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StartInstances

Description

Starts an Amazon EBS-backed AMI that you've previously stopped.

Instances that use Amazon EBS volumes as their root devices can be quickly stopped and started. When an instance is stopped, the compute resources are released and you are not billed for hourly instance usage. However, your root partition Amazon EBS volume remains, continues to persist your data, and you are charged for Amazon EBS volume usage. You can restart your instance at any time. Each time you transition an instance from stopped to started, we charge a full instance hour, even if transitions happen multiple times within a single hour.

	Note
Before stopping an instance, make sure it is in a state from which it can be restarted. Stopping an instance does not preserve data stored in RAM. Performing this operation on an instance that uses an instance store as its root device returns an error.

Note

Before stopping an instance, make sure it is in a state from which it can be restarted. Stopping an instance does not preserve data stored in RAM.

Performing this operation on an instance that uses an instance store as its root device returns an error.

For more information, go to Using Amazon EBS-Backed AMIs and Instances.

Request Parameters

Name Description Required

Name	Description	Required
`InstanceId.n`	One or more instance IDs. Type: String Default: None	Yes

InstanceId.n

One or more instance IDs.

Type: String

Default: None

Yes

Response Elements

The elements in the following table are wrapped in a StartInstancesResponse structure.

Name Description

Name	Description
`requestId`	The ID of the request. Type: xsd:string
`instancesSet`	List of instance state changes. Each change's information is wrapped in an `item` element. Type: InstanceStateChangeType

requestId

The ID of the request.

Type: xsd:string

instancesSet

List of instance state changes. Each change's information is wrapped in an item element.

Type: InstanceStateChangeType

Examples

Example Request

This example starts the i-10a64379 instance.

https://ec2.amazonaws.com/?Action=StartInstances
&InstanceId.1=i-10a64379
&AUTHPARAMS

Example Response

<StartInstancesResponse xmlns="http://ec2.amazonaws.com/doc/2011-12-15/">
  <requestId>59dbff89-35bd-4eac-99ed-be587EXAMPLE</requestId>   
  <instancesSet>
    <item>
      <instanceId>i-10a64379</instanceId>
      <currentState>
          <code>0</code>
          <name>pending</name>
      </currentState>
      <previousState>
          <code>80</code>
          <name>stopped</name>
      </previousState>
    </item>
  </instancesSet>
</StartInstancesResponse>

Document Conventions
Terms of Use