LDAP authentication for universes

• YSQL

This section describes how to configure a YugabyteDB Anywhere universe to use an LDAP server such as Active Directory with TLS.

(For information on using LDAP to authenticate with YugabyteDB Anywhere, refer to Enable YugabyteDB Anywhere authentication via LDAP.)

Bind to the LDAP server using TLS

You enable LDAP authentication in the YugabyteDB universe by setting the LDAP configuration using the --ysql_hba_conf_csv flag.

To bind to the LDAP server using TLS, include the ldaptls=1 option in the ysql_hba_conf_csv flag as per the following example:

host all yugabyte 127.0.0.1/0 password,"host all all 0.0.0.0/0 ldap ldapserver=ldapserver.example.org ldapbasedn=""dc=example,dc=org"" ldapsearchattribute=uid ldapbinddn=""cn=admin,dc=example,dc=org"" ldapbindpasswd=secret ldaptls=1"

For more information, see Edit configuration flags.

When entering the flag value in YugabyteDB Anywhere, do not enclose it in single quotes, as you would in a Linux shell.

The first host-based authentication (HBA) rule host all yugabyte 127.0.0.1/0 password allows access to the admin user (yugabyte) from localhost (127.0.0.1) using password authentication. This allows the administrator to sign in as yugabyte to set up the roles and permissions for LDAP users.

The second HBA rule configures LDAP authentication for all other user-host pairs using a search+bind configuration. The YB-TServer binds to the LDAP directory using a fixed user name and password specified with ldapbinddn and ldapbindpasswd. The search is performed over the subtree at ldapbasedn and tries to find an exact match of the attribute specified in ldapsearchattribute.

After the user is found, to verify that the credentials are correct, the server disconnects and rebinds to the directory as this user using the password specified by the client.

For more information on the ysql_hba_conf_csv flag, refer to --ysql_hba_conf_csv flag. For more information on HBA, refer to Host-based authentication.

Example

Consider the following example:

1. Configure YugabyteDB Anywhere with the ysql_hba_conf_csv flag, as outlined in Bind to the LDAP server using TLS.

2. Create a user in Active Directory and validate a successful search for that user, as follows:

   ldapsearch -x -H ldaps://ldapserver.example.org -b dc=example,dc=org 'uid=adam' -D "cn=admin,dc=example,dc=org" -w adminpassword
   

   You should see a response similar to the following:

   # extended LDIF
   #
   # LDAPv3
   # base <dc=example,dc=org> with scope subtree
   # filter: uid=adam
   # requesting: ALL
   
   # adam, example.org
   dn: uid=adam,dc=example,dc=org
   objectClass: top
   objectClass: account
   objectClass: posixAccount
   objectClass: shadowAccount
   cn: adam
   uid: adam
   uidNumber: 16859
   gidNumber: 100
   homeDirectory: /home/adam
   loginShell: /bin/bash
   gecos: adam
   userPassword:: e2NyeXB0fXg=
   shadowLastChange: 0
   shadowMax: 0
   shadowWarning: 0
   
   # search result
   search: 2
   result: 0 Success
   
   # numResponses: 2
   # numEntries: 1
   

   If instead you see a message similar to ldap_sasl_bind(SIMPLE): Can't contact LDAP server (-1), then you have a network, certificate, or binding (authentication) problem. See Troubleshoot LDAP issues.

3. Create the user in YugabyteDB, as follows:

   ysqlsh exampledb
   

   Password for user yugabyte: yugabyte
   ysqlsh (11.2-YB-2.23.0.0-b0)
   Type "help" for help.
   

   exampledb=# CREATE USER adam;
   

4. Verify that the user can authenticate to the database using LDAP, as follows:

   ysqlsh -U adam exampledb
   

   Password for user adam: supersecret
   ysqlsh (11.2-YB-2.23.0.0-b0)
   Type "help" for help.
   

   exampledb=# \conninfo
   

   Expect the following output:

   You are connected to database "exampledb" as user "adam" on host "localhost" at port "5433".
   

Learn more

For more information on LDAP in YugabyteDB, refer to LDAP authentication.