORT, hostname, () => {
        logger.info(
            `Apollo/GraphQL websocket service is live on endpoint: ${PORT}/graphql`
        );
    });

const hostname = '::';

    // http server start
    httpServer.listen(PORT, hostname, () => {
        logger.info(
            `Apollo/GraphQL websocket service is live on endpoint: ${PORT}/graphql`
        );
    });

Solution

Brody•10mo ago

its kinda in the docs https://docs.railway.app/guides/private-networking#communicating-over-the-private-network

Brody•10mo ago

but whats not in the docs, is that you will want to set a static PORT service variable and then listen on that variable

bigviking•10mo ago

Oh for .... lfg

could have sworn I read that page a half dozen times

Brody•10mo ago

use the search bar lol

bigviking•10mo ago

Its late..

Brody•10mo ago

fair enough

bigviking•10mo ago

Thank you sir.

Brody•10mo ago

no problem!

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Proper Connecting String Syntax for Private Services