You can subscribe to notifications for the following block storage 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 block storage events:

System events

Block storage system events are caused only by exceptions. ECS sends two notifications: one at the start time of the event and one at the end time. 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 contains the executeStartTime field: 
    {
  "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 additionally contains the executeFinishTime field: 
    {
  "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 sub-fields in the content field.
Field Description Example
eventId The ID of the event. e-t4navn7********6x5no
diskId The ID of the Block Storage device whose performance is affected. d-t4ndyqve********n4ds
device The mount point of the Block Storage device. /dev/xvdb
eventType The type of the event. Valid values:
  • Degraded: The performance of the Block Storage device is degraded.
  • SeverelyDegraded: The performance of the Block Storage device is severely degraded.
  • Stalled: The performance of the Block Storage device is severely affected.
Stalled
executeStartTime The time when the event starts (UTC+0). 2019-04-10T01:01:01Z
executeFinishTime The time when the event ends (UTC+0). 2019-04-10T01:03:01Z
ecsInstanceId The ID of the ECS instance to which the Block Storage device is attached. i-bp1ecr********5go2go
ecsInstanceName The name of the ECS instance to which the Block Storage 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 sub-fields in the content field.
Field Description Example
diskId The ID of the disk. d-bp1bwa********9ol4mi
operation The operation type. Valid values:
  • AttachDisk: attaches a disk.
  • DetachDisk: detaches a disk.
AttachDisk
result The operation result. Valid values:
  • accomplished: The operation succeeded.
  • failed: The operation failed.
Note If the operation succeeds, the level of the event is INFO. If the operation fails, the level of the event is WARN.
accomplished

Disk retaining

You can clear Release with Instance for disks, including system and data disks. The disks will be 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 sub-fields in the content field.
Field Description Example
diskId The ID of the disk. d-bp1bwa********9ol4mi
result The operation result. Valid values:
  • accomplished: The operation succeeded.
  • failed: The operation failed.
accomplished

Disk release due to overdue payments

You may receive a disk release notification in the following scenarios:
  • You purchased a disk in a mainland China region but your account does not pass real-name verification. As a result, subscription disks cannot be converted to pay-as-you-go disks.
  • 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 sub-fields in the content field.
Field 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