Simple "Hello World" iRule

Hi Scott,

 

 

The iRule is well written. And you should have a Hello World( not a well formatted xml output, but at least you should have it)

 

Have you configured the VS with this iRule?

 

 

Try to add a log

 

 

when HTTP_REQUEST {

 

if { [HTTP::uri] eq "/mytest" } {

 

set response "Hello World"

 

log local0. $response

 

HTTP::respond 200 content $response "Content-Type" "text/xml"

 

}

 

}

 

 

or something like this :)

 

 

Ps: you can avoid using the response variable : HTTP::respond 200 content "Hello World" "Content-Type" "text/xml"

 

bmw,

 

 

Thanks for the quick response!

 

 

 

I changed my iRule to the following:

 

 

 

when HTTP_REQUEST {

 

if { [HTTP::uri] eq "/mytest" } {

 

log local0. "Hello World"

 

HTTP::respond 200 content "Hello World" "Content-Type" "text/xml"

 

}

 

}

 

 

 

 

I added it in with the xui iRule utility, so as far as I know it should be up and running. However, I still don't seem to be getting any response. Does the log local0 line write to /var/log/ltm, or is the default location somewhere else? Also, am I calling the URL correctly to trigger this rule?

 

 

 

Thanks!

 

Worked fine for me:

 

 

 

Invalid at the top level of the document. Error processing resource 'http://test.domain.com/mytest'. Line 1, Position 1

 

 

Hello World

 

^

 

 

With your "eq" if you have anything else (including a trailing slash, the it will not qualify). You could use starts_with instead and see if you get it to work for you.

 

 

The "log local0." will log to the /var/log/ltm. You are calling it correctly in your iRule.

I'm starting to think HTTP_REQUEST isn't configured properly on my F5. I just tried the following iRule:

 

 

when HTTP_REQUEST {

 

log local0. "Hello"

 

}

 

 

 

 

Nothing is getting written to /var/log/ltm no matter what URL I call. Is there something you have to do to turn an iRule on after you add it to the list? If not, does anyone know why HTTP_REQUEST might not be working?

 

 

 

Thanks!

 

Hi Scott,

How are you making the HTTP request? Can you try this iRule:

when HTTP_REQUEST {
    log local0. "[IP::client_addr]:[TCP::client_port]: Connected to [virtual name] [IP::local_addr]:[TCP::local_port]" 
   HTTP::respond 200 content "Connected to [virtual name] [IP::local_addr]:[TCP::local_port] from [IP::client_addr]:[TCP::client_port]"
}

Then start with a curl request on the LTM command line:

curl -v http://1.1.1.1

where 1.1.1.1 is the virtual server address. If that works, then try from a browser. If the curl command works but you don't see a response from the iRule in a browser, then it's likely the request isn't making it to LTM.

Aaron

The curl command doesn't seem to be working for me, here's what it returned:

 

 

* About to connect() to [ip] port 80

 

* Trying [ip]... Connection refused

 

* couldn't connect to host

 

* Closing connection 0

 

curl: (7) couldn't connect to host

 

 

 

 

So I'm assuming this means that there's a problem with my F5 rather than my iRules. I'll have to look into this. Thanks for the help everyone!

 

Do you have ARP enabled on the virtual server address (Local Traffic ›› Virtual Address List)? Is the virtual server enabled?

 

 

Aaron