Random Elasticsearch fact: When running Elasticsearch from within openvz containers - make sure that you give them veth devices rather than just IP addresses. Otherwise zen discovery will not work.
Proxmox is working out great as a home server. I have many small containers performing various tasks - all with puppet managed config.
This makes it much easier to manage and buildup/teardown when experimenting with different things. Much easier than the previous setup which was one monolithic server which had all the services on it.