Update stack underlying apps running on dokku

update-dokku-stack.sh

#!/bin/bash

# before you can use this, you need to run (as root):
# git clone https://github.com/tt/stack-images.git /root/stack-images
# git clone https://github.com/gliderlabs/herokuish.git /root/herokuish

# First, we need to get our base ubuntu images up to date
docker pull ubuntu-debootstrap:14.04
docker pull ubuntu:trusty # for postgresql

# First update all our dokku plugins from their origins
pushd /var/lib/dokku/plugins
for d in *;
do
  pushd $f
  if git status -s; then
    git pull
  fi
  popd $f
done

# And force them all to rebuild!
dokku plugin:install

# Next, rebuild the heroku cedar stack to get any security updates
pushd /root/stack-images
git pull origin
docker build -t heroku/cedar:14 ./
popd

# build a new herokuish stack on our now-secure cedar stack
pushd /root/herokuish
git pull origin
docker build -t gliderlabs/herokuish:latest ./
popd

# Rebuild all our apps on the new base image
dokku ps:rebuildall
sleep 120 # Sleep to allow old processes to exit

# Now clean up old containers and old images
docker ps -a --no-trunc | grep 'Exit' | awk '{print $1}' | xargs -L 1 -r docker rm
docker rmi $(docker images -f "dangling=true" -q)