[squid-users] SSLBump, system requirements ?
Yuri
yvoinov at gmail.com
Wed Mar 21 13:08:09 UTC 2018
21.03.2018 14:55, FredB пишет:
>>> Perhaps I should retry SMP but unfortunately in the past I had many
>>> issues with, and some features I'm using still SMP-unaware
>> Squid's SMP itself does not solves SSL Bump issues. It's about
>> different
>> things, and, IMHO, irrelevant your load profile.
>
> I'm thinking about that, because the single squid core is 100% CPU
> I tried with 900MB and 50MB without more success, I also added sslflags-NO_DEFAULT_CA
>
> How much simultaneous users do you have ? and bandwidth ?
>
> I'm using this right now, the number of process used is very better now but still an issue with CPU
>
> acl nobump dstdomain "/home/squid/domains"
>
> http_port 8080 ssl-bump cert=/etc/squid/ca_orion/cert generate-host-certificates=on sslflags=NO_DEFAULT_CA dynamic_cert_mem_cache_size=500MB
> sslcrtd_program /usr/lib/squid/ssl_crtd -s /usr/lib/squid/ssl_db -M 500MB
> sslcrtd_children 1000 startup=100 idle=5
Still misconfiguration. Pay attention. You set
dynamic_cert_mem_cache_size=500MB
Again - why so much?
Do not think that a lot of RAM will not make anything worse.
For some unknown reason, you set dynamic_cert_mem_cache_size equal to -M
on-disk fs limit. It is enough to set dynamic_cert_mem_cache_size to
1/10-1/20 of overall SSL db on-disk size.
And still too high upper children limit. Just imagine, how much RAM will
eat by 1000 processes. Each with own heap.
It seems for me, in your case good initial approximation will be
sslcrtd_children 256 startup=100 idle=200
No more. Other changes will do only based on performance stats and
diagnostics.
> sslproxy_capath /etc/ssl/certs/
> sslproxy_foreign_intermediate_certs /etc/squid/ssl_certs/imtermediate.ca.pem
>
> acl step1 at_step SslBump1
> ssl_bump peek step1 all
> ssl_bump splice nobump
> ssl_bump bump all
>
> Maybe there is a problem with memory, but as you can see here CPU is the point
>
> top - 09:50:04 up 16:16, 1 user, load average: 1,72, 1,78, 1,39
> Tasks: 393 total, 3 running, 390 sleeping, 0 stopped, 0 zombie
> %Cpu(s): 8,4 us, 1,2 sy, 0,0 ni, 89,6 id, 0,3 wa, 0,0 hi, 0,5 si, 0,0 st
> KiB Mem: 66086692 total, 28654240 used, 37432452 free, 2974568 buffers
> KiB Swap: 1952764 total, 0 used, 1952764 free. 17653336 cached Mem
>
> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
> 9803 squid 20 0 3913044 3,452g 13464 R 99,9 5,5 7:47.47 squid
> 10051 e2guard+ 20 0 0,122t 284392 5124 S 25,6 0,4 1:33.10 e2guardian
> 9804 squid 20 0 21956 5628 4420 S 7,3 0,0 0:48.93 ssl_crtd
> 9805 squid 20 0 21952 5672 4372 S 6,3 0,0 0:31.25 ssl_crtd
> 9806 squid 20 0 21952 5476 4252 S 2,7 0,0 0:19.10 ssl_crtd
> 9807 squid 20 0 21952 5616 4408 S 2,3 0,0 0:13.88 ssl_crtd
> 9808 squid 20 0 21952 5540 4332 S 2,3 0,0 0:10.59 ssl_crtd
> 9810 squid 20 0 21956 5536 4332 S 2,0 0,0 0:05.61 ssl_crtd
> 9809 squid 20 0 21952 5584 4372 S 1,7 0,0 0:07.40 ssl_crtd
> 9996 squid 20 0 25612 2924 2696 S 1,3 0,0 0:05.47 diskd
> 9995 squid 20 0 25612 2744 2516 S 1,0 0,0 0:04.41 diskd
> 9811 squid 20 0 21964 5588 4372 S 0,7 0,0 0:03.72 ssl_crtd
> 9813 squid 20 0 21848 5660 4464 S 0,7 0,0 0:01.96 ssl_crtd
>
> Amos, there is way to add the domain requested in message like this ?
>
> 2018/03/21 09:45:30| Error negotiating SSL on FD 1835: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed (1/-1/0)
> 2018/03/21 09:45:30| Error negotiating SSL on FD 4782: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed (1/-1/0)
>
> It can be very, very, useful for analysis
>
> Thanks
>
> FredB
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--
"C++ seems like a language suitable for firing other people's legs."
*****************************
* C++20 : Bug to the future *
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