VolumeInUse aws resource_error ai_generated true

An error occurred (VolumeInUse) when calling the AttachVolume operation: Volume is already attached to an instance

ID: aws/ec2-ebs-volume-stuck-attaching

Also available as: JSON · Markdown · 中文
80%Fix Rate
88%Confidence
1Evidence
2023-06-10First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
EC2 2016-11-15 active — — —
AWS CLI 2.16.0 active — — —
Amazon Linux 2023 active — — —

Root Cause

An EBS volume is being attached to an EC2 instance but is already attached to another instance, or the volume is in a 'stuck' state due to incomplete detachment.

generic

中文

EBS 卷正在附加到 EC2 实例，但已附加到另一个实例，或者由于分离不完整而处于“卡住”状态。

Official Documentation

https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-attaching-volume.html

Workarounds

  1. 80% success Detach the volume from the current instance using the detach-volume command, wait for the 'available' state, then attach to the desired instance. 
    Detach the volume from the current instance using the detach-volume command, wait for the 'available' state, then attach to the desired instance.
  2. 75% success If the volume is stuck in 'attaching' state, stop the instance it is attached to, then force detach using the AWS Console or CLI with the --force flag, then reattach. 
    If the volume is stuck in 'attaching' state, stop the instance it is attached to, then force detach using the AWS Console or CLI with the --force flag, then reattach.

中文步骤

  1. 使用 detach-volume 命令从当前实例分离卷，等待状态变为 'available'，然后附加到所需实例。
  2. 如果卷卡在 'attaching' 状态，请停止其附加到的实例，然后使用 AWS 控制台或 CLI 的 --force 标志强制分离，然后重新附加。

Dead Ends

Common approaches that don't work:

  1. Force detach the volume from the current instance without proper checks. 65% fail

    Force detach can cause data corruption or leave the volume in an inconsistent state, and may require manual cleanup.

  2. Restart the EC2 instance to which the volume is attached. 90% fail

    Restarting doesn't detach the volume; it remains attached to the same instance.

  3. Attach the volume to a different device name on the same instance. 85% fail

    The error says it's already attached; you cannot attach the same volume twice to the same instance.