python logging日志输出到mysql数据库

logging的日志输出没有现成的输出到数据库的，然后网上也没找到现成的输出到mysql数据库的，就看了下源码，自己封装了个

实现方法

简单来说，就是写一个类继承logging.Handler，并重写emit方法，我这里是结合sqlalchemy的，如果日志表不存在，会直接在指定数据库创建指定名字的表，也可以在init中采用普通的pymysql的方式创建数据库连接，然后在emit中使用cursor执行sql语句提交

# coding: utf-8
import logging
import pymysql
from sqlalchemy import (Column, DateTime, Integer, MetaData,
                        String, Table, create_engine, text)
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import mapper, sessionmaker

class LoggerHandlerToMysql(logging.Handler):
    def __init__(self, configdb_str, table_name):
        self.config_engine = create_engine(configdb_str)
        self.ConfigSession = sessionmaker(bind = self.config_engine)
        self.config_session = self.ConfigSession()
        metadata = MetaData(self.config_engine)
        log_table = Table(table_name, metadata,
            Column('id', Integer, primary_key = True),
            Column('create_time', DateTime, nullable=False, server_default=text("'0000-00-00 00:00:00.000'")),
            Column('level_name', String(10)),
            Column('message', String(255)),
            Column('splilt_type', String(10)),
            Column('split_base', String(10)),
            Column('exc_info', String(255)),
            Column('exc_text', String(255)),
            Column('file_name', String(100)),
            Column('line_no', Integer),
            Column('func_name', String(255)),
            Column('stack_info', String(255)))
        metadata.create_all(self.config_engine)
        self.LogModel = getModel(table_name, self.config_engine)
        logging.Handler.__init__(self)

    def emit(self,record):
        log_model = self.LogModel()
        log_model.create_time = str(record.asctime).replace(",", ".")
        log_model.level_name = record.levelname
        message = record.message
        message = message.split("---")
        log_model.message = message[0].strip()
        if len(message) > 1:
            log_model.splilt_type = message[1].strip()
        if len(message) > 2:
            log_model.split_base = message[2].strip()
        log_model.exc_info = record.exc_info
        log_model.exc_text = record.exc_text
        log_model.file_name = record.filename
        log_model.line_no = record.lineno
        log_model.func_name = record.funcName
        log_model.stack_info = record.stack_info
        self.config_session.add(log_model)
        self.config_session.commit()
        pass

    def close(self):
        self.config_session.commit()
        self.config_session.close()
        pass

调用方式

    # 数据库连接字符串
    configdb_str = 'mysql+pymysql://%s:%s@%s:%d/%s?charset=%s'%(user, password, host, int(port), db, charset)
    # 表名
    log_to_sql = 'service_log'
    logger = logging.getLogger()
    handler = LoggerHandlerToMysql(configdb_str, log_to_sql)
    logger.addHandler(handler)