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Forum Discussion

Brady_11518's avatar
Brady_11518
Icon for Nimbostratus rankNimbostratus
Apr 26, 2013

Check if node is offline (down) or unavailable (busy)

I'd like to be able to return two different splash pages if there is a problem, one if the nodes are all offline due to monitor failure (site down for maintenance), but a different one if no nodes ar...
application delivery
dev
devops
iRules
Michael_Yates's avatar
Michael_Yates
Icon for Nimbostratus rankNimbostratus
Apr 26, 2013
Hi Brady,

 

 

The Monitors control the availability of a server in a pool and any manual up/down changes that are made to the server by an Administrator are simply treated like as an up/down status that you would get with a monitor (with the exception of currently connected connections if the Node is Disabled or Forced Off-Line).

 

 

You can use the active_members command in an iRule to get the number available servers and made decisions on what to do with the traffic based on that.

 

 

If you have 4 servers in a pool and none are available do X, but if all four are available do Y, etc.

 

 

Connection Limits are treated as a "Node Down" / Unavailable if you hit it (starting in v11 (not sure if it's just v11 or v11.1 or 2) you can start Queuing connections in a pool).

 

 

Hope this helps.