Merge pull request #4585 from pohly/dra-1.31-preparations

KEP-3063 and KEP-4381: DRA: "Structured Parameters" as base, "classic" DRA as extension

Author: k8s-ci-robot

keps/sig-node/3063-dynamic-resource-allocation/README.md

@@ -11,7 +11,7 @@ component Kubernetes {
   component apiserver {
       file Pod
       file ResourceClaim
-      file PodScheduling
+      file PodSchedulingContext
   }
   component scheduler {
     component "resource plugin" as k8sresourceplugin
@@ -29,19 +29,19 @@ controllermanager -[hidden]> kubelet
 drivercontroller -[hidden]> driverplugin
 
 Pod <. ResourceClaim: owned by\n(if created from template)
-Pod <. PodScheduling: owned by
+Pod <. PodSchedulingContext: owned by
 
 
 Pod -u-> k8sresourceclaimcontroller: read claim template\nfrom Pod spec
-ResourceClaim <-u- k8sresourceclaimcontroller: create claim,\nclean up users
+ResourceClaim <-u- k8sresourceclaimcontroller: create claim,\nclean up users,\ntrigger deallocation\n
 ResourceClaim <-u-> kubelet
-k8sresourceplugin <-u-> PodScheduling
+k8sresourceplugin <-u-> PodSchedulingContext
 
 Pod <--> scheduler
 ResourceClaim <--> k8sresourceplugin
 
 ResourceClaim <-> drivercontroller
 pluginmanager <-> driverplugin
 resourcemanager <-> driverplugin
-PodScheduling <-> drivercontroller
+PodSchedulingContext <-> drivercontroller
 @enduml

keps/sig-node/3063-dynamic-resource-allocation/components.png

@@ -24,7 +24,7 @@ stage: alpha
 # The most recent milestone for which work toward delivery of this KEP has been
 # done. This can be the current (upcoming) milestone, if it is being actively
 # worked on.
-latest-milestone: "v1.30"
+latest-milestone: "v1.31"
 
 # The milestone at which this feature was, or is targeted to be, at each stage.
 milestone:
@@ -37,6 +37,11 @@ feature-gates:
       - kube-controller-manager
       - kube-scheduler
       - kubelet
+  - name: DRAControlPlaneController
+    components:
+      - kube-apiserver
+      - kube-controller-manager
+      - kube-scheduler
 disable-supported: true
 
 metrics:

keps/sig-node/3063-dynamic-resource-allocation/components.puml

@@ -0,0 +1,35 @@
+# Copyright 2022 The Kubernetes Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+IMAGES += components.png kubelet.png
+
+all: $(IMAGES)
+clean:
+	rm -f $(IMAGES)
+
+# We use the http://plantuml.com/plantuml server to generate
+# images. That way nothing needs to be installed besides Go.
+DOC_PLANTUML_GO = $(shell go env GOPATH)/bin/plantuml-go
+
+%.png: %.puml $(DOC_PLANTUML_GO)
+	$(DOC_PLANTUML_GO) -format png $<
+
+%.svg: %.puml $(DOC_PLANTUML_GO)
+	$(DOC_PLANTUML_GO) -format svg $<
+
+# Builds the binary in GOPATH/bin. Changing into / first avoids
+# modifying the project's go.mod file.
+$(DOC_PLANTUML_GO):
+	cd / && go get github.com/acarlson99/plantuml-go

keps/sig-node/3063-dynamic-resource-allocation/kep.yaml

@@ -0,0 +1,60 @@
+@startuml
+!theme reddress-lightblue
+skinparam componentStyle rectangle
+left to right direction
+
+cloud "resource driver" as resourcedriver {
+  component "CRD controller" as drivercrdcontroller
+  component "kubelet plugin" as driverplugin
+}
+
+component Kubernetes {
+  component apiserver {
+    component namespaced {
+      file ResourceClaimTemplate
+      file Pod
+      file ResourceClaim
+      file DriverCRDParameters
+      file ResourceClaimParameters
+     }
+     component "cluster-scoped" as clusterscoped {
+      file ResourceClass
+      file ResourceSlice
+     }
+  }
+  component scheduler {
+    component "resource plugin" as k8sresourceplugin
+  }
+  component "controller-manager" as controllermanager {
+    component "resource claim controller" as k8sresourceclaimcontroller
+  }
+  component kubelet {
+    component "plugin manager" as pluginmanager
+    component "resource manager" as resourcemanager
+  }
+}
+
+' Kubernetes ---> resourcedriver
+
+ResourceClaimTemplate <. Pod
+Pod <. ResourceClaim: owned by\n(if created from template)
+ResourceClaim .> ResourceClass
+ResourceClaim .> DriverCRDParameters
+ResourceClaimParameters .> DriverCRDParameters: generated from,\nowned by
+
+Pod -u-> k8sresourceclaimcontroller
+ResourceClaimTemplate -u-> k8sresourceclaimcontroller
+ResourceClaim <-u- k8sresourceclaimcontroller: create claim,\nclean up consumers,\ntrigger deallocation
+k8sresourceplugin <- ResourceClaimParameters
+
+Pod <--> kubelet
+Pod <--> scheduler
+ResourceClaim <--> k8sresourceplugin
+
+ResourceClaimParameters <- drivercrdcontroller: create, update
+DriverCRDParameters ---> drivercrdcontroller: read
+resourcemanager <-> driverplugin: calls gRPC methods,\nreceives stream of\nresource information
+ResourceSlice-> k8sresourceplugin: consumes
+resourcemanager --> ResourceSlice: publishes
+pluginmanager <-> driverplugin: registers
+@enduml

keps/sig-node/3063-dynamic-resource-allocation/kubelet.png

@@ -25,7 +25,7 @@ stage: alpha
 # The most recent milestone for which work toward delivery of this KEP has been
 # done. This can be the current (upcoming) milestone, if it is being actively
 # worked on.
-latest-milestone: "v1.30"
+latest-milestone: "v1.31"
 
 # The milestone at which this feature was, or is targeted to be, at each stage.
 milestone:
@@ -34,7 +34,12 @@ milestone:
 # The following PRR answers are required at alpha release
 # List the feature gate name and the components for which it must be enabled
 feature-gates:
-  # DynamicResourceAllocation, same as for DRA without this KEP
+  - name: DynamicResourceAllocation
+    components:
+      - kube-apiserver
+      - kube-controller-manager
+      - kube-scheduler
+      - kubelet
 disable-supported: true
 
 # The following PRR answers are required at beta release