All Domains show Nginx 502 error

This happens when a third party user/service restarted docker and the floatingip service failed to reload the /etc/hosts file with new docker private IP addresses.

To resolve this issue, run:

opencli server-recreate_hosts

Then restart Nginx service:

• soft restart (reload without downtime):

  docker exec nginx bash -c "nginx -t && nginx -s reload"
  
• hard restart (stop and start again):

  docker restart nginx