[squid-users] Re: Re: Re: Re: squid_kerb_auth High CPU load.

Hi Simon,

  The config is standard and looks OK. Can you run strace (strace -f -F -o
/tmp/squid_kerb_auth.strace -p <pid>) for 1-2 min against the process when
it is busy and send me the output ?

Markus

"Simon Dwyer" <mail_at_simmyd.net> wrote in message
news:1334876889.2408.45.camel_at_sdwyer.federalit.net...
> Not sure how to give you the figures of req/sec but this morning when i
> flicked it over there would have been max 15 people using it for normal
> browsing.
>
> following is my krb5.conf incase i am missing something or doing
> something wrong.
>
> [logging]
> default = FILE:/var/log/krb5libs.log
> kdc = FILE:/var/log/krb5kdc.log
> admin_server = FILE:/var/log/kadmind.log
>
> [libdefaults]
> default_realm = MULAWA.INTERNAL
> dns_lookup_realm = false
> dns_lookup_kdc = false
> ticket_lifetime = 24h
> renew_lifetime = 7d
> forwardable = true
> default_tkt_enctypes = arcfour-hmac-md5 des-cbc-crc des-cbc-md5
> default_tgs_enctypes = arcfour-hmac-md5 des-cbc-crc des-cbc-md5
>
> [realms]
>
> MULAWA.INTERNAL = {
> kdc = dc-hbt-01.mulawa.internal
> kdc = dc-hbt-02.mualwa.internal
> }
>
> [domain_realm]
> mulawa.internal = MULAWA.internal
> .mulawa.internal = MULAWA.internal
>
>
>
>
> On Thu, 2012-04-19 at 23:36 +0100, Markus Moeller wrote:
>> How many request/sec does your squid serve ? I would not expect it to be
>> that much higher then with NTLM.
>>
>> Markus
>>
>> "Simon Dwyer" <mail_at_simmyd.net> wrote in message
>> news:1334870417.2408.38.camel_at_sdwyer.federalit.net...
>> > Moved my production over to kerberos this morning with the correct
>> > export for kerberos and this is whats happening
>> >
>> > 20711 squid 20 0 32212 3748 1732 R 34.3 0.1 0:04.42
>> > squid_kerb_auth
>> > 20716 squid 20 0 32200 3748 1732 R 34.3 0.1 0:08.41
>> > squid_kerb_auth
>> > 20712 squid 20 0 30544 2196 1732 S 20.6 0.1 0:28.23
>> > squid_kerb_auth
>> >
>> > They are just the top 3 processes.
>> >
>> > When i am not using kerberos authentication my cpu is hardly touched.
>> >
>> > Any insight would be awesome.
>> >
>> > Simon
>> >
>> > On Thu, 2012-04-19 at 16:03 +1000, Simon Dwyer wrote:
>> >> Hi Markus,
>> >>
>> >> I have actually got this now setup on a second machine.
>> >>
>> >> When i put in the export the HTTP_23 does not appear anymore which i
>> >> am
>> >> expecting.
>> >>
>> >> I will double check this in production tomorrow morning and see how i
>> >> go.
>> >>
>> >> Simon
>> >>
>> >> On Thu, 2012-04-19 at 15:49 +1000, Simon Dwyer wrote:
>> >> > Hi Markus,
>> >> >
>> >> > I do have a
>> >> >
>> >> > -rw-------. 1 squid squid 92907 Apr 19 08:21 HTTP_23
>> >> >
>> >> > which may have been the last time i tried to run it this morning.
>> >> >
>> >> > I wont be able to try it again till tomorrow morning to see if it
>> >> > modifies it
>> >> >
>> >> > Cheers,
>> >> >
>> >> > Simon
>> >> >
>> >> > On Thu, 2012-04-19 at 06:44 +0100, Markus Moeller wrote:
>> >> > > Hi Simon,
>> >> > >
>> >> > > Unfortunately I do not have a production environment to give you
>> >> > > average
>> >> > > usage numbers.
>> >> > >
>> >> > > Can you check that you don't have a file in /var/tmp like (or at
>> >> > > least is
>> >> > > not modified):
>> >> > >
>> >> > > -rw------- 1 squid nogroup 603 Apr 7 01:13
>> >> > > /var/tmp/opensuse12--HTTP-044_31
>> >> > >
>> >> > > This is the replay cache if not disabled.
>> >> > >
>> >> > > Markus
>> >> > >
>> >> > > "Simon Dwyer" <mail_at_simmyd.net> wrote in message
>> >> > > news:1334813176.2408.29.camel_at_sdwyer.federalit.net...
>> >> > > > Hi Markus,
>> >> > > >
>> >> > > > This is in the /etc/init.d/squid
>> >> > > >
>> >> > > > if [ -f /etc/sysconfig/squid ]; then
>> >> > > > . /etc/sysconfig/squid
>> >> > > > fi
>> >> > > >
>> >> > > > What should the cpu usage be of each squid_kerb_auth process
>> >> > > > when
>> >> > > > used?
>> >> > > >
>> >> > > > Cheers,
>> >> > > >
>> >> > > > Simon
>> >> > > >
>> >> > > > On Thu, 2012-04-19 at 06:15 +0100, Markus Moeller wrote:
>> >> > > >> Are you sure /etc/sysconfig/squid is sourced by the squid
>> >> > > >> startup
>> >> > > >> script
>> >> > > >> ?
>> >> > > >> Markus
>> >> > > >>
>> >> > > >> "Simon Dwyer" <mail_at_simmyd.net> wrote in message
>> >> > > >> news:1334789097.2408.17.camel_at_sdwyer.federalit.net...
>> >> > > >> > Hi all,
>> >> > > >> >
>> >> > > >> > I have got kerberos working and moved it to production but
>> >> > > >> > then
>> >> > > >> > the
>> >> > > >> > server started smashing its cpu. It seems that the
>> >> > > >> > squid_kerb_auth
>> >> > > >> > processes are killing the cpu.
>> >> > > >> >
>> >> > > >> > I have the following in my config.
>> >> > > >> >
>> >> > > >> > /etc/sysconfig/squid/
>> >> > > >> >
>> >> > > >> > KRB5RCACHETYPE=none
>> >> > > >> > export KRB5RCACHETYPE
>> >> > > >> >
>> >> > > >> > /etc/squid/squid.conf
>> >> > > >> >
>> >> > > >> > auth_param negotiate program /usr/bin/negotiate_wrapper
>> >> > > >> > --kerberos /usr/lib64/squid/squid_kerb_auth -i -r -s
>> >> > > >> > GSS_C_NO_NAME
>> >> > > >> > --ntlm /usr/bin/ntlm_auth --helper-protocol=squid-2.5-ntlmssp
>> >> > > >> > --domain=DOMAIN.EXAMPLE
>> >> > > >> > auth_param negotiate children 30
>> >> > > >> > auth_param negotiate keep_alive on
>> >> > > >> >
>> >> > > >> > From what i have read the first part should fix the high cpu
>> >> > > >> > issue but
>> >> > > >> > it doesnt seem to help.
>> >> > > >> >
>> >> > > >> > More the case i am having trouble getting that variable
>> >> > > >> > active.
>> >> > > >> >
>> >> > > >> > Anyone else come up on this?
>> >> > > >> >
>> >> > > >> > Simon
>> >> > > >> >
>> >> > > >> >
>> >> > > >>
>> >> > > >>
>> >> > > >
>> >> > > >
>> >> > > >
>> >> > >
>> >> > >
>> >> >
>> >> >
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Received on Fri Apr 20 2012 - 12:24:31 MDT