Traefik LetsEncrypt引发错误：DNS名称没有足够的标签，URL

Question

我正在使用HomelabOs和Traefik v 1.7.10。

我的Traefik Toml看起来像这样：

debug = false

logLevel = "ERROR"
defaultEntryPoints = ["http", "https"]

[entryPoints]
  [entryPoints.http]
  address = ":80"
  [entryPoints.https]
  address = ":443"
  [entryPoints.https.tls]

[retry]

[api]

[Docker]
  endpoint = "unix:///var/run/docker.sock"
  domain = "pinguinshow.com"
  watch = true
  exposedByDefault = false

[acme]
  email = "foo@myemail.com"
  storage = "acme.json"
  entryPoint = "https"
  onHostRule = true
  [acme.httpChallenge]
    entryPoint = "http"

总的来说，这很好。我可以在Traefik中看到许多前端，其中包括：

但是，如果我查看Traefik日志以检查LetsEncyrpt证书的状态，则会收到此错误：

time="2019-04-11T03:24:06Z" level=error msg="Unable to obtain ACME certificate for domains \"sync.\" detected thanks to rule \"Host:sync.\" : unable to generate a certificate for the domains [sync]: acme: error: 400 :: POST :: https://acme-v02.api.letsencrypt.org/acme/new-order :: urn:ietf:params:acme:error:malformed :: Error creating new order :: DNS name does not have enough labels, url: ",=

在#Traefik上和一个好人说话，他呢？建议traefik尝试为“ sync”而不是“ sync.pinguinshow.com”生成证书，但我不确定为什么？那样做。关于修复的任何建议吗？