一个通用的Spring Boot启停脚本

一个通用的Spring Boot启停脚本

#!/bin/bash
app_name='study-0.0.1-SNAPSHOT.jar'
log_file=${app_name%.*}.log
log_file_back="${log_file%.*}_$(date +%Y%m%d_%H%M%S).log"

pid=`ps -ef | grep $app_name | grep -v grep | awk '{print $2}' | head -n 1`
# 计数器
count=0
# 停止进程等待时间：秒
kill_wait_seconds=45
# 是否成功停止进程的标志
kill_success='null'
# 启动等待时间：秒
start_wait_seconds=45

if [ -n "${pid}" ]; then
    kill_success='true'
fi

# 结束旧进程。
# 使用kill -15结束Spring Boot进程时（优雅停机），默认情况下，若服务超过30s还未结束，则会被强制停机（效果类似于kill -9)
# 若要Spring Boot强制优雅停机，可在配置文件配置server.shutdown=GRACEFUL，还可以配置spring.lifecycle.timeout-per-shutdown-phase=30s指定超时时长
while [ -n "${pid}" ]
do
    if [ $count -eq 0 ]; then
        echo "start kill ***${app_name}*** by pid ${pid}"
        kill -15 $pid
        echo -n 'killing'
    fi
    if [ $count -ge $kill_wait_seconds ]; then
        echo ''
        echo "Kill fail. Please check detail or use \"kill -9 ${pid}\""
        kill_success='false'
        break
    fi
    sleep 1
    echo -n '.'
    pid=`ps -ef | grep $app_name | grep -v grep | awk '{print $2}' | head -n 1`
    count=$((count + 1))
done

if [ $kill_success == 'true' ]; then
    echo ''
    echo "***${app_name}*** kill successed!"
fi

if [ $kill_success != 'false' ]; then
    if [ -f "$log_file" ]; then
        echo "Backing up existing log: ${log_file} -> ${log_file_back}"
        mv "$log_file" "$log_file_back"
    fi

    # 核心启动命令，在此处添加启动参数等
    nohup java -jar $app_name > ${log_file} 2>&1 &

    # 启动命令执行成功，开始监控日志文件
    echo -n "starting"
    count=0
    while [ $count -lt $start_wait_seconds ]
    do
        sleep 1
        echo -n '.'
        if grep -q "Started .* in .* seconds" "${log_file}"; then
            break
        fi
        count=$((count + 1))
    done

    echo ''
    if grep -q "Started .* in .* seconds" "${log_file}"; then
        echo "***${app_name}*** start successed!"
    else
        echo "***${app_name}*** startup time out. No success flag found in ${log_file}."
    fi
fi