StartInstances
Starts an Amazon EBS-backed instance 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 instance usage. However, your root partition Amazon EBS volume remains and continues to persist your data, and you are charged for Amazon EBS volume usage. You can restart your instance at any time. Every time you start your instance, Amazon EC2 charges a one-minute minimum for instance usage, and thereafter charges per second for instance usage.
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.
If you attempt to start a T3 instance with host
tenancy and the
unlimited
CPU credit option, the request fails. The
unlimited
CPU credit option is not supported on Dedicated Hosts. Before
you start the instance, either change its CPU credit option to standard
, or
change its tenancy to default
or dedicated
.
For more information, see Stop and start Amazon EC2 instances in the Amazon EC2 User Guide.
Request Parameters
The following parameters are for this specific action. For more information about required and optional parameters that are common to all actions, see Common Query Parameters.
- AdditionalInfo
-
Reserved.
Type: String
Required: No
- DryRun
-
Checks whether you have the required permissions for the operation, without actually making the request, and provides an error response. If you have the required permissions, the error response is
DryRunOperation
. Otherwise, it isUnauthorizedOperation
.Type: Boolean
Required: No
- InstanceId.N
-
The IDs of the instances.
Type: Array of strings
Required: Yes
Response Elements
The following elements are returned by the service.
- instancesSet
-
Information about the started instances.
Type: Array of InstanceStateChange objects
- requestId
-
The ID of the request.
Type: String
Errors
For information about the errors that are common to all actions, see Common client error codes.
Examples
Example
This example starts the specified instance.
Sample Request
https://ec2.amazonaws.com/?Action=StartInstances
&InstanceId.1=i-1234567890abcdef0
&AUTHPARAMS
Sample Response
<StartInstancesResponse xmlns="http://ec2.amazonaws.com/doc/2016-11-15/">
<requestId>59dbff89-35bd-4eac-99ed-be587EXAMPLE</requestId>
<instancesSet>
<item>
<instanceId>i-1234567890abcdef0</instanceId>
<currentState>
<code>0</code>
<name>pending</name>
</currentState>
<previousState>
<code>80</code>
<name>stopped</name>
</previousState>
</item>
</instancesSet>
</StartInstancesResponse>
See Also
For more information about using this API in one of the language-specific AWS SDKs, see the following: