Is it possible to run a SQL query and depending on the result put a pool member up or down? The problem here is that the SQL query is not running against the pool member.

Yes. Both the MSSQL and MySQL monitors have fields where you can put an alias address (the address of the SQL server you want to check) and depending on whether the check is successful or not your pool member(s) will be marked UP/DOWN.

Thank you - I see those fields, but I don't have the ability to modify the field at least not from the monitor page. It just says : All Addresses All Ports

The only other way I can think of is to do an iRule. I have a pool which is not actually connected to the VS. Assign monitor to that pool. Then I could do an iRule which says, if MySqlServerPool has available members, then use this node, else use this other node. It is a bit of a hack... and seems unnecessary, but it would probably work. Please let me know if there is a cleaner way to do it.

SQL Monitor question / problem...

18 Replies

Ryannnnnnnnn
Altocumulus
Aug 10, 2018
Yes. Both the MSSQL and MySQL monitors have fields where you can put an alias address (the address of the SQL server you want to check) and depending on whether the check is successful or not your pool member(s) will be marked UP/DOWN.
- patonbike
  Cirrus
  Aug 10, 2018
  Thank you - I see those fields, but I don't have the ability to modify the field at least not from the monitor page. It just says :
  
  All Addresses
  All Ports
- patonbike
  Cirrus
  Aug 10, 2018
  The only other way I can think of is to do an iRule.
  
  I have a pool which is not actually connected to the VS. Assign monitor to that pool.
  
  Then I could do an iRule which says, if MySqlServerPool has available members, then use this node, else use this other node.
  
  It is a bit of a hack... and seems unnecessary, but it would probably work. Please let me know if there is a cleaner way to do it.
- patonbike
  Cirrus
  Aug 10, 2018
  Any idea why I can't assign the alias address/port?
Ryan_80361
Cirrostratus
Aug 10, 2018
Yes. Both the MSSQL and MySQL monitors have fields where you can put an alias address (the address of the SQL server you want to check) and depending on whether the check is successful or not your pool member(s) will be marked UP/DOWN.
- patonbike
  Cirrus
  Aug 10, 2018
  Thank you - I see those fields, but I don't have the ability to modify the field at least not from the monitor page. It just says :
  
  All Addresses
  All Ports
- patonbike
  Cirrus
  Aug 10, 2018
  The only other way I can think of is to do an iRule.
  
  I have a pool which is not actually connected to the VS. Assign monitor to that pool.
  
  Then I could do an iRule which says, if MySqlServerPool has available members, then use this node, else use this other node.
  
  It is a bit of a hack... and seems unnecessary, but it would probably work. Please let me know if there is a cleaner way to do it.
- patonbike
  Cirrus
  Aug 10, 2018
  Any idea why I can't assign the alias address/port?