I have a client using Astaro ASG 7.505 to load balance HTTP/S traffic on two identical web servers in a DMZ. The ASG rule looks to be set up correctly and appears to be balancing traffic to both servers.
However as part of the load balancing set up the ASG should be checking a URL to see if the web servers are up and running. The ASG manual says that if a web server returns an error of 5xx when checking the URL it will consider the web server down. At the moment this isn't the case!
I've set up a specific CGI script that only returns HTML error 500 in the header on one web server, and the other web server's identical CGI script returns a HTML page. Currently ASG sees both of the web server as "UP".
I've tried changing the check URL to both https://webserver.com.au/cgi-bin/testscript.cgi and also /cgi-bin/testscript.cgi, as per the ASG manual.
Is this a known bug in ASG 7.505 or am I doing something wrong?
What I want to do is to run a CGI script that checks all the functions of the web server then returns an error (that ASG sees as 'web server down') if the web server didn't pass all of it's internal checks, or returns a standard HTML page if everything is running smoothly. This way the web site (from the public's perspective) will continue to functions regardless if one web server isn't running correctly.
Any help/suggestions would be greatly appreciated.
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