binlog server

说明：有时候备份会选择全备+binlog 那么你们的binlog都是怎么备份的？
mysql 5.6以后，可以利用mysqlbinlog 把远程机器的日志备份到本地目录 从而达到增量或是日志安全的增量备份。
环境：
mysql-5.7.16
centos 6.7

172.16.11.187：binlog server（收集binlog的数据库服务器）
172.16.11.188 ： 需要备份binlog的数据库所在机器


利用mysqlbinlog将远程binlog文件传到binlogserver上
187：mysqlbinlog -R --raw --host=172.16.11.188 --user='root' --password='123456' -P 3306 --stop-never mysql-bin.000005 （执行命令是所在路径是/root）a


188：mysql> show binary logs;
+------------------+-----------+
| Log_name | File_size |
+------------------+-----------+
| mysql-bin.000001 |177 |
| mysql-bin.000002 |426 |
| mysql-bin.000003 |9688778 |
| mysql-bin.000004 |177 |
| mysql-bin.000005 |201 |
| mysql-bin.000006 |154 |
+------------------+-----------+
6 rows in set (0.00 sec)


mysql> flush logs;
Query OK, 0 rows affected (0.01 sec)


mysql> flush logs;
Query OK, 0 rows affected (0.00 sec)


mysql> flush logs;
Query OK, 0 rows affected (0.00 sec)


mysql> flush logs;
Query OK, 0 rows affected (0.00 sec)


mysql> show binary logs;
+------------------+-----------+
| Log_name | File_size |
+------------------+-----------+
| mysql-bin.000001 |177 |
| mysql-bin.000002 |426 |
| mysql-bin.000003 |9688778 |
| mysql-bin.000004 |177 |
| mysql-bin.000005 |201 |
| mysql-bin.000006 |201 |
| mysql-bin.000007 |201 |
| mysql-bin.000008 |201 |
| mysql-bin.000009 |201 |
| mysql-bin.000010 |154 |
+------------------+-----------+
10 rows in set (0.00 sec)


在binlog server上查看在188上flush log 新增的binlog有没有过来：
[root@ces1 ~]# ls -lrth
total 9.4M
-rw-r----- 1 root root 201 Aug 14 15:25 mysql-bin.000005
-rw-r----- 1 root root 201 Aug 14 15:31 mysql-bin.000006
-rw-r----- 1 root root 201 Aug 14 15:31 mysql-bin.000007
-rw-r----- 1 root root 201 Aug 14 15:31 mysql-bin.000008
-rw-r----- 1 root root 123 Aug 14 15:31 mysql-bin.000010
-rw-r----- 1 root root 201 Aug 14 15:31 mysql-bin.000009
-rw-r----- 1 root root 201 Aug 14 15:33 mysql-bin.000015
-rw-r----- 1 root root 201 Aug 14 15:33 mysql-bin.000016
-rw-r----- 1 root root 123 Aug 14 15:33 mysql-bin.000018
-rw-r----- 1 root root 201 Aug 14 15:33 mysql-bin.000017
发现binlog 已经过来了。
拓展：一般的主从复制，如果主从连接停止了，会自动尝试连接，binlogserver如果停止了并不会自动尝试连接。
利用脚本来解决这个问题：
binlog_remote.sh
#!/bin/sh
BACKUP_BIN=/tmp/mysqlbinlog
LOCAL_BACKUP_DIR=/data/db/binlog_backup
BACKUP_LOG=/data/db/binlog_backup/backuplog
REMOTE_HOST=172.16.11.188
REMOTE_PORT=3306
REMOTE_USER=root
REMOTE_PASS=123456
FIRST_BINLOG=mysql-bin.000001
#time to wait before reconnecting after failure
SLEEP_SECONDS=10
##create local_backup_dir if necessary
mkdir -p ${LOCAL_BACKUP_DIR}
cd ${LOCAL_BACKUP_DIR}
## 运行while循环，连接断开后等待指定时间，重新连接
while :
do
if [ `ls -A "${LOCAL_BACKUP_DIR}" |wc -l` -eq 0 ];then
LAST_FILE=${FIRST_BINLOG}
else
LAST_FILE=`ls -l ${LOCAL_BACKUP_DIR} | grep -v backuplog |tail -n 1 |awk '{print $9}'`
fi
${BACKUP_BIN} --raw --read-from-remote-server --stop-never --host=${REMOTE_HOST} --port=${REMOTE_PORT} --user=${REMOTE_USER} --password=${REMOTE_PASS} ${LAST_FILE}
echo "`date +"%Y/%m/%d %H:%M:%S"` mysqlbinlog停止，返回代码：$?" | tee -a ${BACKUP_LOG}
echo "${SLEEP_SECONDS}秒后再次连接并继续备份" | tee -a ${BACKUP_LOG}
sleep ${SLEEP_SECONDS}
done