吉林系统建站怎么用衡水做网站技术

配置密码

cat >> /root/.my.cnf <<"EOF"
[client]
user=root
password=YourPassword
EOF

编写备份脚本

cat > /usr/local/bin/mysql_dump.sh <<"EOF"
#!/bin/bashDATE=$(date +%F_%H-%M-%S)
BACKUP_DIR="/data/mysql_backups"
LOG_DIR="/var/log/mysql_backup"
LOG_FILE="$LOG_DIR/backup_$DATE.log"mkdir -p "$BACKUP_DIR" "$LOG_DIR"{echo "=== MySQL Backup started at $(date) ==="# 获取 MySQL 主版本号，例如 8.0、8.4MYSQL_VERSION=$(mysql -V | awk '{print $3}' | cut -d. -f1,2)# 判断是否使用 source-data（MySQL >= 8.4）MAJOR=$(echo "$MYSQL_VERSION" | cut -d. -f1)MINOR=$(echo "$MYSQL_VERSION" | cut -d. -f2)if [ "$MAJOR" -ge 9 ] || { [ "$MAJOR" -eq 8 ] && [ "$MINOR" -ge 4 ]; }; thenecho "Detected MySQL version $MYSQL_VERSION, using --source-data=2"DATA_OPT="--source-data=2"elseecho "Detected MySQL version $MYSQL_VERSION, using --master-data=2"DATA_OPT="--master-data=2"fimysqldump --defaults-extra-file=/root/.my.cnf \--all-databases \--single-transaction \--host=127.0.0.1 \$DATA_OPT \--routines \--events \--triggers \| gzip > "$BACKUP_DIR/all_backup_$DATE.sql.gz"if [ $? -eq 0 ]; thenecho "=== Backup SUCCESSFUL at $(date) ==="elseecho "=== Backup FAILED at $(date) ==="fi# 清理7天前的旧备份和日志find "$LOG_DIR" -name "backup_*.log" -mtime +7 -deletefind "$BACKUP_DIR" -name "all_backup_*.sql.gz" -mtime +7 -delete} >> "$LOG_FILE" 2>&1EOF

配置权限

chmod +x /usr/local/bin/mysql_dump.sh

定时任务配置

cat >> /etc/crontab <<"EOF"
0 1 * * * root flock -xn /tmp/mysq_dump.lock -c /usr/local/bin/mysql_dump.sh
EOF

注意这里的 root 别忘记了, 我实际测试的时候发现没有 root 就没有执行生效

检查效果

1. 手动执行

flock -xn /tmp/mysq_dump.lock -c /usr/local/bin/mysql_dump.sh

2.修改定时任务触发时间验证

如果不想保留明文密码

手工配置备份密码

mysql_config_editor set --login-path=backup --user=root  --password

修改备份命令

将 
mysqldump --defaults-extra-file=/root/.my.cnf \--all-databases \--single-transaction \$DATA_OPT \--routines \--events \--triggers \| gzip > "$BACKUP_DIR/all_backup_$DATE.sql.gz"
改为 
mysqldump  mysqldump --login-path=backup \--all-databases \--single-transaction \$DATA_OPT \--routines \--events \--triggers \| gzip > "$BACKUP_DIR/all_backup_$DATE.sql.gz"