EC2MetadataUtils (AWS SDK for Java

java.lang.Object
- com.amazonaws.util.EC2MetadataUtils

```
public class EC2MetadataUtils
extends Object
```
Utility class for retrieving Amazon EC2 instance metadata.
You can use the data to build more generic AMIs that can be modified by configuration files supplied at launch time. For example, if you run web servers for various small businesses, they can all use the same AMI and retrieve their content from the Amazon S3 bucket you specify at launch. To add a new customer at any time, simply create a bucket for the customer, add their content, and launch your AMI.

You can disable the use of the EC2 Instance meta data service by either setting the SDKGlobalConfiguration.AWS_EC2_METADATA_DISABLED_ENV_VAR or SDKGlobalConfiguration.AWS_EC2_METADATA_DISABLED_SYSTEM_PROPERTY to 'true'(not case sensitive). More information about Amazon EC2 Metadata

See Also:

Amazon EC2 User Guide: Instance Metadata

Nested Class Summary

Nested Classes
Modifier and Type	Class and Description
`static class`	`EC2MetadataUtils.IAMInfo` Information about the last time the instance profile was updated, including the instance's LastUpdated date, InstanceProfileArn, and InstanceProfileId.
`static class`	`EC2MetadataUtils.IAMSecurityCredential` The temporary security credentials (AccessKeyId, SecretAccessKey, SessionToken, and Expiration) associated with the IAM role.
`static class`	`EC2MetadataUtils.InstanceInfo` This POJO is a best attempt to capture the instance info which is only guaranteed to be a JSON document per http://docs.aws.amazon.com/AWSEC2/latest /UserGuide/ec2-instance-metadata.html Instance info includes dynamic information about the current instance such as region, instanceId, private IP address, etc.
`static class`	`EC2MetadataUtils.NetworkInterface` All of the metadata associated with a network interface on the instance.

Field Summary

Fields
Modifier and Type Field and Description

static String SECURITY_CREDENTIALS_RESOURCE
Default resource path for credentials in the Amazon EC2 Instance Metadata Service.

Fields
Modifier and Type	Field and Description
`static String`	`SECURITY_CREDENTIALS_RESOURCE` Default resource path for credentials in the Amazon EC2 Instance Metadata Service.

Constructor Summary

Constructors
Constructor and Description

EC2MetadataUtils()

Constructors
Constructor and Description
`EC2MetadataUtils()`

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static String`	`getAmiId()` Get the AMI ID used to launch the instance.
`static String`	`getAmiLaunchIndex()` Get the index of this instance in the reservation.
`static String`	`getAmiManifestPath()` Get the manifest path of the AMI with which the instance was launched.
`static List<String>`	`getAncestorAmiIds()` Get the list of AMI IDs of any instances that were rebundled to created this AMI.
`static String`	`getAvailabilityZone()` Get the Availability Zone in which the instance launched.
`static Map<String,String>`	`getBlockDeviceMapping()` Get the virtual devices associated with the ami, root, ebs, and swap.
`static String`	`getData(String path)`
`static String`	`getData(String path, int tries)`
`static String`	`getEC2InstanceRegion()` Returns the current region of this running EC2 instance; or null if it is unable to do so.
`static String`	`getHostAddressForEC2MetadataService()` Returns the host address of the Amazon EC2 Instance Metadata Service.
`static EC2MetadataUtils.IAMInfo`	`getIAMInstanceProfileInfo()` Get information about the last time the instance profile was updated, including the instance's LastUpdated date, InstanceProfileArn, and InstanceProfileId.
`static Map<String,EC2MetadataUtils.IAMSecurityCredential>`	`getIAMSecurityCredentials()` Returns the temporary security credentials (AccessKeyId, SecretAccessKey, SessionToken, and Expiration) associated with the IAM roles on the instance.
`static String`	`getInstanceAction()` Notifies the instance that it should reboot in preparation for bundling.
`static String`	`getInstanceId()` Get the ID of this instance.
`static EC2MetadataUtils.InstanceInfo`	`getInstanceInfo()` The instance info is only guaranteed to be a JSON document per http://docs .aws.amazon.com/AWSEC2/latest/UserGuide/ec2-instance-metadata.html
`static String`	`getInstanceSignature()` Get the signature of the instance.
`static String`	`getInstanceType()` Get the type of the instance.
`static List<String>`	`getItems(String path)`
`static List<String>`	`getItems(String path, int tries)`
`static String`	`getLocalHostName()` Get the local hostname of the instance.
`static String`	`getMacAddress()` Get the MAC address of the instance.
`static List<EC2MetadataUtils.NetworkInterface>`	`getNetworkInterfaces()` Get the list of network interfaces on the instance.
`static String`	`getPrivateIpAddress()` Get the private IP address of the instance.
`static List<String>`	`getProductCodes()` Get the list of product codes associated with the instance, if any.
`static String`	`getPublicKey()` Get the public key.
`static String`	`getRamdiskId()` Get the ID of the RAM disk specified at launch time, if applicable.
`static String`	`getReservationId()` Get the ID of the reservation.
`static List<String>`	`getSecurityGroups()` Get the list of names of the security groups applied to the instance.
`static String`	`getUserData()` Get the metadata sent to the instance

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - SECURITY_CREDENTIALS_RESOURCE
```
public static final String SECURITY_CREDENTIALS_RESOURCE
```
    Default resource path for credentials in the Amazon EC2 Instance Metadata Service.
    
    See Also:
    
    Constant Field Values
- Constructor Detail
  - EC2MetadataUtils
```
public EC2MetadataUtils()
```
- Method Detail
  - getAmiId
```
public static String getAmiId()
```
    Get the AMI ID used to launch the instance.
  - getAmiLaunchIndex
```
public static String getAmiLaunchIndex()
```
    Get the index of this instance in the reservation.
  - getAmiManifestPath
```
public static String getAmiManifestPath()
```
    Get the manifest path of the AMI with which the instance was launched.
  - getAncestorAmiIds
```
public static List<String> getAncestorAmiIds()
```
    Get the list of AMI IDs of any instances that were rebundled to created this AMI. Will only exist if the AMI manifest file contained an ancestor-amis key.
  - getInstanceAction
```
public static String getInstanceAction()
```
    Notifies the instance that it should reboot in preparation for bundling. Valid values: none | shutdown | bundle-pending.
  - getInstanceId
```
public static String getInstanceId()
```
    Get the ID of this instance.
  - getInstanceType
```
public static String getInstanceType()
```
    Get the type of the instance.
  - getLocalHostName
```
public static String getLocalHostName()
```
    Get the local hostname of the instance. In cases where multiple network interfaces are present, this refers to the eth0 device (the device for which device-number is 0).
  - getMacAddress
```
public static String getMacAddress()
```
    Get the MAC address of the instance. In cases where multiple network interfaces are present, this refers to the eth0 device (the device for which device-number is 0).
  - getPrivateIpAddress
```
public static String getPrivateIpAddress()
```
    Get the private IP address of the instance. In cases where multiple network interfaces are present, this refers to the eth0 device (the device for which device-number is 0).
  - getAvailabilityZone
```
public static String getAvailabilityZone()
```
    Get the Availability Zone in which the instance launched.
  - getProductCodes
```
public static List<String> getProductCodes()
```
    Get the list of product codes associated with the instance, if any.
  - getPublicKey
```
public static String getPublicKey()
```
    Get the public key. Only available if supplied at instance launch time.
  - getRamdiskId
```
public static String getRamdiskId()
```
    Get the ID of the RAM disk specified at launch time, if applicable.
  - getReservationId
```
public static String getReservationId()
```
    Get the ID of the reservation.
  - getSecurityGroups
```
public static List<String> getSecurityGroups()
```
    Get the list of names of the security groups applied to the instance.
  - getIAMInstanceProfileInfo
```
public static EC2MetadataUtils.IAMInfo getIAMInstanceProfileInfo()
```
    Get information about the last time the instance profile was updated, including the instance's LastUpdated date, InstanceProfileArn, and InstanceProfileId.
  - getInstanceInfo
```
public static EC2MetadataUtils.InstanceInfo getInstanceInfo()
```
    The instance info is only guaranteed to be a JSON document per http://docs .aws.amazon.com/AWSEC2/latest/UserGuide/ec2-instance-metadata.html
    This method is only a best attempt to capture the instance info as a typed object.
    Get an InstanceInfo object with dynamic information about this instance.
  - getInstanceSignature
```
public static String getInstanceSignature()
```
    Get the signature of the instance.
  - getEC2InstanceRegion
```
public static String getEC2InstanceRegion()
```
    Returns the current region of this running EC2 instance; or null if it is unable to do so. The method avoids interpreting other parts of the instance info JSON document to minimize potential failure.
    The instance info is only guaranteed to be a JSON document per http://docs .aws.amazon.com/AWSEC2/latest/UserGuide/ec2-instance-metadata.html
  - getIAMSecurityCredentials
```
public static Map<String,EC2MetadataUtils.IAMSecurityCredential> getIAMSecurityCredentials()
```
    Returns the temporary security credentials (AccessKeyId, SecretAccessKey, SessionToken, and Expiration) associated with the IAM roles on the instance.
  - getBlockDeviceMapping
```
public static Map<String,String> getBlockDeviceMapping()
```
    Get the virtual devices associated with the ami, root, ebs, and swap.
  - getNetworkInterfaces
```
public static List<EC2MetadataUtils.NetworkInterface> getNetworkInterfaces()
```
    Get the list of network interfaces on the instance.
  - getUserData
```
public static String getUserData()
```
    Get the metadata sent to the instance
  - getData
```
public static String getData(String path)
```
  - getData
```
public static String getData(String path,
                             int tries)
```
  - getItems
```
public static List<String> getItems(String path)
```
    Parameters:
    
    path - Path to query.
    
    Returns:
    
    List of items for given path or null if path does not exist.
  - getItems
```
public static List<String> getItems(String path,
                                    int tries)
```
    Parameters:
    
    path - Path to query.
    
    tries - Number of attempts to query EC2 metadata service for items.
    
    Returns:
    
    List of items for given path or null if path does not exist.
  - getHostAddressForEC2MetadataService
```
public static String getHostAddressForEC2MetadataService()
```
    Returns the host address of the Amazon EC2 Instance Metadata Service.

Class EC2MetadataUtils

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

SECURITY_CREDENTIALS_RESOURCE

Constructor Detail

EC2MetadataUtils

Method Detail

getAmiId

getAmiLaunchIndex

getAmiManifestPath

getAncestorAmiIds

getInstanceAction

getInstanceId

getInstanceType

getLocalHostName

getMacAddress

getPrivateIpAddress

getAvailabilityZone

getProductCodes

getPublicKey

getRamdiskId

getReservationId

getSecurityGroups

getIAMInstanceProfileInfo

getInstanceInfo

getInstanceSignature

getEC2InstanceRegion

getIAMSecurityCredentials

getBlockDeviceMapping

getNetworkInterfaces

getUserData

getData

getData

getItems

getItems

getHostAddressForEC2MetadataService