when using docker compose 3.8 getting 'version is unsupported' error

Question

I'm trying to use the latest docker compose version 3.8 but I keep getting "Version in ".\docker-compose.yml" is unsupported." error.

I'm using the latest version of Docker engine, 19.03.8 and Docker desktop, 2.2.0.5.

EDIT: Here is my docker compose version: docker-compose version 1.25.4, build 8d51620a

Here is my docker compose file:

version: "3.8"
services:
  portal:
    image: portal-dev
    ports:
      - "5000:80"
      - "4200:4200"
    container_name: portal
    build:
      context: .
      dockerfile: Dockerfile.dev
    environment:
      ASPNETCORE_ENVIRONMENT: Development
      DOTNET_SYSTEM_NET_HTTP_USESOCKETSHTTPHANDLER: 0

My docker compose file works using version 3.7. I can't figure out why it doesn't work using version 3.8. Can anyone help?

Answer 1

The 3.8 compose version was added in docker-compose 1.25.5 (ref: https://github.com/docker/compose/releases/tag/1.25.5 )

Docker Desktop 2.3 include the new version of compose but it's on the edge channel for now.

If you can/doesn't want to use the Edge Channel, you can download the latest version of docker-compose manually on the github release page https://github.com/docker/compose/releases