Docker-compose up时报错：

Docker-compose up时报错：

ERROR: yaml.scanner.ScannerError: mapping values are not allowed here
in "./docker-compose.yml", line 2, column 9

解决

出现这个错误的是因为yaml格式不正确,谷歌定义的yaml格式太严格了,每个冒号后面都必须带有空格

错误

version:"3"
services:
  web:   
    image: licerlee/friendlyhello:v1
    deploy:
      replicas:5
      resources:
        limits:
          cpus:"0.1"
          memory:50M
      restart_policy:
        condition: on-failure
    ports:
      - "80:80"
    networks:
      - webnet
networks:
  webnet:

正确

version: "3"
services:
  web:
image<span class="token punctuation">:</span> licerlee<span class="token operator">/</span>friendlyhello<span class="token punctuation">:</span>v1
deploy<span class="token punctuation">:</span>
  replicas<span class="token punctuation">:</span> <span class="token number">5</span>
  resources<span class="token punctuation">:</span>
    limits<span class="token punctuation">:</span>
      cpus<span class="token punctuation">:</span> <span class="token string">"0.1"</span>
      memory<span class="token punctuation">:</span> <span class="token number">50</span>M
  restart_policy<span class="token punctuation">:</span>
    condition<span class="token punctuation">:</span> on<span class="token operator">-</span>failure
ports<span class="token punctuation">:</span>
  <span class="token operator">-</span> <span class="token string">"80:80"</span>
networks<span class="token punctuation">:</span>
  <span class="token operator">-</span> webnet

networks:

webnet: