Add a resource specification to UAS. Once added, a resource specification can be used to request or limit specific resource consumption on a host node or gain access to host node features managed by Kubernetes resources. The examples in this documentation focus on memory and CPU usage, but Kubernetes does use resources in some configurations to manage access to other kinds of resources.
cray command) installed on the above hostcray init command) to reach the HPE Cray EX System API Gatewaycray auth login command)Add a resource specification.
Use a command of the following form:
cray uas admin config resources create [--limit <k8s-resource-limit>] [--request <k8s-resource-request>] [--comment '<string>']
For example:
cray uas admin config resources create --request '{"cpu": "300m", "memory": "1Gi"}' \
--limit '{"cpu": "300m", "memory": "1Gi"}' \
--comment "Resource Specification to use with Brokered End-User UAIs"
See Elements of a UAI for an explanation of UAI resource specifications.
The example above specifies a request / limit pair that requests and is constrained to 300 milli-CPUs (0.3 CPUs) and 1 GiB of memory (1 * 1024 * 1024 * 1024 bytes) for any UAI created with this limit specification.
By keeping the request and the limit the same, this ensures that a host node will not be oversubscribed by UAIs. It is also legitimate to request less than the limit, though that risks over-subscription and is not recommended in most cases.
If the request is greater than the limit, UAIs created with the request specification will never be scheduled because their pods will not be able to provide the requested resources.
All of the configurable parts are optional when adding a resource specification. If none are provided, an empty resource specification with only a resource_id will be created.