FIX: properly shut down services on "docker stop"

[discourse_docker.git] / launcher

diff --git a/launcher b/launcher
index f03d06d8d945cdc9d6d646d9db87b8ce44d67af3..c39d8a97f6e5f2c3d22aae6ab3ca4b3d375d5aef 100755 (executable)
--- a/launcher
+++ b/launcher
@@ -6,21 +6,35 @@ opt=$3
 
 cd "$(dirname "$0")"
 
-docker_min_version='0.9.1'
-docker_rec_version='0.11.1'
+docker_min_version='1.2.0'
+docker_rec_version='1.2.0'
 
 config_file=containers/"$config".yml
 cidfile=cids/"$config".cid
 cidbootstrap=cids/"$config"_boostrap.cid
 local_discourse=local_discourse
-image=samsaffron/discourse:0.2.5
+image=samsaffron/discourse:1.0.5
 docker_path=`which docker.io || which docker`
 
-docker_ip=`/sbin/ifconfig | \
-                grep -B1 "inet addr" | \
-                awk '{ if ( $1 == "inet" ) { print $2 } else if ( $2 == "Link" ) { printf "%s:" ,$1 } }' | \
-                grep docker0 | \
-                awk -F: '{ print $3 }';`
+if [ "${SUPERVISED}" = "true" ]; then
+  restart_policy="--restart=no"
+  attach_on_start="-a"
+  attach_on_run="-a stdout -a stderr"
+else
+  attach_on_run="-d"
+fi
+
+if [ -x /sbin/ip ]; then
+  docker_ip=`/sbin/ip addr show docker0 | \
+                  grep 'inet ' | \
+                  awk '{ split($2,a,"/"); print a[1] }';`
+else
+  docker_ip=`/sbin/ifconfig | \
+                  grep -B1 "inet addr" | \
+                  awk '{ if ( $1 == "inet" ) { print $2 } else if ( $2 == "Link" ) { printf "%s:" ,$1 } }' | \
+                  grep docker0 | \
+                  awk -F: '{ print $3 }';`
+fi
 
 
 usage () {
@@ -73,11 +87,11 @@ prereqs() {
     exit 1
   fi
 
-  # 2. running aufs 
-  test=`$docker_path info 2> /dev/null | grep 'Driver: aufs'`
-  if [[ "$test" =~ "aufs" ]] ; then : ; else
-    echo "Your Docker installation is not using aufs, in the past we have had issues with it"
-    echo "If you are unable to bootstrap your image (or stop it) please report the issue at:"
+  # 2. running aufs or btrfs
+  test=`$docker_path info 2> /dev/null | grep 'Driver: '`
+  if [[ "$test" =~ [aufs|btrfs] ]] ; then : ; else
+    echo "Your Docker installation is not using the recommended AuFS (union filesystem) and may be unstable."
+    echo "If you are unable to bootstrap / stop your image please report the issue at:"
     echo "https://meta.discourse.org/t/discourse-docker-installation-without-aufs/15639"
   fi
 
@@ -152,11 +166,47 @@ install_docker() {
   exit 1
 }
 
+host_run() {
+  read -r -d '' env_ruby << 'RUBY'
+  require 'yaml'
+
+  input = STDIN.readlines.join
+  yaml = YAML.load(input)
+
+  if host_run = yaml['host_run']
+    params = yaml['params'] || {}
+    host_run.each do |run|
+      params.each do |k,v|
+        run = run.gsub("$#{k}", v)
+      end
+      STDOUT.write "#{run}--SEP--"
+    end
+  end
+RUBY
+
+  host_run=`cat $config_file | $docker_path run --rm -i -a stdout -a stdin $image ruby -e "$env_ruby"`
+
+  while [ "$host_run" ] ; do
+    iter=${host_run%%--SEP--*}
+    echo
+    echo "Host run: $iter"
+    $iter || exit 1
+    echo
+    host_run="${host_run#*--SEP--}"
+  done
+}
+
+
 set_volumes() {
   volumes=`cat $config_file | $docker_path run --rm -i -a stdout -a stdin $image ruby -e \
         "require 'yaml'; puts YAML.load(STDIN.readlines.join)['volumes'].map{|v| '-v ' << v['volume']['host'] << ':' << v['volume']['guest'] << ' '}.join"`
 }
 
+set_links() {
+    links=`cat $config_file | $docker_path run --rm -i -a stdout -a stdin $image ruby -e \
+        "require 'yaml'; puts YAML.load(STDIN.readlines.join)['links'].map{|l| '--link ' << l['link']['name'] << ':' << l['link']['alias'] << ' '}.join"`
+}
+
 set_template_info() {
 
     templates=`cat $config_file | $docker_path run --rm -i -a stdin -a stdout $image ruby -e \
@@ -238,6 +288,17 @@ if [ ! -e $config_file ]
 fi
 
 
+docker_version=($($docker_path --version))
+docker_version=${test[2]//,/}
+
+if compare_version "1.2.0" "$docker_version"; then
+  echo "We recommend you upgrade docker, the version you are running has no restart policies, on reboot your container may not start up"
+  restart_policy=""
+else
+  restart_policy=${restart_policy:---restart=always}
+fi
+
+
 run_mailtest(){
   if [ ! -e $config_file ]; then
     echo "Config does not exist: $config_file" >&2
@@ -258,6 +319,8 @@ run_stop(){
 
 run_start(){
 
+  host_run
+
   if [ ! -e $cidfile ]
      then
        echo "No cid found, creating a new container"
@@ -266,6 +329,7 @@ run_start(){
 
        set_template_info
        set_volumes
+       set_links
 
        existing=`$docker_path ps -a | awk '{ print $1, $(NF) }' | grep "$config$" | awk '{ print $1 }'`
        if [ ! -z $existing ]
@@ -275,8 +339,8 @@ run_start(){
          exit 1
        fi
 
-       $docker_path run "${env[@]}" -h "`hostname`-$config" -e DOCKER_HOST_IP=$docker_ip --name $config -t --cidfile $cidfile $ports \
-                  -d $volumes $local_discourse/$config /sbin/runit
+       $docker_path run $links $attach_on_run $restart_policy "${env[@]}" -h "`hostname`-$config" -e DOCKER_HOST_IP=$docker_ip --name $config -t --cidfile $cidfile $ports \
+                  $volumes $local_discourse/$config /sbin/boot
 
        exit 0
      else
@@ -298,13 +362,16 @@ run_start(){
        fi
 
        echo "cid found, ensuring container is started"
-       $docker_path start `cat $cidfile`
+       $docker_path start $attach_on_start `cat $cidfile`
        exit 0
   fi
 
 }
 
 run_bootstrap(){
+
+  host_run
+
   get_ssh_pub_key
 
   # Is the image available?
@@ -324,6 +391,7 @@ run_bootstrap(){
   fi
 
   set_volumes
+  set_links
 
   rm -f $cidbootstrap
 
@@ -337,7 +405,7 @@ run_bootstrap(){
 
   env=("${env[@]}" "-e" "SSH_PUB_KEY=$ssh_pub_key")
 
-  (exec echo "$input" | $docker_path run "${env[@]}" -e DOCKER_HOST_IP=$docker_ip --cidfile $cidbootstrap -i -a stdin -a stdout -a stderr $volumes $image \
+  (exec echo "$input" | $docker_path run $links "${env[@]}" -e DOCKER_HOST_IP=$docker_ip --cidfile $cidbootstrap -i -a stdin -a stdout -a stderr $volumes $image \
      /bin/bash -c "$run_command") \
      || ($docker_path rm `cat $cidbootstrap` && rm $cidbootstrap)
 
@@ -432,8 +500,10 @@ case "$command" in
       ;;
 
   rebuild)
-      echo "Updating discourse docker"
-      git pull || (echo 'failed to update' && exit 1)
+      if [ "$(git symbolic-ref --short HEAD)" == "master" ]; then
+        echo "Updating discourse docker"
+        git pull || (echo 'failed to update' && exit 1)
+      fi
       if [ -e $cidfile ]
         then
           echo "Stopping old container"