docker - HEALTHCHECK启动容器进程导致无效的环境USERNAME

Question

将健康检查添加到我的docker文件后:

HEALTHCHECK --interval=2m --timeout=30s --retries=5 CMD curl -r http://localhost:1234/healthstatus || exit 1

我在docker ps的状态下收到不健康的警报(容器已启动):
大约一个小时(不健康)

CONTAINER ID        IMAGE                                                                      COMMAND                  CREATED             STATUS                         PORTS                                          NAMES
jdhfjksdhfk        my_docker_register/my_service                   "/usr/src/app/entr..."   About an hour ago   Up About an hour (unhealthy)   0.0.0.0:1234->1234/tcp, 0.0.0.0:80->1234/tcp   my_service

检查运行状况日志后，我可以看到输出:

docker inspect --format=’{{json .State}}’ my_service | jq .

{ “Health”: { “Log”: [ { “Output”: “rpc error: code = 2 desc = oci runtime error: exec failed: container_linux.go:247: starting container process caused “invalid environment ‘USERNAME’”\n”, “ExitCode”: -1, “End”: “2017-12-10T10:28:42.274606327Z”, “Start”: “2017-12-10T10:28:42.241716647Z” }, { “Output”: “rpc error: code = 2 desc = oci runtime error: exec failed: container_linux.go:247: starting container process caused “invalid environment ‘USERNAME’”\n”, “ExitCode”: -1, “End”: “2017-12-10T10:30:42.313609006Z”, “Start”: “2017-12-10T10:30:42.274847833Z” }, { “Output”: “rpc error: code = 2 desc = oci runtime error: exec failed: container_linux.go:247: starting container process caused “invalid environment ‘USERNAME’”\n”, “ExitCode”: -1, “End”: “2017-12-10T10:32:42.347550172Z”, “Start”: “2017-12-10T10:32:42.313834355Z” }, { “Output”: “rpc error: code = 2 desc = oci runtime error: exec failed: container_linux.go:247: starting container process caused “invalid environment ‘USERNAME’”\n”, “ExitCode”: -1, “End”: “2017-12-10T10:34:42.380622433Z”, “Start”: “2017-12-10T10:34:42.347742726Z” } ], “FailingStreak”: 4, “Status”: “starting” },

当我使用相同的命令执行docker exec时，效果很好:

docker exec -it my_service curl -r http://localhost:1234/healthstatus || exit 1

输出:好

任何想法如何解决这个问题？

Answer 1

所以我的问题实际上是由于在我的docker compose文件中配置了环境变量' USERNAME '而导致的，但是它的值是 null

version: "2"
services:
  my-service:
    image: registry/ramp-webapp
    restart: always
    environment:
      NODE_ENV: {{node_env}}
      USERNAME:
      CONSUL_AGENT_HOST: {{ ansible_eth0.ipv4.address }}
    ports:
      - "80:80"
    container_name: my-service
    volumes:
      - /var/log/my-service:/var/log/my-service

我真的不知道为什么设置为null的环境变量会导致此问题。

我的解决方案是 从docker compose中删除USERNAME环境变量