LAM-49 Created Apache HDFS and Yarn init scripts.

ansible/roles/apache-hadoop/tasks/setup.yml

@@ -23,3 +23,9 @@
   - name: Configure Apache Yarn.
     template: src=yarn-site.xml.j2 dest="{{ installation_path }}/hadoop/etc/hadoop/yarn-site.xml" owner=root group=root mode=0644
 
+  - name: Copy Apache HDFS init script.
+    template: src=hdfs-init.j2 dest=/etc/init.d/hdfs-init owner=root group=root mode=0755
+
+  - name: Copy Apache Yarn init script.
+    template: src=yarn-init.j2 dest=/etc/init.d/yarn-init owner=root group=root mode=0755
+

ansible/roles/apache-hadoop/templates/hdfs-init.j2

+#!/bin/bash
+
+# The path where Apache Hadoop is installed.
+INSTALLATION_PATH="{{ installation_path }}"
+
+# The full path of the pid file to use.
+PIDFILE="$INSTALLATION_PATH/hadoop/hdfs.pid"
+
+# The full path of the lock file to use.
+LOCKFILE="$INSTALLATION_PATH/hadoop/hdfs-lock"
+
+# The command that will start Apache HDFS.
+START_COMMAND="$INSTALLATION_PATH/hadoop/sbin/start-dfs.sh"
+
+start(){
+  touch $PIDFILE
+  nohup $START_COMMAND & echo $! > $PIDFILE
+  RETVAL=$?
+  [ $RETVAL -eq 0 ] && touch $LOCKFILE
+  return $RETVAL
+}
+
+stop(){
+  kill -s 9 $(cat $PIDFILE)
+  RETVAL=$?
+  [ $RETVAL -eq 0 ] && $(rm -f $LOCKFILE)
+  return $RETVAL
+}
+
+restart(){
+  stop
+  start
+}
+
+RETVAL=0
+
+case "$1" in
+  start)
+    start
+    ;;
+  stop)
+    stop
+    ;;
+  restart|reload|force-reload)
+    restart
+    ;;
+  condrestart)
+    [ -f $LOCKFILE ] && restart || :
+    ;;
+  status)
+    ps -p $(cat $PIDFILE)
+    RETVAL=$?
+    ;;
+  *)
+    echo "Usage: $0 {start|stop|status|restart|reload|force-reload|condrestart}"
+    RETVAL=1
+esac
+
+exit $RETVAL
+

ansible/roles/apache-hadoop/templates/yarn-init.j2

+#!/bin/bash
+
+# The path where Apache Hadoop is installed.
+INSTALLATION_PATH="{{ installation_path }}"
+
+# The full path of the pid file to use.
+PIDFILE="$INSTALLATION_PATH/hadoop/yarn.pid"
+
+# The full path of the lock file to use.
+LOCKFILE="$INSTALLATION_PATH/hadoop/yarn-lock"
+
+# The command that will start Apache Yarn.
+START_COMMAND="$INSTALLATION_PATH/hadoop/sbin/start-yarn.sh"
+
+start(){
+  touch $PIDFILE
+  nohup $START_COMMAND & echo $! > $PIDFILE
+  RETVAL=$?
+  [ $RETVAL -eq 0 ] && touch $LOCKFILE
+  return $RETVAL
+}
+
+stop(){
+  kill -s 9 $(cat $PIDFILE)
+  RETVAL=$?
+  [ $RETVAL -eq 0 ] && $(rm -f $LOCKFILE)
+  return $RETVAL
+}
+
+restart(){
+  stop
+  start
+}
+
+RETVAL=0
+
+case "$1" in
+  start)
+    start
+    ;;
+  stop)
+    stop
+    ;;
+  restart|reload|force-reload)
+    restart
+    ;;
+  condrestart)
+    [ -f $LOCKFILE ] && restart || :
+    ;;
+  status)
+    ps -p $(cat $PIDFILE)
+    RETVAL=$?
+    ;;
+  *)
+    echo "Usage: $0 {start|stop|status|restart|reload|force-reload|condrestart}"
+    RETVAL=1
+esac
+
+exit $RETVAL
+