Forum Discussion
Miguel_61449
Nimbostratus
NimbostratusInternal big ip ltm flow consultation
Hello all,
I would like to inquire about the operation of iRules and the http_class in a big-ip ltm system. I have a pretty good idea of how these resources work and can be allocated to...
hoolio
Cirrostratus
CirrostratusHi Miguel,
An iRule can have multiple events which execute before and after the HTTP class(es) are evaluated. Here's a quick list:
CLIENT_ACCEPTED - TCP connection from client to VIP established
HTTP_REQUEST - client's HTTP request headers parsed
HTTP_CLASS_SELECTED (if a matching class is found for a request) or HTTP_CLASS_FAILED (if no matching class is found for a request). If a pool is added to the HTTP class and it matches the request, the pool selection will override the VS default pool and any pool selected in the HTTP_REQUEST event.
LB_SELECTED - pool member selected
SERVER_CONNECTED - TCP connection from LTM to server established
HTTP_REQUEST_SEND - just before the HTTP request is sent to the server
HTTP_REQUEST_RELEASE - last chance to inspect/modify HTTP headers only before request is sent to pool/node (added in v11.0)
HTTP_RESPONSE - server's HTTP response headers parsed
HTTP_REQUEST_RELEASE - last chance to inspect/modify HTTP headers only before request is sent to client (added in v11.0)
SERVER_CLOSED - LTM to server connection closed
CLIENT_CLOSED - client to VIP connection closed
Aaron
