Tomcat control script, init.d autostart

tomcatctl

#!/bin/sh
# Tomcat Control Script
#
# Usage:
#   ln -s /path/to/tomcatctl $HOME/apache-tomcat-6.0.37/
#   sudo ln -s $HOME/apache-tom-6.0.37/tomcatctl /etc/init.d/tomcatctl
#   sudo /etc/init.d/tomcatctl status
#
#   In crontab
#     */1 * * * * $HOME/apache-tomcat-6.0.37/tomcatctl monitor http://localhost:8080/ > /dev/null || $HOME/apache-tomcat-6.0.37/tomcatctl condrestart > /dev/null
#

CATALINA_HOME=$CATALINA_HOME
JAVA_HOME=$JAVA_HOME

[ -z "$CATALINA_HOME" ] && CATALINA_HOME="$(dirname "$0")"
[ -z "$JAVA_HOME" ] && for _JH in /usr/java/default /usr/lib/jvm/java-6-openjdk-amd64/jre; do
    [ -d "$_JH" ] && JAVA_HOME="$_JH" && break
done

if [ ! -f "$CATALINA_HOME/bin/catalina.sh" ] && [ -L "$0" ]; then
    _L=$(readlink "$0")
    CATALINA_HOME=$(dirname "$_L")
fi

if [ ! -f "$CATALINA_HOME/bin/catalina.sh" ]; then
    echo "Invalid catalina home: $CATALINA_HOME"
    exit 1
fi
export TOMCAT_OWNER=$(stat --format %U $CATALINA_HOME)
if [ "$USER" != "$TOMCAT_OWNER" ]; then
    sudo -u "$TOMCAT_OWNER" "$0" "$@"
    exit $?
fi

export CATALINA_HOME
export JAVA_HOME
export CATALINA_PID=$CATALINA_HOME/catalina.pid
export JAVA_OPTS="-Dfile.encoding=UTF-8 -XX:MaxPermSize=512m -Xms2048m -Xmx2048m"
export LANG="zh_CN.UTF-8"

LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$CATALINA_HOME/lib
export LD_LIBRARY_PATH

CATALINA_TEMP=$CATALINA_HOME/temp
ERROR_CHECK_FILE="$CATALINA_TEMP/tomcatfail"
MAX_ERROR_COUNT=2
STARTUP_WAIT=100
SHUTDOWN_WAIT=30

cd "$CATALINA_HOME"

start() {
    set -e
    echo "Starting Tomcat:  "
    $CATALINA_HOME/bin/startup.sh
    set +e
    sleep 2
    clear_error_check_file
}
stop() {
    [ -f "$CATALINA_PID" ] || return 0
    echo "Stopping Tomcat: "
    TOMCAT_UPTIME=$(tomcat_uptime)
    if [ $STARTUP_WAIT -gt $TOMCAT_UPTIME ]; then
        WAITING_FOR=$(expr $STARTUP_WAIT '-' $TOMCAT_UPTIME)
        for loopIndex in $(seq $WAITING_FOR -1 1); do
            echo -n Waiting for $loopIndex ... $'\r'
            sleep 1 || return 4
        done
    fi
    PID=$(cat "$CATALINA_PID")
    $CATALINA_HOME/bin/shutdown.sh
    for loopIndex in $(seq $SHUTDOWN_WAIT -1 1); do
        echo -n Waiting for $loopIndex ... $'\r'
        sleep 1 || break
        ps -p "$PID" > /dev/null || break;
    done
    if [ -e "$CATALINA_PID" ]; then
        ps -p "$PID" > /dev/null && kill -9 $PID > /dev/null
        rm "$CATALINA_PID"
    fi
    clear_error_check_file
}
restart() {
    stop
    start
}
status() {
    PID=$([ -f "$CATALINA_PID" ] && cat "$CATALINA_PID")
    if [ -z "$PID" ]; then
        echo "Tomcat($CATALINA_HOME) is stoped"
        return 1
    else
        ps -p "$PID" > /dev/null
        if [ 0 -eq $? ]; then
            echo "Tomcat($PID, $CATALINA_HOME) is running..."
            return 0
        else
            echo "PID file exists, but tomcat($CATALINA_HOME) is stoped"
        fi
    fi
    return 2
}
condrestart() {
    status > /dev/null
    if [ 1 -eq $? ]; then
        return 1
    else
        restart
    fi
}
log() {
    tail -f $CATALINA_HOME/logs/catalina.out
}
clear_error_check_file() {
    [ -f "${ERROR_CHECK_FILE}" ] \
    && [ "$(stat --format %s "$ERROR_CHECK_FILE")" -gt 0 ] \
    && mv "${ERROR_CHECK_FILE}" "${ERROR_CHECK_FILE}-$(date '+%Y%m%d%H%M%S')"
    return 0
}
tomcat_uptime() {
    TIMESTAMP_NOW=$(date +%s)
    TIMESTAMP_PID=$(stat --format "%Y" "$CATALINA_PID")
    expr $TIMESTAMP_NOW '-' $TIMESTAMP_PID
}
monitor() {
    TOMCAT_APP_URL="$1"
    [ -z "$TOMCAT_APP_URL" ] && echo "Usage: $0 monitor <url>" && return 0
    status > /dev/null || return $?
    TOMCAT_UPTIME=$(tomcat_uptime)
    [ $STARTUP_WAIT -ge $TOMCAT_UPTIME ] && return 0
    if type tempfile > /dev/null 2>&1; then
        ERROR_OUTPUT=$(tempfile)
    else
        ERROR_OUTPUT="$(date "+/tmp/tempfile%Y%m%d%H%M%S%N")"
    fi
    curl --fail --silent -v --max-time 5 "$TOMCAT_APP_URL" 2> "$ERROR_OUTPUT" 1> /dev/null
    _ERROR_CODE=$?
    if [ "$_ERROR_CODE" -eq 0 ]; then
        clear_error_check_file
    else
        echo "$_ERROR_CODE $(date '+%F %T') $(fgrep --max-count=1 'The requested URL returned error' "$ERROR_OUTPUT")" >> "$ERROR_CHECK_FILE"
        rm "$ERROR_OUTPUT"
        cat "$ERROR_CHECK_FILE"
        ERROR_COUNT=$(cat "$ERROR_CHECK_FILE" | wc -l)
        if [ $ERROR_COUNT -ge $MAX_ERROR_COUNT ]; then
            return 3
        fi
    fi
    return 0
}

# See how we were called.
case "$1" in
    start)
        start
        ;;
    stop)
        stop
        ;;
    status)
        status
        ;;
    restart)
        restart
        ;;
    condrestart)
        condrestart
        ;;
    log)
        log
        ;;
    monitor)
        monitor "$2"
        ;;
    *)
        echo $"Usage: $0 {start|stop|restart|status|condrestart|log|monitor <url>}"
        exit
esac

自己用的一个简单的 Tomcat 自动启动脚本，有简单的监控功能，配合 crontab 可以实现出现故障自动重启。