You can subscribe to notifications for the following Elastic Block Storage (EBS) events: system events, data disk attaching or detaching, disk retaining, and disk release due to overdue payments.

Events

You can subscribe to notifications for the following EBS events:

System events

EBS system events are caused only by exceptions. Elastic Compute Service (ECS) sends two notifications: one at the start time of the event and the other at the end time of the event. For the event notification names of different system events, see Appendix: event notification names.

The following notifications are example notifications in the JSON format for a Stalled event that has a severe impact on disk performance.

  • The initial notification that ECS sends you when the event starts contains the executeStartTime parameter. 
    {
  "ver": "1.0",
  "id": "2256A988-0B26-4E2B-820A-8A********E5",
  "product": "ECS",
  "resourceId": "acs:ecs:cn-hangzhou:169070********30:disk/d-t4ndyqve********n4ds",
  "level": "CRITICAL",
  "name": "Disk:Stalled:Executing",
  "userId": "169070********30",
  "eventTime": "20190410T080101.922+0800",
  "regionId": "cn-hangzhou",
  "content": {
    "eventId": "e-t4navn7********6x5no",
    "diskId": "d-t4ndyqve********n4ds",
    "device": "/dev/xvdb",
    "eventType": "Stalled",
    "executeStartTime": "2019-04-10T01:01:01Z",
    "ecsInstanceId": "i-bp1ecr********5go2go",
    "ecsInstanceName": "ecs-instance-name"
  }
}
  • The notification that ECS sends you when the event ends contains the executeFinishTime parameter. 
    {
  "ver": "1.0",
  "id": "2256A988-0B26-4E2B-820A-8A********E5",
  "product": "ECS",
  "resourceId": "acs:ecs:cn-hangzhou:169070********30:disk/d-t4ndyqve********n4ds",
  "level": "CRITICAL",
  "name": "Disk:Stalled:Executing",
  "userId": "169070********30",
  "eventTime": "20190410T080301.922+0800",
  "regionId": "cn-hangzhou",
  "content": {
    "eventId": "e-t4navn7********6x5no",   
    "diskId": "d-t4ndyqve********n4ds",    
    "device": "/dev/xvdb",                 
    "eventType": "Stalled",                
    "executeStartTime": "2019-04-10T01:01:01Z",   
    "executeFinishTime": "2019-04-10T01:03:01Z",  
    "ecsInstanceId": "i-bp1ecr********5go2go",    
    "ecsInstanceName": "ecs-instance-name"        
  }
}
The following table describes parameters in the content field.
Parameter Description Example
eventId The ID of the system event. e-t4navn7********6x5no
diskId The ID of the EBS device whose performance is affected. d-t4ndyqve********n4ds
device The mount point of the EBS device. /dev/xvdb
eventType The type of the system event. Valid values:
  • Degraded: The performance of the EBS device is degraded.
  • SeverelyDegraded: The performance of the EBS device is severely degraded.
  • Stalled: The performance of the EBS device is severely affected.
Stalled
executeStartTime The start time of the system event. The time is in UTC. 2019-04-10T01:01:01Z
executeFinishTime The end time of the system event. The time is in UTC. 2019-04-10T01:03:01Z
ecsInstanceId The ID of the instance to which the EBS device is attached. i-bp1ecr********5go2go
ecsInstanceName The name of the instance to which the EBS device is attached. ecs-instance-name

Data disk attaching or detaching

After a data disk is attached to or detached from an instance, ECS sends you a notification to indicate whether the attach or detach operation is successful. For more information, see Attach a data disk and Detach a data disk.

The following code shows the event notification in the JSON format:

{
  "ver": "1.0",
  "id": "2256A988-0B26-4E2B-820A-8A********E5",
  "product": "ECS",
  "resourceId": "acs:ecs:cn-hangzhou:169070********30:disk/d-t4ndyqve********n4ds",
  "level": "INFO",
  "name": "Disk:DiskOperationCompleted",
  "userId": "169070********30",
  "eventTime": "20190409T121826.922+0800",
  "regionId": "cn-hangzhou",
  "content": {
      "diskId" : "d-t4ndyqve********n4ds",
      "operation" : "AttachDisk",
      "result" : "accomplished"
  }
}
The following table describes parameters in the content field.
Parameter Description Example
diskId The ID of the disk. d-bp1bwa********9ol4mi
operation The type of the operation. Valid values:
  • AttachDisk: attaches a disk.
  • DetachDisk: detaches a disk.
AttachDisk
result The result of the operation. Valid values:
  • accomplished: The operation succeeds.
  • failed: The operation fails.
Note If the operation succeeds, the level value of the event is INFO. If the operation fails, the level value of the event is WARN.
accomplished

Disk retaining

You can disable Release with Instance for disks, including system and data disks. The disks are retained and converted to pay-as-you-go data disks when their attached instances are released. For more information, see Release a disk.

The following code shows the event notification in the JSON format: 
{
    "ver": "1.0",
    "id": "2256A988-0B26-4E2B-820A-8A0580D0B8E5",
    "product": "ECS",
    "resourceId": "acs:ecs:cn-hangzhou:169070********30:disk/d-t4ndyqve********n4ds",
    "level": "INFO",
    "instanceName": "disk-event-subscription",
    "name": "Disk:ConvertToPostpaidCompleted",
    "userId": "169070********30",
    "eventTime": "20190409T121826.922+0800",
    "regionId": "cn-hangzhou",
    "content": {
    "diskId" : "d-t4ndyqve********n4ds",
    "result" : "accomplished"
    }
}
The following table describes parameters in the content field.
Parameter Description Example
diskId The ID of the disk. d-bp1bwa********9ol4mi
result The result of the operation. Valid values:
  • accomplished: The operation succeeds.
  • failed: The operation fails.
accomplished

Disk release due to overdue payments

You may receive a disk release notification in the following scenarios:
  • Your EBS devices are located in mainland China, but real-name verification is not complete for your account.
  • Your pay-as-you-go disk is released because you have an overdue payment in your account.
The following code shows the event notification in the JSON format: 
{
    "ver": "1.0",
    "id": "2256A988-0B26-4E2B-820A-8A0580D0B8E5",
    "product": "ECS",
    "resourceId": "acs:ecs:cn-hangzhou:169070********30:disk/d-t4ndyqve********n4ds",
    "level": "CRITICAL",
    "instanceName": "disk-event-subscription",
    "name": "Disk:OverduePaymentRelease",
    "userId": "169070********30",
    "eventTime": "20190409T121826.922+0800",
    "regionId": "cn-hangzhou",
    "content": {
    "instanceId" : "i-bp1792********an2ukf",
    "diskId" : "d-t4ndyqve********n4ds"
    }
}
The following table describes parameters in the content field.
Parameter Description Example
instanceId The ID of the instance to which the disk is attached. i-bp1792********an2ukf
diskId The ID of the disk. d-bp1bwa********9ol4mi

Appendix: event notification names

Event Event type and code Event notification name and code
Performance impact Severe impact on disk performance: Stalled
  • Start of severe impact on disk performance: Disk:Stalled:Executing
  • End of severe impact on disk performance: Disk:Stalled:Executed
Local disk damage Local disks damaged: ErrorDetected
  • Start of local disk damage alert: Disk:ErrorDetected:Executing
  • End of local disk damage alert: Disk:ErrorDetected:Executed