@brendandburns (couldn't find alex m. or eric h. on github?) please correct/elaborate any details here...

There are different ways to skin this cat but I think the approach we decided on was:

• cron job on node looks for new version of {kubelet, proxy, ...} and when it finds one, kills currently running version (send a signal for clean shutdown first?) and starts new version [this can be made arbitrarily more complicated, like falling back to old version if new version doesn't work, but better to keep it simple for now]
• out-of-band mechanism to push new version of these components to the nodes (we didn't really talk about this -- how does this work? Salt?)