mysql全量+增量备份脚本

cat xtrabackup_mysql.sh

#!/bin/bash
#title       :xtrabackup_mysql.sh
#description :backup mysql by using xtrabackup
#author      :weavepub
#date        :20190529
#version     :1.0
#crontab     :0 */2 * * * sh /usr/local/bin/xtrabackup_mysql.sh >>/opt/log/xtrabackup_mysql.out 2>&1
OFDAY="`date "+%u"`"
LASTWEEKENDDAY="`date -d '-'$OFDAY' day' "+%Y-%m-%d"`"
TODAY="`date +%Y-%m-%d`"
HOST="localhost"
PORT=""
BACKUP_USER="root"
BACKUP_PWD=""
FULLBACKUP_DIR="/opt/mysqlbackup/xtrabackup/fullbackup/"
INCREMENTAL_DIR="/opt/mysqlbackup/xtrabackup/incremental/"
LOG_FILE="/opt/log/xtrabackup_mysql.sh.log"
log(){
    msg=$1
    now=`date "+%Y-%m-%d %H:%M:%S"`
    echo $now $msg >>$LOG_FILE
}
fullbackup(){
    res=$(find $FULLBACKUP_DIR -type d -name $TODAY*)
    if [ "$res" = "" ];then
        log "start fullbackup"
        innobackupex --host ${HOST} --port ${PORT} --user=${BACKUP_USER} --password=${BACKUP_PWD} ${FULLBACKUP_DIR}
    else
        log "already fullbackup today"
    fi
}

incrementalbackup(){
    if [ $# -lt 1 ];then
        log "using: incrementalbackup fullbackup_time[2016-09-25]"
        return 1
    fi
    FULLBACKUP_TIME=$1
    LAST_FULLBACKUP_DIR=$(find $FULLBACKUP_DIR -type d -name $FULLBACKUP_TIME*)
    log "LAST_FULLBACKUP_DIR:"$LAST_FULLBACKUP_DIR
    if [ "$LAST_FULLBACKUP_DIR" = "" ];then
        log "LAST_FULLBACKUP not found"
        return 1
    fi
    if [ -d ${LAST_FULLBACKUP_DIR} ];then
        log "start incremental backup"
        innobackupex --host=${HOST} --port=${PORT} --user=${BACKUP_USER} --password=${BACKUP_PWD} --incremental ${INCREMENTAL_DIR} --incremental-basedir=$LAST_FULLBACKUP_DIR
    else
        log "LAST_FULLBACKUP not found"
    fi
}

clean_full_backup(){
### clean mysql fullbackup file,please only run weekend

OLDEST_DAY=$(date -d '1 week ago' -I)
OLDEST_TIMESTAMP=$(date -d "$OLDEST_DAY" +%s)

    if [ -d $FULLBACKUP_DIR ];then
        cd $FULLBACKUP_DIR
        for DIR in *
        do
            DAY=${DIR%%_*}
            TIMESTAMP=$(date -d "$DAY" +%s)
            if [ $TIMESTAMP -lt $OLDEST_TIMESTAMP ];then
                rm -rf $DIR
                log "clean dir $FULLBACKUP_DIR/$DIR"
            fi
        done
    fi
}

clean_incremental_backup(){
### clean mysql incremental backup file,please only run everyday

OLDEST_DAY=$(date -d '1 day ago' -I)
OLDEST_TIMESTAMP=$(date -d "$OLDEST_DAY" +%s)

    if [ -d $INCREMENTAL_DIR ];then
        cd $INCREMENTAL_DIR
        for DIR in *
        do
            DAY=${DIR%%_*}
            TIMESTAMP=$(date -d "$DAY" +%s)
            if [ $TIMESTAMP -lt $OLDEST_TIMESTAMP ];then
                rm -rf $DIR
                log "clean dir $INCREMENTAL_DIR/$DIR"
            fi
        done
    fi
}

main(){
    if [ ! -d $FULLBACKUP_DIR ];then
        mkdir -p $FULLBACKUP_DIR
    fi
    if [ ! -d $INCREMENTAL_DIR ];then
        mkdir -p $INCREMENTAL_DIR
    fi
    if [ "$OFDAY" = "" ];then
        fullbackup
        clean_full_backup
    else
       incrementalbackup $LASTWEEKENDDAY
       clean_incremental_backup
    fi
}
main

crontab -e

#xtrabackup
0 */2 * * * sh /opt/mysqlbackup/scripts/xtrabackup_mysql.sh >>/opt/log/xtrabackup_mysql.out 2>&1