Situation - Creating a ESB cluster which are having separate cloud instances.
Load balancing will be done with NGINX Plus.
Configurations done and started the manager node.
It will indicate server is up correctly.
Error - When clicking on the management console link, it will provide an error called "502, Bad Gateway"
Analysis - This error providing by NGINX and it indicate can not access to relevant manager and worker nodes. This can be happen because all servers are down.
If servers are up, it may not have access to those servers. In this situation, all servers running on different clod instances which are having Centos (May be having Ubuntu, Windows or any other OS). Those instances are blocking access via enabled firewalls. So have to disable firewalls.
Then you may not getting the error.
Solution - In Centos, have a command to disable firewalls as follows:
service iptables stop
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