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       template=`cat $config_file | docker run -rm -i -a stdin -a stdout samsaffron/discourse ruby -e \
  66         "require 'yaml'; puts YAML.load(STDIN.readlines.join)['template']"`
  67
  68       input=$(cat $config_file)
  69       [ ! -z $template ] && {
  70         input="$input _FILE_SEPERATOR_ $(cat $template)"
  71       }
  72
  73       set_volumes
  74
  75       exec echo "$input" | docker run -cidfile $cidbootstrap -i -a stdin -a stdout -a stderr $volumes samsaffron/discourse /pups/bin/pups --stdin
  76       sleep 5
  77       docker commit `cat $cidbootstrap` samsaffron/discourse $config
  78       docker rm `cat $cidbootstrap` && rm $cidbootstrap
  79       exit 0
  80       ;;
  81
  82   ssh)
  83       if [ ! -e $cidfile ]
  84          then
  85            echo "No cid found"
  86            exit 1
  87          else
  88            cid="`cat $cidfile`"
  89            address="`docker port $cid 22`"
  90            split=(${address//:/ })
  91            exec ssh root@${split[0]} -p ${split[1]}
  92       fi
  93       ;;
  94
  95   stop)
  96       if [ ! -e $cidfile ]
  97          then
  98            echo "No cid found"
  99            exit 1
 100          else
 101            docker stop -t 10 `cat $cidfile`
 102            exit 0
 103       fi
 104       ;;
 105
 106   logs)
 107
 108       if [ ! -e $cidfile ]
 109          then
 110            echo "No cid found"
 111            exit 1
 112          else
 113            docker logs `cat $cidfile`
 114            exit 0
 115       fi
 116       ;;
 117
 118   start)
 119
 120       if [ ! -e $cidfile ]
 121          then
 122            echo "No cid found, creating a new container"
 123            ports=`cat $config_file | docker run -rm -i -a stdout -a stdin samsaffron/discourse ruby -e \
 124                   "require 'yaml'; puts YAML.load(STDIN.readlines.join)['expose'].map{|p| '-p ' << p.to_s << ' '}.join"`
 125
 126            set_volumes
 127
 128            docker run -name $config -cidfile $cidfile $ports -d $volumes samsaffron/discourse:$config /usr/bin/runsvdir -P /etc/service
 129            exit 0
 130          else
 131            echo "cid found, ensuring container is started"
 132            docker start `cat $cidfile`
 133            exit 0
 134       fi
 135       ;;
 136
 137
 138   destroy)
 139       if [ -e $cidfile ]
 140         then
 141           echo "destroying container $cidfile"
 142           docker stop -t 10 `cat $cidfile`
 143           docker rm `cat $cidfile` && rm $cidfile
 144           exit 0
 145         else
 146           echo "nothing to destroy cidfile does not exist"
 147           exit 1
 148       fi
 149       ;;
 150 esac
 151
 152 usage