類比web伺服器產生的日誌佔滿磁碟故障解決方案

標籤：apache

生產環境可能你會遇到web伺服器產生的log記錄檔佔滿磁碟的現象，下面給出具體的解決方案

安裝httpd web服務

[[email protected] ~]# yum install httpd -y

啟動

[[email protected] ~]# /etc/init.d/httpd start

測試

[[email protected] ~]# lsof -i :80

COMMAND  PID   USER   FD   TYPE DEVICE SIZE/OFF NODE NAME

httpd   1542   root    4u  IPv6  12105      0t0  TCP *:http (LISTEN)

httpd   1544 apache    4u  IPv6  12105      0t0  TCP *:http (LISTEN)

httpd   1545 apache    4u  IPv6  12105      0t0  TCP *:http (LISTEN)

httpd   1546 apache    4u  IPv6  12105      0t0  TCP *:http (LISTEN)

安裝目錄介紹

Apache預設將網站的根目錄指向/var/www/html 目錄 

預設的主設定檔是/etc/httpd/conf/httpd.conf

配置儲存在的/etc/httpd/conf.d/目錄

[[email protected] html]#cd /var/www/html

設定訪問頁面

[[email protected] html]# echo "hello web" >/var/www/html/index.html

訪問測試

[[email protected] html]# curl -I http://127.0.0.1

HTTP/1.1 200 OK

Date: Wed, 31 Aug 2016 19:31:54 GMT

Server: Apache/2.2.15 (CentOS)

Last-Modified: Wed, 31 Aug 2016 19:30:35 GMT

建立記錄檔

[[email protected] html]# mkdir -p /app/logs

定義日誌到指定目錄

[[email protected] html]# sed -i "[email protected]#CustomLog logs/access_log [email protected] /app/logs/access_log [email protected]" /etc/httpd/conf/httpd.conf

[[email protected] html]# grep "access_log common" /etc/httpd/conf/httpd.conf

CustomLog /app/logs/access_log common

重啟使日誌生效

[[email protected] html]# /etc/init.d/httpd restart

建立一個小的檔案系統，用於存放上述 access_log 日誌

[[email protected] html]# dd if=/dev/zero of=/dev/sdb bs=10k count=100

100+0 records in

100+0 records out

1024000 bytes (1.0 MB) copied, 0.00173305 s, 591 MB/s

格式和掛載

[[email protected] html]# mkfs -t ext4 /dev/sdb

[[email protected] html]# mount -o loop /dev/sdb /app/logs

[[email protected] html]#/etc/init.d/httpd restart

[[email protected] html]# curl -s 127.0.0.1

hello world!!!

[[email protected] html]# cat /app/logs/access_log 

127.0.0.1 - - [01/Sep/2016:04:02:23 +0800] "GET / HTTP/1.1" 200 15

寫個迴圈指令碼訪問 httpd，使得 httpd 日誌充滿/app/logs 整個空間

for n in `seq 1000000`;do curl -s 127.0.0.1 >/dev/null;done

[[email protected] ~]# df -h

Filesystem      Size  Used Avail Use% Mounted on

/dev/sda3        18G  1.9G   15G  12% /

tmpfs           429M     0  429M   0% /dev/shm

/dev/sda1       194M   29M  155M  16% /boot

/dev/sda2       2.0G   67M  1.9G   4% /swap

/dev/sdb        979K  909K   20K  98% /app/logs

錯誤的刪除方案

[[email protected] ~]# rm -f /app/logs/access_log

[[email protected] ~]# lsof|grep del   #===>還有進程在調用

httpd      3306      root    7w      REG                7,0   912339         12 /app/logs/access_log (deleted)

httpd     35409    apache    7w      REG                7,0   912339         12 /app/logs/access_log (deleted)

httpd     35828    apache    7w      REG                7,0   912339         12 /app/logs/access_log (deleted)

httpd     35829    apache    7w      REG                7,0   912339         12 /app/logs/access_log (deleted)

解決方案

1、 請先停掉類比訪問測試指令碼

for n in `seq 1000000`;do curl -s 127.0.0.1>/dev/null;done

 

2、重啟 Http 服務

[[email protected] html]# /etc/init.d/httpd restart

查看處理結果

[[email protected] html]# df -h

Filesystem      Size  Used Avail Use% Mounted on

/dev/sda3        18G  1.9G   15G  12% /

tmpfs           429M     0  429M   0% /dev/shm

/dev/sda1       194M   29M  155M  16% /boot

/dev/sda2       2.0G   67M  1.9G   4% /swap

/dev/sdb        979K   17K  912K   2% /app/logs

理想的處理方案

清空日誌而不刪除日誌

>/app/logs/access_log

本文出自 “比爾營運筆記” 部落格，請務必保留此出處http://chenshoubiao.blog.51cto.com/6159058/1845310

類比web伺服器產生的日誌佔滿磁碟故障解決方案