Use DescribeMaintenanceWindowTargets with a CLI

Example 1: To list all targets for a Maintenance Window

The following describe-maintenance-window-targets example lists all of the targets for a maintenance window.

aws ssm describe-maintenance-window-targets \
    --window-id "mw-06cf17cbefEXAMPLE"

Output:

{
    "Targets": [
        {
            "ResourceType": "INSTANCE",
            "OwnerInformation": "Single instance",
            "WindowId": "mw-06cf17cbefEXAMPLE",
            "Targets": [
                {
                    "Values": [
                        "i-0000293ffdEXAMPLE"
                    ],
                    "Key": "InstanceIds"
                }
            ],
            "WindowTargetId": "350d44e6-28cc-44e2-951f-4b2c9EXAMPLE"
        },
        {
            "ResourceType": "INSTANCE",
            "OwnerInformation": "Two instances in a list",
            "WindowId": "mw-06cf17cbefEXAMPLE",
            "Targets": [
                {
                    "Values": [
                        "i-0000293ffdEXAMPLE",
                        "i-0cb2b964d3EXAMPLE"
                    ],
                    "Key": "InstanceIds"
                }
            ],
            "WindowTargetId": "e078a987-2866-47be-bedd-d9cf4EXAMPLE"
        }
    ]
}

Example 2: To list all targets for a maintenance window matching a specific owner information value

This describe-maintenance-window-targets example lists all of the targets for a maintenance window with a specific value.

aws ssm describe-maintenance-window-targets \
    --window-id "mw-0ecb1226ddEXAMPLE" \
    --filters "Key=OwnerInformation,Values=CostCenter1"

Output:

{
    "Targets": [
        {
            "WindowId": "mw-0ecb1226ddEXAMPLE",
            "WindowTargetId": "da89dcc3-7f9c-481d-ba2b-edcb7d0057f9",
            "ResourceType": "INSTANCE",
            "Targets": [
                {
                    "Key": "tag:Environment",
                    "Values": [
                        "Prod"
                    ]
                }
            ],
            "OwnerInformation": "CostCenter1",
            "Name": "ProdTarget1"
        }
    ]
}

For more information, see View Information About Maintenance Windows (AWS CLI) in the AWS Systems Manager User Guide.

Example 1: This example lists all of the targets for a maintenance window.

Get-SSMMaintenanceWindowTarget -WindowId "mw-06cf17cbefcb4bf4f"

Output:

OwnerInformation : Single instance
ResourceType     : INSTANCE
Targets          : {InstanceIds}
WindowId         : mw-06cf17cbefcb4bf4f
WindowTargetId   : 350d44e6-28cc-44e2-951f-4b2c985838f6

OwnerInformation : Two instances in a list
ResourceType     : INSTANCE
Targets          : {InstanceIds}
WindowId         : mw-06cf17cbefcb4bf4f
WindowTargetId   : e078a987-2866-47be-bedd-d9cf49177d3a