Logstalgia(1)Logstalgia(1)NAME
Logstalgia - a web server access log visualization tool
SYNOPSISlogstalgia [-f] [-WIDTHxHEIGHT] [options] logfile
DESCRIPTIONlogstalgia is a visualization tool that replays or streams web server
access logs as a retro arcade game simulation.
REQUIREMENTS
logstalgia's display is rendered using OpenGL and requires a 3D accel‐
erated video card to run.
Logstalgia supports several standardized access.log formats used by web
servers such as Apache and Nginx (see 'SUPPORTED LOG FORMATS' below).
As logstalgia is designed to playback logs in real time you will need a
log from a fairly busy webserver to achieve interesting results (eg
100s of requests each minute).
OPTIONS-f Fullscreen.
-WIDTHxHEIGHT
Set the window size. If -f is also supplied, will attempt to set
the video mode to this also.
-b, --background
Background colour in hex.
-x--full-hostnames
Show full request ip/hostname.
-s, --speed
Simulation speed. Defaults to 1 (1 second-per-second).
-u, --update-rate
Page Summary update speed. Defaults to 5 (5 seconds).
-g name,regex,percent[,colour]
Urls matching the given regex will appear under a new section
with the given name using the given percentage of the screen.
Colour may optionally be supplied in the common hexadecimal for‐
mat (eg FF0000 for red)
If no groups are supplied the default groups are Images (image
files), CSS (.css files) and Scripts (.js files).
If there is enough space remaining a catch-all group of Misc
will appear as the last group.
--paddle-mode MODE
Paddle mode (pid, vhost, single).
vhost - separate paddle for each virtual host in the log file.
pid - separate paddle for each process id in the log file.
single - single paddle (the default).
--paddle-position POSITION
Paddle position as a fraction of the view width (0.25 - 0.75).
--sync Read from STDIN, ignoring entries before the current time.
--start-position POSITION
Begin at some position in the log file (between 0.0 and 1.0).
--stop-position POSITION
Stop at some position.
--no-bounce
No bouncing.
--hide-response-code
Hide response code.
--hide-paddle
Hide paddle.
--hide-url-prefix
Hide URL protocol and hostname prefix of requests.
--disable-auto-skip
Disable automatic skipping of empty time periods.
--disable-progress
Disable the progress bar.
--disable-glow
Disable the glow effect.
--font-size SIZE
Font size.
--glow-duration
Duration of the glow (between 0.0 and 1.0).
--glow-multiplier
Adjust the amount of glow.
--glow-intensity
Intensity of the glow.
--output-ppm-stream FILE
Write frames as PPM to a file ('-' for STDOUT).
--output-framerate FPS
Framerate of output (used with --output-ppm-stream).
logfile
The path to the access log file to read or '-' if you wish to
supply log entries via STDIN.
EXAMPLES
Watch an example access.log using the default settings:
logstalgia /usr/local/share/logstalgia/example.log
Watch the live access.log, starting from the most recent batch of
entries in the log (requires tail). Note than '-' at the end is
required for logstalgia to know it needs to read from STDIN:
tail -f /var/log/apache2/access.log | logstalgia-
To follow the log in real time, use the --sync option. This will start
reading from the next entry received on STDIN:
tail -f /var/log/apache2/access.log | logstalgia--sync
Watch a remote access.log via ssh:
ssh user@example.com tail -f /var/log/apache2/access.log | logstal‐
gia --sync
SUPPORTED LOG FORMATS
Logstalgia supports the following standardized log formats used by web
servers like Apache and Nginx:
NCSA Common Log Format (CLF)
"%h %l %u %t \"%r\" %>s %b"
NCSA Common Log Format with Virtual Host
"%v %h %l %u %t \"%r\" %>s %b"
NCSA extended/combined log format
"%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-agent}i\""
NCSA extended/combined log format with Virtual Host
"%v %h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-
agent}i\""
The process id (%P), or some other identifier, may be included as an
additional field at the end of the entry. This can be used with '--pad‐
dle-mode pid' where a separate paddle will be created for each unique
value in this field.
CUSTOM LOG FORMAT
Logstalgia now supports a pipe ('|') delimited custom log file format:
timestamp - unix timestamp of the request date.
hostname - hostname of the request
path - path requested
response_code - the response code from the webserver (eg 200)
response_size - the size of the response in bytes
The following are optional:
success - 1 or 0 to indicate if successful
response_colour - response colour in hexidecial (#FFFFFF) format
referrer url - the referrer url
user agent - the user agent
virtual host - the virtual host (to use with --paddle-mode vhost)
pid - process id or some other identifier (--paddle-mode
pid)
If success or response_colour are not provided, they will be derived
from the response_code using the normal HTTP conventions (code < 400 =
success).
RECORDING VIDEOS
See the guide on the homepage for examples of recording videos with
Logstalgia:
http://code.google.com/p/logstalgia/wiki/Videos
INTERFACE
The time shown in the top left of the screen is set initially from the
first log entry read and is incremented according to the simulation
speed (-s).
The counter in the bottom right hand corner shows the number of
requests displayed since the start of the current session.
Pressing space at any time will pause/unpause the simulation. While
paused you may use the mouse to inspect the detail of individual
requests.
Interactive keyboard commands:
(q) Debug Information
(c) Displays Logstalgia logo
(n) Jump forward in time to next log entry.
(+-) Adjust simulation speed.
(<>) Adjust time scale.
(ESC) Quit
AUTHOR
Written by Andrew Caudwell
Project Homepage: http://code.google.com/p/logstalgia/
COPYRIGHT
Copyright (C) 2008 Andrew Caudwell (acaudwell@gmail.com)
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version
3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
ACKNOWLEDGEMENTS
Catalyst IT (catalyst.net.nz)
For supporting the development and promotion of Logstalgia!
Logstalgia(1)
