[squid-users] Squid stopped working after cache.log and access.log rotation
Eliezer Croitoru
eliezer at ngtech.co.il
Thu Apr 20 19:24:21 UTC 2017
Hey CM,
>From the output I understand that there wasn't a change in squid packaging for 16.04 and they still use rc\init.d startup scripts.
Also they probably use the same logrotate scripts from very long ago.
We first must understand if squid is running and it seems that systemd sees it as running.
I do not see in lsof output any port listening mentioned so I assume this is the reason for the issue in hands.
The first thing I would do is run a crontab that will check if squid is alive using a cache manager info page fetch and check if it's listening using netstat or ss.
(did you tried to see if squid is listening using netstat or ss??)
The next step would be to check your squid roatate script and to verify it's doing what it suppose to do.
After all this I would recommend changing from the rc\init.d startup script to a real system based one and abandon the old rotation scripts of Ubuntu or fix them.
If you are looking for a fix it's one path and if you are looking to get the work done properly by Ubuntu it's a whole new wagon.
I have been working on squid packages for Ubuntu and Debian that uses system scripts but the packages are not perfected yet.
Let me know the path you want to choose and also your approach to things and I will try to help you with which of the options you will choose to resolve the issues.
Eliezer
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From: Chee M Gui [mailto:cheemeng at function.com]
Sent: Thursday, April 20, 2017 7:17 PM
To: Eliezer Croitoru <eliezer at ngtech.co.il>
Cc: squid-users at lists.squid-cache.org
Subject: Re: [squid-users] Squid stopped working after cache.log and access.log rotation
Hi Eliezer
Thank you for the response, and sorry for the late reply.
As requested, here are the output of the commands you suggested:
root at paproxy:/# systemctl status squid
● squid.service - LSB: Squid HTTP Proxy version 3.x
Loaded: loaded (/etc/init.d/squid; bad; vendor preset: enabled)
Active: active (running) since Wed 2017-03-15 14:47:53 PDT; 1 months 5 days ago
Docs: man:systemd-sysv-generator(8)
Tasks: 4
Memory: 54.4M
CPU: 2min 38.957s
CGroup: /system.slice/squid.service
├─25482 /usr/sbin/squid -YC -f /etc/squid/squid.conf
├─25484 (squid-1) -YC -f /etc/squid/squid.conf
├─25485 (logfile-daemon) /var/log/squid/access.log
└─25486 (unlinkd)
Warning: Journal has been rotated since unit was started. Log output is incomplete or unavailable.
root at paproxy:/#
top - 09:11:45 up 54 days, 23:51, 2 users, load average: 0.00, 0.00, 0.00
Tasks: 141 total, 1 running, 140 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.0 us, 0.0 sy, 0.0 ni, 99.9 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
KiB Mem : 6043140 total, 4844728 free, 135292 used, 1063120 buff/cache
KiB Swap: 6222844 total, 6222844 free, 0 used. 5556300 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
23355 root 20 0 41668 3776 3236 R 6.7 0.1 0:00.01 top
1 root 20 0 37884 5968 4020 S 0.0 0.1 0:27.20 systemd
2 root 20 0 0 0 0 S 0.0 0.0 0:00.22 kthreadd
3 root 20 0 0 0 0 S 0.0 0.0 0:01.01 ksoftirqd/0
5 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kworker/0:0H
7 root 20 0 0 0 0 S 0.0 0.0 1:28.65 rcu_sched
8 root 20 0 0 0 0 S 0.0 0.0 0:00.00 rcu_bh
9 root rt 0 0 0 0 S 0.0 0.0 0:00.14 migration/0
10 root rt 0 0 0 0 S 0.0 0.0 0:05.53 watchdog/0
11 root rt 0 0 0 0 S 0.0 0.0 0:05.75 watchdog/1
12 root rt 0 0 0 0 S 0.0 0.0 0:00.14 migration/1
13 root 20 0 0 0 0 S 0.0 0.0 0:02.48 ksoftirqd/1
15 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kworker/1:0H
16 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kdevtmpfs
17 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 netns
18 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 perf
19 root 20 0 0 0 0 S 0.0 0.0 0:01.26 khungtaskd
20 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 writeback
root at paproxy:/# ps -aux | grep squid
root 23358 0.0 0.0 14224 976 pts/0 S+ 09:12 0:00 grep --color=auto squid
root 25482 0.0 0.1 109272 6416 ? Ss Mar15 0:00 /usr/sbin/squid -YC -f /etc/squid/squid.conf
proxy 25484 0.0 0.7 166684 45184 ? S Mar15 2:27 (squid-1) -YC -f /etc/squid/squid.conf
proxy 25485 0.0 0.0 13280 1648 ? S Mar15 0:03 (logfile-daemon) /var/log/squid/access.log
root at paproxy:/#
root at paproxy:/# df -h
Filesystem Size Used Avail Use% Mounted on
udev 2.9G 0 2.9G 0% /dev
tmpfs 591M 60M 531M 11% /run
/dev/sda1 911G 1.9G 863G 1% /
tmpfs 2.9G 12K 2.9G 1% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 2.9G 0 2.9G 0% /sys/fs/cgroup
tmpfs 591M 0 591M 0% /run/user/1000
tmpfs 591M 0 591M 0% /run/user/0
root at paproxy:/#
root at paproxy:/# df -h
Filesystem Size Used Avail Use% Mounted on
udev 2.9G 0 2.9G 0% /dev
tmpfs 591M 60M 531M 11% /run
/dev/sda1 911G 1.9G 863G 1% /
tmpfs 2.9G 12K 2.9G 1% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 2.9G 0 2.9G 0% /sys/fs/cgroup
tmpfs 591M 0 591M 0% /run/user/1000
tmpfs 591M 0 591M 0% /run/user/0
root at paproxy:/#
root at paproxy:/# lsof -n|egrep "proxy|squid" | more
squid 25482 root cwd DIR 8,1 4096 2 /
squid 25482 root rtd DIR 8,1 4096 2 /
squid 25482 root txt REG 8,1 6430816 41946763 /usr/sbin/squid
squid 25482 root mem REG 8,1 47648 10093387 /lib/x86_64-linux-gnu/libnss_nis-2.23.
so
squid 25482 root mem REG 8,1 93128 10093399 /lib/x86_64-linux-gnu/http://libnsl-2.23.so
squid 25482 root mem REG 8,1 35688 10093400 /lib/x86_64-linux-gnu/libnss_compat-2.
23.so
squid 25482 root mem REG 8,1 47600 10093403 /lib/x86_64-linux-gnu/libnss_files-2.2
3.so
squid 25482 root mem REG 8,1 25913104 41944015 /usr/lib/x86_64-linux-gnu/libicudata.s
o.55.1
squid 25482 root mem REG 8,1 22520 10093098 /lib/x86_64-linux-gnu/libmnl.so.0.1.0
squid 25482 root mem REG 8,1 26248 41948589 /usr/lib/x86_64-linux-gnu/libnfnetlink
.so.0.2.0
Thank you once again
CM
On Thu, Mar 23, 2017 at 1:59 PM, Eliezer Croitoru <mailto:eliezer at ngtech.co.il> wrote:
There is another option!
The log rotate script is doing something nasty or the systemd service file start up squid in a weird way.
The output of:
$ systemctl status squid
$ top -n1 -b
$ ps aux
$ df -h
$ netstat -ntulp
$ lsof -n|egrep "proxy|squid"
How many clients this system has?
Is the system facing the Internet directly or behind some nat(aws or another provider)?
The above are the basic required data to understand the situation.
All The Bests,
Eliezer
----
http://ngtech.co.il/lmgtfy/
Linux System Administrator
Mobile: tel:%2B972-5-28704261
Email: mailto:eliezer at ngtech.co.il
From: squid-users [mailto:mailto:squid-users-bounces at lists.squid-cache.org] On Behalf Of Chee M Gui
Sent: Wednesday, March 22, 2017 5:18 PM
To: mailto:squid-users at lists.squid-cache.org
Subject: [squid-users] Squid stopped working after cache.log and access.log rotation
Hi All
We recently installed Squid 3.5.12-1ubuntu7.3 on Ubuntu 16.04.2 LTS. It ran fine at first but stopped working after a while. telnet server 3128 still works, i.e., opens a blank window, but Squid is just not accepting requests. Then we realized that there is no new access.log file. The access.log file stopped rotated at 6:24AM on 3/17/2017. It looks like Squid wasn't able to create a new access.log? We could not find any error message in syslog or the cache.log. We haven't rebooted the server because we want to know what went wrong. It isn't the firewall blocking Squid because Squid was working fine all the while until recently. Also after it stopped working, we disabled the firewall to see if it would work but it still didn't work.
root at paproxy:/var/log/squid# ls -alt
total 15536
drwxr-xr-x 2 proxy proxy 4096 Mar 21 06:25 .
-rw-r----- 1 proxy proxy 63 Mar 21 06:25 cache.log
drwxrwxr-x 9 root syslog 4096 Mar 21 06:25 ..
-rw-r----- 1 proxy proxy 63 Mar 20 06:25 cache.log.1
-rw-r----- 1 proxy proxy 83 Mar 19 06:25 cache.log.2.gz
-rw-r----- 1 proxy proxy 15759111 Mar 17 06:24 access.log.1
-rw-r----- 1 proxy proxy 117223 Mar 17 05:52 netdb.state
Any ideas what went wrong?
Thank you very much in anticipation.
Gui
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