Do you have iscsi_ip_address set on the volume host? It needs to be an ip that the compute hosts can hit. When the volume is created this ip is stored for connection information in the database, so if you don't have it set, you will probably need to set it, restart nova-volume and recreate volumes before attaching.
Do you have iscsi_ip_address set on the volume host? It needs to be an ip that the compute hosts can hit. When the volume is created this ip is stored for connection information in the database, so if you don't have it set, you will probably need to set it, restart nova-volume and recreate volumes before attaching.