Forum Discussion

djamil_chlih_23's avatar
djamil_chlih_23
Icon for Nimbostratus rankNimbostratus
Aug 21, 2017

Irule maintenace page switches to another page after a time defined

Dear all,

I have done an Irule that switches a maintenace page to another page after a 5 min, this Irule is Work well for one Virtual Server, when i deploy it to more then one Virtual Server, the second Maintenance page don't display, because i use the global variable.

have you an idea to how can i change this iRule for working on all Virtual Server?

please find below the Irule:

when RULE_INIT {
set ::timestart [clock seconds]
}

when CLIENT_ACCEPTED {
if { [active_members [LB::server pool]] < 1 } {set lb 0}
elseif { [active_members [LB::server pool]] > 0 }{
set lb 1
set ::timestart [clock seconds]

}
}
when HTTP_REQUEST {
if {$lb ==0}{
set timenow [clock seconds]
set timeduration [expr {int($timenow) - int($::timestart)}]
switch -glob [HTTP::path] {
"*/image1.png" {
HTTP::respond 200 content [ifile get imagefile1] "Content-Type" "image/png"
}

"*/image2.png" {
HTTP::respond 200 content [ifile get imagefile2] "Content-Type" "image/png"
}

}
default {
if {$timeduration < 300}{
HTTP::respond 200 content [ifile get Sorry_Page] "Content-Type" "text/html" noserver
}
else {
HTTP::respond 200 content [ifile get Sorry_Page_5] "Content-Type" "text/html" noserver
}
}
}
TCP::close

}
}

Thank you for you help.

application delivery
BIG-IP
iRules
  • djamil_chlih_23's avatar
    djamil_chlih_23
    Icon for Nimbostratus rankNimbostratus
    Aug 22, 2017

    Thank you for your help,

     

    My global value indicate the first time when the all servers pool are down, then i need that value change every one that the state arrive.

     

    if i use the global value in other Irule, i can't change it.

     

    Have you an idea how can i have the first time when the all servers of my pool are down? i need to use this value for every VIP related to this pool of servers, (until that the state of the pool change).

     

  • Lee_Sutcliffe's avatar
    Lee_Sutcliffe
    Icon for Nacreous rankNacreous
    Aug 22, 2017

    You shouldn't be using global variables as this will demote your CMP to one CPU. Also, as you are setting the variable in RULE_INIT and CLIENT_ACCEPTED, the set command in CLIENT_ACCEPTED will overwrite the variable in RULE_INIT. This means the set in RULE_INIT is redundant. That being the case, you could just remove the RULE_INIT event and edit CLIENT_ACCEPTED so that it sets 'timestart' as a local variable

    set timestart [clock seconds]

  • Stanislas_Piro2's avatar
    Stanislas_Piro2
    Icon for Cumulonimbus rankCumulonimbus
    Aug 22, 2017

    Hi,

    use table with virtual server name as key instead of global variables

    when RULE_INIT {
    set static::table_timeout 43200
}

when CLIENT_ACCEPTED {
    if { [active_members [LB::server pool]] < 1 } {
        set lb 0
    } elseif { [active_members [LB::server pool]] > 0 } {
        set lb 1
        if {[table lookup -subtable maintenance [virtual name]] ne 1} {
            table set -subtable maintenance [virtual name] 1 $static::table_timeout 0
        }
    }
}

when HTTP_REQUEST {
    if {$lb ==0}{
        switch -glob [HTTP::path] {
            "*/image1.png" {
                HTTP::respond 200 content [ifile get imagefile1] "Content-Type" "image/png"
            }

            "*/image2.png" {
                HTTP::respond 200 content [ifile get imagefile2] "Content-Type" "image/png"
            }
            default {
                if {[expr {[table lifetime -subtable maintenance -remaining [virtual name]] - $static::table_timeout}] < 300}{
                    HTTP::respond 200 content [ifile get Sorry_Page] "Content-Type" "text/html" noserver
                }
                else {
                    HTTP::respond 200 content [ifile get Sorry_Page_5] "Content-Type" "text/html" noserver
                }
            }
        }
    }
    TCP::close

}