Forum Discussion

matt1985_299432's avatar
matt1985_299432
Icon for Nimbostratus rankNimbostratus
Apr 11, 2017
Solved

IRULE redirection to maintenance pool based on client IP and cookie...

Hi,

 

I have a requirement to redirect test clients to a maintenance pool based on client IP address and the client manually inserting a cookie. The process will be..

 

Server maintenance flag set which takes server out of the live pool and enables it in the maintenance pool. The a test client will set a cookie in browser and get redirected to the active server in the maintenance pool.

 

I have all this working with the IRULE below (there are actually more sites). However I am wondering if there is a more efficient way to do this (i am fairly new to IRULES)..

 

Thanks Matt

 

application delivery
iRules
  • Kevin_Davies_40's avatar
    Kevin_Davies_40
    Apr 12, 2017

    I think this will do what you need...

    when HTTP_REQUEST {
    if {[class match [HTTP::header "True-Client-IP"] equals MAINTENANCE-CLIENTS]} {
         if {[HTTP::cookie exists "MAINTENANCE"]} {
             switch -glob [string tolower [HTTP::uri]] {
                 "/site1*" -
                 "/site2*" -
                 "/site3*" { pool MAINT-A; persist cookie }
             }
              go no further
             return
         }
    }
    switch -glob [string tolower [HTTP::uri]] {
        "/site1*" { pool POOL-A; persist cookie }
        "/site2*" { pool POOL-B ; persist cookie }
        "/site3*" { pool POOL-C; persist cookie }
    }
}

11 Replies

Sort By
  • Kevin_Davies_40's avatar
    Kevin_Davies_40
    Icon for Nacreous rankNacreous
    Apr 11, 2017

    Just paste it to notepad, then paste it here. Then highlight the entire iRule then hit TAB to indent it. This will make Devcentral treat it like code and not markup. Do this in the original post by editing it. Click the tiny little pad and pencil next to your profile picture at the top of your post to edit.

     

  • Kevin_Davies_40's avatar
    Kevin_Davies_40
    Icon for Nacreous rankNacreous
    Apr 12, 2017

    I think this will do what you need...

    when HTTP_REQUEST {
    if {[class match [HTTP::header "True-Client-IP"] equals MAINTENANCE-CLIENTS]} {
         if {[HTTP::cookie exists "MAINTENANCE"]} {
             switch -glob [string tolower [HTTP::uri]] {
                 "/site1*" -
                 "/site2*" -
                 "/site3*" { pool MAINT-A; persist cookie }
             }
              go no further
             return
         }
    }
    switch -glob [string tolower [HTTP::uri]] {
        "/site1*" { pool POOL-A; persist cookie }
        "/site2*" { pool POOL-B ; persist cookie }
        "/site3*" { pool POOL-C; persist cookie }
    }
}
    • Kevin_Davies_40's avatar
      Kevin_Davies_40
      Icon for Nacreous rankNacreous
      Apr 12, 2017

      Only if the True-Client-IP equals the data class AND the cookie exists will it select the maintenance pool. Otherwise it will process the next section routing traffic as normal. If the header does not exist it will simply return "" which should not match anything in the data class.

       

    • matt1985_299432's avatar
      matt1985_299432
      Icon for Nimbostratus rankNimbostratus
      Apr 12, 2017

      Hi Kevin,

       

      That works much better certainly if I set client IP AND cookie as specified it still gets me to the maintenance pools. However not falling through to the normal pools when there is no specific cookie client IP required.. just trying to work that through

       

      Thanks

       

      Matt