Dynamic resource allocation is similar to storage in the sense that users
create ResourceClaim objects to request resources, same as with persistent
volume claims. The actual resource usage is only known when allocating claims,
but some limits can already be enforced at admission time:
- "count/resourceclaims.resource.k8s.io" limits the number of ResourceClaim objects in
a namespace; this is a generic feature that is already supported also without
this commit.
- "resourceclaims" is *not* an alias - use "count/resourceclaims.resource.k8s.io"
instead.
- <device-class-name>.deviceclass.resource.k8s.io/devices limits the number of
ResourceClaim objects in a namespace such that the number of devices
requested through those objects with that class does not exceed the limit.
A single request may cause the allocation of multiple devices. For exact
counts, the quota limit is based on the sum of those exact counts. For requests
asking for "all" matching devices, the maximum number of allocated devices per
claim is used as a worst-case upper bound.
Requests asking for "admin access" contribute to the quota.
DRA quota: remove admin mode exception
PVC and containers shared the same ResourceRequirements struct to define their
API. When resource claims were added, that struct got extended, which
accidentally also changed the PVC API. To avoid such a mistake from happening
again, PVC now uses its own VolumeResourceRequirements struct.
The `Claims` field gets removed because risk of breaking someone is low:
theoretically, YAML files which have a claims field for volumes now
get rejected when validating against the OpenAPI. Such files
have never made sense and should be fixed.
Code that uses the struct definitions needs to be updated.
1. Define ContainerResizePolicy and add it to Container struct.
2. Add ResourcesAllocated and Resources fields to ContainerStatus struct.
3. Define ResourcesResizeStatus and add it to PodStatus struct.
4. Add InPlacePodVerticalScaling feature gate and drop disabled fields.
5. ResizePolicy validation & defaulting and Resources mutability for CPU/Memory.
6. Various fixes from code review feedback (originally committed on Apr 12, 2022)
KEP: /enhancements/keps/sig-node/1287-in-place-update-pod-resources
- Run hack/update-codegen.sh
- Run hack/update-generated-device-plugin.sh
- Run hack/update-generated-protobuf.sh
- Run hack/update-generated-runtime.sh
- Run hack/update-generated-swagger-docs.sh
- Run hack/update-openapi-spec.sh
- Run hack/update-gofmt.sh
Signed-off-by: Davanum Srinivas <davanum@gmail.com>
Fix a TODO to plumb an update filter from above in the resource quota
monitor code that was handling update events for quota-able objects,
instead of hard-coding the logic in the resource quota monitor.
Signed-off-by: Andy Goldstein <andy.goldstein@redhat.com>
The goal of this move is related to issue 89930, to break the dependence
of scheduling plugins on internal helpers. This function can easily move to
component-helpers where it will be used by other components as well.
Signed-off-by: pacoxu <paco.xu@daocloud.io>
When Spec.AllocateLoadBalancerNodePorts is "false" NodePort shall
not be included when computing quota for type:LoadBalancer.
Co-authored-by: uablrek
