下面这个脚本是采集数据库自增主键水位的(遇到过业务主键设置过小,导致出问题的,因此我们必须将自增id的水位线监控起来)
IP_ADDR=$(/sbin/ip a|egrep '10.[0|1].[1-9]+.[1-9]+*' | awk '{print $2}'| cut -d '/' -f 1);
mysql -uroot -p123456 2>/dev/null -e "set @ip='$IP_ADDR';SELECT @ip AS IP_ADDR,
curdate() AS INSERT_DATE ,
table_schema,
table_name,
column_name,
AUTO_INCREMENT,
POW(2, CASE data_type
WHEN 'tinyint' THEN 7
WHEN 'smallint' THEN 15
WHEN 'mediumint' THEN 23
WHEN 'int' THEN 31
WHEN 'bigint' THEN 63
END+(column_type LIKE '% unsigned'))-1 AS max_int
FROM information_schema.tables t
JOIN information_schema.columns c USING (table_schema,table_name)
WHERE
c.extra = 'auto_increment'
AND
t.TABLE_SCHEMA NOT IN ('information_schema','mysql', 'sys','test','performance_schema')
AND
t.auto_increment IS NOT NULL ; "
关于MySQL的采集脚本, 在prometheus的mysql_exporter的源代码里面,有很多,大家感兴趣的可以自己去看一下代码。