LogAnalyzer Setup

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Note: this document has been used with the following loganalyzer versions: 3.0.2 (and a few before 3.0.2), 4.1.5


Rsyslog - any version that supports/includes the mySQL module or has the rsyslog-mysql rpm available
MySQL/MariaDB - See MySQL/MariaDB Setup to make sure you have MySQL or MariaDB set up/running
Apache - any version, but please use something recent, or the version included with a distro that is still receiving updates
PHP - most versions, but please use something recent, or the version included with a distro that is still receiving updates

Software Setup

1. Install rsyslog and PHP mySQL modules

# yum install rsyslog-mysql php-mysql

2. Get the latest loganalyzer package (http://loganalyzer.adiscon.com/) and copy to /tmp

3. Uncompress and move to standard RedHat/CentOS compatible 3rd party software location (/usr/share)
NOTE: 4.1.5 is probably not the version being installed, please use the version number being installed in place of 4.1.5

# mkdir /tmp/work-syslog ; cd /tmp/work-syslog/
# tar xzvf /tmp/loganalyzer-4.1.5.tar.gz
# mkdir /usr/share/loganalyzer-4.1.5 /usr/share/doc/loganalyzer-4.1.5
# mv loganalyzer-4.1.5/* /usr/share/doc/loganalyzer-4.1.5/
# mv /usr/share/doc/loganalyzer-4.1.5/src/* /usr/share/loganalyzer-4.1.5/
# mv /usr/share/doc/loganalyzer-4.1.5/doc/* /usr/share/doc/loganalyzer-4.1.5/
# rm -rf /usr/share/doc/loganalyzer-4.1.5/doc /usr/share/doc/loganalyzer-4.1.5/src /usr/share/loganalyzer-4.1.5/doc
# ln -s /usr/share/loganalyzer-4.1.5 /usr/share/loganalyzer
# touch /usr/share/loganalyzer-4.1.5/config.php
# chown apache.apache /usr/share/loganalyzer-4.1.5/config.php

Rsyslog Server Setup

1. set up user and grant proper perms;

# mysql -p mysql
mysql> grant insert on Syslog.* to 'syslog-insert'@'localhost' identified by 'somepwA';
mysql> flush privileges;

2. Update /etc/rsyslog.conf
Make sure the following is added
Add the following line to end of ModLoad/MODULES section

# enable mySql plugin/module
$ModLoad ommysql

Add the following line to the beginning of the logging/RULES section (before #kern.* line)

# log all to mySql
*.*       :ommysql:,Syslog,syslog-insert,somepwA

3. Create database/tables

# mysql -p </usr/share/doc/rsyslog-mysql-*/createDB.sql

4. Restart rsyslog service

# service rsyslog restart

Apache Setup

NOTE: this assumes this is on the company image, which creates most of the needed dirs/files/configs)
1. setup doc root
NOTE: syslog1 is the short hostname (hostname -s) of the system you are installing on

# cd /home/httpd/syslog1/
# rm -rf public_html
# ln -s /usr/share/loganalyzer-3.0.2 public_html

2. setup vhost file
add the following to /etc/httpd/conf/vhost-ssl.d/0-syslog1 (hostname -s) after ServerAdmin and before proxy section
Note: enabling the use of a symlink is done for the dir in which the symlink resides

<Directory /home/httpd/syslog1>
   Options FollowSymLinks

3. enable php

# cp -p /etc/httpd/conf.d/php.conf /etc/httpd/conf.d-run/

4. start up or restart apache (and make sure it starts on boot)

# systemctl start httpd
# systemctl enable httpd
# service httpd restart
# chkconfig httpd on

Web Interface Setup

1. setup user and permissions

# mysql -p
mysql> grant select, update, insert, create, drop, alter on Syslog.* to 'syslog-read'@'localhost' identified by 'somepwB';
mysql> flush privileges;

2. web interface configuration
2a. go to the new URL (configured in; Web Interface setup, step 3a) in a browser, you will get the following message;

Error, main configuration file is missing!

2b. click 'here' on the following message;

Click here to Install Adiscon LogAnalyzer!

2c. click 'next' on the following page;

Step 1 - Prerequisites

2d. click 'next' on the following page;

Step 2 - Verify File Permissions

2e. click 'next' on the following page;

Step 3 - Basic Configuration

2f. Fill in the following and click 'next';

Source Type: MYSQL Native
Database Name: Syslog
Database Tablename: SystemEvents
Database User: syslog-read
Database Password: somepwB

2g. Click 'here' on the following message;

Step 8 - Done
Click here to go to your installation.

Web Interface Fix

There was an issue (in older vers), that appeared more than once (possibly due to apache or php settings), where a config was populated but was not usable due to missing values. The following needed to be set in this situation to configure these settings for their default values
1. fix config.php
1a. edit config.php

# vi /usr/share/loganalyzer-3.0.2/config.php

1b. set ViewMessageCharacterLimit

$CFG['ViewMessageCharacterLimit'] = 80;

1c. set ViewStringCharacterLimit

$CFG['ViewStringCharacterLimit'] = 30;

1d. set ViewEntriesPerPage

$CFG['ViewEntriesPerPage'] = 50;

1e. set ViewEnableDetailPopups

$CFG['ViewEnableDetailPopups'] = 1;

1f. set EnableIPAddressResolve

$CFG['EnableIPAddressResolve'] = 1;

Purging mySQL database

This rsyslog configuration writes everything to a mySql database, as well as to the standard log files. The OS has the logrotate process to manage the log files, but if you wish to manage or periodically purge the mySql data, you can set up the following cron job (thanks to Michael Meckelein for posting this in a forum):
NOTE: you may want to setup another user which has delete permissions (like syslog-purge) to do the periodic cleanup for this cron process

mysql -u syslog-purge -p somepwA -e “delete from SystemEvents where ReceivedAt < date_add(current_date, interval -28 day)” Syslog

Recreating mySQL database

If you have to recreate mySQL data from scratch (due to corruption, or other issues)
1. make sure mysql is down

# systemctl stop mariadb
# service mysqld stop

2. wipe out all the data (make sure this is what you want to do, otherwise if you are wiping it out due to running out of diskspace or database corruption, google how to repair mysql/mariadb innodb databases)

# rm -rf /var/lib/mysql/* /var/lib/mysql/.my*

3. restart mysql

# systemctl start mariadb
# service mysqld start

4. purge unneeded users (link)

5. rebuild mysql & loganalyzer tables
Rerun the following steps from above

Rsyslog Server Setup; step 1
Server mySQL Setup; steps 2-4
Web Interface Setup; step 1

Client Rsyslog Setup

configure clients to connect to this central syslog server Rsyslog Client