'./docker-compose.yml'，服务必须是映射，而不是NoneType [英] './docker-compose.yml', service must be a mapping, not a NoneType

问题描述

当我运行： COMPOSE_PROJECT_NAME = zk_test docker-compose up 时，出现错误提示

When I ran: COMPOSE_PROJECT_NAME=zk_test docker-compose up, I got error saying

错误：在文件'./docker-compose.yml'中，服务必须是映射，而不是
a NoneType。。

"ERROR: In file './docker-compose.yml', service must be a mapping, not a NoneType.".

这是我的yml文件：

version: '2'
services:
zoo1:
image: zookeeper
restart: always
container_name: zoo1
ports:
- "2181:2181"
environment:
ZOO_MY_ID: 1
ZOO_SERVERS: server.1=zoo1:2888:3888 server.2=zoo2:2888:3888 server.3=zoo3:2888:3888

zoo2:
image: zookeeper
restart: always
container_name: zoo2
ports:
- "2182:2181"
environment:
ZOO_MY_ID: 2
ZOO_SERVERS: server.1=zoo1:2888:3888 server.2=zoo2:2888:3888 server.3=zoo3:2888:3888

zoo3:
image: zookeeper
restart: always
container_name: zoo3
ports:
- "2183:2181"
environment:
ZOO_MY_ID: 3
ZOO_SERVERS: server.1=zoo1:2888:3888 server.2=zoo2:2888:3888 server.3=zoo3:2888:3888

示例图片：

推荐答案

YAML取决于缩进。此

YAML is indentation dependent. This

services:
zoo1:

是具有两个键的映射，这两个键都映射到 null （即 None

is a mapping with two keys that both map to null (i.e. None in Python).

其中：

services:
   zoo1:

是嵌套在映射中的映射。密钥服务的值与密钥 zoo1 的映射关系相同（该映射的值再次为 null ）。

is a mapping nested in a mapping. The key 'services' has as value a mapping with key zoo1 (which again has a value null).

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