AWS CLI Command Reference

[ aws . ssm ]

describe-parameters

Description

Get information about a parameter.

Request results are returned on a best-effort basis. If you specify MaxResults in the request, the response includes information up to the limit specified. The number of items returned, however, can be between zero and the value of MaxResults . If the service reaches an internal limit while processing the results, it stops the operation and returns the matching values up to that point and a NextToken . You can specify the NextToken in a subsequent call to get the next set of results.

Warning

If you change the KMS key alias for the KMS key used to encrypt a parameter, then you must also update the key alias the parameter uses to reference KMS. Otherwise, DescribeParameters retrieves whatever the original key alias was referencing.

See also: AWS API Documentation

See ‘aws help’ for descriptions of global parameters.

describe-parameters is a paginated operation. Multiple API calls may be issued in order to retrieve the entire data set of results. You can disable pagination by providing the --no-paginate argument. When using --output text and the --query argument on a paginated response, the --query argument must extract data from the results of the following query expressions: Parameters

Synopsis

  describe-parameters
[--filters <value>]
[--parameter-filters <value>]
[--cli-input-json | --cli-input-yaml]
[--starting-token <value>]
[--page-size <value>]
[--max-items <value>]
[--generate-cli-skeleton <value>]

Options

--filters (list)

This data type is deprecated. Instead, use ParameterFilters .

(structure)

This data type is deprecated. Instead, use ParameterStringFilter .

Key -> (string)

The name of the filter.

Values -> (list)

The filter values.

(string)

Shorthand Syntax:

Key=string,Values=string,string ...

JSON Syntax:

[
  {
    "Key": "Name"|"Type"|"KeyId",
    "Values": ["string", ...]
  }
  ...
]

--parameter-filters (list)

Filters to limit the request results.

(structure)

One or more filters. Use a filter to return a more specific list of results.

Key -> (string)

The name of the filter.

The ParameterStringFilter object is used by the DescribeParameters and GetParametersByPath API operations. However, not all of the pattern values listed for Key can be used with both operations.

For DescribeActions , all of the listed patterns are valid except Label .

For GetParametersByPath , the following patterns listed for Key aren’t valid: tag , DataType , Name , Path , and Tier .

For examples of Amazon Web Services CLI commands demonstrating valid parameter filter constructions, see Searching for Systems Manager parameters in the Amazon Web Services Systems Manager User Guide .

Option -> (string)

For all filters used with DescribeParameters , valid options include Equals and BeginsWith . The Name filter additionally supports the Contains option. (Exception: For filters using the key Path , valid options include Recursive and OneLevel .)

For filters used with GetParametersByPath , valid options include Equals and BeginsWith . (Exception: For filters using Label as the Key name, the only valid option is Equals .)

Values -> (list)

The value you want to search for.

(string)

Shorthand Syntax:

Key=string,Option=string,Values=string,string ...

JSON Syntax:

[
  {
    "Key": "string",
    "Option": "string",
    "Values": ["string", ...]
  }
  ...
]

--cli-input-json | --cli-input-yaml (string) Reads arguments from the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, those 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. This may not be specified along with --cli-input-yaml.

--starting-token (string)

A token to specify where to start paginating. This is the NextToken from a previously truncated response.

For usage examples, see Pagination in the AWS Command Line Interface User Guide .

--page-size (integer)

The size of each page to get in the AWS service call. This does not affect the number of items returned in the command’s output. Setting a smaller page size results in more calls to the AWS service, retrieving fewer items in each call. This can help prevent the AWS service calls from timing out.

For usage examples, see Pagination in the AWS Command Line Interface User Guide .

--max-items (integer)

The total number of items to return in the command’s output. If the total number of items available is more than the value specified, a NextToken is provided in the command’s output. To resume pagination, provide the NextToken value in the starting-token argument of a subsequent command. Do not use the NextToken response element directly outside of the AWS CLI.

For usage examples, see Pagination in the AWS Command Line Interface User Guide .

--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. Similarly, if provided yaml-input it will print a sample input YAML that can be used with --cli-input-yaml. 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

Example 1: To list all parameters

The following describe-parameters example lists all parameters in the current AWS account and Region.

aws ssm describe-parameters

Output:

{
    "Parameters": [
        {
            "Name": "MySecureStringParameter",
            "Type": "SecureString",
            "KeyId": "alias/aws/ssm",
            "LastModifiedDate": 1582155479.205,
            "LastModifiedUser": "arn:aws:sts::111222333444:assumed-role/Admin/Richard-Roe-Managed",
            "Description": "This is a SecureString parameter",
            "Version": 2,
            "Tier": "Advanced",
            "Policies": [
                {
                    "PolicyText": "{\"Type\":\"Expiration\",\"Version\":\"1.0\",\"Attributes\":{\"Timestamp\":\"2020-07-07T22:30:00Z\"}}",
                    "PolicyType": "Expiration",
                    "PolicyStatus": "Pending"
                },
                {
                    "PolicyText": "{\"Type\":\"ExpirationNotification\",\"Version\":\"1.0\",\"Attributes\":{\"Before\":\"12\",\"Unit\":\"Hours\"}}",
                    "PolicyType": "ExpirationNotification",
                    "PolicyStatus": "Pending"
                }
            ]
        },
        {
            "Name": "MyStringListParameter",
            "Type": "StringList",
            "LastModifiedDate": 1582154764.222,
            "LastModifiedUser": "arn:aws:iam::111222333444:user/Mary-Major",
            "Description": "This is a StringList parameter",
            "Version": 1,
            "Tier": "Standard",
            "Policies": []
        },
        {
            "Name": "MyStringParameter",
            "Type": "String",
            "LastModifiedDate": 1582154711.976,
            "LastModifiedUser": "arn:aws:iam::111222333444:user/Alejandro-Rosalez",
            "Description": "This is a String parameter",
            "Version": 1,
            "Tier": "Standard",
            "Policies": []
        },
        {
            "Name": "latestAmi",
            "Type": "String",
            "LastModifiedDate": 1580862415.521,
            "LastModifiedUser": "arn:aws:sts::111222333444:assumed-role/lambda-ssm-role/Automation-UpdateSSM-Param",
            "Version": 3,
            "Tier": "Standard",
            "Policies": []
        }
    ]
}

Example 2: To list all parameters matching specific metadata

This describe-parameters example lists all parameters matching a filter.

aws ssm describe-parameters

–filters “Key=Type,Values=StringList”

Output:

{
    "Parameters": [
        {
            "Name": "MyStringListParameter",
            "Type": "StringList",
            "LastModifiedDate": 1582154764.222,
            "LastModifiedUser": "arn:aws:iam::111222333444:user/Mary-Major",
            "Description": "This is a StringList parameter",
            "Version": 1,
            "Tier": "Standard",
            "Policies": []
        }
    ]
}

For more information, see Searching for Systems Manager Parameters in the AWS Systems Manager User Guide.

Output

Parameters -> (list)

Parameters returned by the request.

(structure)

Metadata includes information like the ARN of the last user and the date/time the parameter was last used.

Name -> (string)

The parameter name.

Type -> (string)

The type of parameter. Valid parameter types include the following: String , StringList , and SecureString .

KeyId -> (string)

The ID of the query key used for this parameter.

LastModifiedDate -> (timestamp)

Date the parameter was last changed or updated.

LastModifiedUser -> (string)

Amazon Resource Name (ARN) of the Amazon Web Services user who last changed the parameter.

Description -> (string)

Description of the parameter actions.

AllowedPattern -> (string)

A parameter name can include only the following letters and symbols.

a-zA-Z0-9_.-

Version -> (long)

The parameter version.

Tier -> (string)

The parameter tier.

Policies -> (list)

A list of policies associated with a parameter.

(structure)

One or more policies assigned to a parameter.

PolicyText -> (string)

The JSON text of the policy.

PolicyType -> (string)

The type of policy. Parameter Store, a capablility of Amazon Web Services Systems Manager, supports the following policy types: Expiration, ExpirationNotification, and NoChangeNotification.

PolicyStatus -> (string)

The status of the policy. Policies report the following statuses: Pending (the policy hasn’t been enforced or applied yet), Finished (the policy was applied), Failed (the policy wasn’t applied), or InProgress (the policy is being applied now).

DataType -> (string)

The data type of the parameter, such as text or aws:ec2:image . The default is text .

NextToken -> (string)

The token to use when requesting the next set of items.

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