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NiHo_202842's avatar
NiHo_202842
Icon for Cirrostratus rankCirrostratus
Jan 13, 2016
Solved

Incorrect load balancing when disabling Oneconnect

Hello,   so sketch the situation; we have a $app-pool and an $app-report-pool. $app-pool serves the regular web interface, while $app-report generates reports and sends this to the user. Default p...
cookie persistence
devops
iRules
LTM
oneconnect
  • Hannes_Rapp_162's avatar
    Hannes_Rapp_162
    Jan 13, 2016

    Is the app-pool configured as Default Pool in your Virtual Server settings? If you conditionally select another pool, ie. the server-report1 pool in an iRule, you will need to include a 'Default or Else' clause in the iRule to 'Re-Confirm' your Default Pool. Just having the app-pool as your Default Pool setting in Virtual Server properties will not be enough.

    You may see a similar problem occuring in your environment:

    - Your first request to app-pool is routed correctly
- Your second request to app-pool is routed correctly
- .. All requests destined to app-pool are routed correctly, until the first occurence where a request is routed to server-report1 pool
- .. All the requests that should go to app-pool (default) thereafter are now incorrectly routed to server-report1 pool.

    For a solution, if you're using the 

    if
    conditional statement, append an 
    else
    statement to specify the app-pool as your default selection in iRule. If you're using 
    switch
    conditional statement, append a 
    default
    statement.

    Give it a try, if the conditions described match your configuration. This would be a generic iRule problem, not related to OneConnect by any means.

Hannes_Rapp's avatar
Hannes_Rapp
Icon for Nimbostratus rankNimbostratus
Jan 13, 2016

Is the app-pool configured as Default Pool in your Virtual Server settings? If you conditionally select another pool, ie. the server-report1 pool in an iRule, you will need to include a 'Default or Else' clause in the iRule to 'Re-Confirm' your Default Pool. Just having the app-pool as your Default Pool setting in Virtual Server properties will not be enough.

You may see a similar problem occuring in your environment:

- Your first request to app-pool is routed correctly
- Your second request to app-pool is routed correctly
- .. All requests destined to app-pool are routed correctly, until the first occurence where a request is routed to server-report1 pool
- .. All the requests that should go to app-pool (default) thereafter are now incorrectly routed to server-report1 pool.

For a solution, if you're using the 

if
conditional statement, append an 
else
statement to specify the app-pool as your default selection in iRule. If you're using 
switch
conditional statement, append a 
default
statement.

Give it a try, if the conditions described match your configuration. This would be a generic iRule problem, not related to OneConnect by any means.

  • NiHo_202842's avatar
    NiHo_202842
    Icon for Cirrostratus rankCirrostratus
    Jan 14, 2016
    It is! I accidently discovered this behaviour while trying things out. You would think it reverts back to the 'default pool'. Thank you!