NAME

       ds-logpipe.py - Create and read from a named pipe instead of a log file

SYNOPSIS

       ds-logpipe.py /full/path/to/namedpipe
              [-m   maxlinestobuffer]   [-u   userid]   [-s   serverpidfile]  [-t  servertimeout]
       [--plugin=/path/to/pluginfile.py] [pluginfile.arg=value]

DESCRIPTION

       The Named Pipe Log Script allows you to replace a log file with a named pipe attached to a
       script. The server can then send the log output to a script instead of to a log file. This
       allows you to do many different things such as:

        * log only certain events e.g. failed binds, connections from certain ip addresses, etc.
        * log only lines that match a certain pattern
        * log only the last N lines -  useful  for  enabling  full  error  log  debug  levels  in
       production environments
        * send an email or other notification when a certain event is detected

       The  script  is written in python, and allows plugins. By default, the script will log the
       last N lines (default 1000). There are two plugins provided - one to log only failed  bind
       attempts, and one that will log only lines that match given regular expressions.

OPTIONS

       A summary of options is included below.

       /full/path/to/namedpipe
              Required  -  full  path and file name of the named pipe. If this does not exist, it
              will be created.  If it exists and is a named pipe, the script will use it.  If  it
              exists and is not a pipe, the script will abort.  The ownership will be the same as
              the user running the script (or see the -u option below).

       -m|--maxlines=N
              Number of lines to buffer - default is 1000

       -u|--userid=user
              The pipe and any other files created by  the  script  will  be  chown()'d  to  this
              userid.  This may be a string userid name or a numeric userid value.

       -s|--serverpidfile=/path/to/servername.pid
              If  you  want the script to exit when a particular directory server exists, specify
              the full path to the file containing  the  server  pid.   The  default  is  usually
              something  like  /var/run/dirsrv/slapd-<instancename>.pid  where  <instancename> is
              usually the hostname

       -t|--servertimeout=N
              Since the serverpidfile may not exist yet when the script is run, the  script  will
              wait  by default 60 seconds for the pid file to exist and the server to be started.
              Use this option to specify a different timeout. The -t  option  only  applies  when
              using -s or --serverpid - otherwise it does nothing.

       --serverpid=P
              IF  the  server you want to track is already running, you can specify it using this
              argument.  If the specified pid is not valid, the script will abort.

       -p|--plugin=/full/path/to/pluginname.py
              Specify a plugin to use.  The plugin must be a python file and must end in .py.  It
              must  specify  a  function  called  plugin and may specify functions called pre and
              post.

       pluginname.arg1=value ... pluginname.argN=value
              You can specify arguments to plugins on the command line.  If  there  is  a  plugin
              specified  as  --plugin=/full/path/to/pluginname.py,  the arguments for that plugin
              are specified as pluginname.argname=value.  The script parses these  arguments  and
              passes them to the plugin pre function as a python dict.  IF there is more than one
              argument named pluginname.argname the values are passed as a python list.

DIRECTORY SERVER NOTES

       The directory server will usually need to be configured to log to the named  pipe  instead
       of  the usual log file.  For example, use the following LDIF to tell the server to use the
       file access.pipe for the access log:
        dn: cn=config
        changetype: modify
        replace: nsslapd-accesslog-maxlogsperdir
        nsslapd-accesslog-maxlogsperdir: 1
        -
        replace: nsslapd-accesslog-logexpirationtime
        nsslapd-accesslog-logexpirationtime: -1
        -
        replace: nsslapd-accesslog-logrotationtime
        nsslapd-accesslog-logrotationtime: -1
        -
        replace: nsslapd-accesslog
        nsslapd-accesslog: /var/log/dirsrv/slapd-localhost/access.pipe
        -
        replace: nsslapd-accesslog-logbuffering
        nsslapd-accesslog-logbuffering: off

       NOTE: Before doing this, you should save your current configuration so you can restore  it
       later.
        ldapsearch  ... -s base -b "cn=config" nsslapd-accesslog-maxlogsperdir nsslapd-accesslog-
       logexpirationtime   nsslapd-accesslog-logrotationtime nsslapd-accesslog  nsslapd-accesslog
       > savedaccesslog.ldif

       The  error  log  and audit log have similarly named configuration attributes e.g. nsslapd-
       errorlog, nsslapd-auditlog.  Note that the audit log is disabled by default - use nsslapd-
       auditlog-logging-enabled: on to enable it.

AUTHOR

       ds-logpipe.py was written by the 389 Project.

REPORTING BUGS

       Report bugs to http://bugzilla.redhat.com.

COPYRIGHT

       Copyright © 2009 Red Hat, Inc.
       This is free software.  You may redistribute copies of it under the terms of the Directory
       Server license found in the LICENSE file of this software distribution.  This  license  is
       essentially  the  GNU  General  Public  License  version  2  with an exception for plug-in
       distribution.

                                        November 24, 2009                        DS-LOGPIPE.PY(1)