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Configure br_storage on infrastructure nodes?

asked 2017-01-27 15:13:57 -0500

bnordgren gravatar image

From the configure target hosts documentation, I am trying to determine whether or not to configure a br_storage bridge on the infrastructure hosts.

This page would seem to indicate "no", by omission. This page, however, has a comment that reads:

# Storage bridge (optional)
#
# Only the COMPUTE and STORAGE nodes must have an IP address
# on this bridge. When used by infrastructure nodes, the
# IP addresses are assigned to containers which use this
# bridge.
#

It sounds pretty necessary according to this second page, so I'll put it in w/no static IP for the host. But it seems like the first page (with the table) is missing a line which would tell you to configure the bridge on infrastructure hosts? Should these be made consistent or are there reasons to not configure br_storage on infrastructure hosts?

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answered 2017-01-29 16:28:48 -0500

chz8494 gravatar image

my experience is that in most cases, storage network requires jumbo frame, while regular data and mgmt traffic may only need mtu 1500. And also, from security point of view, it makes more sense to have a dedicated link only for storage. Of course you can tell openstack to use local disk/lvm, but for a production environment, I think most people will prefer to use cinder-ceph or swift, and all those require a dedicated storage network.

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Asked: 2017-01-27 15:13:57 -0500

Seen: 34 times

Last updated: Jan 27 '17