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add_process_groups.go
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add_process_groups.go
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/*
* add_process_groups.go
*
* This source file is part of the FoundationDB open source project
*
* Copyright 2021 Apple Inc. and the FoundationDB project 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.
*/
package controllers
import (
"context"
"fmt"
"github.com/go-logr/logr"
corev1 "k8s.io/api/core/v1"
fdbv1beta2 "github.com/FoundationDB/fdb-kubernetes-operator/api/v1beta2"
)
// addProcessGroups provides a reconciliation step for adding new pods to a cluster.
type addProcessGroups struct{}
// reconcile runs the reconciler's work.
func (a addProcessGroups) reconcile(ctx context.Context, r *FoundationDBClusterReconciler, cluster *fdbv1beta2.FoundationDBCluster, _ *fdbv1beta2.FoundationDBStatus, logger logr.Logger) *requeue {
desiredCountStruct, err := cluster.GetProcessCountsWithDefaults()
if err != nil {
return &requeue{curError: err}
}
desiredCounts := desiredCountStruct.Map()
processCounts, processGroupIDs, err := cluster.GetCurrentProcessGroupsAndProcessCounts()
if err != nil {
return &requeue{curError: err}
}
hasNewProcessGroups := false
for _, processClass := range fdbv1beta2.ProcessClasses {
desiredCount := desiredCounts[processClass]
if desiredCount < 0 {
desiredCount = 0
}
newCount := desiredCount - processCounts[processClass]
if newCount <= 0 {
continue
}
logger.Info("Adding new Process Groups", "processClass", processClass, "newCount", newCount, "desiredCount", desiredCount, "currentCount", processCounts[processClass])
r.Recorder.Event(cluster, corev1.EventTypeNormal, "AddingProcesses", fmt.Sprintf("Adding %d %s processes", newCount, processClass))
idNum := 1
for i := 0; i < newCount; i++ {
var processGroupID fdbv1beta2.ProcessGroupID
processGroupID, idNum = cluster.GetNextProcessGroupID(processClass, processGroupIDs[processClass], idNum)
cluster.Status.ProcessGroups = append(cluster.Status.ProcessGroups, fdbv1beta2.NewProcessGroupStatus(processGroupID, processClass, nil))
// Increase the idNum here, since we just added a Process Group with this ID number.
idNum++
}
hasNewProcessGroups = true
}
if hasNewProcessGroups {
err = r.updateOrApply(ctx, cluster)
if err != nil {
return &requeue{curError: err}
}
}
return nil
}