Setup MyLVS

Get and install myLVS

• Download myLVS

wget http://mylvs.com/download/mylvs2.2.tar.gz

Note that the target paths are used with Debian, there might be different targets for other Linux distribution

• Unextract myLVS

tar -C / -xvf mylvs2.2.tar.gz

• This will create files in:
  • /etc/apache2/sites-enabled/
  • /etc/apache2/mylvs/
  • /etc/systemd/system
  • /var/www/mylvs

Permissions

Please set www-data as owner with execute permissions:

root@mylvs01:# chown www-data /var/www/mylvs -R

List root of www:

root@mylvs01:/var/www/mylvs# ls -all
total 124
drwxr-xr-x 6 www-data root  4096 Aug 22 14:14 .
drwxr-xr-x 4 root     root  4096 Jun 12 14:48 ..
drwxr-xr-x 2 www-data root  4096 Aug 22 15:27 backup
-rw-r--r-- 1 www-data root   229 Feb  9  2015 LEGAL
-rwxr-xr-x 1 www-data root  3828 Aug 18 13:25 mylvsinit.pl
-rwxr-xr-x 1 www-data root 92370 Aug 18 13:30 mylvsmon.pl
drwxr-xr-x 2 www-data root  4096 Aug 22 14:59 scripts
drwxr-xr-x 4 www-data root  4096 Feb  9  2015 ws
drwxr-xr-x 4 www-data root  4096 Aug 22 14:10 wwwroot

Setup mySQL

At the very step is to setup the database with all the required tables, please use the following import script mylvs.sql to do so.
You will find the script within the archive or on your disk in: /var/www/mylvs/templates/mysql_data/mylvs.sql

mysql -u root -p < /var/www/mylvs/templates/mysql_data/mylvs.sql

You may also see: Create the Database and the Users

Setup Apache

Copy the configuration to your Apache Webserver if not already done:

cp /var/www/mylvs/templates/etc/apache2/sites-available/mylvs.conf /etc/apache2/sites-available/

Optional copy the Webservice configuration to your Apache Webserver:

cp /var/www/mylvs/templates/etc/apache2/sites-available/ws.mylvs.foo.conf /etc/apache2/sites-available/

Verify the myLVS Web configuration and enable it with a2ensite:

a2ensite mylvs.conf

Optional verify the myLVS Monitor configuration and enable it with a2ensite:

a2ensite ws.mylvs.foo.conf

Restart Apache

service apache2 restart

Add a demo account to apache, this will be the login through the browser, note that this step is required:

root@mylvs01:/# htpasswd -c /var/www/mylvs/wwwroot/.htpasswd.users demo

myLVS configuration

myLVS is using a XML configuration in /etc/myslvs/mylvs.conf.xml

• SQL related settings

Element	Attribute	Description
SQLServer	Address	SQL Server address
SQLServer	Database	Database name
SQLServer	User	Username
SQLServer	Password	Plain password
SQLServerBackup	Address	SQL Backup Server address, only used within an HA environment.
SQLServerBackup	Database	(HA) Backup Database name
SQLServerBackup	User	(HA) Backup Username
SQLServerBackup	Password	(HA) Backup Plain password
SQLServerBackup	ReplCommand	Command to be used when changes occur
SQLConfigBackup	Path	Path to the helper scripts
SQLConfigBackup	ResoreApp	Name of the script to restore the sql data
SQLConfigBackup	BackupApp	Name of the script to backup the sql data

• LVS

Element	Attribute	Description
LVS	Command	Command path and name of ipvsadm
Operator	Mailserver	Mailsever name or IP address
Operator	Mailfrom	Mailfrom name
Operator	MailTo	Mailto name
Operator	MailCC	MailCC
Operator	MailBCC	MailBCC
Maintenance	FileAge	Amount of days for log data retention
Maintenance	SQLAge	Amount of days for sql log data retention

• HTTP Related Settings

Element	Attribute	Description
ShowAmount	ActiveWarning	Amount of connections before a warning will be displayed
ShowAmount	InActiveWarning	Amount of connections before a warning will be displayed
ShowAmount	HTTP_ERR	N.A.
ShowAmount	HTTP_WARN	N.A.
ShowAmount	MaxConCount	N.A.
Operation	WebSimulate	Set 1 to simulate myLVS actions
Operation	MonSimulate	Set 1 to simulate myLVS Monitor actions
Information	host	path and name to the host command
Information	nmap	path and name to the nmap command
Modules	Path	Path to the shared modules
StatusView	SupressedAddress	List of IP addresses which will not be shown within the myLVS connection display
View	HTMLLVSOutput	N.A.
Log	Name	Name of the myLVS logfile
Log	Path	Path to the myLVS log
Log	gzip	Path and name for the gzip command
Log	Days	N.A.
Logo	Path	Path and name for the log for myLVS

Sample configuration

root@mylvs01:/# cat /etc/mylvs/mylvs.conf.xml
<?xml version="1.0"?>
<CONFIG>
  <SQLServer Address="127.0.0.1" Database="mylvs" User="mylvsuser" Password="demo" />
  <SQLServerBackup Enabled="0" Address="" Database="" User="" Password="" ReplCommand="no-sample-available-yet" />
  <SQLConfigBackup Path="/var/www/mylvs/backup/" RestoreApp="/var/www/mylvs/scripts/mkrestore.sh" BackupApp="/var/www/mylvs/scripts/mkbackup.sh"/>
  <LVS Command="/usr/bin/sudo /sbin/ipvsadm"  />
  <Operator Mailserver="mail.mylvs.com" Mailfrom="lvsmon@mylvs.com" MailTo="postmaster@mylvs.com" MailCC="anybody@domain.com" MailBCC=""/>
  <Maintenance FileAge="5" SQLAge="5"/>
  <ShowAmount ActiveWarning="200" InActiveWarning="2000" HTTP_ERR="120" HTTP_WARN="80" MaxConCount="1000"/>
  <Operation WebSimulate="0" MonSimulate="0"/>
  <Information host="/usr/bin/sudo /usr/bin/host" nmap="/usr/bin/sudo /usr/bin/nmap -sS -O -v" />
  <Modules Path="/usr/local/lvs/wwwroot/modules/"/>
  <StatusView SupressedAddress=""/>
  <View HTMLLVSOutput="0"/>
  <Log Name="mylvslog.log" Path="/var/log/mylvs/" gzip="/bin/gzip" Days="24"/>
  <Logo Path="/images/Linux_Logo.gif" />
</CONFIG>

Login to myLVS

Depending on your client OS you may add a hostheader to your host file, to do this type

• Linux

# vi /etc/hosts

• Windows (Administrator command shell)

notepad c:\Windows\System32\drivers\etc\hosts

Add:

192.168.x.y	mylvs.foo

• Note: The Windows DNS Cache requires a reload:

ipconfig/flushdns

Navigate your prefered browser to mylvs.foo, login using demo, demo.
You should see a screen similar the this:

Note: To setup a fresh configuration you could easily setup the node and servers through the setup and begin then from scratch.

Automatic load of myLVS setting

To automatic load the myLVS Web configuration it is requires to setup sysmctl which comes new with Debian 8.
This configuration will start on boot only using the type oneshot, it is very important to load this after mysql.service startup command
Get the configuration from the templates and copy it to the systemd user directory if not already done:

cp /var/www/mylvs/templates/etc/systemd/system/mylvs-init.service /etc/systemd/system/

Alternative get the myLVS Monitor startup configuration from the templates and copy it to the systemd user directory

cp /var/www/mylvs/templates/etc/systemd/system/ mylvsmon.service /etc/systemd/system/

• Get the first status

root@mylvs01:/systemctl status mylvs-init.service
mylvs-init.service - myLVS Startup Script
 Loaded: loaded (/etc/systemd/system/mylvs-init.service; disabled)
 Active: inactive (dead)

• Enable the service:

root@mylvs01:/systemctl enable mylvs-init.service
Created symlink from /etc/systemd/system/multi-user.target.wants/mylvs-init.service to /etc/systemd/system/mylvs-init.service.

• Reload, this is needed wen changes are done

root@mylvs01:/systemctl daemon-reload

• Reboot to test if all service are starting as expected

• Live Status

root@mylvs01:/home/demo# systemctl status mylvs-init.service
mylvs-init.service - myLVS Startup Script
  Loaded: loaded (/etc/systemd/system/mylvs-init.service; enabled)
  Active: inactive (dead) since Mon 2015-08-17 14:53:48 EDT; 1min 38s ago
 Process: 933 ExecStart=/usr/bin/perl /var/www/mylvs/mylvsinit.pl -a (code=exited, status=0/SUCCESS)
Main PID: 933 (code=exited, status=0/SUCCESS)

Where to go next

• Go here: Setup windows test client