Can't read cookie on F5 terminated SSL?

Good to hear the node command is working. To figure out why you're getting the TCL error on the pool check, you could try logging the LB::server pool output. It's probably related to the use of the node command. If you want to check the default pool state, you could save the pool name in CLIENT_ACCEPTED before the current pool has been changed:

 
 when CLIENT_ACCEPTED { 
  
    set default_pool [LB::server pool] 
 } 
 

You can then reference $default_pool in the rest of the rule instead of using [LB::server pool]

Aaron