定时备份逻辑:
1:定义备份的数据库
2:使用mysqldump备份
3:压缩备份sql脚本
4:删除10天前的备份数据
5:通过rsync同步到备份服务器
新增文件 mysql_backup.sh
#!/bin/bash # mysql_backup.sh: backup mysql databases and keep newest 5 days backup. # # ${db_user} is mysql username # ${db_password} is mysql password # ${db_host} is mysql host # ${db_port} is mysql port # —————————– #/root/mysql_backup.sh # everyday 3:00 AM execute database backup # 0 3 * * * /root/mysql_backup.sh #/etc/cron.daily db_user="root" db_password="123456" db_host="47.106.111.110" db_port="3306" # the directory for story your backup file. # backup_dir="/Host/backup/mysql/" # 要备份的数据库名 # #all_db="$(${mysql} -u ${db_user} -h ${db_host} -p${db_password} -Bse 'show databases')" # all_db="test" # 要保留的备份天数 # backup_day=10 #数据库备份日志文件存储的路径 logfile="/Host/backup/mysql_backup.log" ###ssh端口号### ssh_port=22 ###定义ssh auto key的文件### id_rsa=/root/auth_key/id_rsa_153.141.rsa ###定义ssh auto username### id_rsa_user=rsync ###定义要同步的远程服务器的目录路径(必须是绝对路径)### clientPath="/home/backup/mysql" ###定义要镜像的本地文件目录路径 源服务器(必须是绝对路径)### serverPath=${backup_dir} ###定义生产环境的ip### web_ip="192.168.0.2" # date format for backup file (dd-mm-yyyy) # time="$(date +"%Y-%m-%d")" # mysql, ${mysqldump} and some other bin's path # mysql="/usr/bin/mysql " mysqldump="/usr/bin/mysqldump" # the directory for story the newest backup # test ! -d ${backup_dir} && mkdir -p ${backup_dir} #备份数据库函数# mysql_backup() { # 取所有的数据库名 # for db in ${all_db} do echo "开始备份: "${db} backname=${db}.${time} dumpfile=${backup_dir}${backname} #将备份的时间、数据库名存入日志 echo "------"$(date +'%Y-%m-%d %T')" Beginning database "${db}" backup--------" >>${logfile} ${mysqldump} -F -u${db_user} -h${db_host} -P${db_port} -p${db_password} ${db} > ${dumpfile}.sql 2>>${logfile} 2>&1 #开始将压缩数据日志写入log echo $(date +'%Y-%m-%d %T')" Beginning zip ${dumpfile}.sql" >>${logfile} #将备份数据库文件库压成ZIP文件,并删除先前的SQL文件. # tar -czvf ${backname}.tar.gz ${backname}.sql 2>&1 && rm ${dumpfile}.sql 2>>${logfile} 2>&1 #将压缩后的文件名存入日志。 echo "backup file name:"${dumpfile}".tar.gz" >>${logfile} echo -e "-------"$(date +'%Y-%m-%d %T')" Ending database "${db}" backup-------\n" >>${logfile} done } delete_old_backup() { echo "delete backup file:" >>${logfile} # 删除旧的备份 查找出当前目录下七天前生成的文件,并将之删除 find ${backup_dir} -type f -mtime +${backup_day} | tee delete_list.log | xargs rm -rf cat delete_list.log >>${logfile} } rsync_mysql_backup() { # rsync 同步到其他Server中 # for j in ${web_ip} do echo "mysql_backup_rsync to ${j} begin at "$(date +'%Y-%m-%d %T') >>${logfile} ### 同步 ### rsync -avz --progress --delete $serverPath -e "ssh -p "${ssh_port}" -i "${id_rsa} ${id_rsa_user}@${j}:$clientPath >>${logfile} 2>&1 echo "mysql_backup_rsync to ${j} done at "$(date +'%Y-%m-%d %T') >>${logfile} done } #进入数据库备份文件目录 cd ${backup_dir} mysql_backup delete_old_backup # rsync_mysql_backup echo -e "========================mysql backup && rsync done at "$(date +'%Y-%m-%d %T')"============================\n\n">>${logfile} cat ${logfile}
通过 crontab 实现定时:
0 3 * * * /home/tioncico/mysql_backup.sh
每天3点0分进行备份
ps:
// 安装rsync工具(备份服务器和远程服务器都需要安装)
yum -y install rsync
// id_ras.pub 用于远程服务器,id_rsa用于本地备份服务器
// 生成密钥 (ssh-keygen - jack088的个人页面 - OSCHINA - 中文开源技术交流社区)
ssh-keygen -t rsa -b 1024 -f yourkeyname -C "备注"
touch ~/.ssh/authorized_keys
cat id_rsa.pub >> ~/.ssh/authorized_keys
chmod 600 ~/.ssh/authorized_keys
chmod 700 ~/.ssh
// cron服务(https://blog.csdn.net/u012569217/article/details/78909309)
systemctl start crond
启动cron服务
systemctl stop crond
停止cron服务
systemctl restart crond
重启cron服务
systemctl enable crond.service
设置cron开机启动
查看当前crontab,输入 crontab -l
编辑当前crontab,输入 crontab -e
删除当前crontab,输入 crontab -r
添加定时任务
crontab -e
0 */1 * * * command
0 */2 * * * command
查询任务是否添加:
crontab -l -u root
#查看root用户