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fa141_28766's avatar
fa141_28766
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Aug 23, 2011

Node failover

If I have a pool with 4 nodes

 

 

Node A

 

Node B

 

Node C

 

Node D

 

 

If node A fails, I want it's clients to failover to Node a.

 

 

Node A if fails send clients to Node a

 

Node B if fails send clients to Node b

 

Node C if fails send clients to Node c

 

Node D if fails send clients to Node d

 

 

So each node has it's own static backup node.

 

 

Anyone know how to accomplish this?

 

 

Thanks,

 

 

Peter M.
application delivery
dev
devops
iRules
  • Colin_Walker_12's avatar
    Colin_Walker_12
    Historic F5 Account
    Aug 23, 2011
    I'm not sure I follow what Node a is vs. Node A. You mean you want to fail to a backup Node that isn't B, C, or D?

     

     

    That's certainly possible. You would just need to check the node state prior to sending a request there. This can be done with the LB:: commands pretty easily. A rudimentary example would look like:

     

     

    if {!([LB::status node 10.10.10.10] eq "up") } {

     

    node 10.10.10.11 80

     

    }

     

     

    Colin
  • fa141_28766's avatar
    fa141_28766
    Icon for Nimbostratus rankNimbostratus
    Aug 24, 2011
    Yes Node A is one IP with Node a another. I want to force it to go to Node a versus another Node in the pool
  • Muhammad_64435's avatar
    Muhammad_64435
    Icon for Nimbostratus rankNimbostratus
    Aug 27, 2011
    How about you create 4 pools

     

     

    NodeA pool contains both nodes "A" and "a"

     

    NodeB pool contains both nodes "B" and "b" so on and so forth.

     

     

    Then set the high priority on node A in Pool NodeA ... so if Node A fails then it will go to node a ...

     

     

    Just my 2 cents.