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Mysql 自动备份脚本安全加锁机制
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‎Nginx-Rtmp/Shell_script.md

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#Exec
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main $1
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```
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```
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‎Nginx-Rtmp/backup_mysql.sh

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#!/bin/bash
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#######################################################
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# $Name: mysql_backup.sh
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# $Version: v1.0
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# $Function: Backup MySQL Databases Script
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# $Author: ShaoBo Wan (Tinywan)
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# $organization: https://github.com/Tinywan
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# $Create Date: 2017-06-29
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# $Description: Mysql 自动备份脚本安全加锁机制
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#######################################################
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# Shell Env
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SHELL_NAME="mysql_backup.sh"
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SHELL_TIME=$(date "+%Y-%m-%d")
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SHELL_DIR="/home/www/database_back"
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SHELL_LOG="${SHELL_DIR}/${SHELL_NAME}-${SHELL_TIME}.log"
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LOCK_FILE="/tmp/${SHELL_NAME}.lock"
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MYSQL_DUMP="/usr/bin/mysqldump"
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MYSQL_BACKUP_DB_NAME="tinywan_mysql"
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BACKUP_NAME=${MYSQL_BACKUP_DB_NAME}"-${SHELL_TIME}.sql"
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# Write Log
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loglevel=0 #debug:0; info:1; warn:2; error:3
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TIME=`date '+%Y-%m-%d %H:%M:%S'`
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shell_log(){
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local log_type=$1
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local LOG_CONTENT=$2
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logformat="`date '+%Y-%m-%d %H:%M:%S'` \t[${log_type}]\t [${SHELL_NAME}] Function: ${FUNCNAME[@]}\t[line:`caller 0 | awk '{print$1}'`]\t [log_info: ${LOG_CONTENT}]"
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{
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case $log_type in
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debug)
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[[ $loglevel -le 0 ]] && echo -e "\033[34m${logformat}\033[0m" ;;
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info)
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[[ $loglevel -le 1 ]] && echo -e "\033[32m${logformat}\033[0m" ;;
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warn)
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[[ $loglevel -le 2 ]] && echo -e "\033[33m${logformat}\033[0m" ;;
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error)
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[[ $loglevel -le 3 ]] && echo -e "\033[31m${logformat}\033[0m" ;;
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esac
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} | tee -a $SHELL_LOG
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}
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shell_usage(){
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echo $"Usage: $0 {backup}"
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}
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shell_lock(){
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touch ${LOCK_FILE}
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}
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shell_unlock(){
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rm -f ${LOCK_FILE}
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}
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mysql_zip(){
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cd $SHELL_DIR
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/bin/bzip2 $BACKUP_NAME
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find ./ -mindepth 1 -maxdepth 3 -type f -name *.bz2 -mmin +43200 | xargs rm -rf
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find ./ -mindepth 1 -maxdepth 3 -type f -name *.sql -mmin +1440 | xargs rm -rf
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find ./ -mindepth 1 -maxdepth 3 -type f -name *.log -mmin +1440 | xargs rm -rf
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}
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# Backup MySQL weblive Database with mysqldump or innobackupex
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mysql_backup(){
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if [ -f "$LOCK_FILE" ];then
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shell_log warn "${SHELL_NAME} is running"
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exit 1
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fi
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shell_log info "mysql backup start"
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shell_lock
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#sleep 10
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BACKUP_RES=$($MYSQL_DUMP $MYSQL_BACKUP_DB_NAME > $SHELL_DIR/$BACKUP_NAME && echo "success" || echo "fail")
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if [ "${BACKUP_RES}" == "fail" ];then
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shell_log error "MYSQL_BACKUP_DB error : ${BACKUP_RES}"
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shell_unlock
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exit 1
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fi
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mysql_zip
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shell_log info "mysql backup stop"
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shell_unlock
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}
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# Main Function
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main(){
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case $1 in
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backup) mysql_backup
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;;
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*) shell_usage
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;;
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esac
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}
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#Exec
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main $1

‎Nginx-Rtmp/shell_usage.sh

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#######################################################
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# Shell Env
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SHELL_NAME="backup_db.sh"
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SHELL_NAME="test.sh"
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SHELL_TIME=$(date "+%Y-%m-%d")
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SHELL_DIR="/home/www/database_back"
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SHELL_LOG="${SHELL_DIR}/${SHELL_NAME}.log"
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SHELL_LOG="${SHELL_DIR}/${SHELL_NAME}-${SHELL_TIME}.log"
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LOCK_FILE="/tmp/${SHELL_NAME}.lock"
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BACKUP_NAME="${SHELL_DIR}/${SHELL_NAME}.log"
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MYSQL_DUMP="/usr/bin/mysqldump"
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MYSQL_BACKUP_DB_NAME="weblive"
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BACKUP_NAME=${MYSQL_BACKUP_DB_NAME}"-${SHELL_TIME}.sql"
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#Write Log
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#设置日志级别
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loglevel=0 #debug:0; info:1; warn:2; error:3
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TIME=`date '+%Y-%m-%d %H:%M:%S'`
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shell_log(){
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LOG_INFO=$1
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echo "$(date "+%Y-%m-%d") $(date "+%H-%M-%S") : ${SHELL_NAME} : ${LOG_INFO}" >> ${SHELL_LOG}
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local log_type=$1
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local LOG_CONTENT=$2
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# 这里的写入日志时间修改掉，经过一段时间的测试${TIME} 每次都是一个固定的时间，所以在这里修改为每次写入是自动获取当前时间写入日志
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logformat="`date '+%Y-%m-%d %H:%M:%S'` \t[${log_type}]\t [${SHELL_NAME}] Function: ${FUNCNAME[@]}\t[line:`caller 0 | awk '{print$1}'`]\t [log_info: ${LOG_CONTENT}]"
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{
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case $log_type in
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debug)
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[[ $loglevel -le 0 ]] && echo -e "\033[34m${logformat}\033[0m" ;;
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info)
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[[ $loglevel -le 1 ]] && echo -e "\033[32m${logformat}\033[0m" ;;
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warn)
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[[ $loglevel -le 2 ]] && echo -e "\033[33m${logformat}\033[0m" ;;
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error)
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[[ $loglevel -le 3 ]] && echo -e "\033[31m${logformat}\033[0m" ;;
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esac
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} | tee -a $SHELL_LOG
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}
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# Shell Usage shell_usage函数，用来告诉用户，这个脚本的使用方法
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shell_usage(){
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echo $"Usage: $0 {backup}"
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#echo $"Usage: $0 {backup}"
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echo '你没有输入 1 到 4 之间的数字'
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}
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# 函数shell_lock和shell_unlock非常简单，就是创建一个锁文件
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rm -f ${LOCK_FILE}
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}
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# Backup MySQL All Database with mysqldump or innobackupex
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# Backup MySQL weblive Database with mysqldump or innobackupex
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mysql_backup(){
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if [ -f "$LOCK_FILE" ];then
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shell_log "${SHELL_NAME} is running"
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shell_log "mysql backup start"
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shell_lock
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sleep 10
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$MYSQL_DUMP $MYSQL_BACKUP_DB_NAME > $SHELL_DIR/$BACKUP_NAME
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cd $SHELL_DIR
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/bin/bzip2 $BACKUP_NAME
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shell_log "mysql backup stop"
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shell_unlock
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}
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# Main Function
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main(){
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case $1 in
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backup)
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mysql_backup
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;;
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*)
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shell_usage;
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1) echo '你选择了 1'
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;;
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2) echo '你选择了 2'
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;;
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3) echo '你选择了 3'
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;;
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4) echo '你选择了 4'
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;;
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*) shell_usage
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;;
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esac
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}
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main2(){
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case $1 in
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backup) mysql_backup
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;;
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*) shell_usage
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;;
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esac
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}
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#Exec
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main $1
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main $1
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database=weblive
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databak_dir=/home/www/database_back
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logs_dir=/home/www/database_back/logs
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dumpbin=/usr/bin/mysqldump
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DATE=$(date +%Y%m%d)
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date_time=$(date +"%y-%m-%d %H:%M:%S")
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backup_name=sansan_bak1_${DATE}.sql
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logFile=$logs_dir/sansan_${DATE}.log
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echo " " > $logFile
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echo "-------------$(date +"%y-%m-%d %H:%M:%S") backup start ----------------------" >> $logFile
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$MYSQL_DUMP $MYSQL_BACKUP_NAME >$databak_dir/$backup_name
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cd $databak_dir
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/bin/bzip2 $backup_name
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# 1 mouth = 44640 min
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find ./ -mindepth 1 -maxdepth 3 -type f -name *.bz2 -mmin +43200 | xargs rm -rf
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find ./ -mindepth 1 -maxdepth 3 -type f -name *.sql -mmin +1440 | xargs rm -rf
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echo "-------------$(date +"%y-%m-%d %H:%M:%S") backup end ----------------------" >> $logFile
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FFMPEG_JPG=$(/usr/bin/ffmpeg -y -ss 00:00:10 -i ${FULL_NAME} -vframes 1 ${DIR_NAME}/${BASE_NAME}.jpg && echo "success" || echo "fail")

‎README.md

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- [x] Shell脚本实现分日志级别记录日志
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- [x] Nginx日志定时备份和删除
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- [x] SHELL脚本小技巧
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- [x] Mysql 自动备份脚本安全加锁机制
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+ [Lua基础知识](#Lua_base_knowledge)
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+ [Lua 基础语法](#Lua-base)
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+ [luajit 执行文件默认安装路径](#Nginx_base_knowledge)
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+ [shell脚本实现分日志级别记录日志](https://github.com/Tinywan/Lua-Nginx-Redis/blob/master/Nginx-Rtmp/Shell_Log.sh)
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+ [Nginx日志定时备份和删除](https://github.com/Tinywan/Lua-Nginx-Redis/blob/master/Nginx-Rtmp/Shell_Nginx_Log_cut.sh)
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+ [SHELL脚本小技巧](https://github.com/Tinywan/Lua-Nginx-Redis/blob/master/Nginx-Rtmp/Shell_script.md)
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+ [Mysql 自动备份脚本安全加锁机制](https://github.com/Tinywan/Lua-Nginx-Redis/blob/master/Nginx-Rtmp/backup_mysql.sh)
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## <a name="Lua_base_knowledge"/> Lua基础知识
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#### Lua 基础语法 <a name="Lua-base"/>
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+ 删除一个全局变量，只要将变量值赋值为nil：`a = nil`,当且仅当一个变量不为nil 时，这个变量存在

‎Shell/write-shell-suggestions.md

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### 编写快速安全Bash脚本的建议
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+ [编写快速安全 Bash 脚本的建议 ](https://www.oschina.net/translate/bash-scripting-quirks-safety-tips)
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+ 变量赋值
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+ Bash变量并不要求全部大写，但是通常是大写的
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+ 变量赋值不要在`=`运算符的两边放置空格符

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