1. 今天重啟squid的時候發現，squid啟動後，status 一會就stop了

[email protected]:~/script/AutoProxy-master/main/server$ sudo service squid3 start
squid3 start/running, process 19021
[email protected]:~/script/AutoProxy-master/main/server$ sudo service squid3 status
squid3 start/running, process 19154
[email protected]:~/script/AutoProxy-master/main/server$ sudo service squid3 status
squid3 stop/waiting
 

2. 通過檢視日誌檔案發現是了異常，提示中建議執行squid -z來檢查swap 目錄

FATAL:  Failed to verify one of the swap directories, Check cache.log
        for details.  Run 'squid -z' to create swap directories
        if needed, or if running Squid for the first time.
Squid Cache (Version 3.3.8): Terminated abnormally.
CPU Usage: 0.016 seconds = 0.009 user + 0.007 sys
Maximum Resident Size: 73008 KB
Page faults with physical i/o: 0
 

3. 通過檢視squid -z發現是因為許可權的問題，導致快取檔案無法寫入

[email protected]n:~/script/AutoProxy-master/main/server$ /usr/sbin/squid3 -z
[email protected]:~/script/AutoProxy-master/main/server$ 2018/01/24 11:26:12 kid1| Creating missing swap directories
FATAL: Failed to make swap directory /var/cache/squid: (13) Permission denied
2018/01/24 11:26:15 kid1| Creating missing swap directories
FATAL: Failed to make swap directory /var/cache/squid: (13) Permission denied
 

3. 於是用sudo chmod 777 /var/cache/squid/就解決了，這裡由於是區域網伺服器，直接就是777，簡單粗暴些。

[email protected]:~/script/AutoProxy-master/main/server$ sudo chmod 777 /var/cache/squid/
[email protected]:~/script/AutoProxy-master/main/server$ sudo /usr/sbin/squid3 -z
[email protected]:~/script/AutoProxy-master/main/server$ 2018/01/24 11:29:42 kid1| Creating missing swap directories
2018/01/24 11:29:42 kid1| /var/cache/squid exists
2018/01/24 11:29:42 kid1| Making directories in /var/cache/squid/00
2018/01/24 11:29:42 kid1| Making directories in /var/cache/squid/01
2018/01/24 11:29:42 kid1| Making directories in /var/cache/squid/02
2018/01/24 11:29:42 kid1| Making directories in /var/cache/squid/03
2018/01/24 11:29:42 kid1| Making directories in /var/cache/squid/04
2018/01/24 11:29:42 kid1| Making directories in /var/cache/squid/05
2018/01/24 11:29:42 kid1| Making directories in /var/cache/squid/06
2018/01/24 11:29:42 kid1| Making directories in /var/cache/squid/07
2018/01/24 11:29:42 kid1| Making directories in /var/cache/squid/08
2018/01/24 11:29:42 kid1| Making directories in /var/cache/squid/09
2018/01/24 11:29:42 kid1| Making directories in /var/cache/squid/0A
2018/01/24 11:29:42 kid1| Making directories in /var/cache/squid/0B
2018/01/24 11:29:42 kid1| Making directories in /var/cache/squid/0C
2018/01/24 11:29:42 kid1| Making directories in /var/cache/squid/0D
2018/01/24 11:29:42 kid1| Making directories in /var/cache/squid/0E
2018/01/24 11:29:42 kid1| Making directories in /var/cache/squid/0F

到這裡就解決了。squid -z建立完swap 目錄後，會停在那，我等了幾分鐘，等不急了，直接ctrl+c給他結束了。然後service squid3 start就正常了。

DEUBG手冊：

1. 出問題時先去翻日誌檔案，一般成熟的軟體都有完善的日誌記錄，對定位異常非常有幫助 。