Forum Discussion

Nimbostratus

Dec 28, 2016

How to adjust VIP setting from an iApp

Hi,

I have to adjust virtual-address settings from an iApp.

The iApp create a single VS, with an unused destination-IP. So the associated VIP is automatically created. But I have to advertise this IP inside OSPF, so I would-like to do this in the iApp.

If I use this line :

iapp::conf create ltm virtual-address /Common/${::vs__vip} route-advertisement enabled

the VIP is created with required parameters, but the virtual-ip is depending on the application :

1.1.1.6

without

iapp::conf create ltm virtual-address

1.1.1.10

with

iapp::conf create ltm virtual-address

And the VIP cannot be modified, either inside or outside the iApp (changing traffic-group of the iApp or of the VIP for example) because of the application dependence.

Do you know how to set default VIP settings ? Like advertisement, arp, etc.

Thank you for your responses,

application delivery

iApps

Fred_Slater_856
Dec 28, 2016
Adding "app-service none" to the virtual-address command will detach it from the iapp, allowing you to modify it at-will later on. (Note that since it is no longer managed by the iapp, the virtual-address will not be deleted when the iapp is deleted.)

iapp::conf create ltm virtual-address /Common/$::vs__vip route-advertisement enabled app-service none

Fred_Slater_856
Historic F5 Account
Dec 28, 2016
Adding "app-service none" to the virtual-address command will detach it from the iapp, allowing you to modify it at-will later on. (Note that since it is no longer managed by the iapp, the virtual-address will not be deleted when the iapp is deleted.)

iapp::conf create ltm virtual-address /Common/$::vs__vip route-advertisement enabled app-service none
- S__233_bastien2
  Nimbostratus
  Dec 28, 2016
  Hi Fred,
  
  With
  app-service none
  this application dependency disappear in VIP list, but it's still impossible to modify the iApp traffic-group :
  
  Do you have any idea?
- Fred_Slater_856
  Historic F5 Account
  Dec 28, 2016
  There must be more to it. I cannot reproduce your problem by simply changing the traffic-group.
- S__233_bastien2
  Nimbostratus
  Dec 28, 2016
  Hi,
  
  I've recreate a simplified iApp to test that.
  
  You should manage to import this template.
  
  Create an instance with 10.10.10.10 as vip and traffic-group-X as iApp traffic-group (should be ok)
  Modify the vip with 10.10.10.11 (should be ok)
  Modify the iApp traffic-group with traffic-group-Y ("should" not be ok)
  
  01070734:3: Configuration error: The virtual address (/Common/10.9.8.7) can not be modified because it is in use by application (/Common/t.app/t) that does not have a matching traffic group
  
  Do you have the same error?
s_g___INST__253
Nimbostratus
Aug 19, 2017
Hi,

I just stumbled across this question when I hit exactly the same problem: I want to use an iApp for the mass deployment of VIPs that will be cloned to a second traffic group.

Running 12.1.2 it seems impossible to detach a virtual-server from the iApp (even though app-service none will hide the link to the application in the virtual address list, it seems the iApp itself does not forget about it...). Of course I could change the iApp to cover only one traffic group and replicate the config manually / scripted to the seconds traffic group but I really would like to get it solved using only a single iApp.

Do you see a potential other solution?

Thanks, Sebastian
- Fred_Slater_856
  Historic F5 Account
  Aug 21, 2017
  Did the workaround I described above not work? What do you mean by "impossible to detach a virtual-server?" What error are you getting?