香港服务器
26.08.2024
如何在多台主机上执行远程命令?
1. MySQL主从同步监控
此脚本监控MySQL主从同步状态,并在检测到任何异常时发送电子邮件警报:
#!/bin/bash
HOST=localhost
USER=root
PASSWD=123.com
IO_SQL_STATUS=$(mysql -h$HOST -u$USER -p$PASSWD -e 'show slave status\G' 2>/dev/null |awk '/Slave_.*_Running:/{print $1$2}')
for i in $IO_SQL_STATUS; do
THREAD_STATUS_NAME=${i%:*}
THREAD_STATUS=${i#*:}
if [ "$THREAD_STATUS" != "Yes" ]; then
echo "Error: MySQL Master-Slave $THREAD_STATUS_NAME status is $THREAD_STATUS!" |mail -s "Master-Slave Staus" xxx@163.com
fi
done2. 实时目录监控和文件同步
此脚本监控指定目录的变化并实时同步文件:
#!/bin/bash
MON_DIR=/opt
inotifywait -mqr --format %f -e create $MON_DIR |\
while read files; do
rsync -avz /opt /tmp/opt
#echo "$(date +'%F %T') create $files" | mail -s "dir monitor" xxx@163.com
done3. 批量创建用户并设置密码
此脚本可以创建多个用户并生成随机密码:
#!/bin/bash
DATE=$@
USER_FILE=user.txt
for USER in $USER_LIST; do
if ! id $USER &>/dev/null; then
PASS=$(echo $RANDOM |md5sum |cut -c 1-8)
useradd $USER
echo $PASS |passwd --stdin $USER &>/dev/null
echo "$USER $PASS" >> $USER_FILE
echo "$USER User create successful."
else
echo "$USER User already exists!"
fi
done4. 批量检查网站可用性
此脚本检查多个网站的可用性并报告任何访问失败:
#!/bin/bash
URL_LIST="www.baidu.com www.ctnrs.com"
for URL in $URL_LIST; do
FAIL_COUNT=0
for ((i=1;i<=3;i++)); do
HTTP_CODE=$(curl -o /dev/null --connect-timeout 3 -s -w "%{http_code}" $URL)
if [ $HTTP_CODE -eq 200 ]; then
echo "$URL OK"
break
else
echo "$URL retry $FAIL_COUNT"
let FAIL_COUNT++
fi
done
if [ $FAIL_COUNT -eq 3 ]; then
echo "Warning: $URL Access failure!"
fi
done5. 在多台主机上执行远程命令
此脚本允许在多台远程主机上执行命令:
#!/bin/bash
COMMAND=$*
HOST_INFO=host.info
for IP in $(awk '/^[^#]/{print $1}' $HOST_INFO); do
USER=$(awk -v ip=$IP 'ip==$1{print $2}' $HOST_INFO)
PORT=$(awk -v ip=$IP 'ip==$1{print $3}' $HOST_INFO)
PASS=$(awk -v ip=$IP 'ip==$1{print $4}' $HOST_INFO)
expect -c "
spawn ssh -p $PORT $USER@$IP
expect {
\"(yes/no)\" {send \"yes\r\"; exp_continue}
\"password:\" {send \"$PASS\r\"; exp_continue}
\"$USER@*\" {send \"$COMMAND\r exit\r\"; exp_continue}
}
"
echo "-------------------"
done6. 一键部署LNMP网站平台脚本
此脚本允许一键部署LNMP(Linux, Nginx, MySQL, PHP)网站平台:
#!/bin/bash
NGINX_V=1.15.6
PHP_V=5.6.36
TMP_DIR=/tmp
INSTALL_DIR=/usr/local
PWD_C=$PWD
echo
echo -e "\t菜单\n"
echo -e "1. 安装Nginx"
echo -e "2. 安装PHP"
echo -e "3. 安装MySQL"
echo -e "4. 部署LNMP"
echo -e "9. 退出"
function command_status_check() {
if [ $? -ne 0 ]; then
echo $1
exit
fi
}
function install_nginx() {
cd $TMP_DIR
yum install -y gcc gcc-c++ make openssl-devel pcre-devel wget
wget http://nginx.org/download/nginx-${NGINX_V}.tar.gz
tar zxf nginx-${NGINX_V}.tar.gz
cd nginx-${NGINX_V}
./configure --prefix=$INSTALL_DIR/nginx \
--with-http_ssl_module \
--with-http_stub_status_module \
--with-stream
command_status_check "Nginx - 环境检查失败!"
make -j 4
command_status_check "Nginx - 编译失败!"
make install
command_status_check "Nginx - 安装失败!"
mkdir -p $INSTALL_DIR/nginx/conf/vhost
alias cp=cp ; cp -rf $PWD_C/nginx.conf $INSTALL_DIR/nginx/conf
rm -rf $INSTALL_DIR/nginx/html/*
echo "ok" > $INSTALL_DIR/nginx/html/status.html
echo '' > $INSTALL_DIR/nginx/html/status.php
$INSTALL_DIR/nginx/sbin/nginx
command_status_check "Nginx - 启动失败!"
}
function install_php() {
cd $TMP_DIR
yum install -y gcc gcc-c++ make gd-devel libxml2-devel \
libcurl-devel libjpeg-devel libpng-devel openssl-devel \
libmcrypt-devel libxslt-devel libtidy-devel
wget http://docs.php.net/distributions/php-${PHP_V}.tar.gz
tar zxf php-${PHP_V}.tar.gz
cd php-${PHP_V}
./configure --prefix=$INSTALL_DIR/php \
--with-config-file-path=$INSTALL_DIR/php/etc \
--enable-fpm --enable-opcache \
--with-mysql --with-mysqli --with-pdo-mysql \
--with-openssl --with-zlib --with-curl --with-gd \
--with-jpeg-dir --with-png-dir --with-freetype-dir \
--enable-mbstring --enable-hash
command_status_check "PHP - 环境检查失败!"
make -j 4
command_status_check "PHP - 编译失败!"
make install
command_status_check "PHP - 安装失败!"
cp php.ini-production $INSTALL_DIR/php/etc/php.ini
cp sapi/fpm/php-fpm.conf $INSTALL_DIR/php/etc/php-fpm.conf
cp sapi/fpm/init.d.php-fpm /etc/init.d/php-fpm
chmod +x /etc/init.d/php-fpm
/etc/init.d/php-fpm start
command_status_check "PHP - 启动失败!"
}
read -p "请输入一个数字: " number
case $number in
1)
install_nginx;;
2)
install_php;;
3)
install_mysql;;
4)
install_nginx
install_php
;;
9)
exit;;
esac7. 一键检查服务器资源使用情况
此脚本提供服务器资源使用情况的全面概览,包括CPU、内存、磁盘和TCP连接状态:
#!/bin/bash
function cpu() {
NUM=1
while [ $NUM -le 3 ]; do
util=`vmstat |awk '{if(NR==3)print 100-$15"%"}'`
user=`vmstat |awk '{if(NR==3)print $13"%"}'`
sys=`vmstat |awk '{if(NR==3)print $14"%"}'`
iowait=`vmstat |awk '{if(NR==3)print $16"%"}'`
echo "CPU - 使用率: $util , IO等待: $iowait"
let NUM++
sleep 1
done
}
function memory() {
total=`free -m |awk '{if(NR==2)printf "%.1f",$2/1024}'`
used=`free -m |awk '{if(NR==2) printf "%.1f",($2-$NF)/1024}'`
available=`free -m |awk '{if(NR==2) printf "%.1f",$NF/1024}'`
echo "内存 - 总计: ${total}G , 已用: ${used}G , 可用: ${available}G"
}
function disk() {
fs=$(df -h |awk '/^\/dev/{print $1}')
for p in $fs; do
mounted=$(df -h |awk '$1=="'$p'"{print $NF}')
size=$(df -h |awk '$1=="'$p'"{print $2}')
used=$(df -h |awk '$1=="'$p'"{print $3}')
used_percent=$(df -h |awk '$1=="'$p'"{print $5}')
echo "磁盘 - 挂载点: $mounted , 总大小: $size , 已用: $used , 使用率: $used_percent"
done
}
function tcp_status() {
summary=$(ss -antp |awk '{status[$1]++}END{for(i in status) printf i":"status[i]" "}')
echo "TCP连接状态 - $summary"
}
cpu
memory
disk
tcp_status8. 查找高CPU和内存使用进程的脚本
这些命令帮助识别消耗CPU和内存资源最多的进程:
ps -eo user,pid,pcpu,pmem,args --sort=-pcpu |head -n 10
ps -eo user,pid,pcpu,pmem,args --sort=-pmem |head -n 109. 自动化Java项目部署(Tomcat)
此脚本自动化了将Java项目部署到Tomcat服务器的过程,包括代码拉取、构建和部署:
#!/bin/bash
DATE=$(date +%F_%T)
TOMCAT_NAME=$1
TOMCAT_DIR=/usr/local/$TOMCAT_NAME
ROOT=$TOMCAT_DIR/webapps/ROOT
BACKUP_DIR=/data/backup
WORK_DIR=/tmp
PROJECT_NAME=tomcat-java-demo
# 拉取代码
cd $WORK_DIR
if [ ! -d $PROJECT_NAME ]; then
git clone https://github.com/lizhenliang/tomcat-java-demo
cd $PROJECT_NAME
else
cd $PROJECT_NAME
git pull
fi
# 构建
mvn clean package -Dmaven.test.skip=true
if [ $? -ne 0 ]; then
echo "maven构建失败!"
exit 1
fi
# 部署
TOMCAT_PID=$(ps -ef |grep "$TOMCAT_NAME" |egrep -v "grep|$$" |awk 'NR==1{print $2}')
[ -n "$TOMCAT_PID" ] && kill -9 $TOMCAT_PID
[ -d $ROOT ] && mv $ROOT $BACKUP_DIR/${TOMCAT_NAME}_ROOT$DATE
unzip $WORK_DIR/$PROJECT_NAME/target/*.war -d $ROOT
$TOMCAT_DIR/bin/startup.sh10. 自动化PHP项目部署脚本
此脚本简化了PHP项目的部署,处理代码检索并部署到指定的Web根目录:
#!/bin/bash
DATE=$(date +%F_%T)
WWWROOT=/usr/local/nginx/html/$1
BACKUP_DIR=/data/backup
WORK_DIR=/tmp
PROJECT_NAME=php-demo
# 拉取代码
cd $WORK_DIR
if [ ! -d $PROJECT_NAME ]; then
git clone https://github.com/lizhenliang/php-demo
cd $PROJECT_NAME
else
cd $PROJECT_NAME
git pull
fi
# 部署
if [ ! -d $WWWROOT ]; then
mkdir -p $WWWROOT
rsync -avz --exclude=.git $WORK_DIR/$PROJECT_NAME/* $WWWROOT
else
rsync -avz --exclude=.git $WORK_DIR/$PROJECT_NAME/* $WWWROOT
fi这些额外的Shell脚本补充了之前的集合,涵盖了系统管理的关键方面,如资源监控、备份、日志管理、安全更新和网络扫描。将这些脚本纳入您的日常工作中,可以显著提高效率并维护更健壮和安全的系统基础设施。
请记住查看并自定义这些脚本以适应您的特定环境和需求。定期测试和更新对确保它们持续有效至关重要。有了这些强大的工具,您将能够轻松精确地处理各种系统管理任务。
