Railway•4mo ago

Environment variables Railway error

Hello, I have a problem with environment variables within Railway. 11 days ago, my Next.js app was working correctly, but recently I deployed again and it failed. So, I added a Dockerfile, and the deploy worked. However, now the environment variables are not working. What am I missing? The enviroment variables are "NEXT_PUBLIC_BASE_URL" Attached the DockerFile Publish in my docker local and works correctly

Solution:

1. the ARG lines are commented out 2. these variables are needed during building of the next app, therefore you need to reference them in the same image layer that is responsible for building...

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13 Replies

Percy•4mo ago

Project ID: a2d0a173-be4f-421a-b1b0-ada4f0b76aa2

maldonadomoss•4mo ago

a2d0a173-be4f-421a-b1b0-ada4f0b76aa2

Brody•4mo ago

your dockerfile is missing the reference to NEXT_PUBLIC_BASE_URL and whatever other variables you may need, please read this https://docs.railway.app/guides/dockerfiles#using-variables-at-build-time

maldonadomoss•4mo ago

it didnt work Add to dockerFile ARG NEXT_PUBLIC_BASE_URL RUN echo $NEXT_PUBLIC_BASE_URL command run echo if see it value in build Logs Railway

Brody•4mo ago

show me the dockerfile you have now please please enclose that in a code block please enclose that in a code block

maldonadomoss•4mo ago

dockerFileSublimia.t...

Brody•4mo ago

that works too

Solution

Brody•4mo ago

1. the ARG lines are commented out 2. these variables are needed during building of the next app, therefore you need to reference them in the same image layer that is responsible for building

maldonadomoss•4mo ago

If the variable line 36 is present, (NEXT_PUBLIC_BASE_URL) The commented variables are only for testing

Brody•4mo ago

okay that solves 1. please read 2.

maldonadomoss•4mo ago

Thanks Its working

Brody•4mo ago

awesome

Duchess•2mo ago

New reply sent from Help Station thread:

what should i do about to fix it here, i have the same problem, the variables are not detected by railway:

FROM node:18-alpine3.16




# Create app directory
WORKDIR /app

# Install app dependencies
COPY package.json ./
COPY tsconfig.json ./

# Bundle app source
COPY . .



RUN npm install -g @nestjs/cli
RUN npm install --omit=dev


# railway env variables
ARG RAILWAY_PUBLIC_DOMAIN
ARG RAILWAY_PRIVATE_DOMAIN
ARG RAILWAY_PROJECT_NAME
ARG RAILWAY_ENVIRONMENT_NAME
ARG RAILWAY_SERVICE_NAME
ARG RAILWAY_PROJECT_ID
ARG RAILWAY_ENVIRONMENT_ID
ARG RAILWAY_SERVICE_ID
# app env variables
ARG DATABASE_URL
ARG JWT_SECRET
ARG JWT_EXPIRES_IN

ENV DATABASE_URL=$DATABASE_URL \
  JWT_SECRET=$JWT_SECRET \
  JWT_EXPIRES_IN=$JWT_EXPIRES_IN \
  RAILWAY_PUBLIC_DOMAIN=$RAILWAY_PUBLIC_DOMAIN \
  RAILWAY_PRIVATE_DOMAIN=$RAILWAY_PRIVATE_DOMAIN \
  RAILWAY_PROJECT_NAME=$RAILWAY_PROJECT_NAME \
  RAILWAY_ENVIRONMENT_NAME=$RAILWAY_ENVIRONMENT_NAME \
  RAILWAY_SERVICE_NAME=$RAILWAY_SERVICE_NAME \
  RAILWAY_PROJECT_ID=$RAILWAY_PROJECT_ID \
  RAILWAY_ENVIRONMENT_ID=$RAILWAY_ENVIRONMENT_ID \
  RAILWAY_SERVICE_ID=$RAILWAY_SERVICE_ID


RUN npm run build


ENV NODE_ENV=production
EXPOSE 3000


CMD ["npm", "run", "start:prod"]

FROM node:18-alpine3.16




# Create app directory
WORKDIR /app

# Install app dependencies
COPY package.json ./
COPY tsconfig.json ./

# Bundle app source
COPY . .



RUN npm install -g @nestjs/cli
RUN npm install --omit=dev


# railway env variables
ARG RAILWAY_PUBLIC_DOMAIN
ARG RAILWAY_PRIVATE_DOMAIN
ARG RAILWAY_PROJECT_NAME
ARG RAILWAY_ENVIRONMENT_NAME
ARG RAILWAY_SERVICE_NAME
ARG RAILWAY_PROJECT_ID
ARG RAILWAY_ENVIRONMENT_ID
ARG RAILWAY_SERVICE_ID
# app env variables
ARG DATABASE_URL
ARG JWT_SECRET
ARG JWT_EXPIRES_IN

ENV DATABASE_URL=$DATABASE_URL \
  JWT_SECRET=$JWT_SECRET \
  JWT_EXPIRES_IN=$JWT_EXPIRES_IN \
  RAILWAY_PUBLIC_DOMAIN=$RAILWAY_PUBLIC_DOMAIN \
  RAILWAY_PRIVATE_DOMAIN=$RAILWAY_PRIVATE_DOMAIN \
  RAILWAY_PROJECT_NAME=$RAILWAY_PROJECT_NAME \
  RAILWAY_ENVIRONMENT_NAME=$RAILWAY_ENVIRONMENT_NAME \
  RAILWAY_SERVICE_NAME=$RAILWAY_SERVICE_NAME \
  RAILWAY_PROJECT_ID=$RAILWAY_PROJECT_ID \
  RAILWAY_ENVIRONMENT_ID=$RAILWAY_ENVIRONMENT_ID \
  RAILWAY_SERVICE_ID=$RAILWAY_SERVICE_ID


RUN npm run build


ENV NODE_ENV=production
EXPOSE 3000


CMD ["npm", "run", "start:prod"]

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Environment variables Railway error