I have one VS with two nodes/members with F5 BIG-IP. Is there a way to send all the traffic comes to VS send only to member one and if something happened to node one (eg: health fail) send traffic to node two.
Also is there a way to add custom heath check. Like check node URL value to healthy or not?
In answer to your first query you can use Priority Group Activation. Have the two pool members in two pools and the priority of the pool with member one will be higher than the pool with member two in it. That way whilst member one is up all traffic will go to this member. When it fails then member two will receive traffic.
Not sure i follow your second question but a HTTP monitor allows you to GET for a particular URL in the Send String and you can configure the Receive string for the expected response.