I'm wondering if anyone can give some clustering recommendations to me. I'm currently on Linode, which I'm impressed and happy with, but they (along with just about every other VPS provider I know of) don't allow broadcast/multicast addressing, only unicast.
The tools I've been trying to set up for failover (keepalived / wackamole+spread) only work over multicast, as far as I know. If I'm wrong, please let me know and point me to an example configuration.
I've now read that Heartbeat can use unicast, but that it does it over multicast protocol. Not sure if this will work or not, and I'd like opinions before I try to spend more time installing it.
My ultimate goal is to have N servers share N ip addresses, and if one server goes down, server A takes its IP, if another server goes down, server B takes its IP, etc. From what I've read wackamole is the best option for this, but I just can't get spread to work on Linode.
Has anyone successfully set up clustering/failover on a VPS/cloud provider (without multicast)? I'd really appreciate some pointers and advice.