MongoDB Log Rotation

Overview

MongoDB can use the standard method to implement log rotation, that is, to get to the current log and open a new one. To implement it, the Mongod instance renames the current log file by adding a UTC (GMT) timestamp at the end of the file name, then opens the new log file, closes the old log file, and sends all new log information to the new logfile.

Rotation Setps

MongoDB Standard log Rotation method is through the log rotation command, or let the mongod process to receive a SIGUSER1 signal, the following specific implementation methods

1 open Mongod process, ensure appending enabled

Mongod-v--logpath/var/log/mongodb/server1.log--logappend

2 See if there are MONGO log files in the terminal

ls/var/log/mongodb/server1.log*

3 If it is a Windows system, open the MONGO shell, go to the Admin database and enter the rotation command, i.e.

Use admin
Db.runcommand ({logrotate:1})

If it is a Linux system, run KILL-SIGUSR1 <mongod process at the terminal id>

4 Review the results again for a new MONGO log file generation

ls/var/log/mongodb/server1.log*

My Auto Script and Crontab

Here is the timed script I wrote in Python, which generates a new log every day, and logs for more than 10 days are deleted by itself.

#!/bin/env python
Import sys
import OS
Import commands
Import datetime, Time

#get MONGO pid
Mongo_pid = Commands.getoutput ("/sbin/pidof mongod")
Print mongo_pid

#send Sig to MONGO
if mongo_pid! = ':
    cmd = '/bin/kill-usr1%s '% (mongo_pid)
    Print CMD
    mongo_rotate = commands.getoutput (cmd)
Else:
    print "Mongod is not running ..."

#clean log which > ten days
Str_now = Time.strftime ("%y-%m-%d")
Dat_now = Time.strptime (Str_now, "%y-%m-%d")
Array_dat_now = Datetime.datetime (dat_now[0],dat_now[1],dat_now[2])
LNS = Commands.getoutput ("/bin/ls--full-time/var/log/mongodb/|awk ' {print $6, $9} ')
For ln in lns.split (' \ n '):
WS = Ln.split ()
If Len (ws)! = 2:
Continue
WS1 = Time.strptime (Ws[0], "%y-%m-%d")
WS2 = Datetime.datetime (ws1[0],ws1[1],ws1[2])
if (array_dat_now-ws2). Days > 10:
V_del = Commands.getoutput ("/bin/rm-rf/var/log/mongodb//%s"% (Ws[1]))

CRONTAB-E view scheduled Tasks under root

0 2 * * */home/jiangjianjian/mongo_log_rotate.py >/home/jiangjianjian/null 2>&1

MongoDB Log Rotation