sync.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 sidecar

import (
	"fmt"
	"github.com/rook/rook/pkg/operator/cassandra/constants"
	"github.com/rook/rook/pkg/operator/cassandra/controller/util"
	"github.com/yanniszark/go-nodetool/nodetool"
	"k8s.io/api/core/v1"
)

func (m *MemberController) Sync(memberService *v1.Service) error {

	// Check if member must decommission
	if decommission, ok := memberService.Labels[constants.DecommissionLabel]; ok {
		// Check if member has already decommissioned
		if decommission == constants.LabelValueTrue {
			return nil
		}
		// Else, decommission member
		if err := m.nodetool.Decommission(); err != nil {
			m.logger.Errorf("Error during decommission: %s", err.Error())
		}
		// Confirm memberService has been decommissioned
		if opMode, err := m.nodetool.OperationMode(); err != nil || opMode != nodetool.NodeOperationModeDecommissioned {
			return fmt.Errorf("error during decommission, operation mode: %s, error: %v", opMode, err)
		}
		// Update Label
		old := memberService.DeepCopy()
		memberService.Labels[constants.DecommissionLabel] = constants.LabelValueTrue
		if err := util.PatchService(old, memberService, m.kubeClient); err != nil {
			return fmt.Errorf("error patching MemberService, %s", err.Error())
		}

	}

	return nil
}