MySQL/MariaDB database plugin HTTP API

The MySQL 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 MySQL database.

Configure connection

In addition to the parameters defined by the Database Backend, this plugin has a number of parameters to further configure a connection.

Parameters

• connection_url (string: <required>) - Specifies the MySQL 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.

• auth_type (string: "") - If set to gcp_iam, will enable IAM authentication to a Google CloudSQL instance. For more information on authenticating to CloudSQL via IAM, please refer to Google's official documentation here..

• service_account_json (string: "") - JSON encoded credentials for a GCP Service Account to use for IAM authentication. Requires auth_type to be gcp_iam.

• tls_certificate_key (string: "") - x509 certificate for connecting to the database. This must be a PEM encoded version of the private key and the certificate combined.

• tls_ca (string: "") - x509 CA file for validating the certificate presented by the MySQL server. Must be PEM encoded.

• tls_server_name (string: "") - Specifies the subject alternative name should be present in the server's certificate.

• tls_skip_verify (boolean: false) - When set to true, disables the server certificate verification. Setting this to true is not recommended for production.

• username_template (string) - Template describing how dynamic usernames are generated.

• disable_escaping (boolean: false) - Turns off the escaping of special characters inside of the username and password fields. See the databases secrets engine docs for more information. Defaults to false.

Default Username Templates:

{{ printf "v-%s-%s-%s-%s" (.DisplayName | truncate 10) (.RoleName | truncate 10) (random 20) (unix_time) | truncate 32 }}

{{ printf "v-%s-%s-%s" (.RoleName | truncate 4) (random 20) | truncate 16 }}

Sample payload

{
  "plugin_name": "mysql-database-plugin",
  "allowed_roles": "readonly",
  "connection_url": "{{username}}:{{password}}@tcp(127.0.0.1:3306)/",
  "max_open_connections": 5,
  "max_connection_lifetime": "5s",
  "username": "root",
  "password": "mysql"
}

Sample request

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

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}} and {{password}} values will be substituted. The generated password will be a random alphanumeric 20 character string.

• 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 a generic drop user statement.