Odd - I do not see any gethost calls at all in the strace

this is from "sudo strace /usr/local/sbin/syslog-ng -f /usr/local/etc/syslog-ng.conf > syslog-strace 2>&1"


I include the config.status and config.log also to see if that may help.

Jim


---- Balazs Scheidler <bazsi77@gmail.com> wrote: 

During startup syslog-ng queries the hostname using gethostname. Can you
strace syslog-ng and look for this call to see what it returns?

We are also resolving this using the dns which is also interesting.

Thanks
On Mar 13, 2014 7:08 PM, <jrhendri@roadrunner.com> wrote:

OK - after much poking around (including testing this on a different host
with this morning's latest source) here's what I found

I believe that syslog-ng is (for some reason) unable to come up with a
correct hostname for the local system.
I would really like to know why this is happening
I would also really like to know if any of the source options I tried
should have worked (I was kind of desperate with some of the combinations...)

That said - here's my summary:

Examining the "binary" files, It was always writing 256 bytes of "0" where
${HOST} should have been.

It *never* happened with a network source (tried with Kiwi sysloggen using
RCF and non RCF messages)
It *always* happened with any local source including all the ones
commented out (I tested each separately)

source s_local {
  unix-dgram("/dev/log"); # standard Linux log source (this is the default
place for the syslog() function to send logs to)
#!#  unix-stream("/dev/log"); # standard Linux log source (this is the
default place for the syslog() function to send logs to)
#!#     system();
#!#     internal();
};

Once I identified this behavior, I tried a number of options /
combinations to work around this including (each separately)
source s_local {
        system();
#!#     system( keep_hostname(no) host_override("localhost") );
#!#     system( keep_hostname(yes) host_override("localhost") );
#!#     system( flags(no-parse) host_override("localhost") );
#!#     system( flags(no-hostname) host_override("localhost") );
#!#     system( flags(no-parse) );
#!#     system( flags(no-hostname) );
#!#     internal( );
};

And nothing worked.

Finally I kinda punted... I am now doing something really kludgy as a work
around:
source s_local {
  system();
  internal( );
};

source s_network {
  udp();
};

destination d_local_template {

file("/data/syslog-ng/$YEAR/$MONTH/$DAY/localhost/localhost.$FACILITY.$PRIORITY.$DATE"
    template("${ISODATE} localhost ${PROGRAM} ${MESSAGE}\n") );
};


destination d_network {

file("/data/syslog-ng/$YEAR/$MONTH/$DAY/$HOST_FROM/$HOST_FROM.$FACILITY.$PRIORITY.$DATE");
};

log {
  source(s_local);
  destination(d_local_template);
};

log {
  source(s_network);
  destination(d_network);
};


---- jrhendri@roadrunner.com wrote:

I have a really odd problem that I hope someone can assist with.

My install is inserting a number of zeroes into the logfile between the

date and the rest of the message.

Here are some details:

System is RHEL:

$ uname -a
Linux vxpip-eeisl001 2.6.32-358.el6.x86_64 #1 SMP Tue Jan 29 11:47:41

EST 2013 x86_64 x86_64 x86_64 GNU/Linux

$


Syslog-ng was built on the box yesterday with these sources:
eventlog-0.2.12+20120504+1700
syslog-ng-3.5.3


$ /usr/local/sbin/syslog-ng --version
syslog-ng 3.5.3
Installer-Version: 3.5.3
Revision: ssh+git://algernon@git.balabit

/var/scm/git/syslog-ng/syslog-ng-ose--mainline--3.5#master#ccb05a22408ba4c837d998b2538854d994f845a5

Compile-Date: Mar 12 2014 11:37:32
Available-Modules:

afmongodb,afstomp,syslogformat,affile,basicfuncs,csvparser,confgen,system-source,afamqp,linux-kmsg-format,afprog,afuser,afsocket,dbparser,cryptofuncs,afsocket-notls

Enable-Debug: off
Enable-GProf: off
Enable-Memtrace: off
Enable-IPv6: on
Enable-Spoof-Source: off
Enable-TCP-Wrapper: off
Enable-Linux-Caps: off
Enable-Pcre: off



This is the default config file that came with it:

#############################################################################

# Default syslog-ng.conf file which collects all local logs into a
# single file called /var/log/messages.
#

@version: 3.5
@include "scl.conf"

source s_local {
        system();
        internal();
};

source s_network {
        udp();
};

destination d_local {
        file("/var/log/messages");
};

log {
        source(s_local);

        # uncomment this line to open port 514 to receive messages
        #source(s_network);
        destination(d_local);
};



Here is the file:


$ sudo file /var/log/messages
/var/log/messages: data
$ sudo cat /var/log/messages
Mar 13 10:43:00  syslog-ng[18451]: syslog-ng starting up; version='3.5.3'
Mar 13 10:43:01  CROND[18454]: (root) CMD (/util/avail/get_avail.sh

1>/util/avail/logs/get_avail.out 2>&1)

Mar 13 10:43:16  sudo: a0142566 : TTY=pts/2 ; PWD=/home/a0142566 ;

USER=root ; COMMAND=/usr/bin/file /var/log/messages

And this is a capture from vi in hex mode on that file.


0000000: 4d61 7220 3133 2031 303a 3433 3a30 3020  Mar 13 10:43:00
0000010: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000020: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000030: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000040: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000050: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000060: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000070: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000080: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000090: 0000 0000 0000 0000 0000 0000 0000 0000  ................
00000a0: 0000 0000 0000 0000 0000 0000 0000 0000  ................
00000b0: 0000 0000 0000 0000 0000 0000 0000 0000  ................
00000c0: 0000 0000 0000 0000 0000 0000 0000 0000  ................
00000d0: 0000 0000 0000 0000 0000 0000 0000 0000  ................
00000e0: 0000 0000 0000 0000 0000 0000 0000 0000  ................
00000f0: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000100: 0000 0000 0000 0000 0000 0000 0000 0020  ...............
0000110: 7379 736c 6f67 2d6e 675b 3138 3435 315d  syslog-ng[18451]
0000120: 3a20 7379 736c 6f67 2d6e 6720 7374 6172  : syslog-ng star
0000130: 7469 6e67 2075 703b 2076 6572 7369 6f6e  ting up; version
0000140: 3d27 332e 352e 3327 0a4d 6172 2031 3320  ='3.5.3'.Mar 13
0000150: 3130 3a34 333a 3031 2000 0000 0000 0000  10:43:01 .......
0000160: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000170: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000180: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000190: 0000 0000 0000 0000 0000 0000 0000 0000  ................
00001a0: 0000 0000 0000 0000 0000 0000 0000 0000  ................
00001b0: 0000 0000 0000 0000 0000 0000 0000 0000  ................
00001c0: 0000 0000 0000 0000 0000 0000 0000 0000  ................
00001d0: 0000 0000 0000 0000 0000 0000 0000 0000  ................
00001e0: 0000 0000 0000 0000 0000 0000 0000 0000  ................
00001f0: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000200: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000210: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000220: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000230: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000240: 0000 0000 0000 0000 0000 0000 0000 0000  ................
0000250: 0000 0000 0000 0000 2043 524f 4e44 5b31  ........ CROND[1
0000260: 3834 3534 5d3a 2028 726f 6f74 2920 434d  8454]: (root) CM
0000270: 4420 282f 7574 696c 2f61 7661 696c 2f67  D (/util/avail/g
0000280: 6574 5f61 7661 696c 2e73 6820 313e 2f75  et_avail.sh 1>/u
0000290: 7469 6c2f 6176 6169 6c2f 6c6f 6773 2f67  til/avail/logs/g
00002a0: 6574 5f61 7661 696c 2e6f 7574 2032 3e26  et_avail.out 2>&
00002b0: 3129 0a4d 6172 2031 3320 3130 3a34 333a  1).


Any ideas?
Thanks in advance folks!!
Jim

______________________________________________________________________________

Member info: https://lists.balabit.hu/mailman/listinfo/syslog-ng
Documentation:

http://www.balabit.com/support/documentation/?product=syslog-ng

FAQ: http://www.balabit.com/wiki/syslog-ng-faq

______________________________________________________________________________
Member info: https://lists.balabit.hu/mailman/listinfo/syslog-ng
Documentation:
http://www.balabit.com/support/documentation/?product=syslog-ng
FAQ: http://www.balabit.com/wiki/syslog-ng-faq

______________________________________________________________________________
Member info: https://lists.balabit.hu/mailman/listinfo/syslog-ng
Documentation: http://www.balabit.com/support/documentation/?product=syslog-ng
FAQ: http://www.balabit.com/wiki/syslog-ng-faq