local variable within same irule on all events

Irule variables are tcp connection specific in scope , so you can set it once in CLIENT_ACCEPTED and will work for all events on that top connection.

How about using a static variable defined when the iRule initiates?

when RULE_INIT {  
     set static::logdebug 1     
}

Thank's, therefore the right way to log in may case should be:

when CLIENT_ACCEPTED { set debug 1 if {$debug != 0} {log local0.info "Client Connected, IP: [IP::client_addr], pool [LB::server pool]"} }

when HTTP_REQUEST { if {$debug != 0} {log local0.info "Client IP IP: [IP::client_addr], host [HTTP::host]"} }

when LB_SELECTED { if {$debug != 0} {log local0.info "in LB_SELECTED, IP [IP::client_addr]:[TCP::client_port], node [LB::server addr], pool [LB::server pool]"} }

when LB_FAILED { if {$debug != 0} {log local0.info "in LB_FAILED, IP [IP::client_addr]:[TCP::client_port], node [LB::server addr], pool [LB::server pool]"} }

Can you try this?

when RULE_INIT {
    set static::debug 1
}

when CLIENT_ACCEPTED { 
    set logdebug $static::debug
    if {$logdebug} {
        log local0.info "Client Connected, IP: [IP::client_addr], pool [LB::server pool]"
    } 
}

when HTTP_REQUEST { 
    if {$logdebug} {
        log local0.info "Client IP IP: [IP::client_addr], host [HTTP::host]"
    } 
}

when LB_SELECTED { 
    if {$logdebug} {
        log local0.info "in LB_SELECTED, IP [IP::client_addr]:[TCP::client_port], node [LB::server addr], pool [LB::server pool]"
    } 
}

From my knowledge static variable are global therefore if you use it on other irule you will have issues ..

Personally I generally don't tend to use static variables - they are too subject to unexpected change from other irules 'accidentally' initialising the same variable. Think variable 'static::debug' - what crimes have been committed against that?

I tend to use CLIENT_ACCEPTED to initialise my variables - the overhead is negligible.

RULE_INT sets global variable that's ouf of my scope.

But I'd like to avoid global variable and have to set logdebug to 1 only once on the irule

sorry, I missed the requirement.

Yes sorry I missed that too. Just do as iheartf5 mentions above. Set the local variable in the CLIENT_ACCEPTED event and it will then exist for all the other events for that particular connection.

No problem. It was out of the requirements because I think that if you set the variable, for log purpose, as a global one you have effect on all other irule where this variable is used and for me doesn't make sense. Isn't ?