[Freeipa-users] Enrolling with multiple IPA servers

[Nordgren, Bryce L -FS]

> The hostname put by ipa-client-install corresponds to the server to which this
> client is enrolled.  You enroll with a single server, after all.

How would one enroll with multiple IPA servers? For instance, a standard configuration for a Rocks HPC cluster is to have at least two and usually three networks active, with different DNS zones for each. The "public" network is "company.example.com", "private" is typically an isolated GbE network named "local", and there's usually a fast network for real work (Infiniband or 10GbE); let's name it "ipoib" for IP over Infiniband. There may also be a slow 100bT network for management.

A few machines have access to all three networks (headnode.company.example.com, headnode.local, and headnode.ipoib). Compute nodes have access to two (compute-0-0.local, compute-0-0.ipoib).

Is it possible to make a single IPA instance manage the two isolated networks (local and ipoib)? Would multiple IPA servers and multiple enrollments be required? Once an IPA solution is defined, how does one configure openssh/sssd/krb5 on the compute nodes such that Kerberos SSO (and NFS server access) works regardless of which isolated network is used for communication?
Would the compute nodes' two-network configuration be extensible to the headnode's three-network configuration?

Thanks,
Bryce




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