@Rocky i am exploring open source ldap bsed tool suhc as open ldap and apache directory for my coupled version starrokcs that is to be sync between my ds cluster as a part of cross ccluster migration

In StarRocks, using an open-source LDAP tool like OpenLDAP or Apache Directory is a recommended way to manage identities across multiple clusters, especially during a cross-cluster migration. Here is how these tools fit into your migration strategy for a "coupled" (Shared-nothing) StarRocks cluster: 1. LDAP for Identity "Synchronization" Instead of manually syncing local user accounts between clusters, you can point both your source and target clusters to the same LDAP server (OpenLDAP or Apache Directory). This ensures that authentication and group-based permissions are consistent across both environments. * Compatibility: StarRocks supports any LDAP-compliant service. While OpenLDAP is the industry standard for Linux environments, Apache Directory is also supported and often preferred by users who want to use the Apache Directory Studio GUI for management. * Configuration: You can configure this via

fe.conf

or by creating a

SECURITY INTEGRATION

(recommended for v3.1+):

sql
    CREATE SECURITY INTEGRATION ldap_migration
    PROPERTIES (
        "type" = "authentication_ldap_simple",
        "authentication_ldap_simple_server_host" = "your_ldap_host",
        "authentication_ldap_simple_server_port" = "389",
        "authentication_ldap_simple_bind_base_dn" = "ou=users,dc=example,dc=com",
        "authentication_ldap_simple_user_search_attr" = "uid",
        "authentication_ldap_simple_bind_root_dn" = "cn=admin,dc=example,dc=com",
        "authentication_ldap_simple_bind_root_pwd" = "admin_password"
    );

2. Data Synchronization (The Migration Tool) LDAP only handles users and groups. To sync the actual data (tables/metadata) between your "coupled" (Shared-nothing) clusters, you should use the official StarRocks Cross-cluster Data Migration Tool (

starrocks-cluster-sync

). * How it works: It is a standalone binary that reads metadata from the source FE and orchestrates data movement between the source and target BEs. * Recommendation: Install the tool on the target cluster's FE node or a dedicated migration server. * Workflow: 1. Enable legacy compatibility on the target cluster:

ADMIN SET FRONTEND CONFIG("enable_legacy_compatibility_for_replication" = "true");

. 2. Configure the

sync.yaml

with your source and target FE/BE details. 3. Run the tool to start the background synchronization. 3. Which LDAP tool to choose? * OpenLDAP: Best for high-performance, production-grade stability and extensive community support in Linux ecosystems. * Apache Directory: Best if you prefer an all-in-one Java-based solution with a robust graphical management tool (Apache Directory Studio), which can simplify the initial setup of complex OUs (Organizational Units) for your migration. Summary for your "DS Cluster" Migration 1. Identity: Centralize users in OpenLDAP/Apache Directory and connect both clusters to it. 2. Data: Use the StarRocks Cluster Sync Tool to replicate data from your source cluster to the target cluster. 3. Permissions: If you use Group Provider (available from v3.1), you can map LDAP groups to StarRocks roles so that permissions "follow" the users to the new cluster automatically. References • administration/stargo.md • deployment/plan_cluster.md • deployment/deployment_overview.md

plan is to go with openldap @Rocky

Excellent choice. Using OpenLDAP is a robust way to centralize identity management during your cross-cluster migration. To integrate OpenLDAP with your StarRocks clusters, follow these steps for both your source and target clusters: 1. Configure the LDAP Connection The most modern and flexible way to configure LDAP in StarRocks (v3.1+) is via a Security Integration. This avoids having to restart the FE for configuration changes. Run this SQL on both clusters:

sql
CREATE SECURITY INTEGRATION openldap_integration
PROPERTIES (
    "type" = "authentication_ldap_simple",
    "authentication_ldap_simple_server_host" = "10.0.0.5", -- Your OpenLDAP IP/Host
    "authentication_ldap_simple_server_port" = "389",
    "authentication_ldap_simple_bind_base_dn" = "ou=users,dc=example,dc=com",
    "authentication_ldap_simple_user_search_attr" = "uid",
    "authentication_ldap_simple_bind_root_dn" = "cn=admin,dc=example,dc=com",
    "authentication_ldap_simple_bind_root_pwd" = "your_admin_password"
);

2. Map Users to OpenLDAP Since your users are stored in OpenLDAP, you simply need to tell StarRocks to authenticate them against the LDAP service. You have two options when creating users: * Manual Mapping (Explicit DN):

sql
    CREATE USER 'alice'@'%' IDENTIFIED WITH authentication_ldap_simple AS 'uid=alice,ou=users,dc=example,dc=com';

* Automatic Search (Dynamic): If you configured

bind_root_dn

and

user_search_attr

in Step 1, StarRocks can find the DN automatically based on the username:

sql
    CREATE USER 'alice'@'%' IDENTIFIED WITH authentication_ldap_simple;

3. Sync Roles via Group Provider (Recommended) To ensure users have the same permissions on both clusters after migration without manual grant statements, use the LDAP Group Provider (v3.1+). 1. Create a Group Provider:

sql
    CREATE GROUP PROVIDER ldap_groups
    PROPERTIES (
        "type" = "ldap",
        "ldap_group_search_base" = "ou=groups,dc=example,dc=com",
        "ldap_group_search_filter" = "(memberUid={uid})", -- Standard OpenLDAP filter
        "ldap_group_name_attr" = "cn"
    );

2. Bind Group to Role:

sql
    -- Users in the 'analytics' LDAP group automatically get the 'read_only' role
    CREATE ROLE read_only;
    GRANT ROLE read_only TO GROUP 'analytics' IN PROVIDER ldap_groups;

4. Migration Checklist * Consistency: Use the exact same Security Integration and Group Provider configurations on both clusters. * Metadata: Use the StarRocks Cluster Sync Tool to migrate your tables and views. * SSL: If your OpenLDAP requires TLS (LDAPS), set

"authentication_ldap_simple_ssl_conn_allow_insecure" = "false"

and provide the

trust_store_path

in the Security Integration properties. References • administration/user_privs/authentication/ldap_authentication.md • administration/user_privs/authentication/security_integration.md • sql-reference/sql-statements/account-management/CREATE_USER.md References • administration/user_privs/authentication/ldap_authentication.md • administration/user_privs/authentication/security_integration.md • sql-reference/sql-statements/account-management/CREATE_USER.md