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120 lines
3.5 KiB
Go
120 lines
3.5 KiB
Go
// +build !providerless
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/*
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Copyright 2016 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package aws
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import (
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"fmt"
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"github.com/aws/aws-sdk-go/aws"
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"github.com/aws/aws-sdk-go/service/ec2"
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csimigration "k8s.io/csi-translation-lib/plugins"
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"k8s.io/klog"
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"k8s.io/apimachinery/pkg/types"
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)
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// EBSVolumeID represents the ID of the volume in the AWS API, e.g.
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// vol-12345678 The "traditional" format is "vol-12345678" A new longer format
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// is also being introduced: "vol-12345678abcdef01" We should not assume
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// anything about the length or format, though it seems reasonable to assume
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// that volumes will continue to start with "vol-".
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type EBSVolumeID string
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func (i EBSVolumeID) awsString() *string {
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return aws.String(string(i))
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}
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// KubernetesVolumeID represents the id for a volume in the kubernetes API;
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// a few forms are recognized:
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// * aws://<zone>/<awsVolumeId>
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// * aws:///<awsVolumeId>
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// * <awsVolumeId>
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type KubernetesVolumeID string
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// DiskInfo returns aws disk information in easy to use manner
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type diskInfo struct {
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ec2Instance *ec2.Instance
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nodeName types.NodeName
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volumeState string
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attachmentState string
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hasAttachment bool
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disk *awsDisk
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}
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// MapToAWSVolumeID extracts the EBSVolumeID from the KubernetesVolumeID
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func (name KubernetesVolumeID) MapToAWSVolumeID() (EBSVolumeID, error) {
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awsID, err := csimigration.KubernetesVolumeIDToEBSVolumeID(string(name))
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if err != nil {
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return "", err
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}
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return EBSVolumeID(awsID), nil
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}
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// GetAWSVolumeID converts a Kubernetes volume ID to an AWS volume ID
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func GetAWSVolumeID(kubeVolumeID string) (string, error) {
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kid := KubernetesVolumeID(kubeVolumeID)
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awsID, err := kid.MapToAWSVolumeID()
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return string(awsID), err
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}
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func (c *Cloud) checkIfAttachedToNode(diskName KubernetesVolumeID, nodeName types.NodeName) (*diskInfo, bool, error) {
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disk, err := newAWSDisk(c, diskName)
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if err != nil {
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return nil, true, err
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}
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awsDiskInfo := &diskInfo{
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disk: disk,
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}
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info, err := disk.describeVolume()
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if err != nil {
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klog.Warningf("Error describing volume %s with %v", diskName, err)
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awsDiskInfo.volumeState = "unknown"
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return awsDiskInfo, false, err
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}
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awsDiskInfo.volumeState = aws.StringValue(info.State)
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if len(info.Attachments) > 0 {
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attachment := info.Attachments[0]
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awsDiskInfo.attachmentState = aws.StringValue(attachment.State)
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instanceID := aws.StringValue(attachment.InstanceId)
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instanceInfo, err := c.getInstanceByID(instanceID)
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// This should never happen but if it does it could mean there was a race and instance
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// has been deleted
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if err != nil {
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fetchErr := fmt.Errorf("error fetching instance %s for volume %s", instanceID, diskName)
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klog.Warning(fetchErr)
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return awsDiskInfo, false, fetchErr
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}
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awsDiskInfo.ec2Instance = instanceInfo
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awsDiskInfo.nodeName = mapInstanceToNodeName(instanceInfo)
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awsDiskInfo.hasAttachment = true
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if awsDiskInfo.nodeName == nodeName {
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return awsDiskInfo, true, nil
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}
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}
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return awsDiskInfo, false, nil
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}
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