常用shell函数

获取内网 IP 地址

Shell脚本中获取本机ip地址的3个方法

# 获取内网 IP 地址
function getInnerNet(){
    # /sbin/ifconfig -a|grep inet|grep -v 127.0.0.1|grep -v inet6|awk '{print $2}'|tr -d "addr:"
  innerIpList=`ip addr |grep inet|grep -v 127.0.0.1|grep -v inet6|awk '{print $2}'|tr -d "addr:" | awk -F '/' '{print $1}'`
  echo "内网 IP 地址(集合)：$innerIpList"
  for ip in $innerIpList
  do
      echo "内网 IP 地址：$ip"
  done
}
# getInnerNet

获取外网地址(公网地址)

# 获取外网 IP 地址
function getOuterNet(){
    outIp=`curl members.3322.org/dyndns/getip`
  echo "外网 IP 地址为：$outIp"
}
# getOuterNet

Redis 开机启动

安全删除文件 rm -rf

# 执行 rm 操作时会有二次确认提示，避免手抖造成重大操作事故。
vim ~/.bashrc
alias rm='read -p "请确认是否彻底删除?[输入 'y'/'Y' 进行确认，或者输入 'n'/'N' 取消。]" y && [ $y == "y" ] && rm -i'

保存退出后，在终端执行 source ~/.bashrc 使上面的修改生效。如仍未生效，重新连接服务即可。

登录执行 MySQL 文件/语句(密码免输入/免登录)

function executeSql(){
# 定义变量，用来保存数据库名
dbName=DB_NEW
# 注意事项，如果变量值是以特殊字符开头的，需要用"单引号"将其包起(见下)，若传递过来的以特殊字符开头的变量，则不用做特殊处理。
dbPwd='123456'  # 使用'单引号' 括起来是为了避免有特殊字符引起错误。
dbUser=$1
sqlFilePath=$2
mysql -u $dbUser -p$dbPwd --connect-expired-password <<EOF
     use $dbName; 
     source ${sqlFilePath}.sql;
 exit
EOF
}
# executeSql

复制当前服务器文件到远端服务器(密码免输入)

涉及知识点：sshpass

# 远端服务器的 ip
remoteIp=
# 远端服务器的端口
remotePort=
# 远端服务器的密码
remotePwd=
# 远端服务器保存文件的路径
remoteDirPath=
# 本服务器需要复制的文件路径
copyFilePath=
# 安装 sshpass 命令
yum -y install sshpass
#sshpass -p 远端服务器密码 scp -o StrictHostKeyChecking=no -P 远端服务器端口 -r 本地要拷贝的路径  root@远端服务器IP:远端服务器要保存的路径
sshpass -p ${remotePwd} scp -o StrictHostKeyChecking=no -P ${remotePort} -r ${copyFilePath}  root@${remoteIp}:${remoteDirPath}

复制远端服务器文件到当前服务器(密码免输入)

#sshpass -p 远端服务器密码 scp -o StrictHostKeyChecking=no -P 当前服务器的端口 -r 远端服务器的用户名@远端服务器IP：远端服务器要拷贝的文件路径 当前服务器要保存的路径
sshpass -p ${remotePwd} scp -o StrictHostKeyChecking=no -P ${localPort} -r  ${remoteUser}@${remoteIp}:${remoteDirPath}/*  ${localDirPath}/

启动 war 包

# 如果存在当前服务文件夹，则启动当前服务
function startWarServer() {
# 服务名称(new)
proServer=$1
if [ ! -d "${newBasePath}/${proServer}" ];then
 echo "没有该服务：[[ $proServer ]]，无需启动" >> $logPath
else
# echo "有该文件，$proServer ..."
 echo "$proServer 判断执行，... " >> $logPath
    numServer=`ps -aux | grep ${newBasePath}/${proServer}/bin | grep -v "grep" | wc -l`
    if [[ ${numServer} -lt 1 ]];then
 echo "${proServer}   `date "+%Y%m%d %T"` 没有启动 正在启动" >> $logPath
 cd ${newBasePath}/${proServer}
   ${newBasePath}/${proServer}/bin/startup.sh
 cd -
    else
 echo "${proServer} `date "+%Y%m%d %T"` 已启动" >> $logPath
    fi
    echo "$proServer 判断执行，end ... " >> $logPath
fi
}
# startWarServer 服务名
startWarServer ${pro_ftpServer}

启动 jar 包(限制内存启动)

# 调用 jar 包服务(限制内存启动)
JAVA_OPTS="-Xss512k -XX:MaxMetaspaceSize=1024M -XX:+DisableExplicitGC -XX:+UseConcMarkSweepGC -XX:+UseCMSCompactAtFullCollection -XX:+UseParNewGC -XX:+CMSParallelRemarkEnabled -XX:CMSInitiatingOccupancyFraction=75 -XX:ParallelGCThreads=4 -XX:+HeapDumpOnOutOfMemoryError";
function startJarServer() {
# 服务名称(new)
proServer=$1
# jar 包名称
jarName=$2
# 限制内存大小
limitXmx=$3
serverPath=${newBasePath}/${proServer}
echo "proServer=$1，jarName=$2，limitXmx=$3，serverPath=${newBasePath}/${proServer}" >> $logPath
if [ ! -d "${newBasePath}/${proServer}" ];then
 echo "没有该服务：[[ $proServer ]]，无需启动" >> $logPath
else
#num_MessageServer=`ps -aux | grep MessageServer.jar | grep -v "grep" | wc -l`
numServer=`ps -aux | grep ${newBasePath}/${proServer}/${jarName}.jar | grep -v "grep" | wc -l`
    if [[ ${numServer} -lt 1 ]];then
 echo "`date "+%Y%m%d %T"` [[[ ${proServer} ]]] 未启动，正在启动" >> $logPath
 cd ${newBasePath}/${proServer}
   nohup java -server -Xms512m -Xmx${limitXmx}G $JAVA_OPTS -XX:HeapDumpPath=/logs/${proServer}.dump  -jar ${newBasePath}/${proServer}/${jarName}.jar >/dev/null 2>&1 &
   cd -
    else
 echo "`date "+%Y%m%d %T"` [[ ${proServer} ]] 已启动" >> $logPath
    fi
 echo "execute_$proServer ，end ... " >> $logPath
fi
}
# startJarServer 服务名              jar 包名        占用的最大内存
startJarServer ${pro_httpServer}  ${httpServer_jarName}  1

清理 catalina.out 日志

# 检索所有的 catalina.out 日志文件并清理
function cleanLog(){
logFileList=`find / -name catalina.out`
for logFile in $logFileList
do
    echo "清理的文件为：$logFile，大小是：`du -sh $logFile`" 
    echo  "" > $logFile
done
}
# 调用
cleanLog

启动 redis

# 启动 redis
function start_redis(){
echo "function start_redis 开始执行 ... " >> $logPath
#    path=${oldBasePath}/redis
    path=${newBasePath}/redis
    redis_file=${path}/redis-server
    redis_conf=${path}/redis.conf
    #判断对应 redis 进程是否已经启动
    if `ps -ef | grep ${path} | grep -q redis-server`; then
        echo "Redis state is OK: `ps -ef | grep -v "grep" | grep ${path} | grep redis-server`"
        echo "redis 已经启动 ... " >> $logPath
        return
    fi
    _echo "--------------------------------------------------------"
    _echo "-------------starting Redis Server ------------"
    echo "redis 启动，开始 ... " >> $logPath
    cd ${path}
    _echo "changed to dir: `pwd`"
    echo "${redis_file} ${redis_conf} &"
  ${redis_file} ${redis_conf} &
  echo "redis 启动，完成 ... " >> $logPath
  cd -
  echo "start_redis 开始结束。 "
}

启动 kafka

function start_kafka_zookeeper(){
    #path=${oldBasePath}/kafka
    path=${newBasePath}/kafka
    zookeeper_start_file=${path}/bin/zookeeper-server-start.sh
    zookeeper_stop_file=${path}/bin/zookeeper-server-stop.sh
    zookeeper_cfg_file=${path}/config/zookeeper.properties
    #判断对应Kafka zookeeper进程是否已经启动
    # ps -ef | grep -v "grep"
    # ps -ef | grep -v "grep" | grep /MNT/ICC/dahua/fire/kafka
    # ps -ef | grep -v "grep" | grep /MNT/ICC/dahua/fire/kafka | grep -q "zookeeper.properties"
#    if `ps -ef | grep -v "grep" | grep /MNT/ICC/dahua/fire/kafka | grep -q "zookeeper.properties"`; then
    if `ps -ef | grep -v "grep" | grep ${path} | grep -q "zookeeper.properties"`; then
        echo "zookeeper state is OK: `ps -ef | grep -v "grep" | grep ${path} | grep "zookeeper.properties" | cut -f-20 -d" "`"
        return
    fi
        echo "--------------------------------------------------------"
        echo "-------------Starting Kafka Zookeeper------------"
        echo "启动 zookeeper 开始，... " >> $logPath
    cd ${path}
    nohup bin/zookeeper-server-start.sh config/zookeeper.properties &
    echo "启动 zookeeper 完成。。。" >> $logPath
  cd  -
    sleep 10
}
function start_kafka(){
    #path=${oldBasePath}/kafka
    path=${newBasePath}/kafka
    Kafka_start_file=${path}/bin/kafka-server-start.sh
    Kafka_stop_file=${path}/bin/kafka-server-stop.sh
    Kafka_cfg_file=${path}/config/server.properties
    #判断对应 kafka Server 进程是否已经启动
    if `ps -ef | grep ${path} | grep -q "kafka.Kafka"`; then
        echo "Kafka state is OK: `ps -ef | grep -v "grep" | grep ${path} | grep "kafka.Kafka"| cut -f-20 -d" "`"
        return
    fi
    echo "--------------------------------------------------------"
    echo "-------------starting Kafka Server ------------"
  echo "启动 Kafka 开始，... " >> $logPath
    cd ${path}
    nohup bin/kafka-server-start.sh config/server.properties &
    echo "启动 Kafka 完成 ... " >> $logPath
  cd  -
}

卸载 MySQL

#!/bin/bash
function removerMySQL(){
count=$(rpm -qa | grep mysql)
for x in $count
do
        rpm -e $x --nodeps
done
count1=$(find / -name mysql)
for i in $count1
do
        rm -rf $i
done
rm -rf /etc/my.cnf
rm -rf /var/log/mysqld.log
rm -rf /etc/my.cnf.rpmsave
rpm -qa|grep mysql
}
# 调用
removerMySQL

安装 MySQL

卸载和安装 MySQL

#!/bin/bash
# 此脚本未验证，方法可以参考
function verb(){
    echo "
    ############################################################################################
    #    ######     ######       #        #       #########       ##########        #           #
    #    #    #     #    #       #        #       #               #        #        #           #
    #    #     #   #     #       #        #       #               #        #        #           #   
    #    #      # #      #       ##########       #########       ##########        #           #
    #    #       #       #                #               #                #        #           #
    #    #               #                #               #                #        #           #
    #    #               #                #       #########                #        #########   #
    ############################################################################################
    "
    echo "
    ############################################################################################
    #     #              #         ##########       ##########          #             #########   #  
    #      #           #          #        #       #        #          #             #           #
    #       #        #           #        #       #        #          #             #           #
    #        #      #            ##########       #        #          #             #########   #
    #         #    #             #        #       #        #          #                     #   #
    #          #  #              #        #       #        #          #                     #   #
    #           ##               ##########       ##########          #             #########   #
    ############################################################################################         
    "
}
# 执行方法介绍
function explanation(){
    echo "
    ############################################################################################
                    脚本说明：脚本进行可进行传参执行
                    1---install_mysql          //安装mysql8.0.15
                    2---remove_mysql           //卸载当前服务器的mysql，一定要谨慎使用
    ############################################################################################
    "
}
# 卸载mysql方法
function remove_mysql(){
    count_mysql=`ps -ef|grep -e "mysql\|mysqld"|grep -v grep|wc -l`
    if [ $count_mysql -gt 1 ];then
        echo "本服务器上已经安装运行着mysql，是否需要卸载，一定要认真考虑！！！！！！"
        read -p "请问是否需要删除现在运行的mysql[yes|no]:" num
        if [ $num = 'yes'];then
            systemctl stop mysqld
            service mysql stop
            count_install_mysql=$(rpm -qa|grep -e "mysql\|mysqld")
            count_install_maindb=$(rpm -qa|grep "maindb")
            mysql_file=$(find / -name mysql*)
            for a in count_install_mysql
            do
                rpm -a $i --nodeps
            done
            for b in count_install_maindb
            do
                rpm -e $b --nodeps
            done
            for c in mysql_file
            do
                rm -rf $c
            done
            echo "卸载数据库完成"
        fi
    fi
}
# 安装mysql方法
function install_mysql(){
    msg=`df -k | awk '{print $6}'` ; for i in /opt/* ; do echo $msg | grep $i 1>/dev/null || du -sk $i ; done | sort -n
    file="$msg/opt"
    file1="$file/software"
    file2="/tmp/mysql.log"
    file3="/etc/my.cnf"
    hostname=`hostname`
    if [ ! -f $file];then
        mkdir -p $file
        if [ ! -f $file1 ];then
            mkdir -p $file1
            if [ ! -f $file2 ];then
                touch $file2
                chmod 666 $file2
        fi
    fi
    cd $file
    wget https://downloads.mysql.com/archives/get/p/23/file/mysql-8.0.15-el7-x86_64.tar.gz
    tar -xvf *.tar.gz
    mv *.tar.gz $file1
    mv mysql* mysql
    groupadd mysql
    useradd -r -g mysql mysql
    cd mysql
    chown -R mysql:mysql ./
    bin/mysql --initialize --user=mysql --basedir=$file --datadir=$file/datadir > $file2
    str=$(cat $file2)
    mysql_passwd=${str##*root@localhost:}
    # 当/etc/my.cnf不存在的时候需要手动创建对应的my-defalut.cnf文件并重命名
    if [ ! -f $file3 ];then
        touch my-defalut.cnf
        chmod 755 my-defalut.cnf
        cp my-defalut.cnf $file3
    fi
    # 修改对应的mysql配置文件
    echo "
    [mysqld]
    basedir=$file
    datadir=$file/data
    port=3306
    socket=/tmp/mysql.sock
    pid-file=$file/$hostname.pid
    sql_mode=NO_ENGINE_SUBSTITUTION.STRICT_TRANS_TABLES" >> file3
    # mysql启动脚本中修改对应的安装路径和对应的数据存储路径
    sed -i "s#basedir=#basedir=$file#g" $file/support-files
    sed -i "s#datadir=#datadir=$file/datadir#" $file/support-files
    cp $file/support-files/mysql.server /etc/init.d/mysql
    chmod +x /etc/init.d/mysql
    chkconfig --add mysql
    chkconfig --list  >> $file2
    # 该步骤一定需要核实，服务器重启，SELINUX=enforcing,会造成mysql无法启动
    sed -i "s#SELINUX=enforcing#SELINUX=disabled#g" /etc/selinux/config
    # 临时关闭selinux
    setenforce 0
    service mysql start
    count=$?
    if [ $count -eq 0 ];then
        echo "mysql数据库启动成功" >> $file3
    else
        tail -f /var/log/mysqld.log
        exit
    fi
    # 重制mysql root@localhost密码，创建root@%用户
    mysql -u root -p $mysql_passwd <<EOF
    alter user  'root'@'localhost' identified by '!Fzb_dahua2019';
    CREATE USER 'root'@'%' IDENTIFIED BY '!Fzb_dahua2019';
    GRANT ALL PRIVILEGES ON DATABASENAME.TABLENAME TO 'root'@'%';
    FLUSH PRIVILEGES;
    quit;
EOF
}
# 主方法
function main(){
    verb
    explanation
    read -p "输入需要执行操作【 1｜2 】：" num1
    case $num1 in 
        1|1)
            echo "欢迎进入安装mysql环节"
            install_mysql
            break
            ;;
        2|2)
            echo "欢迎进入卸载mysql环节，该步骤请慎重操作！！"
            remove_mysql
            break
            ;;
        *)
            echo "输入错误，请按照重新运行script"
            break
            ;;
    esac
}
#
main