- Only one user repository can be configured to be the target for creating users/groups from the administration console. By default, this is the file repository, but this can be changed, as you will see later. You can use the user and group management wsadmin commands to create users/groups in other repositories, or use native tools for those repositories.
- The username (for example, LDAP uid) must be unique across the different repositories. For example, users cannot have the same uid in different LDAP directories, even under different org structures.
- If one or more repository in the federation is down, you will not be able to authenticate (even as an admin), regardless of which repository your particular ID is stored in. The VMM component always checks all repositories before letting an authentication to succeed.
- Although VMM has the capability to support multiple realms, WebSphere Application Server only supports a single realm at this time. This is defined at the cell level and is shared by all applications.
Showing posts with label describefederatedrepository. Show all posts
Showing posts with label describefederatedrepository. Show all posts
Limitations of federated repository
What is virtual memeber manager
The Virtual Member Manager is a new component that incorporates some of the existing capabilities in the WebSphere registry, the WebSphere Member Manager (from WebSphere Portal), and a subset of the secure administrations functions. The goals of the VMM are to:
Important Note: custom repository is not included in the list of what can make up a federated repository realm. As it exists today, VMM does not support custom repositories. Therefore, if you need a custom repository, you cannot use VMM. Instead, you must write a custom user registry, the same as you needed to do in previous releases.
A federated repository contains a realm that can consist of identities in:
Unlike with the local operating system, standalone LDAP directory, or custom registry options, federated repositories provide user and group management with read and write capabilities. When you configure federated repositories, you can add, create, and delete users and groups using one of these:
- Provide a repository-independent programming interface.
- Support various pluggable repositories.
- Provide the ability for users to achieve a single view of their own multiple repositories in a federated model.
Important Note: custom repository is not included in the list of what can make up a federated repository realm. As it exists today, VMM does not support custom repositories. Therefore, if you need a custom repository, you cannot use VMM. Instead, you must write a custom user registry, the same as you needed to do in previous releases.
A federated repository contains a realm that can consist of identities in:
- The file-based repository that is built into the system.
- One or more external LDAP repositories.
- A JDBC accessible database repository.
Unlike with the local operating system, standalone LDAP directory, or custom registry options, federated repositories provide user and group management with read and write capabilities. When you configure federated repositories, you can add, create, and delete users and groups using one of these:
- User/group management application programming interfaces (API).
- Administrative console.
- wsadmin commands.
What is federated repository
Before now, the support in IBM WebSphere Application Server for environments where user information was stored in multiple independent user registries was somewhat limited. Prior to Version 6.1, the only registry options available were:
It is possible to implement a Custom User Registry that enables access to multiple other registries, but this can involve a significant development effort that ultimately would only support read-only operations.
WebSphere Application Server V6.1 provides a new option: a federated user repository. This feature makes it much simpler to use multiple repositories, since this capability is achieved through configuration -- rather than development -- with the use of the new Virtual Member Manager (VMM).
In essence, this feature provides the ability to map entries from multiple individual user repositories into a single virtual repository. The federated repository consists of a single named realm, which is a set of independent user repositories. Each repository may be an entire external repository or, in the case of LDAP, a subtree within that repository. The root of each repository is mapped to something called a base entry within the federated repository, which is basically a starting point within the hierarchical namespace of the virtual realm.
What we are discussing here is the idea of one logical registry containing users from multiple underlying repositories. To the WebSphere Application Server runtime, there is still only one registry, and thus, all applications in the cell still share this one single registry
A federated repository enables you to use multiple repositories with WebSphere Application Server V6.1. These repositories, which can be file-based repositories, LDAP repositories, or a sub-tree of an LDAP repository, are defined and theoretically combined under single realm. All of the user repositories that are configured under the federated repository functionality are transparent to WebSphere Application Server.
Tips for multiple user repositories: The user ID and the DN for an LDAP repository must be unique in multiple user repositories that are configured under the same federated repository configuration. In addition, the federated repositories functionality in WebSphere Application Server supports the logical joining of entries across multiple user repositories when the application server searches and retrieves entries from the repositories.
- Local operating system registry.
- A single, standalone Lightweight Directory Access Protocol (LDAP) registry.
- A single implementation of the Custom User Registry interface.
It is possible to implement a Custom User Registry that enables access to multiple other registries, but this can involve a significant development effort that ultimately would only support read-only operations.
WebSphere Application Server V6.1 provides a new option: a federated user repository. This feature makes it much simpler to use multiple repositories, since this capability is achieved through configuration -- rather than development -- with the use of the new Virtual Member Manager (VMM).
In essence, this feature provides the ability to map entries from multiple individual user repositories into a single virtual repository. The federated repository consists of a single named realm, which is a set of independent user repositories. Each repository may be an entire external repository or, in the case of LDAP, a subtree within that repository. The root of each repository is mapped to something called a base entry within the federated repository, which is basically a starting point within the hierarchical namespace of the virtual realm.
What we are discussing here is the idea of one logical registry containing users from multiple underlying repositories. To the WebSphere Application Server runtime, there is still only one registry, and thus, all applications in the cell still share this one single registry
A federated repository enables you to use multiple repositories with WebSphere Application Server V6.1. These repositories, which can be file-based repositories, LDAP repositories, or a sub-tree of an LDAP repository, are defined and theoretically combined under single realm. All of the user repositories that are configured under the federated repository functionality are transparent to WebSphere Application Server.
Tips for multiple user repositories: The user ID and the DN for an LDAP repository must be unique in multiple user repositories that are configured under the same federated repository configuration. In addition, the federated repositories functionality in WebSphere Application Server supports the logical joining of entries across multiple user repositories when the application server searches and retrieves entries from the repositories.
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