The Compute and Volume APIs have resource usage limits.
Compute v2, Volume v1
Show compute and volume limits
os limits show
--absolute [--reserved] | --rate
[--project <project>]
[--domain <domain>]
Show absolute limits
Show rate limits
Include reservations count [only valid with --absolute]
Show limits for a specific project (name or ID) [only valid with –absolute]
Domain that owns –project (name or ID) [only valid with –absolute]