354 lines
13 KiB
Bash
Executable File
354 lines
13 KiB
Bash
Executable File
#!/bin/bash
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# $0 为当前脚本文件名
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PGR="$0"
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# 循环判断当前脚本是否为软链接，若为软链接，则将当前脚本指向的文件路径赋值给PGR
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while [ -h "$PGR" ]; do
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ls=$(ls -ld "$PGR")
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link=$(expr "$ls" : '.*-> \(.*\)$')
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if expr "$link" : '/.*' > /dev/null; then
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PGR="$link"
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else
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PGR=$(dirname "PGR")/"$link"
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fi
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done
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# 获取当前脚本所在目录
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PRGDIR=$(dirname "$PGR")
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# -z 判断字符串是否为空
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# 若BASEDIR为空，则将当前脚本所在目录的父目录赋值给BASEDIR
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# exit 表示如果 cd 命令执行失败，则执行 exit 命令退出脚本
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[ -z "$BASEDIR" ] && BASEDIR=$(cd "$PRGDIR/.." >/dev/null || exit; pwd)
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if [ -r "$BASEDIR/bin/setenv.sh" ]; then
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source "$BASEDIR"/bin/setenv.sh
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# cut从文件中提取每行的第一个字段，这里使用 -d= 指定 = 号作为分隔符，-f1 表示提取第一个字段
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# grep -v 过滤掉以 # 号开头的行，这些行通常是注释行, -v 表示反向选择，即选择不匹配#开头的行
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export $(cut -d= -f1 "$BASEDIR/bin/setenv.sh"|grep -v '^#')
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fi
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if [ -z "INSTANCE_NAME" ]; then
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INSTANCE_NAME=$CONFIG_INSTANCE_NAME
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if [ -z "$INSTANCE_NAME" ]; then
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echo "error:INSTANCE_NAME not set, Operation aborted"
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exit 1
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fi
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fi
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if [ -z "$LOG_BASE_PATH" ]; then
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LOG_BASE="$BASEDIR"/log
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else
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LOG_BASE="$LOG_BASE_PATH"/startlog
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fi
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# 如果不存在则创建该目录，并且创建过程中的标准错误被重定向到 /dev/null
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if [ -z "$LOG_BASE" ]; then
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# 先将标准输出与标准错误重定向到/dev/null，然后再将标准错误重定向到标准输出，只将错误命令进行输出到控制台
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mkdir -p "$LOG_BASE" >/dev/null 2>&1
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fi
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# 2>&1 将标准错误重定向到标准输出，程序或命令的正常输出和错误输出就可以在标准输出中查看
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# >/dev/null 2>&1 这样用的原因是: 如果命令出错，那么错误信息不会输出到/dev/null，仍然会输出屏幕上；
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# 但是如果将标准错误重定向到标准输出上，那么错误信息就会随着标准输出重定向到/dev/null中
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# 控制台输出为空输出
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if [ -z "$CONSOLE_OUT" ]; then
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CONSOLE_OUT=/dev/null
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fi
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if [ -z "$INSTANCE_PID" ]; then
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INSTANCE_PID="$BASEDIR/bin/.pid"
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fi
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# 当tty是可用时, 不会输出到控制台
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have_tty=0
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# 当前进程是否关联到一个终端设备,如果是，have_tty设为1
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if [ "$(tty)"!= "not a tty" ]; then
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have_tty=1
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fi
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if [ -z "$UMASK" ]; then
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UMASK="0027"
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fi
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# 设置当前shell进程的UMASK值为$UMASK。
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umask $UMASK
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# 重新设置 _NOHUP 变量的值，USE_NOHUP 是一个用于控制是否使用 _NOHUP 命令的开关
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unset _NOHUP
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if [ "$USE_NOHUP" = "true" ]; then
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_NOHUP="nohup"
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fi
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# --------------------------------- Execute The Requested Command ----------------------------------
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# 从 INSTANCE_NAME 变量的值中提取出前两个部分，并将其赋值给 CLUSTER_NAME 变量,-d 参数指定了分隔符为 _
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CLUSTER_NAME=$(echo "$(INSTANCE_NAME)" | cut -f 1,2 -d '_')
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showHelp() {
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echo "Usage: bootstrap.sh ( command ... )"
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echo "commands:"
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echo " start Start Instance ${INSTANCE_NAME} in a separate window"
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echo " debug Start Instance ${INSTANCE_NAME} in a separate window with debug"
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echo " restart Restart Instance ${INSTANCE_NAME} in a separate window"
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echo " stop Stop Instance ${INSTANCE_NAME}, waiting up to 5 seconds for the process to end"
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echo " stop n Stop Instance ${INSTANCE_NAME}, waiting up to n seconds for the process to end"
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echo " stop -force Stop Instance ${INSTANCE_NAME}, waiting up to 5 seconds and then use kill -KILL if still running"
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echo " stop n -force Stop Instance ${INSTANCE_NAME}, waiting up to n seconds and then use kill -KILL if still running"
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echo "Note: Waiting for the process to end and use of the -force option require that \$INSTANCE_PID is defined."
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}
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startInstance() {
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# $@ 表示传递给脚本的所有参数，并赋值给 APP_ARGUMENTS 变量
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APP_ARGUMENTS="$APP_ARGUMENTS $@"
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START_COMMON="START_COMMON $APP_ARGUMENTS"
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echo "Start instance: $INSTANCE_NAME"
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echo "Start common: $START_COMMON"
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# -n 选项表示不输出换行符，-e 选项表示解释转义字符
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echo -ne "start instance ......"
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# -z 检查字符串是否为空，不为空进入
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if [ ! -z "$INSTANCE_PID" ]; then
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# -f 选项表示检查文件是否存在，存在进入
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if [ -f "$INSTANCE_PID" ]; then
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# -s 选项表示检查文件是否为空，不为空进入
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if [ -s "$INSTANCE_PID" ]; then
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echo "Exiting PID file found during start."
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# -r 选项表示检查文件是否可读，可读进入
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if [ -r "$INSTANCE_PID" ]; then
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# 读取 INSTANCE_PID 文件中的内容，并赋值给 PID 变量
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PID=$(cat "$INSTANCE_PID")
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# 使用 ps 命令检查进程是否存在，-p 选项指定进程号，>/dev/null 2>&1
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ps -p "$PID" >/dev/null 2>&1
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# 如果进程存在，获取实际实例进程的进程号, $?表示上一个命令的退出状态码
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if [ $? -eq 0 ]; then
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#
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PID_INS=$(ps -ef|grep "${PID_CHECK_FLAG}"|grep -v grep| grep -v 'bootstarp.sh' | awk '{print $2}'|head -n 1)
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if [ "$PID_INS" = "" ]; then
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echo "$INSTANCE_NAME not is running!"
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echo "Force removing/clearing stale pid file."
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rm -rf "$INSTANCE_PID" >/dev/null 2>&1
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if [ $? != 0 ]; then
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if [ ! -w "$INSTANCE_PID" ]; then
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echo "warning:Unable to remove or write to empty PID file.Start aborted."
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exit 1
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fi
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fi
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else
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echo "INSTANCE $INSTANCE_NAME to still be running with PID $PID.Start aborted."
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echo "If the following process is not a INSTANCE $INSTANCE_NAME process, remove the PID file and try again:"
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ps -f -p "$PID"
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exit 1
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fi
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else
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echo "Removing/clearing stale pid file."
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rm -rf "$INSTANCE_PID" >/dev/null 2>&1
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if [ $? != 0 ]; then
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if [ -w "$INSTANCE_PID" ]; then
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# 清空文件内容
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cat /dev/null > "$INSTANCE_PID"
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else
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echo "warning:Unable to remove or write to empty PID file.Start aborted."
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exit 1
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fi
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fi
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fi
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else
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echo "warning:Unable to read PID file.Start aborted."
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exit 1
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fi
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else
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rm -f "$INSTANCE_PID" >/dev/null 2>&1
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if [ $? != 0 ]; then
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if [ ! -w "$INSTANCE_PID" ]; then
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echo "warning:Unable to remove or write to empty PID file.Start aborted."
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exit 1
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fi
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fi
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fi
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fi
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fi
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shift # 移除传递给脚本的第一个参数
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eval "$START_COMMON" # 恢复原先初始的命令
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SLEEP=10
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# -gt表示大于的意思
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while [ $SLEEP -gt 0 ]; do
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echo -ne "."
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sleep 1
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SLEEP=$(expr "$SLEEP" - 1)
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done
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PID=$(ps -ef|grep "${PID_CHECK_FLAG}"|grep -v grep| grep -v 'bootstarp.sh' | awk '{print $2}'|head -n 1)
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if [ ! -z "INSTANCE_PID" ]; then
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echo "$PID" > "$INSTANCE_PID"
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fi
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SLEEP=30
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while [ $SLEEP -gt 0 ]; do
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echo -ne "."
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sleep 1
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# 检查进程是否存在 -0 表示检查进程是否存在，$? 表示上一个命令的退出状态码
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kill -0 "$PID" >/dev/null 2>&1
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if [ $? -ne 0 ]; then
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echo -ne "\n"
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echo "warning:Instance $INSTANCE_NAME exit. start failed"
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exit 1
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fi
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#LN=$(netstat -ntlp --numeric-ports 2>/dev/null|grep LISTEN|grep "$PID")
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LN=$(ss -np 2>/dev/null|grep 6379|grep "$PID")
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if [ -z "$LN" ]; then
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echo -ne "\n"
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echo "INSTANCE $INSTANCE_NAME with PID: $PID is running, start success"
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return
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fi
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SLEEP=$(expr "$SLEEP" - 1)
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done
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}
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stopInstance(){
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echo "stop instance ......"
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SLEEP=45
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KILL_SLEEP_INTERVAL=5
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if [ ! -z "$1" ]; then
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echo $1 | grep "[^0-9]" >/dev/null 2>&1
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if [ $? -gt 0]; then
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SLEEP=$1
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fi
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fi
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shift
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FORCE=0
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if [ "$1" = "-force" ]; then
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shift
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FORCE=1
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fi
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PID=""
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if [ ! -z "$INSTANCE_PID" ]; then
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# -f 选项表示检查文件是否存在，存在进入
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if [ -f "$INSTANCE_PID" ]; then
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# -s 选项表示检查文件是否为空，不为空进入
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if [ -s "$INSTANCE_PID" ]; then
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if [ -r "$INSTANCE_PID"]; then
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PID=$(cat "$INSTANCE_PID")
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PID_INS=$(ps -ef|grep "${PID_CHECK_FLAG}"|grep -v grep| grep -v 'bootstarp.sh' | awk '{print $2}'|head -n1)
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# 实际进程为空，清除
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if [ "$PID_INS" = "" ]; then
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echo "$INSTANCE_NAME not is running! Stop will not execute! The real pid info will print!"
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rm -rf "$INSTANCE_PID" >/dev/null 2>&1
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if [ $? -ne 0 ]; then
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if [ ! -w "$INSTANCE_PID" ]; then
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echo "warning:Unable to remove or write to empty PID file.Start aborted."
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exit 1
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fi
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fi
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fi
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fi
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kill -0 "$PID" >/dev/null 2>&1
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if [ $? -gt 0 ]; then
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PID=$(ps -ef|grep "${PID_CHECK_FLAG}"|grep -v grep| grep -v 'bootstarp.sh' | awk '{print $2}'|head -n1)
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fi
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fi
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fi
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fi
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if [ -z "$PID" ]; then
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PID=$(ps -ef|grep "${PID_CHECK_FLAG}"|grep -v grep| awk '{print $2}'|head -n1)
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fi
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if [ -z "$PID" ]; then
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echo "Instance no process found"
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echo "Instance stopped."
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exit 0
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fi
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echo "Attempting to signal the process to stop throught OS signal."
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kill -15 $PID >/dev/null 2>&1
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if [ $FORCE -eq 0 ]; then
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while [ $SLEEP -gt 0 ]; do
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kill -0 $PID >/dev/null 2>&1
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if [ $? -gt 0 ]; then
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rm -f "INSTANCE_PID" >/dev/null 2>&1
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if [ $? -gt 0 ]; then
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if [ -w "$INSTANCE_PID" ]; then
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cat /dev/null > "$INSTANCE_PID"
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FORCE=0
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else
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echo "info:The PID file could not be removed or cleared."
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fi
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fi
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echo "Instance stopped."
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break
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fi
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if [ $SLEEP -gt 0 ]; then
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sleep 1
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fi
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if [ $SLEEP -eq 0 ]; then
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echo "Instance did not stop in time."
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if [ $FORCE -eq 0 ]; then
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echo "warning:PID file was not removed."
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fi
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echo "To aid diagnostics a thread dump has been written to standard out."
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kill -3 $PID >/dev/null 2>&1
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fi
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SLEEP=$(expr "$SLEEP" - 1)
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done
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elif [ $FORCE -eq 1 ]; then
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sleep 2
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echo "warning:Killing Instance with the PID: $PID"
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kill -9 $PID >/dev/null 2>&1
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while [ $KILL_SLEEP_INTERVAL -ge 0 ]; do
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kill -0 $PID >/dev/null 2>&1
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if [ $? -gt 0 ]; then
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rm -f "$INSTANCE_PID" >/dev/null 2>&1
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if [ $? -gt 0 ]; then
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if [ -w "$INSTANCE_PID" ]; then
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cat /dev/null > "$INSTANCE_PID"
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else
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echo "info:The PID file could not be removed."
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fi
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fi
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echo "warning:The Instance process has been killed."
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break
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fi
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if [ $KILL_SLEEP_INTERVAL -gt 0 ]; then
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sleep 1
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fi
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$KILL_SLEEP_INTERVAL=$(expr "$KILL_SLEEP_INTERVAL" - 1)
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done
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if [ $KILL_SLEEP_INTERVAL -lt 0 ]; then
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echo "warning:Instance has not been killed completey yet."
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fi
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fi
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}
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if [ "$1" = "start" ]; then
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shift
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startInstance "$@"
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elif [ "$1" = "stop" ]; then
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shift
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stopInstance $1 $2
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elif [ "$1" = "restart" ]; then
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shift
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stopInstance "$@"
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startInstance "$@"
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elif [ "$1" = "debug" ]; then
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shift
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startInstance "$@"
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else
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showHelp
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fi
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