2019.03.09 14:42 274瀏覽python
MongoDB 日誌切換(Rotate Log Files)實戰mongodb
1. 在mongo shell下,執行logRotate命令: shell
use admin 工具
db.runCommand({logRotate:1})post
須要在mongos,mongod,config server運行。ui
該方式的變種:spa
a) 在unix shell下運行: unix
mongo localhost/admin –eval 「dbo.runCommand({logRotate:1})」日誌
b) Bash腳本: server
#!/bin/sh
### log rotate
mongo localhost/admin –evel 「db.runCommand({logRotate:1})」
### compress newly rotated
for f in /var/log/mongodb/mongod.log.????-??-??T??-??-??;
do
7za a 「$f.z」 「$f」
rm –f 「$f」
done
c) 將以下腳本保存到logRotate.js文件:
db.getMongo().getDB(「admin」).runCommand({logRotate:1})
建立腳本logRotate.sh:
#!/bin/sh
# Clear old logs
rm /var/log/mongodb/mongod.log.*
# Rotate logs
mongo logRotate.js
d) logRotate.sh //寫到計劃任務crontab便可(須要expect軟件包)
#!/usr/bin/expect –f
spawn /usr/local/mongodb/bin/mongo admin -udev -ptest –quiet
expect ">"
send db.runCommand("logRotate")
send "\r\n"
expect ">"
send "exit"
2. 使用SIGUSR1信號:
kill –SIGUSR1 <mongod process id>
find /var/log/mongodb/mongodb.log.* -mtime +7 –delete
該方法的變種:
a) 用python寫的定時腳本,天天產生一個新的log,超過7天的log自行刪除。
#!/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 > 7 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 > 7:
v_del = commands.getoutput("/bin/rm -rf /var/log/mongodb//%s" % (ws[1]))
在root下crontab –e編輯定時任務
0 2 * * * /root/mongo_log_rotate.py >/root/null 2>&1
3. 日誌管理工具logrotate
自動化的最好方式是使用logrotate,其中copytruncate參數能更好工做。
拷貝如下代碼到/etc/logrotate.d/mongodb文件中,確保腳本中的路徑和文件名正確。
# vi /etc/logrotate.d/mongodb
/var/log/mongodb/*.log {
daily
rotate 7
compress
dateext
missingok
notifempty
sharedscripts
copytruncate
postrotate
/bin/kill -SIGUSR1 `cat /var/lib/mongo/mongod.lock 2> /dev/null` 2> /dev/null || true
endscript
}
# logrotate –f /etc/logrotate.d/mongodb
4. Mongodb bug
mongodb穩定性差強人意。在切換過程當中也會致使mongodb進程終止。
具體內容能夠查看下mongodb bug系統:SERVER-473九、SERVER-3339。
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