Upgrade Docker and restart running containers

upgrade-docker.sh

#!/bin/bash
datenow=$(date +%s)
sudo docker ps > /tmp/docker."$datenow"
sudo apt-get update && sudo apt-get install -y lxc-docker
sudo docker start $(tail -n +2 /tmp/docker."$datenow" | cut -c1-12)

This doesn't deal gracefully with linked containers as it will not respect the dependency chain

What is "$datenow"? Does it need setting outside the script?

@jpetazzo asked me why I didn't use docker ps -q for this (which just lists the container IDs and would avoid the need for cut). The answer is that I like to have the full ps information in a file so I can see what was running if there are errors bringing stuff back up.

good catch @gmarkall - copy/paste error from actual script to gist :(

cool..