[SOLVED] when using docker compose 3.8 getting 'version is unsupported' error

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

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?

Solution

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