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Javier_Checa_41's avatar
Javier_Checa_41
Icon for Nimbostratus rankNimbostratus
Oct 02, 2008

Setting member preference without updating configuration

Hi all,

 

 

I've got a LC HA pair in Active / Active mode. Sometimes I need to change priority of some pool members. I've tried changing ratio / dynamic ratio and priority through bigpipe shell, but all of them modifies the configuration, so HA pair appears to be out sync.

 

 

Performing these changes with iControl, does it "update" the configuration?

 

 

Kind regards,

 

Javier.
management
monitoring

7 Replies

  • hoolio's avatar
    hoolio
    Icon for Cirrostratus rankCirrostratus
    Oct 03, 2008
    Hi Javier,

     

     

    I don't think there is a way to modify the running configuration without the sync status being changed through the GUI, the CLI or iControl. Is there a reason you can't either sync the config to the peer or handle it being out of sync?

     

     

    Aaron
  • Javier_Checa_41's avatar
    Javier_Checa_41
    Icon for Nimbostratus rankNimbostratus
    Oct 06, 2008
    Hi Hoolio,

     

     

    I was looking for a way to implement a monitor that could change on the fly the priority / ratio for a node / member. Something similar to dynamic monitors.

     

     

    It should be nice I could create my own SNMP monitors and being able to monitor OIDs I'd like to.

     

     

    Kind regards,

     

    Javier Checa.
  • hoolio's avatar
    hoolio
    Icon for Cirrostratus rankCirrostratus
    Oct 06, 2008
    Hi Javier,

     

     

    Is there something you want to do that you cannot do with the default dynamic ratio algorithm? Or is the issue that the dynamic ratio algorithm generates a state where the units show the configuration is out of sync?

     

     

    Aaron
  • Javier_Checa_41's avatar
    Javier_Checa_41
    Icon for Nimbostratus rankNimbostratus
    Oct 06, 2008
    Hi Hoolio,

     

     

    I'm not concerned about default dynamic ratio algorithm. I'd like to assess the possibility to implement something similar to SNMP monitors (changing dynamic ratios) but with an external script or through iControl.

     

     

    Thx for your help Aaron.
  • hoolio's avatar
    hoolio
    Icon for Cirrostratus rankCirrostratus
    Oct 06, 2008
    You might get more relevant views in the iControl forum (Click here). But yes, you can poll the pool members directly using SNMP or any other protocol and then modify the LTM pool configuration to specify a new weight for the pool members.

     

     

    Aaron
  • Javier_Checa_41's avatar
    Javier_Checa_41
    Icon for Nimbostratus rankNimbostratus
    Oct 06, 2008
    Hi Aaron,

     

     

    the point of the post was.. to modify any dynamic value through cli or iControl but not modifying the configuration.

     

     

    best regards,

     

    Javier Checa.
  • hoolio's avatar
    hoolio
    Icon for Cirrostratus rankCirrostratus
    Oct 06, 2008
    Sorry for the misunderstanding, Javier. If you want to modify how LTM processes traffic to the pool, you'd need either use a dynamic load balancing algorithm or modify the configuration. Dynamic load balancing can be done using a plugin or SNMP monitoring of the pool members. Else if neither of these options work for your scenario, you could modify the configuration manually using the GUI or programmatically via iControl.

     

     

    If I'm still missing your question, can you elaborate on what you're trying to accomplish, what you've tried and what's not working?

     

     

    Thanks,

     

    Aaron