Traefik 错误转发 EOF / Bad Gateway（让我们加密相关）

Question

我正在尝试通过 Docker 在公共服务器上设置 Cryptpad，可通过 Traefik 访问。我已经设置了 Traefik 以及 Cryptpad，但到目前为止，在导航到 http://cryptpad.myserver.com （重定向到 https，如专门配置）时，我在浏览器中收到 Bad Gateway 错误，并且在 treafik 容器的日志中出现以下错误：

level=warning msg="Error forwarding to https://172.19.0.2:3000, err: EOF"

此外，另一个可能相关的问题是，Let's Encrypt 似乎无法为cryptpad.myserver.com 和monitor.myserver.com 颁发证书（我按照https://www.digitalocean.com/community/tutorials/how-to-use-traefik-as-a-reverse-proxy-for-docker-containers-on-ubuntu-16-04 此处的说明进行了配置）。

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编辑： Bad Gateway 问题似乎确实源于未能创建有效证书，因为我可以通过 Traefik 通过纯 HTTP 访问 Cryptpad（当然是在关闭相关的 HTTPS 配置之后）。此问题的标题已进行相应编辑以反映这种关系。

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例如，当尝试访问 https://monitor.myserver.com 时，我在 traefik 容器的日志中收到以下错误：

time="2018-01-10T13:53:37Z" level=info msg="Server configuration reloaded on :9080" 
time="2018-01-10T13:53:37Z" level=info msg="Server configuration reloaded on :9443" 
time="2018-01-10T13:53:37Z" level=debug msg="LoadCertificateForDomains [monitor.myserver.com]..." 
time="2018-01-10T13:53:37Z" level=debug msg="Look for provided certificate to validate [monitor.myserver.com]..." 
time="2018-01-10T13:53:37Z" level=debug msg="No provided certificate found for domains [monitor.myserver.com], get ACME certificate." 
time="2018-01-10T13:53:37Z" level=debug msg="Loading ACME certificates [monitor.myserver.com]..." 
time="2018-01-10T13:53:37Z" level=warning msg="A new release has been found: 1.4.6. Please consider updating." 
time="2018-01-10T13:53:37Z" level=error msg="map[monitor.myserver.com:[monitor.myserver.com] acme: Could not determine solvers]" 
time="2018-01-10T13:53:37Z" level=error msg="Error getting ACME certificates [monitor.myserver.com] : Cannot obtain certificates map[monitor.myserver.com:[monitor.myserver.com] acme: Could not determine solvers]+v" 

同样，当尝试访问 http://cryptpad.myserver.com 时，会记录以下 ssl 错误（以上述 EOF / Bad Gateway 错误结尾）：

time="2018-01-10T11:59:18Z" level=info msg="Server configuration reloaded on :9443" 
time="2018-01-10T11:59:18Z" level=info msg="Server configuration reloaded on :9080" 
time="2018-01-10T11:59:18Z" level=debug msg="LoadCertificateForDomains [cryptpad.myserver.com]..." 
time="2018-01-10T11:59:18Z" level=debug msg="Look for provided certificate to validate [cryptpad.myserver.com]..." 
time="2018-01-10T11:59:18Z" level=debug msg="No provided certificate found for domains [cryptpad.myserver.com], get ACME certificate." 
time="2018-01-10T11:59:18Z" level=debug msg="Loading ACME certificates [cryptpad.myserver.com]..." 
time="2018-01-10T11:59:18Z" level=error msg="map[cryptpad.myserver.com:[cryptpad.myserver.com] acme: Could not determine solvers]" 
time="2018-01-10T11:59:18Z" level=error msg="Error getting ACME certificates [cryptpad.myserver.com] : Cannot obtain certificates map[cryptpad.myserver.com:[cryptpad.myserver.com] acme: Could not determine solvers]+v" 
time="2018-01-10T11:59:52Z" level=debug msg="Look for provided certificate to validate [cryptpad.myserver.com]..." 
time="2018-01-10T11:59:52Z" level=debug msg="No provided certificate found for domains [cryptpad.myserver.com], get ACME certificate." 
time="2018-01-10T11:59:52Z" level=debug msg="Challenge GetCertificate cryptpad.myserver.com" 
time="2018-01-10T11:59:52Z" level=debug msg="ACME got nothing cryptpad.myserver.com" 
time="2018-01-10T11:59:52Z" level=debug msg="Look for provided certificate to validate [cryptpad.myserver.com]..." 
time="2018-01-10T11:59:52Z" level=debug msg="No provided certificate found for domains [cryptpad.myserver.com], get ACME certificate." 
time="2018-01-10T11:59:52Z" level=debug msg="Challenge GetCertificate cryptpad.myserver.com" 
time="2018-01-10T11:59:52Z" level=debug msg="ACME got nothing cryptpad.myserver.com" 
time="2018-01-10T11:59:52Z" level=warning msg="Error forwarding to https://172.19.0.2:3000, err: EOF" 

以下是 Traefik 的 docker-compose.yml 文件及其 traefik.toml 文件（均通过参考上述指南 [via Digital Ocean] 和 Traefik 自己的 https://docs.traefik.io/user-guide/docker-and-lets-encrypt/ 进行配置）：

version: '2'

services:
  traefik:
    image: traefik
    networks:
      - proxy
    ports:
      - "9080:9080"
      - "9443:9443"
      - "8080:8080"
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
      - /opt/traefik/traefik.toml:/traefik.toml
      - /opt/traefik/acme.json:/acme.json
    labels:
      - "traefik.frontend.rule=Host:monitor.myserver.com"
      - "traefik.port=8080"
    container_name: traefik

networks:
  proxy:
    external: true

traefik.toml:

checkNewVersion = true
logLevel = "DEBUG"
defaultEntryPoints = ["http", "https"]

[entryPoints]
    [entryPoints.http]
    address = ":9080"
        [entryPoints.http.redirect]
            entryPoint = "https"
    [entryPoints.https]
    address = ":9443"
        [entryPoints.https.tls]

[retry]

[acme]
email = "example@myserver.com"
storage = "acme.json"
entryPoint = "https"
onHostRule = true
onDemand = false

[web]

address = ":8080"

[docker]
endpoint = "unix:///var/run/docker.sock"
domain = "myserver.com"
watch = true
exposedbydefault = false

这里是 Cryptpad 的 .env 和 docker-compose.yml 文件，我收到并根据 https://github.com/xwiki-labs/cryptpad/blob/master/docs/cryptpad-docker.md 和前面提到的指南进行了编辑：

VERSION=latest
USE_SSL=true
STORAGE='./storage/file'
LOG_TO_STDOUT=true

docker-compose.yml

version: '2'
services:

  cryptpad:
    build:
      context: .
      args:
        - VERSION=${VERSION}
    image: "xwiki/cryptpad:${VERSION}"
    hostname: cryptpad

    labels:
      - "traefik.backend=cryptpad"
      - "traefik.docker.network=proxy"
      - "traefik.frontend.rule=Host:cryptpad.myserver.com"
      - "traefik.enable=true"
      - "traefik.port=3000"
      - "traefik.frontend.passHostHeader=true"
      - "traefik.default.protocol=https"
    environment:
      - USE_SSL=${USE_SSL}
      - STORAGE=${STORAGE}
      - LOG_TO_STDOUT=${LOG_TO_STDOUT}
    restart: always
    volumes:
      - ./data/files:/cryptpad/datastore:rw
      - ./data/customize:/cryptpad/customize:rw
    networks:
      - proxy
      - default
    expose:
      - "3000"

networks:
  proxy:
    external: true

任何帮助将不胜感激。 & 当然，如有必要，我可以提供更多详细信息。

Answer 1

我认为您遇到了这个问题：

https://community.letsencrypt.org/t/solution-client-with-the-currently-selected-authenticator-does-not-support-any-combination-of-challenges-that-will-satisfy-the-ca/49983

显然，由于安全问题，letsencrypt 已禁用 TLS-SNI-01。这是问题的链接：https://community.letsencrypt.org/t/2018-01-09-issue-with-tls-sni-01-and-shared-hosting-infrastructure/49996

看起来 letencrypt 需要几天时间才能再次启用它。