open-vault/website/source/api/auth/kubernetes/index.html.md

layout	page_title	sidebar_title	sidebar_current	description
api	Kubernetes - Auth Methods - HTTP API	Kubernetes	api-http-auth-kubernetes	This is the API documentation for the Vault Kubernetes auth method plugin.

Kubernetes Auth Method (API)

This is the API documentation for the Vault Kubernetes auth method plugin. To learn more about the usage and operation, see the Vault Kubernetes auth method.

This documentation assumes the Kubernetes method is mounted at the /auth/kubernetes path in Vault. Since it is possible to enable auth methods at any location, please update your API calls accordingly.

Configure Method

The Kubernetes auth method validates service account JWTs and verifies their existence with the Kubernetes TokenReview API. This endpoint configures the public key used to validate the JWT signature and the necessary information to access the Kubernetes API.

Method	Path	Produces
POST	/auth/kubernetes/config	204 (empty body)

Parameters

• kubernetes_host (string: <required>) - Host must be a host string, a host:port pair, or a URL to the base of the Kubernetes API server.
• kubernetes_ca_cert (string: "") - PEM encoded CA cert for use by the TLS client used to talk with the Kubernetes API.
• token_reviewer_jwt (string: "") - A service account JWT used to access the TokenReview API to validate other JWTs during login. If not set the JWT used for login will be used to access the API.
• pem_keys (array: []) - Optional list of PEM-formated public keys or certificates used to verify the signatures of Kubernetes service account JWTs. If a certificate is given, its public key will be extracted. Not every installation of Kubernetes exposes these keys.

Sample Payload

{
  "kubernetes_host": "https://192.168.99.100:8443",
  "kubernetes_ca_cert": "-----BEGIN CERTIFICATE-----.....-----END CERTIFICATE-----",
  "pem_keys": "-----BEGIN CERTIFICATE-----\n.....\n-----END CERTIFICATE-----"
}

Sample Request

$ curl \
    --header "X-Vault-Token: ..." \
    --request POST \
    --data @payload.json \
    http://127.0.0.1:8200/v1/auth/kubernetes/config

Read Config

Returns the previously configured config, including credentials.

Method	Path	Produces
GET	/auth/kubernetes/config	200 application/json

Sample Request

$ curl \
    --header "X-Vault-Token: ..." \
    http://127.0.0.1:8200/v1/auth/kubernetes/config

Sample Response

{
  "data":{
    "kubernetes_host": "https://192.168.99.100:8443",
    "kubernetes_ca_cert": "-----BEGIN CERTIFICATE-----.....-----END CERTIFICATE-----",
    "pem_keys": ["-----BEGIN CERTIFICATE-----.....", .....]
  }
}

Create Role

Registers a role in the auth method. Role types have specific entities that can perform login operations against this endpoint. Constraints specific to the role type must be set on the role. These are applied to the authenticated entities attempting to login.

Method	Path	Produces
POST	/auth/kubernetes/role/:name	204 (empty body)

Parameters

• name (string: <required>) - Name of the role.
• bound_service_account_names (array: <required>) - List of service account names able to access this role. If set to "*" all names are allowed, both this and bound_service_account_namespaces can not be "*".
• bound_service_account_namespaces (array: <required>) - List of namespaces allowed to access this role. If set to "*" all namespaces are allowed, both this and bound_service_account_names can not be set to "*".
• ttl (string: "") - The TTL period of tokens issued using this role in seconds.
• max_ttl (string: "") - The maximum allowed lifetime of tokens issued in seconds using this role.
• period (string: "") - If set, indicates that the token generated using this role should never expire. The token should be renewed within the duration specified by this value. At each renewal, the token's TTL will be set to the value of this parameter.
• policies (array: []) - Policies to be set on tokens issued using this role.

Sample Payload

{
  "bound_service_account_names": "vault-auth",
  "bound_service_account_namespaces": "default",
  "policies": [
    "dev",
    "prod"
  ],
  "max_ttl": 1800000,
}

Sample Request

$ curl \
    --header "X-Vault-Token: ..." \
    --request POST \
    --data @payload.json \
    http://127.0.0.1:8200/v1/auth/kubernetes/role/dev-role

Read Role

Returns the previously registered role configuration.

Method	Path	Produces
GET	/auth/kubernetes/role/:name	200 application/json

Parameters

• name (string: <required>) - Name of the role.

Sample Request

$ curl \
    --header "X-Vault-Token: ..." \
    http://127.0.0.1:8200/v1/auth/kubernetes/role/dev-role

Sample Response

{
  "data":{
    "bound_service_account_names": "vault-auth",
    "bound_service_account_namespaces": "default",
    "max_ttl": 1800000,
    "ttl":0,
    "period": 0,
    "policies":[
      "dev",
      "prod"
    ]
  }
}

List Roles

Lists all the roles that are registered with the auth method.

Method	Path	Produces
LIST	/auth/kubernetes/role	200 application/json
GET	/auth/kubernetes/role?list=true	200 application/json

Sample Request

$ curl \
    --header "X-Vault-Token: ..." \
    --request LIST \
    http://127.0.0.1:8200/v1/auth/kubernetes/role

Sample Response

{
  "data": {
    "keys": [
      "dev-role",
      "prod-role"
    ]
  }
}

Delete Role

Deletes the previously registered role.

Method	Path	Produces
DELETE	/auth/kubernetes/role/:role	204 (empty body)

Parameters

• role (string: <required>) - Name of the role.

Sample Request

$ curl \
    --header "X-Vault-Token: ..." \
    --request DELETE \
    http://127.0.0.1:8200/v1/auth/kubernetes/role/dev-role

Login

Fetch a token. This endpoint takes a signed JSON Web Token (JWT) and a role name for some entity. It verifies the JWT signature to authenticate that entity and then authorizes the entity for the given role.

Method	Path	Produces
POST	/auth/kubernetes/login	200 application/json

Sample Payload

• role (string: <required>) - Name of the role against which the login is being attempted.
• jwt (string: <required>) - Signed JSON Web Token (JWT) for authenticating a service account.

Sample Payload

{
  "role": "dev-role",
  "jwt": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9..."
}

Sample Request

$ curl \
    --request POST \
    --data @payload.json \
    http://127.0.0.1:8200/v1/auth/kubernetes/login

Sample Response

{
  "auth": {
    "client_token": "62b858f9-529c-6b26-e0b8-0457b6aacdb4",
    "accessor": "afa306d0-be3d-c8d2-b0d7-2676e1c0d9b4",
    "policies": [
      "default"
    ],
    "metadata": {
      "role": "test",
      "service_account_name": "vault-auth",
      "service_account_namespace": "default",
      "service_account_secret_name": "vault-auth-token-pd21c",
      "service_account_uid": "aa9aa8ff-98d0-11e7-9bb7-0800276d99bf"
    },
    "lease_duration": 2764800,
    "renewable": true
  }
}