Ubuntu Manpage: ec2-metadata - Retrieve instance metadata from within a running EC2 instance

NAME

       ec2-metadata - Retrieve instance metadata from within a running EC2 instance

SYNOPSIS

       ec2-metadata [options]

DESCRIPTION

The ec2-metadata program is a utility to retrieve EC2 instance metadata from within a
running EC2 instance.

Instance metadata is data about your instance that you can use to configure or manage the
running instance. Instance metadata is divided into categories, for example, host name,
events, and security groups.

You can also use instance metadata to access user data that you specified when launching
your instance. For example, you can specify parameters for configuring your instance, or
include a simple script. You can build generic AMIs and use user data to modify the
configuration files supplied at launch time. For example, if you run web servers for
various small businesses, they can all use the same generic AMI and retrieve their content
from the Amazon S3 bucket that you specify in the user data at launch. To add a new
customer at any time, create a bucket for the customer, add their content, and launch your
AMI with the unique bucket name provided to your code in the user data. If you launch more
than one instance at the same time, the user data is available to all instances in that
reservation. Each instance that is part of the same reservation has a unique ami-launch-
index number, allowing you to write code that controls what to do. For example, the first
host might elect itself as an initial master node in a cluster.

OPTIONS

       ec2-metadata  will  print all known metadata fields by default.  The following options can
       be used to restrict the output to the selected fields.

       --all Show all metadata information for this host (also default).

       -a/--ami-id The AMI ID used to launch this instance

       -l/--ami-launch-index
              The index of this instance in the reservation (per AMI).

       -m/--ami-manifest-path
              The manifest path of the AMI with which the instance was launched.

       -n/--ancestor-ami-ids
              The AMI IDs of any instances that were rebundled to create this AMI.

       -b/--block-device-mapping
              Defines native device names to use when exposing virtual devices.

       -i/--instance-id
              The ID of this instance

       -t/--instance-type
              The type of instance to launch. For more information, see Instance Types.

       -h/--local-hostname
              The local hostname of the instance.

       -o/--local-ipv4
              Public IP address if  launched  with  direct  addressing;  private  IP  address  if
              launched with public addressing.

       -k/--kernel-id
              The ID of the kernel launched with this instance, if applicable.

       -z/--availability-zone
              The availability zone in which the instance launched. Same as placement

       -c/--product-codes
              Product codes associated with this instance.

       -p/--public-hostname
              The public hostname of the instance.

       -v/--public-ipv4
              NATted public IP Address

       -u/--public-keys
              Public keys. Only available if supplied at instance launch time

       -r/--ramdisk-id
              The ID of the RAM disk launched with this instance, if applicable.

       -e/--reservation-id
              ID of the reservation.

       -s/--security-groups
              Names  of  the  security  groups  the  instance  is  launched in. Only available if
              supplied at instance launch time

       -d/--user-data
              User-supplied data.Only available if supplied at instance launch time.

       -h, --help
              Show summary of options.

NAME

SYNOPSIS

DESCRIPTION

OPTIONS

SEE ALSO