Fuglu has various places where you can see what it is is currently doing (eg. for debugging purposes) or what it has done (for statistical analysis)

Command Line Interface

The fuglu_control command offers various options to get real-time information on fuglu internals


#$ fuglu_control stats
Fuglu statistics
Uptime:         19:33:56.119661
Avg scan time:  3.9657
Total msgs:     86667
Ham:            547
Spam:           86124
Virus:          8

Status of currently running scanner threads:

#fuglu_control workerlist
Total 10 Threads

[98]: Suspect 8790fa16a3733350baf02d5b4e7d98e1: from=<redacted> to=<redacted> size=1043 , spam=no, virus=no tags={'virus': {'F-Prot': False, 'ClamAV': False}, 'FprotPlugin.time': '0.0080', 'spam': {}, 'incomingport': 10025, 'decisions': [('F-Prot Plugin', 0), ('ClamavPlugin', 0)], 'ClamavPlugin.time': '0.0055'} : Running Plugin SAPlugin
[99]: Suspect b6f3019df4da4170888e144f98eaa3ad: from=<redacted> to=<redacted> size=5187 , spam=no, virus=no tags={'virus': {'F-Prot': False, 'ClamAV': False}, 'FprotPlugin.time': '0.0088', 'spam': {}, 'incomingport': 10025, 'decisions': [('F-Prot Plugin', 0), ('ClamavPlugin', 0)], 'ClamavPlugin.time': '0.0161'} : Running Plugin SAPlugin
[100]: waiting for task
[101]: Suspect eefa38e4ae4a9c2938670a46d6b2b922: from=<redacted> to=<redacted> size=5203 , spam=no, virus=no tags={'virus': {'F-Prot': False, 'ClamAV': False}, 'FprotPlugin.time': '0.0086', 'spam': {}, 'incomingport': 10025, 'decisions': [('F-Prot Plugin', 0), ('ClamavPlugin', 0)], 'ClamavPlugin.time': '0.0092'} : Running Plugin SAPlugin
[102]: waiting for task
[103]: waiting for task
[104]: waiting for task
[105]: waiting for task
[106]: Suspect b47e2ebf00e3f0d83dc1c7f64dad69e8: from=<redacted> to=<redacted> size=29442 , spam=no, virus=no tags={'virus': {'F-Prot': False, 'ClamAV': False}, 'FprotPlugin.time': '0.0240', 'spam': {}, 'incomingport': 10025, 'decisions': [('F-Prot Plugin', 0), ('ClamavPlugin', 0)], 'ClamavPlugin.time': '0.0240'} : Running Plugin SAPlugin
[107]: waiting for task

Run fuglu_control without arguments to get a list of all supported commands.


Fuglu writes to /var/log/fuglu/fuglu.log by default. A summary of each analyzed message is stored in that file immediately after it has been analyzed..

Fuglu uses the standard python logging framework. This allows you to configure logging for each plugin individually (verbosity, own logfile, …)

Full documentation on the python logging configuration: http://docs.python.org/library/logging.html#configuring-logging

Logging is configured in /etc/fuglu/logging.conf

In standard configuration, fuglu logs only INFO messages. Let’s say you wanted to debug the spamassassin plugin. So you’d check if there is a section dealing with spamassassin and you’d find this:


You would change level=INFO to level=DEBUG. Also you need to activate this special configuration for spamassassin by adding it to the loggers section at the top of the file:


After reloading fuglu, the spamassassin plugin should be very verbose:

2009-04-08 17:11:07,693 fuglu.plugin.SAPlugin: DEBUG Contacting spamd localhost (Try 1 of 5)
2009-04-08 17:11:07,701 fuglu.plugin.SAPlugin: DEBUG Sent 4065 bytes to spamd
2009-04-08 17:11:10,033 fuglu.plugin.SAPlugin: DEBUG SPAMD/1.1 0 EX_OK

2009-04-08 17:11:10,034 fuglu.plugin.SAPlugin: DEBUG Got 4778 message bytes from back from spamd
2009-04-08 17:11:10,047 fuglu.plugin.SAPlugin: DEBUG Spamscore: 2.2
2009-04-08 17:11:10,047 fuglu.plugin.SAPlugin: DEBUG Message is not spam

There should be logger sections configured for most tasks / plugins, if not, do not hesitate to open a bug on this.

Qualnames for new loggers :

Plugins usually use fuglu.plugin.<classname>

fuglu internal qualnames:

  • fuglu.SessionHandler - What plugins are being run, what are the results, …
  • fuglu.smtp.incoming - Incoming smtp connections
  • fuglu.smtp.incoming.<portnumber> - Incoming smtp sessions on port <portnumber>
  • fuglu.smtpsession - information on the incoming smtp transaction
  • fuglu.threadpool - information when threads are created / destroyed
  • fuglu.suspectfilter - debug info on parsing/applying the special header filter config files

Additional handlers

In addition to python’s builtin handlers , fuglu supports:

  • custom_handlers.GroupReadableRotatingFileHandler - Like python’s RotatingFileHandler , but the file is readable by fuglu’s group
  • custom_handlers.GroupWritableRotatingFileHandler - Like python’s RotatingFileHandler , but the file is readable/writable by fuglu’s group
  • custom_handlers.GroupReadableTimedRotatingFileHandler - Like python’s TimedRotatingFileHandler , but the file is readable by fuglu’s group
  • custom_handlers.GroupWritableTimedRotatingFileHandler - Like python’s TimedRotatingFileHandler, but the file is readable/writable by fuglu’s group


Fuglu can be configured to peridically write status files readable by mrtg. To do this, you only have to create a new directory (eg /usr/local/fuglu/mrtg) and set this in fuglu.conf:


You’ll need mrtg and a webserver for this to work… create a file called /etc/fuglu/fuglu_mrtg.cfg like this:

Interval: 5
WorkDir: /usr/local/fuglu/mrtg/output
WriteExpires: yes
Options[_]: growright,nopercent
LogFormat: rrdtool

Target[inout]: `cat /usr/local/fuglu/mrtg/inout`
PageTop[inout]: <H1>Messages in/out</H1>
Options[inout]: growright,nopercent
Title[inout]: Messages in/out
ShortLegend[inout]: msgs/s
YLegend[inout]: messages
LegendI[inout]: in
Legend1[inout]: Incoming Messages
Legend2[inout]: Messages re-injected
LegendO[inout]: re-inject
MaxBytes[inout]: 60000000

Target[hamspam]: `cat /usr/local/fuglu/mrtg/hamspam`
Options[hamspam]: growright,nopercent
Title[hamspam]: Ham / Spam
PageTop[hamspam]: <H1>Ham / Spam</H1>
YLegend[hamspam]: messages/second
ShortLegend[hamspam]: msgs/s
LegendI[hamspam]: ham
Legend1[hamspam]: Clean Messages (ham)
LegendO[hamspam]: spam
Legend2[hamspam]: Messages detected as spam
MaxBytes[hamspam]: 600000
AbsMax[hamspam]: 600000

Target[scantime]: `cat /usr/local/fuglu/mrtg/scantime`
Options[scantime]: growright,nopercent,gauge
Title[scantime]: Scan Time
PageTop[scantime]: <H1>Scan Time</H1>
WithPeak[scantime]: ymwd
YLegend[scantime]: sec
ShortLegend[scantime]: sec
Legend1[scantime]: Time needed to analyze message
LegendI[scantime]: scantime
Legend3[scantime]: Peak Scantime
MaxBytes[scantime]: 600000
AbsMax[scantime]: 600000

Target[threads]: `cat /usr/local/fuglu/mrtg/threads`
Options[threads]: growright,nopercent,gauge
Title[threads]: Threads
PageTop[threads]: <H1>Running Threads</H1>
YLegend[threads]: threads
ShortLegend[threads]: threads
Legend1[threads]: Number of running threads
LegendI[threads]: threads
MaxBytes[threads]: 600000
AbsMax[threads]: 600000

Target[virus]: `cat /usr/local/fuglu/mrtg/virus`
Options[virus]: growright,nopercent
Title[virus]: virus
PageTop[virus]: <H1>Virus</H1>
YLegend[virus]: virus
ShortLegend[virus]: virus
#LegendO[virus]: virus
LegendI[virus]: virus
Legend1[virus]: Number of viri detected
MaxBytes[virus]: 600000
AbsMax[virus]: 600000

Make sure, the path in WorkDir exists.

Then create a script /usr/local/bin/fuglu_mrtg.sh

/usr/bin/env LANG=C /usr/bin/mrtg /etc/fuglu/fuglu_mrtg.cfg

run fuglu_mrtg.sh to check for errors.

If all went well, add it to your crontab:

*/5 * * * * /usr/local/bin/fuglu_mrtg.sh >/dev/null 2>&1

install mrtg-rrd.cgi (probably rename it to fuglu.cgi ), and configure the path to fuglu_mrtg.cfg correctly:

# EDIT THIS to reflect all your MRTG config files
BEGIN { @config_files = qw(/etc/fuglu/fuglu_mrtg.cfg); }

after pointing your browser to http://yourfuglubox.example.com/cgi-bin/fuglu.cgi you should see nice graphs.


In case you are interested to know timings for processings messages there is one logger dedicated to summarize timings spent in plugins (PLG), prependers (PRE), appenders (APP) and for the remaining work. Time is given in seconds. To enable timing output, modify “/etc/fuglu/logging.conf”. If you don’t have a “logging.conf” copy the template “logging.conf.dist” which should also be located in “/etc/fuglu/”. Besides the “root” logger and its configuration, make sure you have “timing” in loggers, “timingfile” in handlers and “timelogfileformatter” in “formatters”. Timing output verbosity can be set by level=ERROR/INFO/DEBUG in “logger_timing” which will create no/basic/detailed timing output in the log file. Example:





#to enable timing for message processing
#set level=INFO (plugin timings + overhead) or LEVEL=DEBUG (plugin timings + overhead details)



format=%(asctime)s %(name)-12s: %(levelname)s %(message)s

format=%(asctime)s %(name)-12s: %(levelname)s %(message)s

In the fuglu main config, enable scantime logging in the main section setting the variable “scantimelogger” to 1. The default is 0, so a config file without this option will not log scantime even if the “timings” logger is defind “logging.conf”. This is to prevent a lot unwanted log messages using an older log config.

# scantime logger disabled
# -> after enable also configure logger in logging.conf
scantimelogger = 1

Restart fuglu after all the changes. Then sending a test mail creates timing output like:

2018-08-28 15:59:06,200: INFO id: 215d440de4f64a08bc67d93dd92153d2, total: 0.652
2018-08-28 15:59:06,200: INFO id: 215d440de4f64a08bc67d93dd92153d2, overhead: 0.623
2018-08-28 15:59:06,200: INFO id: 215d440de4f64a08bc67d93dd92153d2, (PRE) Debugger: 0.002
2018-08-28 15:59:06,200: INFO id: 215d440de4f64a08bc67d93dd92153d2, (PRE) Plugin Skipper: 0.009
2018-08-28 15:59:06,200: INFO id: 215d440de4f64a08bc67d93dd92153d2, (PLG) Clam AV: 0.018

and with “loglevel=DEBUG”

2018-08-28 16:01:42,501: INFO id: 2110074a6a3d4d24b2650e0c1c171105, total: 0.840
2018-08-28 16:01:42,501: INFO id: 2110074a6a3d4d24b2650e0c1c171105, overhead: 0.820
2018-08-28 16:01:42,501: INFO id: 2110074a6a3d4d24b2650e0c1c171105, (PRE) Debugger: 0.001
2018-08-28 16:01:42,501: INFO id: 2110074a6a3d4d24b2650e0c1c171105, (PRE) Plugin Skipper: 0.002
2018-08-28 16:01:42,501: INFO id: 2110074a6a3d4d24b2650e0c1c171105, (PLG) Clam AV: 0.017
2018-08-28 16:01:42,501: DEBUG id: 2110074a6a3d4d24b2650e0c1c171105, SessionHandler-Setup: 0.000
2018-08-28 16:01:42,501: DEBUG id: 2110074a6a3d4d24b2650e0c1c171105, Message-Receive-Suspect: 0.749
2018-08-28 16:01:42,501: DEBUG id: 2110074a6a3d4d24b2650e0c1c171105, Before-Prependers: 0.004
2018-08-28 16:01:42,501: DEBUG id: 2110074a6a3d4d24b2650e0c1c171105, Before-Plugins: 0.000
2018-08-28 16:01:42,501: DEBUG id: 2110074a6a3d4d24b2650e0c1c171105, Adding-Headers: 0.000
2018-08-28 16:01:42,502: DEBUG id: 2110074a6a3d4d24b2650e0c1c171105, Debug-Suspect: 0.000
2018-08-28 16:01:42,502: DEBUG id: 2110074a6a3d4d24b2650e0c1c171105, Commitback: 0.066
2018-08-28 16:01:42,502: DEBUG id: 2110074a6a3d4d24b2650e0c1c171105, Increase-Stats: 0.000
2018-08-28 16:01:42,502: DEBUG id: 2110074a6a3d4d24b2650e0c1c171105, Increase-Counters: 0.000
2018-08-28 16:01:42,502: DEBUG id: 2110074a6a3d4d24b2650e0c1c171105, Before-Appenders: 0.000
2018-08-28 16:01:42,502: DEBUG id: 2110074a6a3d4d24b2650e0c1c171105, Remove-tempfile: 0.000
2018-08-28 16:01:42,502: DEBUG id: 2110074a6a3d4d24b2650e0c1c171105, Ending: 0.000

In this small example most of the time is overhead (Message-Receive-Suspect).


Default example is for writing the timing into a separate file “/var/log/fuglu/timing.log”. If output is to syslog, make be aware by default there is a limit for log messages, see link or link which might make timing information useless if not disabled.

Example: Fuglu timinig with Postfix

This example show how to extract information using the timing described before. Configuration is Postfix with FUGLU as after-queue filter. Fuglu runs in multiprocessing mode with 4 processes. The test consists in sending 24 messages using 8 threads. Timing output looks like:

2018-08-28 16:32:08,565: INFO id: bbab7ef5a2974972aac6e5e5abdcbb81, total: 1.614
2018-08-28 16:32:08,654: INFO id: 214155f0242c462394fdc7f9cd52471f, total: 1.756
2018-08-28 16:32:08,759: INFO id: fda3c032e9a245fca0cb96f9f1c08006, total: 2.053
2018-08-28 16:32:08,866: INFO id: b02ef668164548ad8e1c43bbd3c0e3a4, total: 1.730
2018-08-28 16:32:09,418: INFO id: 083a13a28bd1440b8739f3802f555e3e, total: 0.845
2018-08-28 16:32:09,421: INFO id: f730d1ce028d49d5a515b2c3e6730ed5, total: 0.734
2018-08-28 16:32:09,501: INFO id: a1e880d8871641d18fb8b93129ca82b7, total: 0.705
2018-08-28 16:32:09,796: INFO id: 73412cb75a4342c6a10d8b83794a25c5, total: 0.890
2018-08-28 16:32:10,175: INFO id: ee8f753cb2d24ca3b1e80972363c25ba, total: 0.724
2018-08-28 16:32:10,174: INFO id: ba806290932845c299f9dc77340d7a0e, total: 0.652
2018-08-28 16:32:10,211: INFO id: e044a9836d264f768cb67769331aec3f, total: 0.759
2018-08-28 16:32:10,520: INFO id: aabe6169c7fe408983f03d9589737942, total: 0.686
2018-08-28 16:32:10,896: INFO id: 6064a0689f414849a5b13dfbe22885fa, total: 0.679
2018-08-28 16:32:10,907: INFO id: a6a09f5dca6849edbaa08fd91a85a3c0, total: 0.705
2018-08-28 16:32:12,394: INFO id: 4983965b0d9e468e9dad4c67ea2abc32, total: 2.128
2018-08-28 16:32:13,737: INFO id: 75f63480574849c5819006a5dba0c3c3, total: 2.820
2018-08-28 16:32:13,744: INFO id: c796aba4879447efa289b16fc24d4984, total: 2.826
2018-08-28 16:32:13,756: INFO id: a84ae0b77c1d43adbb1ecefd9d894588, total: 3.208
2018-08-28 16:32:14,289: INFO id: 0d2bcc7ef9014b2886ef67f6287e109a, total: 1.882
2018-08-28 16:32:16,965: INFO id: 6d8090e23ce54095969f1ac05c4bf80a, total: 3.200
2018-08-28 16:32:16,972: INFO id: d06f4c5c4ae84fc096d8b98f6b7e101a, total: 3.203
2018-08-28 16:32:16,975: INFO id: 55543848dee447579b2e57f0d665fe9b, total: 2.668
2018-08-28 16:32:16,991: INFO id: 6d84ccebf51c46fdb213a9f497eb2cb5, total: 3.227
2018-08-28 16:32:19,390: INFO id: 475786e12faa4eb580cd2ee79d5d3cef, total: 2.406

In this output and also if more messages are sent, typically the following behavior can be observed: - First 4 messages need more time compared to the ones in the middle - Last 10 messages need more time compared to the ones sent in the middle

Checking the plugin time reveals why the first 4 messages need more time:

2018-08-28 16:32:08,566: INFO id: bbab7ef5a2974972aac6e5e5abdcbb81, (PLG) URIExtract: 0.288
2018-08-28 16:32:08,655: INFO id: 214155f0242c462394fdc7f9cd52471f, (PLG) URIExtract: 0.484
2018-08-28 16:32:08,760: INFO id: fda3c032e9a245fca0cb96f9f1c08006, (PLG) URIExtract: 0.537
2018-08-28 16:32:08,871: INFO id: b02ef668164548ad8e1c43bbd3c0e3a4, (PLG) URIExtract: 0.379
2018-08-28 16:32:09,419: INFO id: 083a13a28bd1440b8739f3802f555e3e, (PLG) URIExtract: 0.053
2018-08-28 16:32:09,422: INFO id: f730d1ce028d49d5a515b2c3e6730ed5, (PLG) URIExtract: 0.035
2018-08-28 16:32:09,502: INFO id: a1e880d8871641d18fb8b93129ca82b7, (PLG) URIExtract: 0.030
2018-08-28 16:32:09,818: INFO id: 73412cb75a4342c6a10d8b83794a25c5, (PLG) URIExtract: 0.019
2018-08-28 16:32:10,175: INFO id: ba806290932845c299f9dc77340d7a0e, (PLG) URIExtract: 0.036
2018-08-28 16:32:10,176: INFO id: ee8f753cb2d24ca3b1e80972363c25ba, (PLG) URIExtract: 0.019
2018-08-28 16:32:10,212: INFO id: e044a9836d264f768cb67769331aec3f, (PLG) URIExtract: 0.016
2018-08-28 16:32:10,521: INFO id: aabe6169c7fe408983f03d9589737942, (PLG) URIExtract: 0.048
2018-08-28 16:32:10,896: INFO id: 6064a0689f414849a5b13dfbe22885fa, (PLG) URIExtract: 0.026
2018-08-28 16:32:10,908: INFO id: a6a09f5dca6849edbaa08fd91a85a3c0, (PLG) URIExtract: 0.030
2018-08-28 16:32:12,396: INFO id: 4983965b0d9e468e9dad4c67ea2abc32, (PLG) URIExtract: 0.014
2018-08-28 16:32:13,738: INFO id: 75f63480574849c5819006a5dba0c3c3, (PLG) URIExtract: 0.016
2018-08-28 16:32:13,745: INFO id: c796aba4879447efa289b16fc24d4984, (PLG) URIExtract: 0.018
2018-08-28 16:32:13,757: INFO id: a84ae0b77c1d43adbb1ecefd9d894588, (PLG) URIExtract: 0.018
2018-08-28 16:32:14,290: INFO id: 0d2bcc7ef9014b2886ef67f6287e109a, (PLG) URIExtract: 0.016
2018-08-28 16:32:16,966: INFO id: 6d8090e23ce54095969f1ac05c4bf80a, (PLG) URIExtract: 0.015
2018-08-28 16:32:16,973: INFO id: d06f4c5c4ae84fc096d8b98f6b7e101a, (PLG) URIExtract: 0.051
2018-08-28 16:32:16,976: INFO id: 55543848dee447579b2e57f0d665fe9b, (PLG) URIExtract: 0.015
2018-08-28 16:32:16,992: INFO id: 6d84ccebf51c46fdb213a9f497eb2cb5, (PLG) URIExtract: 0.036
2018-08-28 16:32:19,391: INFO id: 475786e12faa4eb580cd2ee79d5d3cef, (PLG) URIExtract: 0.016

The reason is in the beginning the URIExtract plugin loads domain skip lists from a file. Every one of the 4 worker processes available is loading the file in the beginning therefore the plugin needs more time.

2018-08-28 16:32:08,567: DEBUG id: bbab7ef5a2974972aac6e5e5abdcbb81, Commitback: 0.052
2018-08-28 16:32:08,656: DEBUG id: 214155f0242c462394fdc7f9cd52471f, Commitback: 0.059
2018-08-28 16:32:08,761: DEBUG id: fda3c032e9a245fca0cb96f9f1c08006, Commitback: 0.111
2018-08-28 16:32:08,892: DEBUG id: b02ef668164548ad8e1c43bbd3c0e3a4, Commitback: 0.053
2018-08-28 16:32:09,420: DEBUG id: 083a13a28bd1440b8739f3802f555e3e, Commitback: 0.081
2018-08-28 16:32:09,424: DEBUG id: f730d1ce028d49d5a515b2c3e6730ed5, Commitback: 0.021
2018-08-28 16:32:09,503: DEBUG id: a1e880d8871641d18fb8b93129ca82b7, Commitback: 0.047
2018-08-28 16:32:09,824: DEBUG id: 73412cb75a4342c6a10d8b83794a25c5, Commitback: 0.091
2018-08-28 16:32:10,176: DEBUG id: ba806290932845c299f9dc77340d7a0e, Commitback: 0.052
2018-08-28 16:32:10,178: DEBUG id: ee8f753cb2d24ca3b1e80972363c25ba, Commitback: 0.050
2018-08-28 16:32:10,214: DEBUG id: e044a9836d264f768cb67769331aec3f, Commitback: 0.057
2018-08-28 16:32:10,522: DEBUG id: aabe6169c7fe408983f03d9589737942, Commitback: 0.088
2018-08-28 16:32:10,908: DEBUG id: 6064a0689f414849a5b13dfbe22885fa, Commitback: 0.043
2018-08-28 16:32:10,909: DEBUG id: a6a09f5dca6849edbaa08fd91a85a3c0, Commitback: 0.068
2018-08-28 16:32:12,399: DEBUG id: 4983965b0d9e468e9dad4c67ea2abc32, Commitback: 1.493
2018-08-28 16:32:13,740: DEBUG id: 75f63480574849c5819006a5dba0c3c3, Commitback: 2.403
2018-08-28 16:32:13,747: DEBUG id: c796aba4879447efa289b16fc24d4984, Commitback: 2.350
2018-08-28 16:32:13,759: DEBUG id: a84ae0b77c1d43adbb1ecefd9d894588, Commitback: 2.709
2018-08-28 16:32:14,291: DEBUG id: 0d2bcc7ef9014b2886ef67f6287e109a, Commitback: 1.582
2018-08-28 16:32:16,967: DEBUG id: 6d8090e23ce54095969f1ac05c4bf80a, Commitback: 2.663
2018-08-28 16:32:16,977: DEBUG id: 55543848dee447579b2e57f0d665fe9b, Commitback: 2.342
2018-08-28 16:32:16,987: DEBUG id: d06f4c5c4ae84fc096d8b98f6b7e101a, Commitback: 2.675
2018-08-28 16:32:16,993: DEBUG id: 6d84ccebf51c46fdb213a9f497eb2cb5, Commitback: 2.675
2018-08-28 16:32:19,393: DEBUG id: 475786e12faa4eb580cd2ee79d5d3cef, Commitback: 2.076

“Commitback” includes re_inject of the message into the queue and sending back an answer to postfix who sent the mail to Fuglu. Independent of sending 24 or 100 messages the last 10 messages took more time. The reason for this is actually a postfix caching configuration (http://www.postfix.org/CONNECTION_CACHE_README.html). Disable connection caching in Postfix (“smtp_connection_cache_on_demand = no” in “”/etc/postfix/main.cf”) provides a more uniform time for “Commitback”:

2018-08-28 17:10:17,813: DEBUG id: cd1f24aa3fb64f34b0f38172977d66c0, Commitback: 0.067
2018-08-28 17:10:19,331: DEBUG id: 0bc7907f82d94804bd98dd1c5c19049c, Commitback: 0.079
2018-08-28 17:10:19,763: DEBUG id: 6fd3f6b6f2bd4d929ba088eca1e07909, Commitback: 0.062
2018-08-28 17:10:19,946: DEBUG id: 678641c3c0584801b042ca74daba7e3e, Commitback: 0.030
2018-08-28 17:10:19,966: DEBUG id: 0fd25ee5d5b3469a83bc9ef6b1c4740d, Commitback: 0.090
2018-08-28 17:10:20,040: DEBUG id: f4019147caf648158c44b5700bf34558, Commitback: 0.060
2018-08-28 17:10:20,576: DEBUG id: 79342b19ac6346669f78deee0404f5c1, Commitback: 0.028
2018-08-28 17:10:20,670: DEBUG id: aef87d19cd4049b2a08ba09e7aaa0d6b, Commitback: 0.028
2018-08-28 17:10:20,714: DEBUG id: 03ba346c27e8458bbe8a674fa9688e4e, Commitback: 0.058
2018-08-28 17:10:20,806: DEBUG id: e16ad58c734f48baaf6061bdcdc60d19, Commitback: 0.059
2018-08-28 17:10:21,295: DEBUG id: 3381c75f19b048c59fb792fe1c8477a6, Commitback: 0.048
2018-08-28 17:10:21,377: DEBUG id: 6143066549af418bae03219fecb8d6ed, Commitback: 0.023
2018-08-28 17:10:21,511: DEBUG id: 44c964366b14498caefcee242084e37d, Commitback: 0.080
2018-08-28 17:10:21,606: DEBUG id: 82106780e343426b987de889a982b6e8, Commitback: 0.054
2018-08-28 17:10:22,046: DEBUG id: 446e28b2583b4acfb0dcc9d442d80694, Commitback: 0.019
2018-08-28 17:10:22,063: DEBUG id: f1cb4fd140534380ac4a7d7f8dbfb955, Commitback: 0.020
2018-08-28 17:10:22,122: DEBUG id: 02f1766b1efa467f99eccb8ddecb4d0d, Commitback: 0.017
2018-08-28 17:10:22,214: DEBUG id: 5f9ca7c40e5f4abbbbb857f578206234, Commitback: 0.047
2018-08-28 17:10:22,826: DEBUG id: 859a069e3b364f418fc00db62a9774c2, Commitback: 0.020
2018-08-28 17:10:22,874: DEBUG id: 0d6ddc0e151c40c0a06c40621a108314, Commitback: 0.015
2018-08-28 17:10:22,902: DEBUG id: ce03db18ce564a1093d119a514493c3f, Commitback: 0.023
2018-08-28 17:10:23,007: DEBUG id: be9cd141a5244488b8b918acc466b413, Commitback: 0.057
2018-08-28 17:10:23,304: DEBUG id: 29cda3659cda4d52b3dc2dadfc5e116d, Commitback: 0.020
2018-08-28 17:10:23,349: DEBUG id: b1885d2585da4a75b31b32fc5412803b, Commitback: 0.011

In general caching should reduce the time per mail, in the present small example it is however not so clear since the total time with caching disabled is similar to the one with caching or it might even be the same. This might be due to the fact the connection Postfix-Fuglu is only local.

2018-08-28 17:10:17,811: INFO id: cd1f24aa3fb64f34b0f38172977d66c0, total: 1.533
2018-08-28 17:10:19,329: INFO id: 0bc7907f82d94804bd98dd1c5c19049c, total: 1.509
2018-08-28 17:10:19,761: INFO id: 6fd3f6b6f2bd4d929ba088eca1e07909, total: 3.209
2018-08-28 17:10:19,943: INFO id: 678641c3c0584801b042ca74daba7e3e, total: 3.589
2018-08-28 17:10:19,964: INFO id: 0fd25ee5d5b3469a83bc9ef6b1c4740d, total: 0.603
2018-08-28 17:10:20,037: INFO id: f4019147caf648158c44b5700bf34558, total: 3.596
2018-08-28 17:10:20,574: INFO id: 79342b19ac6346669f78deee0404f5c1, total: 0.790
2018-08-28 17:10:20,668: INFO id: aef87d19cd4049b2a08ba09e7aaa0d6b, total: 0.660
2018-08-28 17:10:20,711: INFO id: 03ba346c27e8458bbe8a674fa9688e4e, total: 0.747
2018-08-28 17:10:20,804: INFO id: e16ad58c734f48baaf6061bdcdc60d19, total: 0.720
2018-08-28 17:10:21,293: INFO id: 3381c75f19b048c59fb792fe1c8477a6, total: 0.702
2018-08-28 17:10:21,374: INFO id: 6143066549af418bae03219fecb8d6ed, total: 0.694
2018-08-28 17:10:21,509: INFO id: 44c964366b14498caefcee242084e37d, total: 0.780
2018-08-28 17:10:21,604: INFO id: 82106780e343426b987de889a982b6e8, total: 0.769
2018-08-28 17:10:22,044: INFO id: 446e28b2583b4acfb0dcc9d442d80694, total: 0.730
2018-08-28 17:10:22,061: INFO id: f1cb4fd140534380ac4a7d7f8dbfb955, total: 0.674
2018-08-28 17:10:22,120: INFO id: 02f1766b1efa467f99eccb8ddecb4d0d, total: 0.583
2018-08-28 17:10:22,211: INFO id: 5f9ca7c40e5f4abbbbb857f578206234, total: 0.584
2018-08-28 17:10:22,821: INFO id: 859a069e3b364f418fc00db62a9774c2, total: 0.757
2018-08-28 17:10:22,872: INFO id: 0d6ddc0e151c40c0a06c40621a108314, total: 0.582
2018-08-28 17:10:22,900: INFO id: ce03db18ce564a1093d119a514493c3f, total: 0.754
2018-08-28 17:10:23,005: INFO id: be9cd141a5244488b8b918acc466b413, total: 0.916
2018-08-28 17:10:23,299: INFO id: 29cda3659cda4d52b3dc2dadfc5e116d, total: 0.418
2018-08-28 17:10:23,346: INFO id: b1885d2585da4a75b31b32fc5412803b, total: 0.513

Troubleshooting & Debugging

Fuglu doesn’t even start

  • run fuglu --lint as root. are there any errors?
  • did you create /etc/fuglu/logging.conf (by renaming the logging.conf.dist file) ?
  • check if the log directory (/var/log/fuglu/ by default) exists an is writable by the user running fuglu
  • check for errors in /var/log/fuglu.log
  • run fuglu fuglu in foreground using fuglu --foreground or by setting daemonize=0 in fuglu.conf and check for errors

Debug Trace a single message

Fuglu runs but you want to know what exactly would happen to a single email message?

Make sure message debugging is enabled (it is by default, but if you screwed up your config…) :

  • prependers= should start with debug to make sure the debugger plugin is loaded
  • incomingport option should contain port 10888 (eg. incomingport=10025,10099,10888 ) , so fuglu listens on the debugging port
  • in the [debug] section, set debugport=10888 and debugfile=/tmp/fuglu_debug.log , so the debugger plugin knows what port to treat as debug port and where to store debug information
  • nobounce should be set to True, so debugged messages can not be bounced
  • noreinject shoud be set to True, so debugged messages are not re-injected to postfix for further processing
  • noappender should be set to True, so appenders are not run for debugged messages

Save the message on the server (rfc822 format), and run

fuglu_debug /path/to/message.eml

you may add envelope sender and recipient if these are relevant for your test, eg:

fuglu_debug /path/to/message.eml sender@example.org recipient@example.net

then check /tmp/fuglu_debug.log

Debug a suspect filter

So you have this filter in a plugin with hundreds of rules and you just don’t know which one matched a specific message?

fuglu_suspectfilter to the rescue! just pass a rule file and a message eml file as arguments and it will list all matches.

fuglu_suspectfilter /etc/fuglu/myfilterfile.regex /tmp/testmessage.eml
INFO:fuglu.suspectfilter:Reloading Rulefile /etc/fuglu/myfilterfile.regex
INFO:root:194 valid rules found
INFO:root:1 matches found

Match #1:
Matched header/field: From
Matched value in message: "Edgar" <edgarmail@example.com>
Regex : edgarmail@example\.com
Rule argument : Messages from Edgar

Add a -D argument for a full debug trace of the suspect filter.

Debug the fuglu core

If you are a python developer and would like to inspect fuglu at run-time, add the argument --console when starting fuglu. You will then get an interactive python console where all plugins etc are available from the ‘mc’ (MainController) object.

Starting with fuglu 0.6.1 it is also possible to start a network-enabled python shell using the command fuglu_control netconsole [<port> [<bindaddress>]]

Example: on the host running fuglu:

# fuglu_control netconsole 9999
Python interactive console starting on port 9999

on your host:

$ nc 9999
Fuglu Python Shell - MainController available as 'mc'

Runtime control

It is possible to change some core parameters at runtime and tell fuglu to reload the configuration. Sending SIGHUP to the main process will check for changes in the configuration and reload fuglu as needed to apply the changes: - Changes in configuration files (fuglu.conf or plugin configuration files) will restart the threads/process pool. - Changes in logging.conf will restart the logging configuration

What can be changed at runtime

  • plugins loaded and plugin configuration
  • threading mode : number of threads
  • process mode: number of processes
  • logging configuration, for example
  • log-level
  • handlers
  • loggers
  • backend process/thread

Please note it is recommended to change backend (process/thread) while the load is low. Changing the backend or the number of processes (initialprocs in process mode) will create a new processor pool. Changing the number of processes this creates a new pool which will take over for new messages. The old pool exist until all the tasks (messages) are processed. Therefore, the number of processes is the sum of the old processes plus the new processes until the old pool is closed.

The command to reload Fuglu is

$ systemctl reload fuglu

Note you have to put the current “fuglu.service” file in the system and run

$ systemctl daemon-reload

before you can use the reload option for fuglu. Previous versions of fuglu.service did not support reload.