URL to Node persistency

As you are switching on the URI, your switch statements should only contain "/application1*" and end with a wildcard *. Yes, you should use 'default' to catch anything not matched. Here's my take;

when HTTP_REQUEST {
 switch -glob [string tolower [HTTP::uri]] {
  "/application1*" { pool poolname member ip port }
  "*application2*" { pool poolname member ip port }
  default { pool some-pool-name }
 }
}

Also see here for how you might check that each pool member is up: https://devcentral.f5.com/wiki/iRules.pool.ashx

Hello Steve,

 

 

thank you for your answer.

 

 

What have i to use when "customer", "vendor" and "application" are variable?

 

 

Kind regards,

 

Kim

How many possible URIs are there?

maximum ten to twelth possibilities.

 

 

I thought i manually actualize the iRule when something is changing (should not be so often)...

 

why i can't use switch with the whole URL? Should i use regex instead?

 

 

Thank you and kind regards,

 

Kim

You can switch with the whole URL, use something like this instead;

 

when HTTP_REQUEST {

 

set clienturl [string tolower [HTTP::host]][string tolower [HTTP::uri]]

 

switch -glob $clienturl {

 

"*/application1*" { pool poolname member ip port }

 

"*application2*" { pool poolname member ip port }

 

default { pool some-pool-name }

 

}

 

}

 

 

I can rewrite the rule for that number no problem and I might have suggested a Data Group if there were a great number of URLs but 12 should be manageable, I might do it anyway as it reduces the risk of errors when updating the URLs.

 

 

A regex would be far more CPU intensive.

 

 

Before I do the final rewrite, can I just check, are all 12 URLs going to the same member?

 

I do not understand why you use now

 [string tolower [HTTP::host]]

My TCL Programming Skills are very low, i'm sorry.

I do have 4 Members (2 Members in 2 Pools). What is the Problem when I'm using the whole URL insted of only "*/application1"?

Kind regards,

Kim

string tolower just makes everything lower case which makes the matching easier as you don't have to worry about case sensitivity.

 

 

You can do it with the whole URL if you want, it's just simpler not to if you can use wildcards and be sure everything you need to gets matched.

I did not mean the command tolower, but [HTTP::host] for what I do need this one in this case?

If you wanted to include the full URL in the switch statements you would need [HTTP::host] as well as [HTTP:uri]. Host is the www.xxx.com bit, URI is the the first / onwards.

ah, ok. Thank you.

 

 

Now I think i could write this iRule... if I need further support I will go to write here again.