Question

我正在使用docker-compose设置容器堆栈。然而，通过运行

docker-compose up

我收到一条相当神秘的错误消息：

Traceback (most recent call last):
  File "/usr/local/bin/docker-compose", line 9, in <module>
    load_entry_point('docker-compose==1.4.2', 'console_scripts', 'docker-compose')()
  File "/usr/local/lib/python2.7/dist-packages/compose/cli/main.py", line 39, in main
    command.sys_dispatch()
  File "/usr/local/lib/python2.7/dist-packages/compose/cli/docopt_command.py", line 21, in sys_dispatch
    self.dispatch(sys.argv[1:], None)
  File "/usr/local/lib/python2.7/dist-packages/compose/cli/command.py", line 27, in dispatch
    super(Command, self).dispatch(*args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/compose/cli/docopt_command.py", line 24, in dispatch
    self.perform_command(*self.parse(argv, global_options))
  File "/usr/local/lib/python2.7/dist-packages/compose/cli/command.py", line 57, in perform_command
    verbose=options.get('--verbose'))
  File "/usr/local/lib/python2.7/dist-packages/compose/cli/command.py", line 78, in get_project
    config.load(config_details),
  File "/usr/local/lib/python2.7/dist-packages/compose/config.py", line 138, in load
    for service_name, service_dict in list(dictionary.items()):
AttributeError: 'NoneType' object has no attribute 'items'

如何调试？我已经检查过yml是否有效，但它不起作用。

Answer 1

我忘了保存docker-compose.yml，所以它是空的。

我偶然发现了this issue about making the error message better中描述行为的解决方案。

如果根本不存在docker-compose.yml，则会收到一条好消息：

Can't find a suitable configuration file in this directory or any parent. Are you in the right directory?
Supported filenames: docker-compose.yml, docker-compose.yaml, fig.yml, fig.yaml

这是anounced on the docker-compose's issue列表，在upcomming 1.5版本中会有一个更好的错误消息：

Top level object needs to be a dictionary. Check your .yml file that
you have defined a service at the top level.

从版本1.7.1开始，指示您的文件为空的错误消息显示为：

ERROR: Top level object in './docker-compose.yml' needs to be an
object not '<type 'NoneType'>'.

如何验证我的docker-compose.yml？

1 个答案: