Railway•11mo ago

Dockerfile with node alpine can't access database internal network

When I up a Dockerfile with a normal image from node, this is work, but when I up a Dockerfile with an image alpine they can't access the same database in internal network, someone can help me ?

Solution:

you are right, but they aren't running anything that uses the private network during build, their issues is because they are using an alpine image. https://docs.railway.app/guides/private-networking#workaround-for-alpine-based-images...

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24 Replies

Percy•11mo ago

Project ID: 8e7a534e-bfc1-40ca-a40a-9695fda79d5a

AbnerOP•11mo ago

8e7a534e-bfc1-40ca-a40a-9695fda79d5a

Adam•11mo ago

I may be wrong, but I believe private networking is not available during build, so you wouldn’t be able to reference a db in a dockerfile @Brody lmk if that’s right not sure what you’re doing in said dockerfile that requires a database. Can you elaborate on your use case?

AbnerOP•11mo ago

In my case I'm just using the dockerfile to configure the node version and then execute commands in the terminal through a .sh file, as I'm using Prisma I need to perform the generate and deploy commands, sorry for not explaining it before. I can put here Dockerfile for you see ?

Adam•11mo ago

for sure, go for it please wrap it in backticks so it shows as code

AbnerOP•11mo ago

# Use the official Node.js image as the base image
FROM node:20-alpine

# Set the working directory in the container
WORKDIR /usr/src/app

# Copy package.json and package-lock.json to the working directory
COPY package.json package-lock.json ./

# Install dependencies
RUN apk update && apk add bash
RUN npm install

# Copy the rest of the application code
COPY . .

# Expose the port the application will run on
EXPOSE 3000

# Command to start the application
CMD ["bash","migrate-and-start.sh"]

# Use the official Node.js image as the base image
FROM node:20-alpine

# Set the working directory in the container
WORKDIR /usr/src/app

# Copy package.json and package-lock.json to the working directory
COPY package.json package-lock.json ./

# Install dependencies
RUN apk update && apk add bash
RUN npm install

# Copy the rest of the application code
COPY . .

# Expose the port the application will run on
EXPOSE 3000

# Command to start the application
CMD ["bash","migrate-and-start.sh"]

migrate-and-start.sh:

#!/bin/sh
npm run build
npx prisma generate
npx prisma migrate deploy
npm run start:dev

#!/bin/sh
npm run build
npx prisma generate
npx prisma migrate deploy
npm run start:dev

Adam•11mo ago

Try removing your start command from your Dockerfile and add it as a start command in your Railway service or in a railway.json https://docs.railway.app/guides/config-as-code Right now you're starting your service in your dockerfile, which would start it in your build steph which is why it's failing.

AbnerOP•11mo ago

hummm that makes sense , but when i change the image ( FROM) for a version normal node like node:21 it's work and i don't recive this erros ( i don't know why )

Adam•11mo ago

I wouldn’t know why either

AbnerOP•11mo ago

i try use a config as code, but i don't know i do this corret skskksks

AbnerOP•11mo ago

it's right ?

AbnerOP•11mo ago

Solution

Brody•11mo ago

go back to this dockerfile (no need for a railway.json) and a tip, you don't need to install bash, just use sh instead

AbnerOP•11mo ago

ho it's work !!!!!

Brody•11mo ago

you added the alpine specific variable right?

AbnerOP•11mo ago

Thanks so much @Adam and @Brody, you guys are awesome you say that rigth ENABLE_ALPINE_PRIVATE_NETWORKING=true ?

Brody•11mo ago

I'm just now noticing this, please please do not run a development server on railway

AbnerOP•11mo ago

you say about

 npm run start:dev

 npm run start:dev

Brody•11mo ago

yes

AbnerOP•11mo ago

Even if it is a development environment ?

Brody•11mo ago

development servers cost more to run and come with increased instabilities and much lower performance

AbnerOP•11mo ago

oww ok, i don't have no idea about that, i will change that

Brody•11mo ago

sounds good

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Dockerfile with node alpine can't access database internal network