Traefik: Unable to obtain ACME certificate for domains

RancherOS
1 
traefik level=error msg="Unable to obtain ACME certificate for domains \"example.domain.com\": cannot get ACME client get directory at 'https://acme-v02.api.letsencrypt.org/directory': Get \"https://acme-v02.api.letsencrypt.org/directory\": dial tcp: lookup acme-v02.api.letsencrypt.org on 127.0.0.11:53: read udp 127.0.0.1:40126->127.0.0.11:53: i/o timeout" rule="Host(`example.domain.com`)" providerName=letsencrypt.acme routerName=traefik-secure@docker

Anyone could help me, please?

I did iptables -F and still problem persist, so it is not firewall.

2

The pod (or host it’s on) is configured to ask 127.0.0.11 for DNS to resolve the name to an IP to connect to. 127.* is all loopback, so the pod is asking itself for an answer, which fails to connect because it is not a DNS server.

3

Thanks for the reply. Do you know what and where to change?

I tried many things chatched from the internet, but none worked.