404 page not found error (Unable to obtain ACME certificate for domains)

Questions
1

Install N8N on Ubuntu 20.4 and get this error when try to login to my n8n website

image

My error log traefik container

root@ubuntu-2vcpu-2gb-1-0w2ib:/home# docker logs c0729c92ebf9
time="2023-09-27T16:06:50Z" level=info msg="Configuration loaded from flags."
time="2023-09-27T16:07:12Z" level=error msg="Unable to obtain ACME certificate for domains \"n8n.ghn.vn\": unable to generate a certificate for the domains [n8n.ghn.vn]: error: one or more domains had a problem:\n[n8n.ghn.vn] acme: error: 400 :: urn:ietf:params:acme:error:dns :: no valid A records found for n8n.ghn.vn; no valid AAAA records found for n8n.ghn.vn\n" rule="Host(`n8n.ghn.vn`)" providerName=mytlschallenge.acme ACME CA="https://acme-v02.api.letsencrypt.org/directory" routerName=n8n@docker
time="2023-09-27T16:07:16Z" level=error msg="Unable to obtain ACME certificate for domains \"n8n.ghn.vn\": unable to generate a certificate for the domains [n8n.ghn.vn]: error: one or more domains had a problem:\n[n8n.ghn.vn] acme: error: 400 :: urn:ietf:params:acme:error:dns :: no valid A records found for n8n.ghn.vn; no valid AAAA records found for n8n.ghn.vn\n" ACME CA="https://acme-v02.api.letsencrypt.org/directory" routerName=n8n@docker rule="Host(`n8n.ghn.vn`)" providerName=mytlschallenge.acme
time="2023-09-27T16:07:23Z" level=error msg="Unable to obtain ACME certificate for domains \"n8n.ghn.vn\": unable to generate a certificate for the domains [n8n.ghn.vn]: error: one or more domains had a problem:\n[n8n.ghn.vn] acme: error: 400 :: urn:ietf:params:acme:error:dns :: no valid A records found for n8n.ghn.vn; no valid AAAA records found for n8n.ghn.vn\n" providerName=mytlschallenge.acme ACME CA="https://acme-v02.api.letsencrypt.org/directory" routerName=n8n@docker rule="Host(`n8n.ghn.vn`)"
time="2023-09-27T17:08:03Z" level=error msg="accept tcp [::]:443: use of closed network connection" entryPointName=websecure
time="2023-09-27T17:08:03Z" level=error msg="Error while starting server: accept tcp [::]:443: use of closed network connection" entryPointName=websecure
time="2023-09-27T17:08:03Z" level=error msg="accept tcp [::]:80: use of closed network connection" entryPointName=web
time="2023-09-27T17:08:03Z" level=error msg="close tcp [::]:80: use of closed network connection" entryPointName=web
time="2023-09-27T17:08:03Z" level=error msg="accept tcp [::]:8080: use of closed network connection" entryPointName=traefik
time="2023-09-27T17:08:03Z" level=error msg="Error while starting server: accept tcp [::]:8080: use of closed network connection" entryPointName=traefik
time="2023-09-27T17:08:06Z" level=info msg="Configuration loaded from flags."
time="2023-09-27T17:08:18Z" level=error msg="Unable to obtain ACME certificate for domains \"n8n.ghn.vn\": unable to generate a certificate for the domains [n8n.ghn.vn]: error: one or more domains had a problem:\n[n8n.ghn.vn] acme: error: 400 :: urn:ietf:params:acme:error:dns :: no valid A records found for n8n.ghn.vn; no valid AAAA records found for n8n.ghn.vn\n" ACME CA="https://acme-v02.api.letsencrypt.org/directory" routerName=n8n@docker rule="Host(`n8n.ghn.vn`)" providerName=mytlschallenge.acme
time="2023-09-27T17:08:24Z" level=error msg="Unable to obtain ACME certificate for domains \"n8n.ghn.vn\": unable to generate a certificate for the domains [n8n.ghn.vn]: error: one or more domains had a problem:\n[n8n.ghn.vn] acme: error: 400 :: urn:ietf:params:acme:error:dns :: no valid A records found for n8n.ghn.vn; no valid AAAA records found for n8n.ghn.vn\n" providerName=mytlschallenge.acme ACME CA="https://acme-v02.api.letsencrypt.org/directory" routerName=n8n@docker rule="Host(`n8n.ghn.vn`)"
time="2023-09-27T17:08:27Z" level=error msg="Unable to obtain ACME certificate for domains \"n8n.ghn.vn\": unable to generate a certificate for the domains [n8n.ghn.vn]: error: one or more domains had a problem:\n[n8n.ghn.vn] acme: error: 400 :: urn:ietf:params:acme:error:dns :: no valid A records found for n8n.ghn.vn; no valid AAAA records found for n8n.ghn.vn\n" providerName=mytlschallenge.acme ACME CA="https://acme-v02.api.letsencrypt.org/directory" routerName=n8n@docker rule="Host(`n8n.ghn.vn`)"
time="2023-09-27T17:08:30Z" level=error msg="Unable to obtain ACME certificate for domains \"n8n.ghn.vn\": unable to generate a certificate for the domains [n8n.ghn.vn]: error: one or more domains had a problem:\n[n8n.ghn.vn] acme: error: 400 :: urn:ietf:params:acme:error:dns :: no valid A records found for n8n.ghn.vn; no valid AAAA records found for n8n.ghn.vn\n" rule="Host(`n8n.ghn.vn`)" routerName=n8n@docker providerName=mytlschallenge.acme ACME CA="https://acme-v02.api.letsencrypt.org/directory"

I have already create A record point to my VPS sever DNS on Cloudflare
My docker-compose.yml is the same with the installation guide

Thank you !

3

here is my log

root@ubuntu-2vcpu-2gb-1-0w2ib:~# sudo docker compose up
[+] Running 2/2
 ✔ Container root-traefik-1  Running                                                           0.0s
 ✔ Container root-n8n-1      Recreated                                                         3.1s
Attaching to root-n8n-1, root-traefik-1
root-traefik-1  | time="2023-09-28T07:52:12Z" level=error msg="Unable to obtain ACME certificate for domains \"n8n.ghn.vn\": unable to generate a certificate for the domains [n8n.ghn.vn]: error: one or more domains had a problem:\n[n8n.ghn.vn] acme: error: 400 :: urn:ietf:params:acme:error:dns :: no valid A records found for n8n.ghn.vn; no valid AAAA records found for n8n.ghn.vn\n" rule="Host(`n8n.ghn.vn`)" routerName=n8n@docker ACME CA="https://acme-v02.api.letsencrypt.org/directory" providerName=mytlschallenge.acme
root-n8n-1      | n8n ready on 0.0.0.0, port 5678
root-n8n-1      | Initializing n8n process
root-n8n-1      | Version: 1.8.2
root-n8n-1      |
root-n8n-1      | Editor is now accessible via:
root-n8n-1      | https://n8n.ghn.vn:5678/
root-traefik-1  | time="2023-09-28T07:52:23Z" level=error msg="Unable to obtain ACME certificate for domains \"n8n.ghn.vn\": unable to generate a certificate for the domains [n8n.ghn.vn]: error: one or more domains had a problem:\n[n8n.ghn.vn] acme: error: 400 :: urn:ietf:params:acme:error:dns :: no valid A records found for n8n.ghn.vn; no valid AAAA records found for n8n.ghn.vn\n" rule="Host(`n8n.ghn.vn`)" ACME CA="https://acme-v02.api.letsencrypt.org/directory" providerName=mytlschallenge.acme routerName=n8n@docker
root-traefik-1  | time="2023-09-28T07:52:27Z" level=error msg="Unable to obtain ACME certificate for domains \"n8n.ghn.vn\": unable to generate a certificate for the domains [n8n.ghn.vn]: error: one or more domains had a problem:\n[n8n.ghn.vn] acme: error: 400 :: urn:ietf:params:acme:error:dns :: no valid A records found for n8n.ghn.vn; no valid AAAA records found for n8n.ghn.vn\n" rule="Host(`n8n.ghn.vn`)" ACME CA="https://acme-v02.api.letsencrypt.org/directory" providerName=mytlschallenge.acme routerName=n8n@docker
root-traefik-1  | time="2023-09-28T07:52:28Z" level=error msg="Unable to obtain ACME certificate for domains \"n8n.ghn.vn\": unable to generate a certificate for the domains [n8n.ghn.vn]: acme: error: 429 :: POST :: https://acme-v02.api.letsencrypt.org/acme/new-order :: urn:ietf:params:acme:error:rateLimited :: Error creating new order :: too many failed authorizations recently: see https://letsencrypt.org/docs/failed-validation-limit/" ACME CA="https://acme-v02.api.letsencrypt.org/directory" providerName=mytlschallenge.acme routerName=n8n@docker rule="Host(`n8n.ghn.vn`)"
4

if i go to the https://n8n.mydomain:5678/ it will show

This site can’t be reached

Check if there is a typo in n8n.ghn.vn.

  • If spelling is correct, [try running Windows Network Diagnostics](javascript:diagnoseErrors()).

DNS_PROBE_FINISHED_NXDOMAIN

6

Hi @Phuc_Nguy_n_H_ng, welcome to the community!

From looking into the logs it appears Let’s Encrypt can’t find the DNS records for your domain:

error: 400 :: urn:ietf:params:acme:error:dns :: no valid A records found for n8n.ghn.vn; no valid AAAA records found for n8n.ghn.vn

Quickly querying popular nameservers such as 1.1.1.1 (Cloudflare) or 8.8.8.8 (Google) on my end suggests there are indeed no A records:

image

image
image815×373 39 KB

Did you perhaps simply forget to create an A record for n8n.ghn.vn pointing to your server?

7

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