Openstack Keystone LDAP Redux

A recent change in the structure of the Openstack Keystone architecture resulted in the loss of support for an LDAP Backend. I’ve been working to rectify that.  Here’s my set up and the design decisions I’ve made so far.  Since this code is not yet submitted for code review,  there is a good chance that it will change prior to deployment.

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DNS Managers in FreeIPA

The Domain Name System (DNS) is an essential part of systems management. If you need to manage multiple physical hosts you’d really benefit by a degree of control of some subset of DNS. With Virtual machines, the sheer number of hosts created demand a responsive DNS. Kerberos, X509 and other security mechanisms require a proper DNS configuration. Yet, for many organizations, DNS is locked down by IT to a very static set of records. Earlier articles discussed User Groups, Host Groups, and Netgroups. The final installment in this series discsusses how to delegate DNS Zone management in FreeIPA.

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Netgroup Managers in FreeIPA

The last two articles described how to delegate management of user groups and host groups. The other way to manage both hosts and users in FreeIPA is with Netgroups. Although Netgroups are a concept from NIS, FreeIPA takes them to the next level, and makes them into containers capable of managing both users and groups. This article shows how to delegate the control of a netgroup to a specified user.

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Hostgroup Managers in FreeIPA

Last article I discussed delegating the authority to manage group membership using FreeIPA. A related topic delegating the ability to manage groups of hosts. There are two different collections for managing hosts: host groups, and netgroups. The approach to delegating authority for managing each of these is similar, but with important differences. First up: hostgroups.

To create a hostgroup for Beowulf hosts:

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