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stop_signal_rename_sample.go
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stop_signal_rename_sample.go
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// Copyright 2017 VMware, Inc. 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 plugin1
import (
"context"
"fmt"
log "github.com/Sirupsen/logrus"
"github.com/vmware/vic/lib/migration/errors"
"github.com/vmware/vic/lib/migration/manager"
"github.com/vmware/vic/pkg/trace"
"github.com/vmware/vic/pkg/vsphere/extraconfig"
"github.com/vmware/vic/pkg/vsphere/session"
)
// sample plugin to migrate data in appliance configuration VirtualContainerHost
// If only a couple of items changed in the configuration, you don't have to copy all VirtualContainerHost. Only define the few items used by
// this upgrade plugin will simplify the extraconfig encoding/decoding process
const (
version = 1
target = manager.ApplianceConfigure
)
func init() {
defer trace.End(trace.Begin(fmt.Sprintf("Registering plugin %s:%d", target, version)))
if err := manager.Migrator.Register(version, target, &ApplianceStopSignalRename{}); err != nil {
log.Errorf("Failed to register plugin %s:%d, %s", target, version, err)
}
}
// ApplianceStopSignalRename is plugin for vic 0.8.0-GA version upgrade
type ApplianceStopSignalRename struct {
}
type OldStopSignal struct {
ExecutorConfig `vic:"0.1" scope:"read-only" key:"init"`
}
type ExecutorConfig struct {
Sessions map[string]*SessionConfig `vic:"0.1" scope:"read-only" key:"sessions"`
}
type SessionConfig struct {
StopSignal string `vic:"0.1" scope:"read-only" key:"stopSignal"`
}
type NewStopSignal struct {
NewExecutorConfig `vic:"0.1" scope:"read-only" key:"init"`
}
type NewExecutorConfig struct {
Sessions map[string]*NewSessionConfig `vic:"0.1" scope:"read-only" key:"sessions"`
}
type NewSessionConfig struct {
StopSignal string `vic:"0.1" scope:"read-only" key:"forceStopSignal"`
}
func (p *ApplianceStopSignalRename) Migrate(ctx context.Context, s *session.Session, data interface{}) error {
defer trace.End(trace.Begin(fmt.Sprintf("%d", version)))
if data == nil {
return nil
}
mapData := data.(map[string]string)
oldStruct := &OldStopSignal{}
result := extraconfig.Decode(extraconfig.MapSource(mapData), oldStruct)
if result == nil {
return &errors.DecodeError{}
}
keys := extraconfig.CalculateKeys(oldStruct, "ExecutorConfig.Sessions.*.StopSignal", "")
for _, key := range keys {
log.Debugf("old %s:%s", key, mapData[key])
}
newStruct := &NewStopSignal{}
if len(oldStruct.ExecutorConfig.Sessions) == 0 {
return nil
}
newStruct.Sessions = make(map[string]*NewSessionConfig)
for id, sess := range oldStruct.ExecutorConfig.Sessions {
newSess := &NewSessionConfig{}
newSess.StopSignal = sess.StopSignal
newStruct.Sessions[id] = newSess
}
cfg := make(map[string]string)
extraconfig.Encode(extraconfig.MapSink(cfg), newStruct)
// remove old data
for _, key := range keys {
delete(mapData, key)
}
for k, v := range cfg {
log.Debugf("New data: %s:%s", k, v)
mapData[k] = v
}
return nil
}