syslog-ng-debun

syslog-ng-debun — syslog-ng DEBUg buNdle generator

Synopsis

syslog-ng-debun [options]

Description

NOTE: The syslog-ng-debun application is distributed with the syslog-ng OSE system logging application, and is usually part of the syslog-ng OSE package. The latest version of the syslog-ng OSE application is available at the syslog-ng project page.

This manual page is only an abstract, for the complete documentation of syslog-ng, see The syslog-ng Administrator Guide.

The syslog-ng-debun tool collects and saves information about your syslog-ng OSE installation, making troubleshooting easier, especially if you ask help about your syslog-ng OSE related problem.

General Options

-r

Run syslog-ng-debun. Using this option is required to actually execute the data collection with syslog-ng-debun. It is needed to prevent accidentally running syslog-ng-debun.

-h

Display the help page.

-l

Do not collect privacy-sensitive data, for example, process tree, fstab, and so on. If you use with -d, then the following parameters will be used for debug mode:-Fev

-R <directory>

The directory where syslog-ng OSE is installed instead of /opt/syslog-ng.

-W <directory>

Set the working directory, where the debug bundle will be saved. Default value: /tmp. The name of the created file is syslog.debun.${host}.${date}.${3-random-characters-or-pid}.tgz

Debug mode options

-d

Start syslog-ng OSE in debug mode, using the -Fedv --enable-core options.

Warning! Using this option under high message load may increase disk I/O during the debug, and the resulting debug bundle can be huge. To exit debug mode, press Enter.

-D <options>

Start syslog-ng OSE in debug mode, using the specified command-line options. To exit debug mode, press Enter. For details on the available options, see syslog-ng(8).

-t <seconds>

Run syslog-ng OSE in noninteractive debug mode for <seconds>, and automatically exit debug mode after the specified number of seconds.

-w <seconds>

Wait <seconds> seconds before starting debug mode.

System call tracing

-s

Enable syscall tracing (strace -f or truss -f). Note that using -s itself does not enable debug mode, only traces the system calls of an already running syslog-ng OSE process. To trace system calls in debug mode, use both the -s and -d options.

Packet capture options

Capturing packets requires a packet capture tool on the host. The syslog-ng-debun tool attempts to use tcpdump on most platforms, except for Solaris, where it uses snoop.

-i <interface>

Capture packets only on the specified interface, for example, eth0.

-p

Capture incoming packets using the following filter: port 514 or port 601 or port 53

-P <options>

Capture incoming packets using the specified filter.

-t <seconds>

Run syslog-ng OSE in noninteractive debug mode for <seconds>, and automatically exit debug mode after the specified number of seconds.

Examples

syslog-ng-debun -r

Create a simple debug bundle, collecting information about your environment, for example, list packages containing the word: syslog, ldd of your syslog-binary, and so on.

syslog-ng-debun -r -l

Similar to syslog-ng-debun -r, but without privacy-sensitive information. For example, the following is NOT collected: fstab, df output, mount info, ip / network interface configuration, DNS resolv info, and process tree.

syslog-ng-debun -r -d

Similar to syslog-ng-debun -r, but it also stops syslog-ng, then restarts it in debug mode (-Fedv --enable-core). To stop debug mode, press Enter. The output of the debug mode collected into a separate file, and also added to the debug bundle.

syslog-ng-debun -r -s

Trace the system calls (using strace or truss) of an already running syslog-ng OSE process.

syslog-ng-debun -r -d -s

Restart syslog-ng OSE in debug mode, and also trace the system calls (using strace or truss) of the syslog-ng OSE process.

syslog-ng-debun -r -p

Run packet capture (pcap) with the filter: port 514 or port 601 or port 53 Also waits for pressing Enter, like debug mode.

syslog-ng-debun -r -p -t 10

Noninteractive debug mode: Similar to syslog-ng-debun -r -p, but automatically exit after 10 seconds.

syslog-ng-debun -r -P "host 1.2.3.4"  -D "-Fev --enable-core"

Change the packet-capturing filter from the default to host 1.2.3.4. Also change debugging parameters from the default to -Fev --enable-core. Since a timeout (-t) is not given, waits for pressing Enter.

syslog-ng-debun -r -p -d -w 5 -t 10

Collect pcap and debug mode output following this scenario:

  • Start packet capture with default parameters (-p)

  • Wait 5 seconds (-w 5)

  • Stop syslog-ng

  • Start syslog-ng in debug mode with default parameters (-d)

  • Wait 10 seconds (-t 10)

  • Stop syslog-ng debuging

  • Start syslog-ng

  • Stop packet capturing

Files

/opt/syslog-ng/bin/loggen

See also

syslog-ng.conf(5)

Note

For the detailed documentation of syslog-ng OSE see The syslog-ng OSE 3.12 Administrator Guide

If you experience any problems or need help with syslog-ng, visit the syslog-ng mailing list.

For news and notifications about of syslog-ng, visit the syslog-ng blogs.

Author

This manual page was written by the Balabit Documentation Team <documentation@balabit.com>.

Copyright

The authors grant permission to copy, distribute and/or modify this manual page under the terms of the GNU General Public License Version 2 or newer (GPL v2+).