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[ aws . ec2 ]

describe-hosts

Description

Describes one or more of your Dedicated Hosts.

The results describe only the Dedicated Hosts in the region you're currently using. All listed instances consume capacity on your Dedicated Host. Dedicated Hosts that have recently been released are listed with the state released .

See also: AWS API Documentation

See 'aws help' for descriptions of global parameters.

Synopsis

  describe-hosts
[--filter <value>]
[--host-ids <value>]
[--max-results <value>]
[--next-token <value>]
[--cli-input-json <value>]
[--generate-cli-skeleton <value>]

Options

--filter (list)

One or more filters.

  • auto-placement - Whether auto-placement is enabled or disabled (on | off ).
  • availability-zone - The Availability Zone of the host.
  • client-token - The idempotency token that you provided when you allocated the host.
  • host-reservation-id - The ID of the reservation assigned to this host.
  • instance-type - The instance type size that the Dedicated Host is configured to support.
  • state - The allocation state of the Dedicated Host (available | under-assessment | permanent-failure | released | released-permanent-failure ).
  • tag-key - The key of a tag assigned to the resource. Use this filter to find all resources assigned a tag with a specific key, regardless of the tag value.

Shorthand Syntax:

Name=string,Values=string,string ...

JSON Syntax:

[
  {
    "Name": "string",
    "Values": ["string", ...]
  }
  ...
]

--host-ids (list)

The IDs of the Dedicated Hosts. The IDs are used for targeted instance launches.

Syntax:

"string" "string" ...

--max-results (integer)

The maximum number of results to return for the request in a single page. The remaining results can be seen by sending another request with the returned nextToken value. This value can be between 5 and 500. If maxResults is given a larger value than 500, you receive an error. You cannot specify this parameter and the host IDs parameter in the same request.

--next-token (string)

The token to retrieve the next page of results.

--cli-input-json (string) Performs service operation based on the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, the CLI values will override the JSON-provided values. It is not possible to pass arbitrary binary values using a JSON-provided value as the string will be taken literally.

--generate-cli-skeleton (string) Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for --cli-input-json. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command.

See 'aws help' for descriptions of global parameters.

Examples

To describe Dedicated hosts in your account and generate a machine-readable list

To output a list of Dedicated host IDs in JSON (comma separated).

Command:

aws ec2 describe-hosts --query 'Hosts[].HostId' --output json

Output:

[
"h-085664df5899941c",
"h-056c1b0724170dc38"
]

To output a list of Dedicated host IDs in plaintext (comma separated).

Command:

aws ec2 describe-hosts --query 'Hosts[].HostId' --output text

Output:: h-085664df5899941c h-056c1b0724170dc38

To describe available Dedicated hosts in your account

Command:

aws ec2 describe-hosts --filter "Name=state,Values=available"

Output:

{
  "Hosts":  [
      {
          "HostId": "h-085664df5899941c"
          "HostProperties: {
              "Cores": 20,
               "Sockets": 2,
                "InstanceType": "m3.medium".
                "TotalVCpus": 32
           },
           "Instances": [],
            "State": "available",
            "AvailabilityZone": "us-east-1b",
            "AvailableCapacity": {
                "AvailableInstanceCapacity": [
                    {
                          "AvailableCapacity": 32,
                          "InstanceType": "m3.medium",
                          "TotalCapacity": 32
                    }
                 ],
                 "AvailableVCpus": 32
            },
            "AutoPlacement": "off"
     }
  ]
}

Output

Hosts -> (list)

Information about the Dedicated Hosts.

(structure)

Describes the properties of the Dedicated Host.

AutoPlacement -> (string)

Whether auto-placement is on or off.

AvailabilityZone -> (string)

The Availability Zone of the Dedicated Host.

AvailableCapacity -> (structure)

The number of new instances that can be launched onto the Dedicated Host.

AvailableInstanceCapacity -> (list)

The total number of instances supported by the Dedicated Host.

(structure)

Information about the instance type that the Dedicated Host supports.

AvailableCapacity -> (integer)

The number of instances that can still be launched onto the Dedicated Host.

InstanceType -> (string)

The instance type size supported by the Dedicated Host.

TotalCapacity -> (integer)

The total number of instances that can be launched onto the Dedicated Host.

AvailableVCpus -> (integer)

The number of vCPUs available on the Dedicated Host.

ClientToken -> (string)

Unique, case-sensitive identifier that you provide to ensure idempotency of the request. For more information, see How to Ensure Idempotency in the Amazon Elastic Compute Cloud User Guide .

HostId -> (string)

The ID of the Dedicated Host.

HostProperties -> (structure)

The hardware specifications of the Dedicated Host.

Cores -> (integer)

The number of cores on the Dedicated Host.

InstanceType -> (string)

The instance type size that the Dedicated Host supports (for example, m3.medium ).

Sockets -> (integer)

The number of sockets on the Dedicated Host.

TotalVCpus -> (integer)

The number of vCPUs on the Dedicated Host.

HostReservationId -> (string)

The reservation ID of the Dedicated Host. This returns a null response if the Dedicated Host doesn't have an associated reservation.

Instances -> (list)

The IDs and instance type that are currently running on the Dedicated Host.

(structure)

Describes an instance running on a Dedicated Host.

InstanceId -> (string)

the IDs of instances that are running on the Dedicated Host.

InstanceType -> (string)

The instance type size (for example, m3.medium ) of the running instance.

State -> (string)

The Dedicated Host's state.

AllocationTime -> (timestamp)

The time that the Dedicated Host was allocated.

ReleaseTime -> (timestamp)

The time that the Dedicated Host was released.

Tags -> (list)

Any tags assigned to the Dedicated Host.

(structure)

Describes a tag.

Key -> (string)

The key of the tag.

Constraints: Tag keys are case-sensitive and accept a maximum of 127 Unicode characters. May not begin with aws: .

Value -> (string)

The value of the tag.

Constraints: Tag values are case-sensitive and accept a maximum of 255 Unicode characters.

NextToken -> (string)

The token to use to retrieve the next page of results. This value is null when there are no more results to return.