Pi baker

readme.md

Pi Baker

This script gets a pi up and running for production using hypriot images.

What it does

1. prompts to change the default password
2. removes the built in docker
3. updates the os
4. sets up nfs and mounts the nfs share
5. creates, mounts, and updates fstab with swap space
6. sets up kernel parameters to avoid swap as much as possible
7. installs custom built docker
8. joins the swarm
9. reconnects to network if the network connection is lost
10. sets up docker-gc to run hourly
11. reboots the machine

pirate.sh

#!/usr/bin/env bash

sudo passwd pirate
sudo apt-get remove -y docker-hypriot docker-compose hypriot-cluster-lab
sudo apt-get update && sudo apt-get upgrade -y
sudo apt-get install -y nfs-client make
echo "10.0.0.4:/var/nfs /var/nfs nfs auto,noatime,nolock,bg,nfsvers=4 0 0" | sudo tee -a /etc/fstab
sudo mkdir /var/nfs
sudo mount -a
sudo fallocate -l 2G /swapfile
sudo chmod 600 /swapfile
sudo mkswap /swapfile
sudo swapon /swapfile
echo '/swapfile none swap sw 0 0' | sudo tee -a /etc/fstab
sudo sysctl vm.swappiness=10
echo "vm.swappiness=10" | sudo tee -a /etc/sysctl.conf
sudo sysctl vm.vfs_cache_pressure=50
echo "vm.vfs_cache_pressure=50" | sudo tee -a /etc/sysctl.conf
sudo dpkg -i /var/nfs/docker-dist/docker-engine_1.12.0~rc4-0~jessie_armhf.deb
docker swarm join --secret shadow --manager 10.0.0.6

echo "ping -c4 10.0.0.1 > /dev/null

if [ $? != 0 ]
then
  echo 'No network connection, restarting wlan0'
  /sbin/ifdown 'wlan0'
  sleep 5
  /sbin/ifup --force 'wlan0'
fi" | sudo tee /usr/local/bin/checkwifi.sh
sudo chmod 775 /usr/local/bin/checkwifi.sh
(sudo crontab -l ; echo "*/5 * * * * /usr/bin/sudo -H /usr/local/bin/checkwifi.sh >> /dev/null 2>&1") | sudo crontab -

(sudo crontab -l ; echo "0 * * * * docker run -e FORCE_IMAGE_REMOVAL=1 -e FORCE_CONTAINER_REMOVAL=1 -v /var/run/docker.sock:/var/run/docker.sock --rm eripa/docker-gc-arm") | sudo crontab -

sudo reboot