PDBTOOL(1) The pdbtool manual page PDBTOOL(1)NAMEpdbtool - An application to test and convert syslog-ng pattern database
rules
SYNOPSISpdbtool [command] [options]
DESCRIPTION
This manual page is only an abstract; for the complete documentation of
syslog-ng and pdbtool, see The syslog-ng Administrator Guide[1].
The syslog-ng application can match the contents of the log messages to
a database of predefined message patterns (also called patterndb). By
comparing the messages to the known patterns, syslog-ng is able to
identify the exact type of the messages, tag the messages, and sort
them into message classes. The message classes can be used to classify
the type of the event described in the log message. The functionality
of the pattern database is similar to that of the logcheck project, but
the syslog-ng approach is faster, scales better, and is much easier to
maintain compared to the regular expressions of logcheck.
The pdbtool application is a utility that can be used to:
· test message patterns;
· convert an older pattern database to the latest database format;
· merge pattern databases into a single file;
· dump the RADIX tree built from the pattern database (or a part of
it) to explore how the pattern matching works.
THE DUMP COMMAND
dump [options]
Display the RADIX tree built from the patterns. This shows how are the
patterns represented in syslog-ng and it might also help to track down
pattern-matching problems. The dump utility can dump the tree used for
matching the PROGRAM or the MSG parts.
--pdb or -p
Name of the pattern database file to use.
--program or -P
Displays the RADIX tree built from the patterns belonging to the
$PROGRAM application.
--program-tree or -T
Display the $PROGRAM tree.
Example and sample output:
pdbtool dump -p patterndb.xml -P 'sshd'
'p'
'assword for'
@QSTRING:@
'from'
@QSTRING:@
'port '
@NUMBER:@ rule_id='fc49054e-75fd-11dd-9bba-001e6806451b'
' ssh' rule_id='fc55cf86-75fd-11dd-9bba-001e6806451b'
'2' rule_id='fc4b7982-75fd-11dd-9bba-001e6806451b'
'ublickey for'
@QSTRING:@
'from'
@QSTRING:@
'port '
@NUMBER:@ rule_id='fc4d377c-75fd-11dd-9bba-001e6806451b'
' ssh' rule_id='fc5441ac-75fd-11dd-9bba-001e6806451b'
'2' rule_id='fc44a9fe-75fd-11dd-9bba-001e6806451b'
THE MATCH COMMAND
match [options]
Use the match command to test the rules in a pattern database. The
command tries to match the specified message against the patterns of
the database, evaluates the parsers of the pattern, and also displays
which part of the message was parsed successfully. The command returns
with a 0 (success) or 1 (no match) return code and displays the
following information:
· the class assigned to the message (that is, system, violation, and
so on),
· the ID of the rule that matched the message, and
· the values of the parsers (if there were parsers in the matching
pattern).
The match command has the following options:
--color-out or -c
Color the terminal output to highlight the part of the message that
was successfully parsed.
--debug-csv or -C
Print the debugging information returned by the --debug-pattern
option as comma-separated values.
--debug-pattern or -D
Print debugging information about the pattern matching. See also
the --debug-csv option.
--file=<filename-with-path> or -f
Process the messages of the specified log file with the pattern
database. This option allows to classify messages offline, and to
apply the pattern database to already existing logfiles. To read
the messages from the standard input (stdin), specify a hyphen (-)
character instead of a filename.
--filter=<filter-expression> or -F
Print only messages matching the specified syslog-ng filter
expression.
--message or -M
The text of the log message to match (only the $MESSAGE part
without the syslog headers).
--pdb or -p
Name of the pattern database file to use.
--program or -P
Name of the program to use, as contained in the $PROGRAM part of
the syslog message.
--template=<template-expression> or -T
A syslog-ng template expression that is used to format the output
messages.
Example: The following command checks if the patterndb.xml file
recognizes the Accepted publickey for myuser from 127.0.0.1 port 59357
ssh2 message:
pdbtool match -p patterndb.xml -P sshd -M "Accepted publickey for myuser from 127.0.0.1 port 59357 ssh2"
The following example applies the sshd.pdb pattern database file to the
log messages stored in the /var/log/messages file, and displays only
the messages that received a useracct tag.
pdbtool match -p sshd.pdb \
–file /var/log/messages \
–filter ‘tags(“usracct”);’
THE MERGE COMMAND
merge [options]
Use the merge command to combine separate pattern database files into a
single file (pattern databases are usually stored in separate files per
applications to simplify maintenance). If a file uses an older database
format, it is automatically updated to the latest format (V3). See the
The syslog-ng Administrator Guide[1] for details on the different
pattern database versions.
--directory or -D
The directory that contains the pattern database XML files to be
merged.
--glob or -G
Specify filenames to be merged using a glob pattern, for example,
using wildcards. For details on glob patterns, see man glob. This
pattern is applied only to the filenames, and not on directory
names.
--pdb or -p
Name of the output pattern database file.
--recursive or -r
Merge files from subdirectories as well.
Example:
pdbtool merge --recursive --directory /home/me/mypatterns/ --pdb /var/lib/syslog-ng/patterndb.xml
Currently it is not possible to convert a file without merging, so if
you only want to convert an older pattern database file to the latest
format, you have to copy it into an empty directory.
THE PATTERNIZE COMMAND
patternize [options]
Automatically create a pattern database from a log file containing a
large number of log messages. The resulting pattern database is printed
to the standard output (stdout). The pdbtool patternize command uses a
data clustering technique to find similar log messages and replacing
the differing parts with @ESTRING:: @ parsers. For details on pattern
databases and message parsers, see the The syslog-ng Administrator
Guide[1]. The patternize command is available only in syslog-ng OSE
version 3.2 and later.
--file=<path> or -f
The logfile containing the log messages to create patterns from. To
receive the log messages from the standard input (stdin), use -.
--iterate-outliers or -o
Recursively iterate on the log lines to cover as many log messages
with patterns as possible.
--named-parsers or -n
The number of example log messages to include in the pattern
database for every pattern. Default value: 1
--samples=<number-of-samples>
Include a generated name in the parsers, for example,
.dict.string1, .dict.string2, and so on.
--support=<number> or -S
A pattern is added to the output pattern database if at least the
specified percentage of log messages from the input logfile match
the pattern. For example, if the input logfile contains 1000 log
messages and the --support=3.0 option is used, a pattern is created
only if the pattern matches at least 3 percent of the log messages
(that is, 30 log messages). If patternize does not create enough
patterns, try to decrease the support value.
Default value: 4.0
Example:
pdbtool patternize --support=2.5 --file=/var/log/messages
THE TEST COMMAND
test [options]
Use the test command to validate a pattern database XML file. Note that
you must have the xmllint application installed. The test command is
available only in syslog-ng OSE version 3.2 and later.
--validate
Validate a pattern database XML file.
Example:
pdbtool test --validate /home/me/mypatterndb.pdb
FILES
/usr/local/bin/pdbtool
/usr/local/etc/syslog-ng/syslog-ng.conf
SEE ALSO
The syslog-ng Administrator Guide[1]
syslog-ng.conf(5)syslog-ng(8)
The syslog-ng OSE 3.3 Administrator Guide[1]
If you experience any problems or need help with syslog-ng, visit visit
the syslog-ng wiki[2] or the syslog-ng mailing list[3].
For news and notifications about of syslog-ng, visit the syslog-ng
Insider Blog[4].
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+).
NOTES
1.
The syslog-ng Administrator Guide
http://www.balabit.com/support/documentation/
2. visit the syslog-ng wiki
http://www.balabit.com/wiki/syslog-ng-faq
3. syslog-ng mailing list
https://lists.balabit.hu/mailman/listinfo/syslog-ng
4. syslog-ng Insider Blog
http://insider.blogs.balabit.com
syslog-ng Open Source Edition 10/27/2015 PDBTOOL(1)
