Datasource Authentication

Scenarios

Datasource authentication is used to manage authentication information for accessing CSS and MRS security environments and encrypt passwords for accessing DWS, RDS, DDS, and DCS data sources.

When creating a CSS cluster in the security mode, you need to specify the username and password. A certificate is available for downloading the security CSS cluster. To access the security CSS cluster, the username, password, and certificate need to be stored in DLI. The username, password, and certificate are the datasource authentication information for accessing the CSS cluster.
When creating an MRS cluster in the security mode, you need to enable the kerberos authentication. Download the authentication credential, which contains the krb5.conf and user.keytab files. When connecting DLI to an MRS cluster, you can store the two files in DLI. The two files are the datasource authentication information for accessing the MRS cluster.
To create a Kafka cluster, you need to enable SSL access. You can configure this function on the Service Configuration page of MRS and Kafka, or set up an open-source Kafka cluster and modify the configuration file to enable this function.
Through datasource password authentication, the passwords for accessing DWS, RDS, DDS, and DCS data sources can be encrypted for storage.

Creating a Datasource Authentication

Create a data source to be accessed.

If a cluster is available, you do not need to apply for one.
- Create a CSS cluster in the security mode: Select 6.5.4 or a later version for Cluster Version and enable the Security Mode.
- Create an MRS cluster in the security mode: On the MRS management console, apply for a cluster, select Custom Config, set Cluster Version to MRS 2.1.0 or later, and enable Kerberos Authentication.
- Creating a Kafka cluster: You can configure the Kafka cluster on the Service Configuration page of MRS and Kafka. For details about how to configure SSL on MRS, see Security Configuration in the MapReduce Service User Guide.
- Creating a DWS cluster: Apply for a data warehouse cluster from DWS. For details, see the Data Warehouse Service Management Guide.
- Creating an RDS data source: Apply for a database instance in the RDS service. For details, see the Relational Database Service Getting Started.
- Creating a DCS data source: Apply for a DCS instance in DCS. For details, see the Distributed Cache Service User Guide.
- Creating a DDS data source: Apply for a DDS DB instance. For details, see Document Database Service Getting Started.
Download the authentication credential. Skip this step when you access DWS, RDS, DCS, or DDS data sources.
- CSS security cluster: On the Cluster Management page, click the cluster name. On the Basic Information page that is displayed, find the Security Mode and download the certificate of the CSS security cluster.
- MRS security cluster: On the cluster list page, click the cluster name. On the displayed cluster information page, download the authentication credential. After downloading the authentication credential, decompress it to obtain the krb5.conf and user.keytab files.
Upload the authentication credential. Skip this step when you access DWS, RDS, DCS, or DDS data sources.
Upload the obtained authentication credential file to the user-defined OBS bucket.
On the DLI management console, click Datasource Connection.

On the Datasource Authentication tab page, click Create to create an authentication information.

CSS

**Table 1** Parameters
Parameter	Description
Authentication Certificate	Name of the datasource authentication information to be created. The name can contain only digits, letters, and underscores (_), but cannot contain only digits or start with an underscore (_). The length of the database name cannot exceed 128 characters. It is recommended that the name contain the CSS security cluster name to distinguish security authentication information of different clusters.
Type	Select CSS.
Username	Username for logging in to the security cluster.
Password	The password of the security cluster
Certificate Path	The OBS path for uploading the security certificate

MRS

**Table 2** Description
Parameter	Description
Authentication Certificate	Name of the datasource authentication information to be created. The name can contain only digits, letters, and underscores (_), but cannot contain only digits or start with an underscore (_). The length of the database name cannot exceed 128 characters. It is recommended that the name contain the MRS security cluster name to distinguish security authentication information of different clusters.
Type	Select Kerberos.
Username	Username for logging in to the security cluster.
krb5_conf Path	OBS path to which the krb5.conf file is uploaded NOTE: The renew_lifetime configuration item under [libdefaults] must be removed from krb5.conf. Otherwise, the Message stream modified (41) problem may occur.
keytab Path	OBS path to which the user.keytab file is uploaded

Kafka

**Table 3** Parameters
Parameter	Description
Authentication Certificate	Name of the datasource authentication information to be created. The name can contain only digits, letters, and underscores (_), but cannot contain only digits or start with an underscore (_). The length of the database name cannot exceed 128 characters.
Type	Select Kafka_SSL.
Truststore Path	OBS path to which the SSL truststore file is uploaded.
Truststore Password	Truststore password.
Keystore Path	OBS path to which the SSL keystore file (key and certificate) is uploaded.
Keystore Password	Keystore (key and certificate) password.
Key Password	Password of the private key in the keystore file.

Password (datasource password authentication)

Create datasource authentication for accessing DWS, RDS, DCS, and DDS data sources.

**Table 4** Parameters
Parameter	Description
Authentication Certificate	Name of the datasource authentication information to be created. The name can contain only digits, letters, and underscores (_), but cannot contain only digits or start with an underscore (_). The length of the database name cannot exceed 128 characters.
Type	Select Password.
Username	Username for accessing the datasource
Password	Password for accessing the datasource

Searching for a Datasource Authentication

On the Datasource Authentication tab, you can enter the authentication information name in the search box to search for the matching authentication information. To ensure user information security, the password field is not returned.

Updating Authentication Information

On the Datasource Authentication tab, click Update in the Operation column of the authentication information to be modified. Currently, only the username and password can be updated. If you need to update the certificate, delete the authentication information and create a new one.

The username and password are optional. If they are not set, the field is not modified.