As per http://blog.docker.com/2015/03/updates-available-to-popular-repos-update-your-images/ docker has stopped answering dockerfile/redis and dockerfile/nginx. Fix all users in our tree. Sadly this means a lot of published examples are now broken.
since GoogleCloudPlatform/kubernetes#5308 got merged cadvisor facilities are built-in in kubelet, so time to update the 'screenshots'... Signed-off-by: António Meireles <antonio.meireles@reformi.st>