StartInstances

Amazon Elastic Compute Cloud: 2009-10-31

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StartInstances

Description

Starts an instance that uses an Amazon EBS volume as its root device.

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.

[Note]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.

Request Parameters

NameDescriptionRequired

InstanceId

The instance ID.

Type: String

Default: None

Yes

Response Elements

NameDescription

StartInstancesResponseType

StartInstancesResponseType element.

Type:

StartInstancesResponseType

Ancestor: None

Children: requestId, instancesSet

requestId

The ID of the request.

Type: xsd:string

Ancestor: StartInstancesResponseType

Children: None

instancesSet

Instances set.

Type: InstanceStateChangeSetType

Ancestor: StartInstancesResponseType

Children: item

item

The item element.

Type: InstanceStateChangeType

Ancestor: instancesSet

Children: instanceId, currentState, and previousState

instanceId

The instance ID.

Type: xsd:string

Ancestor: item

Children: None

currentState

The current state of the instance.

Type: InstanceStateType

Ancestor: item

Children: code, name

code

A 16-bit unsigned integer. The high byte is an opaque internal value and should be ignored. The low byte is set based on the state represented:

Type: xsd:int

Valid Values: 0 (pending) | 16 (running) | 32 (shutting-down) | 48 (terminated) | 64 (stopping) | 80 (stopped)

Ancestor: currentState

Children: None

name

The current state of the instance.

Type: xsd:string

Valid Values: pending | running | shutting-down | terminated | stopping | stopped

Ancestor: currentState

Children: None

previousState

The previous state of the instance.

Type: InstanceStateType

Ancestor: item

Children: code, name

code

A 16-bit unsigned integer. The high byte is an opaque internal value and should be ignored. The low byte is set based on the state represented:

Type: xsd:int

Valid Values: 0 (pending) | 16 (running) | 32 (shutting-down) | 48 (terminated) | 64 (stopping) | 80 (stopped)

Ancestor: previousState

Children: None

name

The current state of the instance.

Type: xsd:string

Valid Values: pending | running | shutting-down | terminated | stopping | stopped

Ancestor: previousState

Children: None

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/2009-10-31/">
  <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>
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