[Feature] SchedulerName Pod Customization (#794)

Author: ajanikow

CHANGELOG.md

@@ -9,7 +9,8 @@
 - Changing the topics' log level without restarting the container.
   When the topic is removed from the argument list then it will not 
   be turned off in the ArangoDB automatically.
-  
+- Allow to customize SchedulerName inside Member Pod
+
 ## [1.2.2](https://github.com/arangodb/kube-arangodb/tree/1.2.2) (2021-09-09)
 - Update 'github.com/arangodb/arangosync-client' dependency to v0.7.0
 - Add HighPriorityPlan to ArangoDeployment Status

pkg/apis/deployment/v1/server_group_spec.go

@@ -81,6 +81,8 @@ type ServerGroupSpec struct {
 	Args []string `json:"args,omitempty"`
 	// Entrypoint overrides container executable
 	Entrypoint *string `json:"entrypoint,omitempty"`
+	// SchedulerName define scheduler name used for group
+	SchedulerName *string `json:"schedulerName,omitempty"`
 	// StorageClassName specifies the classname for storage of the servers.
 	StorageClassName *string `json:"storageClassName,omitempty"`
 	// Resources holds resource requests & limits

pkg/apis/deployment/v1/zz_generated.deepcopy.go

@@ -49,7 +49,7 @@ func (a ActionType) String() string {
 // Priority returns plan priority
 func (a ActionType) Priority() ActionPriority {
 	switch a {
-	case ActionTypeMemberPhaseUpdate, ActionTypeMemberRIDUpdate, ActionTypeSetMemberCondition, ActionTypeBootstrapSetAgencyInfo:
+	case ActionTypeMemberPhaseUpdate, ActionTypeMemberRIDUpdate, ActionTypeSetMemberCondition:
 		return ActionPriorityHigh
 	default:
 		return ActionPriorityNormal
@@ -165,8 +165,6 @@ const (
 	ActionTypeArangoMemberUpdatePodSpec ActionType = "ArangoMemberUpdatePodSpec"
 	// ActionTypeArangoMemberUpdatePodStatus updates pod spec
 	ActionTypeArangoMemberUpdatePodStatus ActionType = "ArangoMemberUpdatePodStatus"
-	// ActionTypeBootstrapSetAgencyInfo set agency info into state
-	ActionTypeBootstrapSetAgencyInfo ActionType = "BootstrapSetAgencyInfo"
 
 	// Runtime Updates
 	// ActionTypeRuntimeContainerImageUpdate updates container image in runtime

pkg/apis/deployment/v2alpha1/plan.go

@@ -81,6 +81,8 @@ type ServerGroupSpec struct {
 	Args []string `json:"args,omitempty"`
 	// Entrypoint overrides container executable
 	Entrypoint *string `json:"entrypoint,omitempty"`
+	// SchedulerName define scheduler name used for group
+	SchedulerName *string `json:"schedulerName,omitempty"`
 	// StorageClassName specifies the classname for storage of the servers.
 	StorageClassName *string `json:"storageClassName,omitempty"`
 	// Resources holds resource requests & limits

pkg/apis/deployment/v2alpha1/server_group_spec.go

@@ -571,6 +571,10 @@ func (m *MemberArangoDPod) createMetricsExporterSidecarExternalExporter() *core.
 func (m *MemberArangoDPod) ApplyPodSpec(p *core.PodSpec) error {
 	p.SecurityContext = m.groupSpec.SecurityContext.NewPodSecurityContext()
 
+	if s := m.groupSpec.SchedulerName; s != nil {
+		p.SchedulerName = *s
+	}
+
 	return nil
 }
 

pkg/apis/deployment/v2alpha1/zz_generated.deepcopy.go

@@ -315,6 +315,10 @@ func (m *MemberSyncPod) Validate(cachedStatus interfaces.Inspector) error {
 }
 
 func (m *MemberSyncPod) ApplyPodSpec(spec *core.PodSpec) error {
+	if s := m.groupSpec.SchedulerName; s != nil {
+		spec.SchedulerName = *s
+	}
+
 	return nil
 }
 

pkg/deployment/resources/pod_creator_arangod.go

@@ -0,0 +1,37 @@
+//
+// DISCLAIMER
+//
+// Copyright 2020 ArangoDB GmbH, Cologne, Germany
+//
+// 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.
+//
+// Copyright holder is ArangoDB GmbH, Cologne, Germany
+//
+
+package rotation
+
+import (
+	api "github.com/arangodb/kube-arangodb/pkg/apis/deployment/v1"
+	core "k8s.io/api/core/v1"
+)
+
+func podCompare(_ api.DeploymentSpec, _ api.ServerGroup, spec, status *core.PodSpec) compareFunc {
+	return func(builder api.ActionBuilder) (mode Mode, plan api.Plan, err error) {
+		if spec.SchedulerName != status.SchedulerName {
+			status.SchedulerName = spec.SchedulerName
+			mode = mode.And(SilentRotation)
+		}
+
+		return
+	}
+}

pkg/deployment/resources/pod_creator_sync.go

@@ -0,0 +1,69 @@
+//
+// DISCLAIMER
+//
+// Copyright 2020-2021 ArangoDB GmbH, Cologne, Germany
+//
+// 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.
+//
+// Copyright holder is ArangoDB GmbH, Cologne, Germany
+//
+// Author Adam Janikowski
+//
+
+package rotation
+
+import (
+	"testing"
+
+	core "k8s.io/api/core/v1"
+)
+
+func Test_ArangoD_SchedulerName(t *testing.T) {
+	testCases := []TestCase{
+		{
+			name: "Change SchedulerName from Empty",
+			spec: buildPodSpec(func(pod *core.PodTemplateSpec) {
+				pod.Spec.SchedulerName = ""
+			}),
+			status: buildPodSpec(func(pod *core.PodTemplateSpec) {
+				pod.Spec.SchedulerName = "new"
+			}),
+
+			expectedMode: SilentRotation,
+		},
+		{
+			name: "Change SchedulerName into Empty",
+			spec: buildPodSpec(func(pod *core.PodTemplateSpec) {
+				pod.Spec.SchedulerName = "new"
+			}),
+			status: buildPodSpec(func(pod *core.PodTemplateSpec) {
+				pod.Spec.SchedulerName = ""
+			}),
+
+			expectedMode: SilentRotation,
+		},
+		{
+			name: "SchedulerName equals",
+			spec: buildPodSpec(func(pod *core.PodTemplateSpec) {
+				pod.Spec.SchedulerName = ""
+			}),
+			status: buildPodSpec(func(pod *core.PodTemplateSpec) {
+				pod.Spec.SchedulerName = ""
+			}),
+
+			expectedMode: SkippedRotation,
+		},
+	}
+
+	runTestCases(t)(testCases...)
+}