Yannis Zarkadas
c8c38d8584
Control logic for the cassandra controller. The controller exists in a separate StatefulSet, watches Kubernetes Objects for changes and acts on those changes to achieve the desired state. Signed-off-by: Yannis Zarkadas <yanniszarkadas@gmail.com>
93 lines
2.4 KiB
Go
93 lines
2.4 KiB
Go
/*
|
||
Copyright 2018 The Rook Authors. All rights reserved.
|
||
|
||
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 controller
|
||
|
||
import (
|
||
cassandrav1alpha1 "github.com/rook/rook/pkg/apis/cassandra.rook.io/v1alpha1"
|
||
corev1 "k8s.io/api/core/v1"
|
||
)
|
||
|
||
const (
|
||
// SuccessSynced is used as part of the Event 'reason' when a Cluster is
|
||
// synced.
|
||
SuccessSynced = "Synced"
|
||
// ErrResourceExists is used as part of the Event 'reason' when a
|
||
// Cluster fails to sync due to a resource of the same name already
|
||
// existing.
|
||
ErrSyncFailed = "ErrSyncFailed"
|
||
|
||
MessageRackCreated = "Rack %s created"
|
||
MessageRackScaledUp = "Rack %s scaled up to %d members"
|
||
|
||
// Messages to display when experiencing an error.
|
||
MessageHeadlessServiceSyncFailed = "Failed to sync Headless Service for cluster"
|
||
MessageMemberServicesSyncFailed = "Failed to sync MemberServices for cluster"
|
||
MessageUpdateStatusFailed = "Failed to update status for cluster"
|
||
MessageClusterSyncFailed = "Failed to sync cluster"
|
||
)
|
||
|
||
// Sync attempts to sync the given Cassandra Cluster.
|
||
// NOTE: the Cluster Object is a DeepCopy. Modify at will.
|
||
func (cc *ClusterController) Sync(c *cassandrav1alpha1.Cluster) error {
|
||
|
||
// Sync Headless Service for Cluster
|
||
if err := cc.syncClusterHeadlessService(c); err != nil {
|
||
cc.recorder.Event(
|
||
c,
|
||
corev1.EventTypeWarning,
|
||
ErrSyncFailed,
|
||
MessageHeadlessServiceSyncFailed,
|
||
)
|
||
return err
|
||
}
|
||
|
||
// Sync Cluster Member Services
|
||
if err := cc.syncMemberServices(c); err != nil {
|
||
cc.recorder.Event(
|
||
c,
|
||
corev1.EventTypeWarning,
|
||
ErrSyncFailed,
|
||
MessageMemberServicesSyncFailed,
|
||
)
|
||
return err
|
||
}
|
||
|
||
// Update Status
|
||
if err := cc.updateStatus(c); err != nil {
|
||
cc.recorder.Event(
|
||
c,
|
||
corev1.EventTypeWarning,
|
||
ErrSyncFailed,
|
||
MessageUpdateStatusFailed,
|
||
)
|
||
return err
|
||
}
|
||
|
||
// Sync Cluster
|
||
if err := cc.syncCluster(c); err != nil {
|
||
cc.recorder.Event(
|
||
c,
|
||
corev1.EventTypeWarning,
|
||
ErrSyncFailed,
|
||
MessageClusterSyncFailed,
|
||
)
|
||
return err
|
||
}
|
||
|
||
return nil
|
||
}
|