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Why openshift requires DNS server



Hi,

I'm learning OpenShift by setting up cluster with VMs.

From the document, some content about DNS is as below,

OpenShift Origin requires a fully functional DNS server in the environment. This is ideally a separate host running DNS software and can provide name resolution to hosts and containers running on the platform.


Why does separate dns server need? Could kub-dns be used?


Thanks,

Jared, (韦煜)
Software developer
Interested in open source software, big data, Linux


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