MONGODB primary became secondary after servers restart
You need to change the config such that there is only one member remaining, and you have to do it on that host, i.e. Ubuntu12041vanilla:27017

The others are unreachable from its perspective, so even if you go with 2 nodes, 1 out of 2 down means you cannot form a majority and you will still only have secondary state.

Given your current rs.status() output, try this when connected via the mongo shell to Ubuntu12041vanilla:27017:

cfg = rs.conf()
cfg.members = [cfg.members[0]]
rs.reconfig(cfg, {force : true})


That will give you a config only one node and should mean that Ubuntu12041vanilla:27017 will be the only remaining member and primary.