Re: Re: Re: Re: squid_kerb_auth High CPU load.

["Markus Moeller" <huaraz@xxxxxxxxxxxxxxxx>]

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@xxxxxxxxxx> wrote in message 
news:1334876889.2408.45.camel@xxxxxxxxxxxxxxxxxxxx...
> 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@xxxxxxxxxx> wrote in message
> > news:1334870417.2408.38.camel@xxxxxxxxxxxxxxxxxxxx...
> > > 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@xxxxxxxxxx> wrote in message
> > >> > > news:1334813176.2408.29.camel@xxxxxxxxxxxxxxxxxxxx...
> > >> > > > 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@xxxxxxxxxx> wrote in message
> > >> > > >> news:1334789097.2408.17.camel@xxxxxxxxxxxxxxxxxxxx...
> > >> > > >> > 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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