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Merge pull request #83567 from jsafrane/fix-aws-stale-describe
Fix attachment of just detached AWS volumes
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commit
1fcd46c250
@ -47,7 +47,7 @@ import (
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"github.com/aws/aws-sdk-go/service/kms"
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"github.com/aws/aws-sdk-go/service/sts"
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"gopkg.in/gcfg.v1"
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"k8s.io/api/core/v1"
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v1 "k8s.io/api/core/v1"
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"k8s.io/klog"
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"k8s.io/apimachinery/pkg/api/resource"
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@ -63,7 +63,7 @@ import (
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"k8s.io/client-go/pkg/version"
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"k8s.io/client-go/tools/cache"
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"k8s.io/client-go/tools/record"
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"k8s.io/cloud-provider"
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cloudprovider "k8s.io/cloud-provider"
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nodehelpers "k8s.io/cloud-provider/node/helpers"
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servicehelpers "k8s.io/cloud-provider/service/helpers"
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cloudvolume "k8s.io/cloud-provider/volume"
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@ -1861,6 +1861,7 @@ func (c *Cloud) getMountDevice(
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assign bool) (assigned mountDevice, alreadyAttached bool, err error) {
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deviceMappings := map[mountDevice]EBSVolumeID{}
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volumeStatus := map[EBSVolumeID]string{} // for better logging of volume status
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for _, blockDevice := range info.BlockDeviceMappings {
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name := aws.StringValue(blockDevice.DeviceName)
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if strings.HasPrefix(name, "/dev/sd") {
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@ -1872,6 +1873,10 @@ func (c *Cloud) getMountDevice(
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if len(name) < 1 || len(name) > 2 {
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klog.Warningf("Unexpected EBS DeviceName: %q", aws.StringValue(blockDevice.DeviceName))
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}
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if blockDevice.Ebs != nil && blockDevice.Ebs.VolumeId != nil {
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volumeStatus[EBSVolumeID(*blockDevice.Ebs.VolumeId)] = aws.StringValue(blockDevice.Ebs.Status)
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}
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deviceMappings[mountDevice(name)] = EBSVolumeID(aws.StringValue(blockDevice.Ebs.VolumeId))
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}
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@ -1889,7 +1894,15 @@ func (c *Cloud) getMountDevice(
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for mountDevice, mappingVolumeID := range deviceMappings {
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if volumeID == mappingVolumeID {
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if assign {
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klog.Warningf("Got assignment call for already-assigned volume: %s@%s", mountDevice, mappingVolumeID)
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// DescribeInstances shows the volume as attached / detaching, while Kubernetes
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// cloud provider thinks it's detached.
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// This can happened when the volume has just been detached from the same node
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// and AWS API returns stale data in this DescribeInstances ("eventual consistency").
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// Fail the attachment and let A/D controller retry in a while, hoping that
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// AWS API returns consistent result next time (i.e. the volume is detached).
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status := volumeStatus[mappingVolumeID]
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klog.Warningf("Got assignment call for already-assigned volume: %s@%s, volume status: %s", mountDevice, mappingVolumeID, status)
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return mountDevice, false, fmt.Errorf("volume is still being detached from the node")
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}
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return mountDevice, true, nil
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}
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