Add FROM docker image build variable in docker compose

Question

I'm trying to build a docker image using a variable for my FROM docker base image

Docker Compose

version: "3.7"
services:
  app:
    build:
      context: "."
      dockerfile: .docker/Dockerfile
    working_dir: /ionic-app
    environment:
      NODE_VER: 12.16.0

Dockerfile

# Create Basic docker file 
FROM node:${NODE_VER}

But this doesn't work I get, I've read that this isn't possible or that you need to add build arguments for this to work?

ERROR: Service 'ionic-app' failed to build: invalid reference format

Is this possible? I want to make it so when Node updates their LTS version I'll easily be able to change versions via arguments.

bug · Accepted Answer · 2020-02-13 23:14:57Z

1

You can do it using arguments:

Dockerfile

ARG NODE_VER=latest
FROM node:$NODE_VER
...

Docker Compose

version: "3.7"
services:
  app:
    build:
      context: "."
      dockerfile: .docker/Dockerfile
      args:
        NODE_VER: "12.16.0"
    working_dir: /ionic-app

answered Feb 13, 2020 at 23:14

bug

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