Docker Nginx stopped: [emerg] 1#1: host not found in upstream

Question

I am running docker-nginx on ECS server. My nginx service is suddenly stopped because the proxy_path of one of the servers got unreachable. The error is as follows:

Answer 1

Include to prevent Nginx from crashing if your site is down, include a resolver directive, as follows:

 server {
       listen      80;
       server_name     test.com;
       location / {
          resolver 8.8.8.8
          proxy_pass         http://dev-exapmle.io:5016/;
          proxy_redirect     off;
 ...

WARNING! Using a public DNS create a security risk in your backend since your DNS requests can be spoofed. If this is an issue, you should point the resolver to a secure DNS server.