VM/CT IDs:
  - first digit:
    - environment number
    - 1 - development
    - 5 - production
    - 6 - common
  - second-third digit:
    - node types
    - 0 - load balancers, databases, gateways
    - 1-9 - other services
  - fourth digits:
    - service number
    - reserve an interval for services

enable nesting to prevent freezes on user change