-second_part_start: "{{ first_part_size }}"
-second_part_end: "{{first_part_size | int + second_part_size | int }}"
-third_part_start: "{{ second_part_end }}"
+lvm_part_number: "{{ sys_part_number|int + 1 }}"
+lvm_part_start: "{{ sys_part.end }}"
+lvm_part_end: "{{ lvm_part_start|float + lvm_part_size|float }}"
+
+instance_part_number: "{{ sys_part_number|int + 2 }}"
+instance_part_start: "{{ lvm_part_end }}"