MongoDB log Rotation

MongoDB log Rotation

MongoDB can use a standard method to rotate logs, that is, to obtain the current log and enable a new one. To achieve this, the mongod instance renames the current log file by adding a UTC (GMT) timestamp at the end of the file name, and then opens the new log file, close the old log file and send all new log information to the new log file.

Rotation Setps

The MongoDB standard log rotation method is through the log rotation command, or let the mongod process receive a SIGUSER1 signal, the following implementation method

1. Enable the mongod process to ensure appending is enabled.

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

2. Check whether the mongo log file exists on the terminal.

Ls/var/log/mongodb/server1.log *

3. In Windows, open mongo shell, enter the admin database, and enter the rotation command, that is

Use admin

Db. runCommand ({logRotate: 1 })

In Linux, run kill-SIGUSR1 <mongod process id> on the terminal.

4. check whether a new mongo log file is generated.

Ls/var/log/mongodb/server1.log *

My auto script and crontab

The following is a scheduled script written in python. A new log is generated every day. logs that have been written for more than 10 days are automatically deleted.

#! /Bin/env python
Import sys
Import OS
Import commands
Import datetime, time

# Get mongo pid
Performance_pid = commands. getoutput ("/sbin/pidof mongod ")
Print pai_pid

# Send Sig to mongo
If pai_pid! = '':
Cmd = "/bin/kill-USR1% s" % (pai_pid)
Print cmd
Export _rotate = commands. getoutput (cmd)
Else:
Print "specified D is not running ..."

# Clean log which> 10 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])

View scheduled tasks in crontab-e under root

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

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