launcher

   1 #/bin/bash
   2
   3 command=$1
   4 config=$2
   5 config_file="$config".yml
   6 cidfile=cids/"$config".cid
   7 cidbootstrap=cids/"$config"_boostrap.cid
   8 image=samsaffron/discourse
   9 docker_path=`which docker`
  10
  11 usage () {
  12   echo "Usage: launcher COMMAND CONFIG"
  13   echo "Commands:"
  14   echo "    start:      Start/initialize a container"
  15   echo "    stop:       Stop a running container"
  16   echo "    restart:    Restart a container"
  17   echo "    destroy:    Stop and remove a container"
  18   echo "    ssh:        Start a bash shell in a running container"
  19   echo "    logs:       Docker logs for container"
  20   echo "    bootstrap:  Bootstrap a container for the config base on an image"
  21   exit 1
  22 }
  23
  24 install_docker() {
  25
  26   echo "Docker is not installed, make sure you are running on the 3.8 kernel"
  27   echo "The best supported Docker release is Ubuntu 12.04.03 for it run the following"
  28   echo
  29   echo "sudo apt-get update"
  30   echo "sudo apt-get install linux-image-generic-lts-raring linux-headers-generic-lts-raring"
  31   echo "sudo reboot"
  32   echo
  33
  34   echo "sudo sh -c \"wget -qO- https://get.docker.io/gpg | apt-key add -\""
  35   echo "sudo sh -c \"echo deb http://get.docker.io/ubuntu docker main > /etc/apt/sources.list.d/docker.list\""
  36   echo "sudo apt-get update"
  37   echo "sudo apt-get install lxc-docker"
  38
  39   exit 1
  40 }
  41
  42 set_volumes() {
  43   volumes=`cat $config_file | docker run -rm -i -a stdout -a stdin samsaffron/discourse ruby -e \
  44         "require 'yaml'; puts YAML.load(STDIN.readlines.join)['volumes'].map{|v| '-v ' << v['volume']['host'] << ':' << v['volume']['guest'] << ' '}.join"`
  45 }
  46
  47 [ -z $docker_path ] && {
  48   install_docker
  49 }
  50
  51
  52 [ $# -ne 2 ] && {
  53   usage
  54 }
  55
  56 if [ ! -e $config_file ]
  57   then
  58     echo "Config file was not found, ensure $config_file exists"
  59     exit 1
  60 fi
  61
  62 case "$command" in
  63   bootstrap)
  64
  65       read -r -d '' ruby <<RUBY
  66         require 'yaml'
  67         puts YAML.load(STDIN.readlines.join)["template"]
  68 RUBY
  69
  70       template=`cat $config_file| docker run -rm -i -a stdin -a stdout samsaffron/discourse ruby -e "$ruby"`
  71
  72       input=$(cat $config_file)
  73       [ ! -z $template ] && {
  74         input="$input _FILE_SEPERATOR_ $(cat $template)"
  75       }
  76
  77       set_volumes
  78
  79       exec echo "$input" | docker run -cidfile $cidbootstrap -i -a stdin -a stdout -a stderr $volumes samsaffron/discourse /pups/bin/pups --stdin
  80       sleep 5
  81       docker commit `cat $cidbootstrap` samsaffron/discourse $config
  82       docker rm `cat $cidbootstrap` && rm $cidbootstrap
  83       exit 0
  84       ;;
  85
  86   ssh)
  87       if [ ! -e $cidfile ]
  88          then
  89            echo "No cid found"
  90            exit 1
  91          else
  92            cid="`cat $cidfile`"
  93            address="`docker port $cid 22`"
  94            split=(${address//:/ })
  95            exec ssh root@${split[0]} -p ${split[1]}
  96       fi
  97       ;;
  98
  99   stop)
 100       if [ ! -e $cidfile ]
 101          then
 102            echo "No cid found"
 103            exit 1
 104          else
 105            docker stop -t 10 `cat $cidfile`
 106            exit 0
 107       fi
 108       ;;
 109
 110   logs)
 111
 112       if [ ! -e $cidfile ]
 113          then
 114            echo "No cid found"
 115            exit 1
 116          else
 117            docker logs `cat $cidfile`
 118            exit 0
 119       fi
 120       ;;
 121
 122   start)
 123
 124       if [ ! -e $cidfile ]
 125          then
 126            echo "No cid found, creating a new container"
 127            ports=`cat $config_file | docker run -rm -i -a stdout -a stdin samsaffron/discourse ruby -e \
 128                   "require 'yaml'; puts YAML.load(STDIN.readlines.join)['expose'].map{|p| '-p ' << p.to_s << ' '}.join"`
 129
 130            set_volumes
 131
 132            docker run -name $config -cidfile $cidfile $ports -d $volumes samsaffron/discourse:$config /usr/bin/runsvdir -P /etc/service
 133            exit 0
 134          else
 135            echo "cid found, ensuring container is started"
 136            docker start `cat $cidfile`
 137            exit 0
 138       fi
 139       ;;
 140
 141
 142   destroy)
 143       if [ -e $cidfile ]
 144         then
 145           echo "destroying container $cidfile"
 146           docker stop -t 10 `cat $cidfile`
 147           docker rm `cat $cidfile` && rm $cidfile
 148           exit 0
 149         else
 150           echo "nothing to destroy cidfile does not exist"
 151           exit 1
 152       fi
 153       ;;
 154 esac
 155
 156 usage