squid异常停止的排查步骤

今天重启squid的时候发现，squid启动后，status 一会就stop了

whoami@blackman:~/script/AutoProxy-master/main/server$ sudo service squid3 start

squid3 start/running, process 19021

whoami@blackman:~/script/AutoProxy-master/main/server$ sudo service squid3 status

squid3 start/running, process 19154

whoami@blackman:~/script/AutoProxy-master/main/server$ sudo service squid3 status

squid3 stop/waiting

点击并拖拽以移动

通过查看日志文件发现是了异常，提示中建议运行squid -z来检查swap 目录

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

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通过查看squid -z发现是因为权限的问题，导致缓存文件无法写入

whoami@blackman:~/script/AutoProxy-master/main/server$ /usr/sbin/squid3 -z

whoami@blackman:~/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

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于是用sudo chmod 777 /var/cache/squid/就解决了，这里由于是局域网服务器，直接就是777，简单粗暴些。

whoami@blackman:~/script/AutoProxy-master/main/server$ sudo chmod 777 /var/cache/squid/

whoami@blackman:~/script/AutoProxy-master/main/server$ sudo /usr/sbin/squid3 -z

whoami@blackman:~/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

点击并拖拽以移动

到这里就解决了。squid -z创建完swap 目录后，会停在那，我等了几分钟，等不急了，直接ctrl+c给他结束了。然后service squid3 start就正常了。

DEUBG手册：

出问题时先去翻日志文件，一般成熟的软件都有完善的日志记录，对定位异常非常有帮助。

巴特西

squid异常停止的排查步骤

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