HANA Database Plugin HTTP API

The HANA database plugin is one of the supported plugins for the database secrets engine. This plugin generates database credentials dynamically based on configured roles for the HANA database.

Configure Connection

In addition to the parameters defined by the database secrets engine, this plugin has a number of parameters to further configure a connection.

Parameters

• connection_url (string: <required>) - Specifies the HANA DSN. This field can be templated and supports passing the username and password parameters in the following format {{field_name}}. A templated connection URL is required when using root credential rotation.

• max_open_connections (int: 4) - Specifies the maximum number of open connections to the database.

• max_idle_connections (int: 0) - Specifies the maximum number of idle connections to the database. A zero uses the value of max_open_connections and a negative value disables idle connections. If larger than max_open_connections it will be reduced to be equal.

• max_connection_lifetime (string: "0s") - Specifies the maximum amount of time a connection may be reused. If ≤ 0s, connections are reused forever.

• username (string: "") - The root credential username used in the connection URL.

• password (string: "") - The root credential password used in the connection URL.

Sample Payload

{
  "plugin_name": "hana-database-plugin",
  "allowed_roles": "readonly",
  "connection_url": "hdb://{{username}}:{{password}}@localhost:1433",
  "max_open_connections": 5,
  "max_connection_lifetime": "5s",
  "username": "username",
  "password": "password"
}

Sample Request

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

Statements

Statements are configured during role creation and are used by the plugin to determine what is sent to the database on user creation, renewing, and revocation. For more information on configuring roles see the Role API in the database secrets engine docs.

Parameters

The following are the statements used by this plugin. If not mentioned in this list the plugin does not support that statement type.

• creation_statements (list: <required>) – Specifies the database statements executed to create and configure a user. Must be a semicolon-separated string, a base64-encoded semicolon-separated string, a serialized JSON string array, or a base64-encoded serialized JSON string array. The {{name}}, {{password}}, and {{expiration}} values will be substituted.

  • The expiration time will be HANA server time plus the role's default_ttl. If default_ttl is 0 or not set, a SQL HdbError 438 will be returned.

• revocation_statements (list: []) – Specifies the database statements to be executed to revoke a user. Must be a semicolon-separated string, a base64-encoded semicolon-separated string, a serialized JSON string array, or a base64-encoded serialized JSON string array. The {{name}} value will be substituted. If not provided, defaults to dropping the user only if they have no dependent objects.