Ask Your Question

overcloud undercloud

asked 2019-01-29 04:35:18 -0500

lelunicu gravatar image

updated 2019-01-29 04:39:22 -0500

hi, just to understand.

all undercloud instances run on director.yes? the overcloud instances run on compute so on.the provision network is used by undercloud to create new undercloud (compute so on) or overcloud instance(nova so on).yes? the undercloud instances run outside overcloud in director.yes? overcloud or undercloud instances not run in VM.yes? they run in docker containers? tnx

edit retag flag offensive close merge delete

1 answer

Sort by ยป oldest newest most voted

answered 2019-01-30 01:04:32 -0500

zaneb gravatar image


The undercloud is a single machine (often bare-metal, but can be run in a manually managed VM) running a set of OpenStack services, including Ironic. The Red Hat product that provides this functionality is called Director, but the upstream project is TripleO. Only the operators of the main cloud interact with the undercloud.

Ironic on the undercloud is used to provision a bunch of bare-metal servers which are configured as OpenStack controller, compute, and storage nodes. This happens over the provisioning network. In recent versions of TripleO these services are deployed in containers; they are never deployed in VMs. This OpenStack installation is known as the overcloud, and it's the cloud that actual users are expected to interact with.

End-user Nova workloads run in VMs on the overcloud compute nodes.

edit flag offensive delete link more

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

Get to know Ask OpenStack

Resources for moderators

Question Tools

1 follower


Asked: 2019-01-29 04:35:18 -0500

Seen: 97 times

Last updated: Jan 30