No ipv6 to connect to postgres instance

karthikkolli

PRO

a month ago

I am using python:3.11-slim to build a backend server. It is unable to connect to the postgres server using private ip. Public IP works. Both are in same project. Also i tried ssh-ing into the server and then installed psql and tried to connect to postgres instance. Same error.

root@36c97201e3be:/app# psql -h postgres.railway.internal -p 5432 -U postgres -d railway

psql: error: could not translate host name "postgres.railway.internal" to address: Name or service not known

My railway.json file:

{
  "$schema": "https://railway.app/railway.schema.json",
  "build": {
    "builder": "DOCKERFILE",
    "dockerfilePath": "Dockerfile"
  },
  "deploy": {
    "restartPolicyType": "ON_FAILURE",
    "restartPolicyMaxRetries": 10
  }
}

I dont understand the problem.

Solved$10 Bounty

3 Replies

Railway

BOT

a month ago

Hey there! We've found the following might help you get unblocked faster:

If you find the answer from one of these, please let us know by solving the thread!

parmstar

EMPLOYEE

a month ago

I don't see a Postgres service in this project?

Status changed to Awaiting User Response Railway • about 1 month ago

karthikkolli

PRO

a month ago

I deleted it and created a new one with pgvector. Name is mentordb

This is from ssh from matchme-backend instance

root@1dda1f265d8d:/app# wget pgvector.railway.internal

--2025-08-06 17:05:21-- http://pgvector.railway.internal/

Resolving pgvector.railway.internal (pgvector.railway.internal)... failed: Name or service not known.

wget: unable to resolve host address ‘pgvector.railway.internal’

Status changed to Awaiting Railway Response Railway • about 1 month ago

Status changed to Solved karthikkolli • about 1 month ago