I’m running a Docker MERN stack on CentOS 7 with WHM, CPanels and Apache, everything works fine until I reboot the server. I get the following error on the webpage:
The proxy server received an invalid response from an upstream server. The proxy server could not handle the request Reason: Error reading from remote server Additionally, a 502 Bad Gateway error was encountered while trying to use an ErrorDocument to handle the request.
After searching around stackoverflow I found that if I run this sequence of commands my problem is solved:
iptables -t filter -F iptables -t filter -X systemctl restart docker
My question is, how do I configure my server so I don’t need to run these commands everytime my server reboots? Do I make a script to run these commands everytime it restarts? Do I configure iptables?
Source: Docker Questions