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Full Discussion: Nearly Random, Uncorrelated Server Load Average Spikes
Top Forums UNIX for Advanced & Expert Users Nearly Random, Uncorrelated Server Load Average Spikes Post 303044138 by Neo on Saturday 15th of February 2020 02:28:08 AM
Old 02-15-2020
Next:

I have some old "cyberspace situational awareness" PHP code I used for a visualization project a few years ago, which captures and stores details information on web session activity; this code has proven handy identifying rouge bots in the past.

So, I have modified that code to capture and store detailed session information, including the number of hits per IP address, the user agent string, country code, etc. when the 1 minute load average is above 20 and less than 50.

Code:
$theload = getLoadAvg();
if (floatval($theload) > 20.0 && floatval($theload) < 50.0) 
{
  /// the old CSA code to parse web session activity and store the results in the DB
}

So, let's see what happens the next time we get a spike... this should be interesting.


Code:
mysql> describe neo_csa_session_manager;
+--------------+------------------+------+-----+---------+----------------+
| Field        | Type             | Null | Key | Default | Extra          |
+--------------+------------------+------+-----+---------+----------------+
| id           | int(11) unsigned | NO   | PRI | NULL    | auto_increment |
| user_id      | int(11)          | NO   | MUL | 0       |                |
| session_id   | varchar(255)     | NO   |     | NULL    |                |
| url          | text             | NO   |     | NULL    |                |
| ip_address   | varchar(45)      | NO   | MUL | NULL    |                |
| user_agent   | varchar(255)     | NO   |     | NULL    |                |
| bot_flag     | tinyint(1)       | NO   |     | 0       |                |
| robot_txt    | mediumint(6)     | NO   |     | 0       |                |
| sitemap      | mediumint(6)     | NO   |     | 0       |                |
| riskscore    | int(11)          | NO   |     | 0       |                |
| country_iso2 | varchar(2)       | NO   |     | UN      |                |
| country      | varchar(50)      | NO   |     | UNKNOWN |                |
| hitcount     | int(10) unsigned | NO   |     | 1       |                |
| firstseen    | bigint(11)       | NO   |     | NULL    |                |
| unixtime     | bigint(11)       | YES  |     | NULL    |                |
| longitude    | float            | NO   |     | 0       |                |
| latitude     | float            | NO   |     | 0       |                |
+--------------+------------------+------+-----+---------+----------------+
17 rows in set (0.00 sec)

This User Gave Thanks to Neo For This Post:
vbe
 

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LEARN ABOUT DEBIAN

mysqmail-courier-logger

mysqmail-logger(8)					      System Manager's Manual						mysqmail-logger(8)

NAME

       mysqmail-courier-logger - logs courier-imap traffic to a mysql database

SYNOPSIS

       mysqmail-courier-logger subprogram [ args ...  ]

DESCRIPTION

       mysqmail-courier-logger reads the syslog using tail -F, and for each dovecot lines of POP3 and IMAP corresponding to a disconnection, mysq-
       mail-courier-logger writes the total used bandwidth corresponding to the username. Configuration is read from /etc/mysqmail.conf.

       mysqmail-courier-logger uses a table corresponding to this one:

       CREATE TABLE IF NOT EXISTS pop_access (
	 id varchar(32) NOT NULL default '',
	 uid int(11) NOT NULL default '65534',
	 gid int(11) NOT NULL default '65534',
	 home varchar(255) NOT NULL default '',
	 shell varchar(255) NOT NULL default '',
	 mbox_host varchar(120) NOT NULL default '',
	 crypt varchar(50) NOT NULL default '',
	 passwd varchar(50) NOT NULL default '',
	 active int(11) NOT NULL default '1',
	 start_date date NOT NULL default '0000-00-00',
	 expire_date date NOT NULL default '0000-00-00',
	 quota_size int(11) NOT NULL default '0',
	 type varchar(20) NOT NULL default 'default',
	 memo text,du bigint(20) NOT NULL default '0',
	 another_perso varchar(5) NOT NULL default 'no',
	 redirect1 varchar(255) default NULL,
	 redirect2 varchar(255) default NULL,
	 localdeliver varchar(10) NOT NULL default 'yes',
	 pop3_login_count int(9) NOT NULL default '0',
	 pop3_transfered_bytes int(14) NOT NULL default '0',
	 imap_login_count int(9) NOT NULL default '0',
	 imap_transfered_bytes int(14) NOT NULL default '0',
	 last_login int(14) NOT NULL default '0',
	 PRIMARY KEY  (id,mbox_host) ) TYPE=MyISAM

       To have mysqmail-courier-logger working, you should have issued	mkfifo	/var/log/courier.fifo  to  create  the	fifo  and  use	nohup  cat
       /var/log/courier.fifo | /usr/bin/mysqmail-courier-logger > /dev/null 2>&1 & to launch it.

VERSION

       This documentation describes mysqmail-courier-logger version 0.1.4.  See http://gplhost.com/softwares-mysqmail.html for updates.

SEE ALSO

       qmail-send(3), syslog(3), logger(8)

																mysqmail-logger(8)
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