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detachvolume_instance.go
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/
detachvolume_instance.go
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/*
// Copyright (c) 2016 Intel Corporation
//
// 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 main
import (
storage "github.com/01org/ciao/ciao-storage"
"github.com/01org/ciao/payloads"
"github.com/golang/glog"
)
func processDetachVolume(storageDriver storage.BlockDriver, monitorCh chan interface{}, cfg *vmConfig, instance, instanceDir, volumeUUID string, conn serverConn) *detachVolumeError {
vol := cfg.findVolume(volumeUUID)
if vol == nil {
detachErr := &detachVolumeError{nil, payloads.DetachVolumeNotAttached}
glog.Errorf("%s not attached to attach instance %s [%s]",
volumeUUID, instance, string(detachErr.code))
return detachErr
}
if cfg.Image == "" && vol.Bootable {
glog.Errorf("Unable to detach volume %s from instance %s. Volume is bootable!", volumeUUID, instance)
attachErr := &detachVolumeError{nil, payloads.DetachVolumeDetachFailure}
return attachErr
}
if monitorCh != nil {
responseCh := make(chan error)
monitorCh <- virtualizerDetachCmd{
responseCh: responseCh,
volumeUUID: volumeUUID,
}
glog.Infof("Detaching Volume %v", volumeUUID)
err := <-responseCh
if err != nil {
glog.Errorf("Unable to detach volume %s from instance %s", volumeUUID, instance)
attachErr := &detachVolumeError{err, payloads.DetachVolumeDetachFailure}
return attachErr
}
}
// May fail if other instances are using the same device. We'll ignore error for now
// but we might be able to get good error info out of rbd.
_ = storageDriver.UnmapVolumeFromNode(volumeUUID)
oldVols := cfg.Volumes
cfg.removeVolume(volumeUUID)
err := cfg.save(instanceDir)
if err != nil {
// TODO: What should I do here. Try to re-attach?
cfg.Volumes = oldVols
detachErr := &detachVolumeError{err, payloads.DetachVolumeDetachFailure}
glog.Errorf("Unable to persist instance %s state [%s]: %v",
instance, string(detachErr.code), err)
return detachErr
}
return nil
}