Linux
如何將 Ubuntu 初始化腳本轉換為 Amazon Linux AMI 初始化腳本？
我有一個基於 Ubuntu 的 Amazon EC2 伺服器，我在其中執行基於 Java 的應用程序。為此，我編寫了一個執行完美的初始化腳本，如下所示
#! /bin/sh # set the environment variables that are used PATH=/sbin:/usr/sbin:/bin:/usr/bin JAVA_HOME=/usr/lib/jvm/java-6-sun/jre JAVA=$JAVA_HOME/bin/java DESC="My Application" NAME="myserver" DAEMON=$JAVA DAEMON_HOME="/home/ganesh/MyServer/" JAR=$DAEMON_HOME/MyServer.jar DAEMON_ARGS="-Xms512m -Xmx4112m -jar $JAR" PIDFILE=/var/run/$NAME.pid SCRIPTNAME=/etc/init.d/myserver #the user that will run the script USER=ganesh # Load the VERBOSE setting and other rcS variables . /lib/init/vars.sh # Define LSB log_* functions. # Depend on lsb-base (>= 3.0-6) to ensure that this file is present. . /lib/lsb/init-functions # # Function that starts the daemon/service # do_start() { start-stop-daemon -N -10 -b --start -d $DAEMON_HOME --quiet --chuid $USER -m -p $PIDFILE --exec $DAEMON -- $DAEMON_ARGS \ || return 2 #Test to see if the engine has started start-stop-daemon -b --test --start -d $DAEMON_HOME --quiet --chuid $USER -m -p $PIDFILE --exec $DAEMON -- $DAEMON_ARGS >/dev/null 2>&1 case "$?" in 0) echo "[ FAIL ] App Engine has not started";; 1) echo "[ OK ] App Engine has started";; esac } # # Function that stops the daemon/service # do_stop() { start-stop-daemon --stop --retry 120 --oknodo --pidfile $PIDFILE RETVAL="$?" rm -f $PIDFILE return "$RETVAL" } case "$1" in start) [ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME" echo "Starting $DESC" "$NAME" do_start case "$?" in 0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;; 2) [ "$VERBOSE" != no ] && log_end_msg 1 echo "[ FAIL ]";; esac ;; stop) [ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME" echo "Stopping $DESC" "$NAME" do_stop case "$?" in 0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;; 2) [ "$VERBOSE" != no ] && log_end_msg 1 ;; esac echo "[ OK ]" ;; restart) # # If the "reload" option is implemented then remove the # 'force-reload' alias # log_daemon_msg "Restarting $DESC" "$NAME" echo "Restarting $DESC" "$NAME" do_stop case "$?" in 0|1) do_start case "$?" in 0) log_end_msg 0 ;; 1) log_end_msg 1 ;; # Old process is still running *) log_end_msg 1 ;; # Failed to start esac ;; *) # Failed to stop log_end_msg 1 ;; esac ;; *) echo "Usage: $SCRIPTNAME {start|stop|restart}" >&2 exit 3 ;; esac :現在我已經將我的伺服器從 Ubuntu 移到了 Amazon Linux AMI。所以我將上面的初始化腳本更改如下
#!/bin/bash # Source function library. . /etc/init.d/functions RETVAL=0 prog="myserver" LOCKFILE=/var/lock/subsys/$prog PIDFILE=/var/run/$prog.pid PATH=/sbin:/usr/sbin:/bin:/usr/bin JAVA=/usr/bin/java DESC="MY Application" DAEMON=$JAVA DAEMON_HOME="/home/ganesh/MyServer" JAR=$DAEMON_HOME/MyServer.jar DAEMON_ARGS="-Xms512m -Xmx4112m -jar $JAR" PIDFILE=/var/run/$NAME.pid SCRIPTNAME=/etc/init.d/myserver #the user that will run the script USER=root echo "All value sets" start() { echo "IN start" echo -n "Starting $prog: " daemon --user $USER --chdir $DAEMON_HOME --pidfile $PIDFILE $DAEMON -- $DAEMON_ARGS RETVAL=$? [ $RETVAL -eq 0 ] && touch $LOCKFILE echo return $RETVAL } stop() { echo -n "Shutting down $prog: " killproc --pidfile RETVAL=$? [ $RETVAL -eq 0 ] && rm -f $LOCKFILE echo return $RETVAL } status() { echo -n "Checking $prog status: " RETVAL=$? return $RETVAL } case "$1" in start) start ;; stop) stop ;; status) status ;; restart) stop start ;; *) echo "Usage1: $prog {start|stop|status|restart}" exit 1 ;; esac exit $RETVAL我在替換啟動和停止功能中的以下主線時遇到了麻煩
start-stop-daemon -N -10 -b --start -d $DAEMON_HOME --quiet --chuid $USER -m -p $PIDFILE --exec $DAEMON -- $DAEMON_ARGS \ || return 2和
start-stop-daemon --stop --retry 120 --oknodo --pidfile $PIDFILEAmazon Linux 將 ‘start-stop-daemon’ 替換為 ‘daemon’ 並在手冊頁的幫助下，我將上面的行更改如下
daemon --user $USER --chdir $DAEMON_HOME --pidfile $PIDFILE $DAEMON -- $DAEMON_ARGS和
killproc --pidfile但它給出了以下錯誤。
啟動 myserver: ./myserver: Usage: daemon
$$ +/-nicelevel $${程序}
有人會指導我為 Amazon Linux AMI 編寫正確的初始化腳本嗎？
編輯：
在啟動函式中，我做了以下更改，現在這個腳本啟動了守護程序，但未能創建 pidfile，因此無法停止守護程序
cd $DAEMON_HOME daemon --user $USER --pidfile $PIDFILE $DAEMON $DAEMON_ARGS >/dev/null 2>&1 &那麼任何人都可以向我建議它有什麼問題以及我需要做什麼以便它應該自動創建 pid 文件？
我將腳本更新為以下程式碼。雖然它無法創建 pidfile，但它可以按我的意願工作。如果有人有更好的腳本，請發布您的答案。
#!/bin/bash # chkconfig: 2345 95 05 # description: MY Application # Source function library. . /etc/init.d/functions RETVAL=0 prog="myserver" PIDFILE=/var/run/$prog.pid LOCKFILE=/var/lock/subsys/$prog PATH=/sbin:/usr/sbin:/bin:/usr/bin JAVA=/usr/bin/java DESC="MY Application" DAEMON=$JAVA DAEMON_HOME="/home/ganesh/MyServer/" JAR=$DAEMON_HOME/MyServer.jar DAEMON_ARGS="-Xms512m -Xmx4112m -jar $JAR" SCRIPTNAME=/etc/init.d/myserver #the user that will run the script USER=root #echo "All value sets" start() { if [ -f $LOCKFILE ]; then echo "$DESC is already running. Exiting." exit 1 else echo -n "Starting $prog:" cd $DAEMON_HOME daemon --user $USER --pidfile $PIDFILE $DAEMON $DAEMON_ARGS >/dev/null 2>&1 & RETVAL=$? echo [ $RETVAL -eq 0 ] && touch $LOCKFILE fi return $RETVAL } stop() { echo -n "Shutting down "$prog: kill -9 `ps -ef | grep "$JAR" | grep -v grep | awk '{ print $2 }'` RETVAL=$? echo [ $RETVAL -eq 0 ] && rm -f $LOCKFILE return $RETVAL } check_status() { #echo -n "Checking $prog status: " status $prog RETVAL=$? return $RETVAL } case "$1" in start) start ;; stop) stop ;; status) check_status ;; restart) stop start ;; *) echo "Usage: $prog {start|stop|status|restart}" exit 1 ;; esac exit $RETVAL編輯：
上面腳本的另一個版本，我在其中創建 pid 文件並使用它來獲取狀態並停止應用程序。我認為下面的腳本比上面的更可靠。
#!/bin/bash # chkconfig: 2345 95 05 # description: MY Application # Source function library. . /etc/init.d/functions RETVAL=0 prog="myserver" PIDFILE=/var/run/$prog.pid LOCKFILE=/var/lock/subsys/$prog PATH=/sbin:/usr/sbin:/bin:/usr/bin JAVA=/usr/bin/java DESC="MY Application" DAEMON=$JAVA DAEMON_HOME="/home/ganesh/MyServer/" JAR=$DAEMON_HOME/MyServer.jar DAEMON_ARGS="-Xms512m -Xmx4112m -jar $JAR" SCRIPTNAME=/etc/init.d/myserver #the user that will run the script USER=root #echo "All value sets" start() { if [ -f $PIDFILE ]; then PID=`cat $PIDFILE` if [ -z "`pgrep $PID`" ] && [ "$PID" != "`ps aux|grep -vE 'grep|runuser|bash'|grep -w "$JAR"|awk '{print $2}'`" ]; then printf "%s\n" "Process dead but pidfile exists" else printf "$prog is already running!\n" fi else printf "%-50s" "Starting $prog ..." cd $DAEMON_HOME daemon --user $USER $DAEMON $DAEMON_ARGS >/dev/null 2>&1 & sleep 5 PID=`ps aux|grep -vE 'grep|runuser|bash'|grep -w "$JAR"|awk '{print $2}'` if [ -z "$PID" ]; then printf "[ \e[31mFAIL\033[0m ]\n" else echo $PID > $PIDFILE printf "[ \e[32mOK\033[0m ]\n" fi fi } stop() { printf "%-50s" "Shutting down $prog:" if [ -f $PIDFILE ]; then PID=`cat $PIDFILE` kill -HUP $PID 2>/dev/null printf "[ \e[32mOK\033[0m ]\n" rm -f $PIDFILE else printf "[ \e[31mFAIL\033[0m ]\n" fi } check_status() { printf "%-50s" "Checking $prog ..." if [ -f $PIDFILE ]; then PID=`cat $PIDFILE` if [ -z "`pgrep $PID`" ] && [ "$PID" != "`ps aux|grep -vE 'grep|runuser|bash'|grep -w "$JAR"|awk '{print $2}'`" ]; then printf "%s\n" "Process dead but pidfile exists" else printf "[ \e[32mRUNNING\033[0m ]\n" fi else printf "[ \e[31mSTOPPED\033[0m ]\n" fi } case "$1" in start) start ;; stop) stop ;; status) check_status ;; restart) stop start ;; *) echo "Usage: $prog {start|stop|status|restart}" exit 1 ;; esac exit 1