openstack-ansible/releasenotes/notes/haproxy-package-cache-backe...

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---
features:
- The repo server will now be used as a package manager
cache.
upgrade:
- Haproxy has a new backend to support using the repo
server nodes as a package manager cache. The new backend
is called "repo_cache" and uses port "3142" and a single
active node. All other nodes within the pool are backups
and will be promoted if the active node goes down.
Default ACLs have been created to lock down the port's
availability to only internal networks originating from
an RFC1918 address.