variable scopes only for one virtual sever or one request

otahi

Hello.

I want to operate multiple stage environments(development, staging, production) in a partition.
For those environments, I want to use same aflex policies as many as possible.

I had looked for use following aflex policies.

staging_env.tcl

when RULE_INIT {
    set ::global::target_service = "staging_service_80"
}

production_env.tcl

when RULE_INIT {
    set ::global::target_service = "production_service_80"
}

http_location.tcl

when HTTP_REQUEST {
    pool ::global::target_service
}

But ::global:: variables seem really global on the whole AX device.
So I think the variable for the staging effects to the production.

I want to use variables can be applied to one virtual service or one request.

Do we have any solutions?

mischa

Can you give it a go without the ::global prefix.
Just do ::target_service and it will be "local" to the Virtual Port.

otahi

Mischa,
Thank you for your response.

I have just tried but result is NG.
:: variable can not be read by other policies.
I want to use separated policies to keep maintainability.

config for a virtual service

   port 80  http
      name test
      service-group pl_test
      aflex test-env
      aflex test-access

aflex test-env

when RULE_INIT {
    set ::global::test_target_service "global"
    set ::test_target_service "noglobal"
}

aflex test-access

when HTTP_REQUEST {
    log "::global::test_target_service $::global::test_target_service"
    log "::test_target_service  $::test_target_service"
}

log(result) : logged only for the global variable

Mar 11 2014 01:05:22 Info    [AFLEX]:::global::test_target_service global

I rechecked the manual 'aFleX Scripting Language Reference'
and some descriptions there.

Prefix ::
Scope
Applies only to the current aFleX policy.
This variable cannot be set or read by any other
aFleX policies. Once the variable is defined, it can
be removed only by an unset command.

Prefix ::global::
Scope
Applies to all aFleX policies. This variable can be
set or read by all aFleX policies on the AX device.

any ideas?

mischa

Yes, you are correct the ::VAR can not be used by other scripts. I have been wrecking my brain but there isn't a way to do what you want to do today.
Using tables for example will give you the same result as ::global::.
The only alternative would be to include the RULE_INIT in the actual script.

otahi

Hi,

I found a trick as follows.

When the virtual server works on 10.0.0.1.

aflex test-env

when RULE_INIT {
    set ::global::10.0.0.1 "pool_staging"
}

aflex test-access

when HTTP_REQUEST {
    eval "set pool_name \${::global::[IP::local_addr]}"
    log "pool_name $pool_name"
}

log

Mar 18 2014 05:01:10 Info    [AFLEX]:pool_name pool_staging

We might use arrays in this way.
Please tell me if you have any smarter ways.

mischa

Nice workaround!