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Centro de ayuda> Bare Metal Server> Guía del usuario> Instancia> Datos de usuario y metadatos> Recuperación de metadatos
Actualización más reciente 2023-03-20 GMT+08:00
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Recuperación de metadatos

Presentación

Los metadatos de BMS incluyen la información básica de BMS en la plataforma en la nube, tal como el ID de BMS, el nombre de host y la información de red. Los metadatos de BMS se pueden recuperar utilizando las API compatibles de OpenStack y EC2 que aparecen en Tabla 1.

Tabla 1 Tipos de metadatos de BMS

Tipo de metadatos

Elemento de metadatos

Descripción

Tipo de OpenStack

/meta_data.json

Esta interfaz se utiliza para consultar metadatos de BMS.

Para ver los campos de clave de los metadatos de BMS, consulte Tabla 2.

/password

Esta interfaz se utiliza para consultar la contraseña del BMS.

Si se selecciona un par de claves durante la creación de un BMS de Windows, Cloudbase-Init se utiliza para guardar la contraseña de texto cifrado cuando se inicializa el BMS.

/user_data

Esta interfaz se utiliza para consultar datos de usuario de BMS.

Estos metadatos le permiten especificar secuencias de comandos y archivos de configuración para inicializar los BMS. Para obtener más información, véase Inyección de datos de usuario.

Para los BMS de Linux autenticados con contraseña, guarde el script de inyección de contraseña.

/network_data.json

Esta interfaz se utiliza para consultar información de red de un BMS.

/securitykey

Esta interfaz se utiliza para obtener credenciales de seguridad temporales: ID de clave de acceso (AK) y clave de acceso secreta (SK).

Antes de obtener la AK/SK temporal en un BMS, debe crear una delegación para BMS en IAM y asignar los permisos de recursos necesarios a BMS.

Tipo de EC2

/meta-data/hostname

This interface is used to query the host name of a BMS.

To remove the suffix .novalocal from a BMS, see:

Is the BMS Host Name with Suffix novalocal Normal?

/meta-data/instance-type

This interface is used to query the flavor name of a BMS.

/meta-data/local-ipv4

This interface is used to query the fixed IP address of a BMS.

If there are multiple NICs, only the IP address of the primary NIC is displayed.

/meta-data/placement/availability-zone

This interface is used to query AZ information about a BMS.

/meta-data/public-ipv4

This interface is used to query the EIP of a BMS.

If there are multiple NICs, only the EIP of the primary NIC is displayed.

/meta-data/public-keys/0/openssh-key

This interface is used to query the public key of a BMS.

/user-data

This interface is used to query BMS user data.

/meta-data/security-groups

This interface is used to query the name of the security group of the BMS.
Tabla 2 Metadata key fields

Parameter

Type

Description

uuid

String

Specifies the BMS ID.

availability_zone

String

Specifies the AZ where the BMS is located.

meta

Dict

Specifies the metadata information, including the image name, image ID, and VPC ID.

hostname

String

Specifies the hostname of the BMS.

To remove the suffix .novalocal from a BMS, see:

Is the BMS Host Name with Suffix novalocal Normal?

vpc_id

String

Specifies the ID of the VPC where the BMS is located.

The following describes the URI and methods of using the supported BMS metadata.

Prerequisites

  • You have logged in to the BMS.
  • Security group rules in the outbound direction meet the following requirements:
    • Protocol: TCP
    • Port Range: 80
    • Remote End: 169.254.0.0/16

    If you use the default security group rules in the outbound direction, the preceding requirements are met, and the metadata can be accessed. The default outbound security group rule is as follows:

    • Protocol: Any
    • Port Range: Any
    • Remote End: 0.0.0.0/16

Metadata (OpenStack Metadata API)

This interface is used to query BMS metadata.

  • URI

    /169.254.169.254/openstack/latest/meta_data.json

  • Method

    Supports GET requests.

  • Example

    The following describes how to use the cURL tool to query the BMS metadata:

    curl http://169.254.169.254/openstack/latest/meta_data.json

    {
    "random_seed": "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",
    "uuid": "ca9e8b7c-f2be-4b6d-a639-f10b4d994d04",
    "availability_zone": "lt-test-1c",
    "hostname": "bms-ddd4-l00349281.novalocal",
    "launch_index": 0,
    "meta": {
        "metering.image_id": "3a64bd37-955e-40cd-ab9e-129db56bc05d",
        "metering.imagetype": "gold",
        "metering.resourcespeccode": "physical.s3.small",
        "metering.cloudServiceType": "service.type.ec2",
        "image_name": "CentOS 7.6 64bit",
        "os_bit": "64",
        "vpc_id": "3b6c201f-aeb3-4bce-b841-64756e66cb49",
        "metering.resourcetype": "1",
        "cascaded.instance_extrainfo": "pcibridge:2",
        "os_type": "Linux",
        "charging_mode": "0"
    },
    "project_id": "6e8b0c94265645f39c5abbe63c4113c6",
    "name": "ecs-ddd4-l00349281"
}

User Data (OpenStack Metadata API)

This interface is used to query BMS user data. The value is configured when you create a BMS. It cannot be changed after the configuration.

  • URI

    /169.254.169.254/openstack/latest/user_data

  • Method

    Supports GET requests.

  • Example

    curl http://169.254.169.254/openstack/latest/user_data

    ICAgICAgDQoiQSBjbG91ZCBkb2VzIG5vdCBrbm93IHdoeSBpdCBtb3ZlcyBpbiBqdXN0IHN1Y2ggYSBkaXJlY3Rpb24gYW5kIGF0IHN1Y2ggYSBzcGVlZC4uLkl0IGZlZWxzIGFuIGltcHVsc2lvbi4uLnRoaXMgaXMgdGhlIHBsYWNlIHRvIGdvIG5vdy4gQnV0IHRoZSBza3kga25vd3MgdGhlIHJlYXNvbnMgYW5kIHRoZSBwYXR0ZXJucyBiZWhpbmQgYWxsIGNsb3VkcywgYW5kIHlvdSB3aWxsIGtub3csIHRvbywgd2hlbiB5b3UgbGlmdCB5b3Vyc2VsZiBoaWdoIGVub3VnaCB0byBzZWUgYmV5b25kIGhvcml6b25zLiINCg0KLVJpY2hhcmQgQmFjaA==
    If user data is not injected during BMS creation, the query result is 404.
    Figura 1 404 Not Found

Network Data (OpenStack Metadata API)

This interface is used to query network information of a BMS.

  • URI

    /openstack/latest/network_data.json

  • Method

    Supports GET requests.

  • Example

    curl http://169.254.169.254/openstack/latest/network_data.json

    {
    "services": [{
        "type": "dns",
        "address": "100.125.1.250"
    },
    {
        "type": "dns",
        "address": "100.125.21.250"
    }],
    "networks": [{
        "network_id": "67dc10ce-441f-4592-9a80-cc709f6436e7",
        "type": "ipv4_dhcp",
        "link": "tap68a9272d-71",
        "id": "network0"
    }],
    "links": [{
        "type": "cascading",
        "vif_id": "68a9272d-7152-4ae7-a138-3ef53af669e7",
        "ethernet_mac_address": "fa:16:3e:f7:c1:47",
        "id": "tap68a9272d-71",
        "mtu": null
    }]
}

Security Key (OpenStack Metadata API)

This interface is used to obtain temporary security credentials: Access Key ID (AK) and Secret Access Key (SK).

  • To obtain temporary AK/SK on a BMS, you need to create an agency for BMS on IAM and assign required resource permissions to BMS. For details, see Identity and Access Management User Guide.
  • The temporary AK/SK pair expires an hour later but is updated 10 minutes ahead of the expiration time. During the 10 minutes, both the new and old temporary AK/SK pairs can be used.
  • When using temporary AK/SK, add 'X-Security-Token':securitytoken in the message header. securitytoken is the value returned when a call is made to the API.
  • URI

    /openstack/latest/securitykey

  • Method

    Supports GET requests.

  • Example

    curl http://169.254.169.254/openstack/latest/securitykey

User Data (EC2 Compatible API)

This interface is used to query BMS user data. The value is configured when you create a BMS. It cannot be changed after the configuration.

  • URI

    /169.254.169.254/latest/user-data

  • Method

    Supports GET requests.

  • Example

    curl http://169.254.169.254/latest/user-data

    ICAgICAgDQoiQSBjbG91ZCBkb2VzIG5vdCBrbm93IHdoeSBpdCBtb3ZlcyBpbiBqdXN0IHN1Y2ggYSBkaXJlY3Rpb24gYW5kIGF0IHN1Y2ggYSBzcGVlZC4uLkl0IGZlZWxzIGFuIGltcHVsc2lvbi4uLnRoaXMgaXMgdGhlIHBsYWNlIHRvIGdvIG5vdy4gQnV0IHRoZSBza3kga25vd3MgdGhlIHJlYXNvbnMgYW5kIHRoZSBwYXR0ZXJucyBiZWhpbmQgYWxsIGNsb3VkcywgYW5kIHlvdSB3aWxsIGtub3csIHRvbywgd2hlbiB5b3UgbGlmdCB5b3Vyc2VsZiBoaWdoIGVub3VnaCB0byBzZWUgYmV5b25kIGhvcml6b25zLiINCg0KLVJpY2hhcmQgQmFjaA==

Hostname (EC2 Compatible API)

This interface is used to query the name of the host accommodating a BMS. The .novalocal suffix will be added later.

  • URI

    /169.254.169.254/latest/meta-data/hostname

  • Method

    Supports GET requests.

  • Example

    curl http://169.254.169.254/latest/meta-data/hostname

    bms-test.novalocal

Instance Type (EC2 Compatible API)

This interface is used to query the flavor name of a BMS.

  • URI

    /169.254.169.254/latest/meta-data/instance-type

  • Method

    Supports GET requests.

  • Example

    curl http://169.254.169.254/latest/meta-data/instance-type

    physical.o2.medium

Local IPv4 (EC2 Compatible API)

This interface is used to query the fixed IP address of a BMS. If there are multiple NICs, only the IP address of the primary NIC is displayed.

  • URI

    /169.254.169.254/latest/meta-data/local-ipv4

  • Method

    Supports GET requests.

  • Example

    curl http://169.254.169.254/latest/meta-data/local-ipv4

    192.1.1.2

Availability Zone (EC2 Compatible API)

This interface is used to query AZ information about a BMS.

  • URI

    /169.254.169.254/latest/meta-data/placement/availability-zone

  • Method

    Supports GET requests.

  • Example

    curl http://169.254.169.254/latest/meta-data/placement/availability-zone

    az1.dc1

Public IPv4 (EC2 Compatible API)

This interface is used to query the EIP of a BMS. If there are multiple NICs, only the EIP of the primary NIC is displayed.

  • URI

    /169.254.169.254/latest/meta-data/public-ipv4

  • Method

    Supports GET requests.

  • Example

    curl http://169.254.169.254/latest/meta-data/public-ipv4

    46.1.1.2

Public Keys (EC2 Compatible API)

This interface is used to query the public key of a BMS.

  • URI

    /169.254.169.254/latest/meta-data/public-keys/0/openssh-key

  • Method

    Supports GET requests.

  • Example

    curl http://169.254.169.254/latest/meta-data/public-keys/0/openssh-key

    ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDI5Fw5k8Fgzajn1zJwLoV3+wMP+6CyvsSiIc/hioggSnYu/AD0Yqm8vVO0kWlun1rFbdO+QUZKyVr/OPUjQSw4SRh4qsTKf/+eFoWTjplFvd1WCBZzS/WRenxIwR00KkczHSJro763+wYcwKieb4eKRxaQoQvoFgVjLBULXAjH4eKoKTVNtMXAvPP9aMy2SLgsJNtMb9ArfziAiblQynq7UIfLnN3VclzPeiWrqtzjyOp6CPUXnL0lVPTvbLe8sUteBsJZwlL6K4i+Y0lf3ryqnmQgC21yW4Dzu+kwk8FVT2MgWkCwiZd8gQ/+uJzrJFyMfUOBIklOBfuUENIJUhAB Generated-by-Nova