Docker 容器随机关闭

Question

赏金将在 4 小时后到期。 此问题的答案有资格获得+50声望赏金。 好的想提请更多注意这个问题：

我需要解释为什么我的容器会随机停止。 这个问题好几个月了

所以我有这个系统，我有 3 个 docker 容器同时运行来托管我的 API，一个用于 traefik，另外两个用于不同的 API（使用 FastAPI 以 python 编写）。 它工作了一段时间，但现在所有docker 容器似乎在几个小时后随机关闭。

这是所有错误消息output：

Exception in thread Thread-5:
Traceback (most recent call last):
  File "urllib3/connectionpool.py", line 677, in urlopen
  File "urllib3/connectionpool.py", line 392, in _make_request
  File "http/client.py", line 1277, in request
  File "http/client.py", line 1323, in _send_request
  File "http/client.py", line 1272, in endheaders
  File "http/client.py", line 1032, in _send_output
  File "http/client.py", line 972, in send
  File "docker/transport/unixconn.py", line 43, in connect
FileNotFoundError: [Errno 2] No such file or directory

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "requests/adapters.py", line 449, in send
  File "urllib3/connectionpool.py", line 727, in urlopen
  File "urllib3/util/retry.py", line 410, in increment
  File "urllib3/packages/six.py", line 734, in reraise
  File "urllib3/connectionpool.py", line 677, in urlopen
  File "urllib3/connectionpool.py", line 392, in _make_request
  File "http/client.py", line 1277, in request
  File "http/client.py", line 1323, in _send_request
  File "http/client.py", line 1272, in endheaders
  File "http/client.py", line 1032, in _send_output
  File "http/client.py", line 972, in send
  File "docker/transport/unixconn.py", line 43, in connect
urllib3.exceptions.ProtocolError: ('Connection aborted.', FileNotFoundError(2, 'No such file or directory'))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "threading.py", line 926, in _bootstrap_inner
  File "threading.py", line 870, in run
  File "compose/cli/log_printer.py", line 168, in tail_container_logs
  File "compose/cli/log_printer.py", line 185, in wait_on_exit
  File "compose/container.py", line 268, in wait
  File "docker/utils/decorators.py", line 19, in wrapped
  File "docker/api/container.py", line 1305, in wait
  File "docker/utils/decorators.py", line 46, in inner
  File "docker/api/client.py", line 233, in _post
  File "requests/sessions.py", line 578, in post
  File "requests/sessions.py", line 530, in request
  File "requests/sessions.py", line 643, in send
  File "requests/adapters.py", line 498, in send
requests.exceptions.ConnectionError: ('Connection aborted.', FileNotFoundError(2, 'No such file or directory'))

这是我的第一个 API（称为“层次结构”）的 docker-compose：

services:

  backend:
    build: ./
    restart: always
    labels:
      - traefik.enable=true

      - traefik.http.services.hierarchy_app.loadbalancer.server.port=80

      - traefik.http.routers.hierarchy-http.entrypoints=http
      - traefik.http.routers.hierarchy-http.rule=Host(`api.mydomain.me`)
      - traefik.docker.network=traefik-public

      - traefik.http.routers.hierarchy-https.entrypoints=https
      - traefik.http.routers.hierarchy-https.rule=Host(`api.mydomain.me`)
      - traefik.http.routers.hierarchy-https.tls=true

      - traefik.http.routers.hierarchy-https.tls.certresolver=le

      - traefik.http.middlewares.https-redirect.redirectscheme.scheme=https
      - traefik.http.middlewares.https-redirect.redirectscheme.permanent=true

      - traefik.http.routers.hierarchy-http.middlewares=https-redirect

    networks:
      - traefik-public

    volumes:
      - ${PWD}/hierarchy_app/commands.json:/hierarchy_app/commands.json:Z

networks:
  traefik-public:
    external: true

这是我的第二个 API（称之为“语音室”）的 docker-compose：

services:

  backend:
    build: ./
    restart: always
    labels:
      - traefik.enable=true

      - traefik.http.services.voicerooms_app.loadbalancer.server.port=80

      - traefik.http.routers.voicerooms-http.entrypoints=http
      - traefik.http.routers.voicerooms-http.rule=Host(`api.mydomain2.app`)
      - traefik.docker.network=traefik-public

      - traefik.http.routers.voicerooms-https.entrypoints=https
      - traefik.http.routers.voicerooms-https.rule=Host(`api.mydomain2.app`)
      - traefik.http.routers.voicerooms-https.tls=true

      - traefik.http.routers.voicerooms-https.tls.certresolver=le

      - traefik.http.middlewares.https-redirect.redirectscheme.scheme=https
      - traefik.http.middlewares.https-redirect.redirectscheme.permanent=true

      - traefik.http.routers.voicerooms-https.middlewares=https-redirect
    networks:
      - traefik-public

    volumes:
      - ${PWD}/voicerooms_app/commands.json:/voicerooms_app/commands.json:Z

networks:
  traefik-public:
    external: true

任何帮助将不胜感激，我一直试图解决这个问题一段时间:)

编辑：再向上滚动一点后，我在错误消息中发现了这一点：

backend_1  | [2022-01-10 02:04:51 +0000] [1] [INFO] Handling signal: term
backend_1  | [2022-01-10 02:04:51 +0000] [7] [INFO] Shutting down
backend_1  | [2022-01-10 02:04:51 +0000] [8] [INFO] Shutting down

我假设我的 docker 容器由于某种原因被终止，这是怎么回事？

Answer 1

我也遇到了和你一样的错误，我的问题是docker不启动。

检查 docker 状态

 systemctl status docker

systemctl start docker

docker-compose up try again

systemctl enable docker

在启动时启动。

或者

如果您使用的是 Mac，则可能意味着 Docker 本身没有运行。 我已经重新启动了我的 Mac，并且 Docker 没有设置为在登录时自动启动。 您可以将其设置为 Docker 首选项。

或者你可以通过运行 sudo systemctl start docker 然后运行 sudo docker-compose up 来解决这个问题

Answer 2

似乎您的应用程序出于某种原因试图使用不存在的文件，并且它没有正确管理异常，从而使您的应用程序退出并且您的容器停止。

确保您在应用程序requests/adapters.py中第 498 行的send方法被正确封装到Try...Except语句中。 此外，请确保记录异常，这将避免您的应用程序崩溃，但不会修复错误或根本原因 - 您必须单独调查。

Answer 3

您的应用程序由于某种原因而死亡，并且容器完成。 如何调试这是一个常见问题，我会以交互模式启动所有容器并检查发生了什么：

docker run --rm -p8080:80 -it <CONTAINER NAME>

而不是-p8080:80 （在主机的 8080 上公开容器的端口 80），添加您的网络设置...还添加您的容器需要的任何挂载/绑定/环境设置。

您也可以在bash中启动容器并手动启动您的命令：

docker run --rm -p8080:80 -it <CONTAINER NAME> /bin/bash

从现在开始，您必须找出您的应用程序出了什么问题。