Logstalgia(1)

NAME
Logstalgia - a web server access log visualization tool

SYNOPSIS
logstalgia [options] logfile

DESCRIPTION
logstalgia 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 accelerated 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. Add ! to make the window non-resizable.

--screen SCREEN
    Set the number of the screen to display on.

--window-position XxY
    Initial window position on your desktop which may be made up of multiple monitors.

    This will override the screen setting so don't specify both.

--frameless
    Frameless window.

--title TITLE
    Set a title.

-b, --background
    Background colour in hex.

-x  --full-hostnames
    Show full request ip/hostname.

-s, --simulation-speed
    Simulation speed. Defaults to 1 (1 second-per-second).

-p, --pitch-speed
    Speed balls travel across the screen (defaults to 0.15).

-u, --update-rate
    Page Summary update speed. Defaults to 5 (5 seconds).

-g name,(HOST|URI|CODE)=regex[,SEP=chars][,MAX=n][,ABBR=n],percent[,colour]
    Creates a new named summarizer group for requests for which a specified attribute (HOST, URI or response CODE) matches a regular expression. Percent specifies a vertical percentage of screen to use.

    SEP=chars can specify a list of separator characters (e.g. /) to split on. The default separator is /.

    MAX=n specifies the max depth into the path to be displayed. (e.g. MAX=1 would show only root directory names of paths). By default there is 0 (no limit).

    ABBR=n specifies the minimum depth at which to allow partially abbreviated strings. The default is 0 (allow). -1 to disallow.

    A colour may optionally be supplied in hexadecimal format (eg FF0000 for red) which will be applied to all labels and request balls matched to the group.

    Examples:

     -g "HTML,URI=html?$,30"
     -g "Lan,HOST=^192,30"
     -g "Success,CODE=^[23],30"

    If no groups are specified, the default groups are Images (image files), CSS (.css files) and Scripts (.js files).

    If there is enough space remaining a catch-all group 'Misc' will appear as the last group.

--address-separators CHARS
    List of address separator characters. Defaults to '.:'.

--address-max-depth DEPTH
    Maximum depth to display in address summarizer. 0 for no maximum.

--address-abbr-depth DEPTH
    Minimum abbreviation depth of address summarizer. 0 to always allow abbreviations, -1 to never abbreviate.

--path-separators CHARS
    Default list of path separator characters. Defaults to /.

--path-max-depth DEPTH
    Default maximum path depth shown in the summarizer. 0 for no maximum.

--path-abbr-depth DEPTH
    Default minimum path abbreviation depth. 0 to always allow abbreviations, -1 to never abbreviate.

--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).

--display-fields REQUEST_FIELDS
    List of one or more request fields that are shown when the user hovers the mouse over an individual request:

        path - the path of the resource requested
        hostname - hostname or IP address
        response_size - size of the response in bytes
        response_code - response code
        method - method
        protocol - protocol
        timestamp - timestamp of request
        referrer - referrer URL of the request
        user_agent - user agent
        vhost - virtual host name
        log_entry - full log entry
        pid - the pid of the instance that handled the request

    Separate multiple fields with commas (eg 'path,hostname')

--sync
    Read from STDIN, ignoring entries before the current time.

--from, --to 'YYYY-MM-DD hh:mm:ss +tz'
    Show entries from a specific time period.

    If a time zone offset isn't specified the local time zone is used.

    Example accepted formats:

        "2012-06-30"
        "2012-06-30 12:00"
        "2012-06-30 12:00:00 +12"

--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-paddle-tokens
    Hide paddle tokens shown in multi-paddle modes.

--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.

-o, --output-ppm-stream FILE
    Write frames as PPM to a file ('-' for STDOUT).

-r, --output-framerate FPS
    Framerate of output (used with --output-ppm-stream).

--load-config CONFIG_FILE
    Load a config file.

--save-config CONFIG_FILE
    Save a config file with the current options.

--detect-changes
    Automatically reload config file when it is modified.

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/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 | logstalgia --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 '--paddle-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:

https://github.com/acaudwell/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.

You can click on summarizer group entries on the left and right side of the screen to filter to requests matching that entry. Click on the filter description to remove the filter.

Interactive keyboard commands:

(q) Debug Information
(c) Displays Logstalgia logo
(n) Jump forward in time to next log entry.
(+-) Adjust simulation speed.
(<>) Adjust pitch speed.
(F5) Reload config
(F11) Window frame toggle
(F12) Screenshot
(Alt+Enter) Fullscreen toggle
(Ctrl+S) Save config
(Home/End) Adjust address summarizer maximum depth
(Page Up/Down) Adjust group summarizer maximum depth
(Ctrl+Home/End) Adjust address summarizer abbreviation depth
(Ctrl+Page Up/Down) Adjust group summarizer abbreviation depth
(ESC) Quit

AUTHOR
 Written by Andrew Caudwell

 Project Homepage: http://logstalgia.io

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!