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dockerdocker-composeyaml
krokodilko
krokodilko

Reputation: 36107

docker-compose yaml - mapping values are not allowed here

What is wrong with my docker-compose.yml file ?

docker-compose complains:

docker-compose up                                                                                                             ERROR: yaml.scanner.ScannerError: mapping values are not allowed here
  in ".\docker-compose.yml", line 7, column 16

This is my socker-compose.yml

version: '2.0'
services:
  cass1:
    image: cassandra
  cass2:
    image cassandra
    environment:
      - CASSANDRA_SEEDS=cass1
    depends_on:
      - "cass1"
  cass4:
    image cassandra
    environment:
      - CASSANDRA_SEEDS=cass1     
    depends_on:
      - "cass1"

I'am looking at the docker-compose's documentation here: https://docs.docker.com/compose/environment-variables/ and this example is similar to my file:

Set environment variables in containers

You can set environment variables in a service’s containers with the ‘environment’ key, just like with docker run -e VARIABLE=VALUE ...:

web:
  environment:
    - DEBUG=1

Upvotes: 0

Views: 1701

Answers (1)

Ivan Velichko
Ivan Velichko

Reputation: 6709

You missed the colon on the previous line. Change image cassandra to image: cassandra.

Upvotes: 2

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