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如何批量清除128组节点db上面的过期的binlog,释放磁盘空间
如果10台以内的db的话,自己手动ssh进去,clean就足以,但是上百台呢,就要写脚本了。大概思路:在 一台db跳转机上面, 写一个脚本,访问slave,远程获取正在复制的master上面的binlog位置, 然后再远程去purge master上面的binlog.
1, 建立slave dbserver列表 slavelist; 一个slave一行。
2,远程获取slave db上面的binlog位置以及slave的master主机名(也许是ip地址)
3,拿到binlog位置以及master主机名,然后ssh远程清理掉master上面的binlog
4,shell for循环操作step 2以及step 3。
附带脚本1:clean_binlog.sh
[python]
#!/bin/bash
# p1 the slave mysql db server
db03=$1
echo $dbserver;
ster_Log_File=`ssh $db03 " mysql -uxx -pxx --ssl-ca=/opt/mysql/ssl/ca-cert.pem --s
sl-cert=/opt/mysql/ssl/server-cert.pem --ssl-key=/opt/mysql/ssl/server-key.pem -e /"show slave status/G;/" |grep -i master_Log_File
"`;
# echo ##### 获取binlog信息
log_file=`echo $ster_Log_File | awk '{print $2}'`;
db01tmp=`ssh $db03 " mysql -uxx -pxx --ssl-ca=/opt/mysql/ssl/ca-cert.pem --s
sl-cert=/opt/mysql/ssl/server-cert.pem --ssl-key=/opt/mysql/ssl/server-key.pem -e /"show slave status/G;/" |grep -i Master_Host
"`;
[python]
# 获取master主机名或者ip地址
db01=`echo $db01tmp | awk '{print $2}'`
# 开始清理binlog日志信息
[python]
ssh $db01 " mysql -uxxx -pxx --ssl-ca=/opt/mysql/ssl/ca-cert.pem --ssl-cert=/op
t/mysql/ssl/server-cert.pem --ssl-key=/opt/mysql/ssl/server-key.pem -e /"purge master logs to '$log_file';/" "
# check master上面的binlog信息
[python]
ssh $db01 " df -h /mysql/binlog ";
[python]
附带批量for循环脚本2:
for s in `cat slavelist`; do sh clean_binlog.sh $s; done
这个是比较粗略的方案,肯定有不足之处,我的128组是mm组合,所以这样操作是可以的,架构不同估计会有变动,这里还涉及到purge之前的binlog的备份等等(有专门的备份机以及备份脚本)。
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