VMware Monitoring

Skip Prerequisites, Web and LPAR2RRD tabs in case of configuring Virtual Appliance, Docker or a Container

Prerequisites
Web
LPAR2RRD
VMware
Linux OS agent

LPAR2RRD can be hosted on any Unix or Linux Operating system
Perl: arbitrary version coming with the OS with some additional modules, more below
Apache or any other Web server

Skip it in case of configuring Virtual Appliance
HW sizing

User creation

create lpar2rrd user under root:

# useradd -c "LPAR2RRD user" -m lpar2rrd
# chmod 755 /home/lpar2rrd

Increase limits for user lpar2rrd and the WEB server user (under root)

AIX

# chdev -l sys0 -a maxuproc=2000
# chuser  nofiles=32768 data=-1  stack=-1 rss=-1 lpar2rrd
# chuser  data=-1  stack=-1 rss=-1 apache

Linux

# vi /etc/security/limits.conf

lpar2rrd        hard    stack           -1
lpar2rrd        soft    stack           -1
lpar2rrd        hard    data            -1
lpar2rrd        soft    data            -1
lpar2rrd        hard    nofile          32768 
lpar2rrd        soft    nofile          32768 
lpar2rrd        hard    nproc           5000
lpar2rrd        soft    nproc           5000

apache          hard    stack           -1
apache          soft    stack           -1
apache          hard    data            -1
apache          soft    data            -1

If you have already running STOR2RRD on the same host then skip to Web tab.

Linux RedHat, CentOS

RHEL 8: enable the codeready-builder-for-rhel-8-*-rpms repository

# ARCH=$( /bin/arch )
# subscription-manager repos --enable "codeready-builder-for-rhel-8-${ARCH}-rpms"

CentOS 8: enable the PowerTools repository
```
# yum config-manager --set-enabled PowerTools
or
# dnf config-manager --set-enabled powertools
```
You can also just open /etc/yum.repos.d/CentOS-Linux-PowerTools.repo with a text editor and set enabled= to 1 instead of 0

RHEL 9: enable config-manager and the PowerTools repository

dnf install 'dnf-command(config-manager)'
dnf config-manager --enable crb

RedHat, CentOS: all versions

# yum install perl rrdtool rrdtool-perl httpd mod_ssl
# yum install epel-release
# yum install perl-TimeDate perl-HTTP-Date perl-Env perl-CGI perl-Data-Dumper perl-LWP-Protocol-https perl-libwww-perl perl-Time-HiRes perl-IO-Tty
# yum install perl-PDF-API2 perl-JSON-XS perl-XML-Simple perl-XML-NamespaceSupport perl-URI perl-XML-SAX-Base perl-XML-SAX perl-XML-LibXML
# yum install ed bc libxml2 sharutils

Follow this for installing perl-PDF-API2 on RHEL/CentOS 8
Note that rrdtool-perl and epel-release (this is necessary only for PDF reporting) might not be in your RedHat base repository especially for RHEL 6.x and olders.
Install CentOS package instead rrdtool-perl-1.4.8-9.el7.x86_64.rpm and epel-release-7-11.noarch.rpm

Linux Debian, Ubuntu

# umask 0022
# apt-get install apache2 perl rrdtool ed bc
# apt-get install librrdp-perl libxml-sax-perl libxml-simple-perl libtimedate-perl libenv-sanctify-perl libcgi-pm-perl libdata-dumper-simple-perl libpdf-api2-perl libxml2-utils
# apt-get install liblwp-protocol-https-perl=6.04-2 libcrypt-ssleay-perl libio-socket-ssl-perl libmozilla-ldap-perl libxml-parser-perl libjson-xs-perl

liblwp-protocol-https-perl 6.04-2

# apt-mark hold liblwp-protocol-https-perl
  liblwp-protocol-https-perl set on hold.

SuSE

# zypper install rrdtool perl-rrdtool apache2
# zypper install perl-TimeDate perl-XML-Simple perl-XML-SAX perl-XML-LibXML perl-CGI perl-LWP-Protocol-https perl-libwww-perl perl-IO-Tty
# zypper install perl-PDF-API2 perl-JSON-XS
# zypper install ed bc libxml2-2 sharutils

AIX

AIX yum installation

RRDTool 1.4.8

Solaris

# /opt/csw/bin/pkgutil -y -i pm_xml_simple pm_libxml_perl pm_xml_sax rrdtool

Troubleshooting

Missing LWP::Protocol::https
Connection reset by peer
SSL negotiation failed
Server version unavailable at 'https...
SOAP request error - possibly a protocol issue ...

this docu

Skip it in case of configuring Virtual Appliance
Optional configuration of authorization in Apache. You can proceed it after Apache access works without authorization prompt as per below cfg.

Apache download

Linux CentOS, RedHat
```
# yum install httpd
```
Linux Debian, Ubuntu
```
# apt-get install httpd
```

Apache configuration

Linux CentOS, RedHat
Linux Debian, Ubuntu
SuSE
Apache 2.4+
Apache 1.3 - 2.3
SELinux disable
Apache authorization (optional)

Apache start / restart

# apachectl restart
# /opt/freeware/apache/sbin/apachectl restart
# /etc/init.d/httpd restart
# service apache2 restart

# firewall-cmd --add-service=http --permanent
# firewall-cmd --add-service=https --permanent
# firewall-cmd --add-port=8162/tcp --permanent

# firewall-cmd --reload

Test web pages

http://<your lpar2rrd host>/lpar2rrd/

Apache configuration per platform and version

Linux CentOS, RedHat

Append at the end of /etc/httpd/conf/httpd.conf following

# vi /etc/httpd/conf/httpd.conf

AddHandler cgi-script .sh
# DocumentRoot  "/home/lpar2rrd/lpar2rrd/www/"
Alias /lpar2rrd  "/home/lpar2rrd/lpar2rrd/www/"
<Directory "/home/lpar2rrd/lpar2rrd/www/">
    AllowOverride 
    Options Indexes FollowSymLinks
    Require all granted
</Directory>
# CGI-BIN
ScriptAlias /lpar2rrd-cgi/ "/home/lpar2rrd/lpar2rrd/lpar2rrd-cgi/"
<Directory "/home/lpar2rrd/lpar2rrd/lpar2rrd-cgi">
    AllowOverride 
    SetHandler cgi-script
    Options ExecCGI FollowSymLinks
    Require all granted
</Directory>

Linux Debian, Ubuntu : Apache2 (2.4+)

Enable CGI-BIN and optionally even SSL if it is required

# a2enmod cgi
# a2enmod ssl

Append this at the end of /etc/apache2/apache2.conf

# vi /etc/apache2/apache2.conf

AddHandler cgi-script .sh
Alias /lpar2rrd  "/home/lpar2rrd/lpar2rrd/www/"
<Directory "/home/lpar2rrd/lpar2rrd/www/">
    Options Indexes FollowSymLinks 
    Require all granted
</Directory>
# CGI-BIN
ScriptAlias /lpar2rrd-cgi/ "/home/lpar2rrd/lpar2rrd/lpar2rrd-cgi/"
<Directory "/home/lpar2rrd/lpar2rrd/lpar2rrd-cgi">
    AllowOverride None
    Options +ExecCGI +SymLinksIfOwnerMatch
    Require all granted
    SetHandler cgi-script
</Directory>

SuSE

Append at the end of /etc/apache2/httpd.conf following

# vi /etc/apache2/httpd.conf

AddHandler cgi-script .sh
Alias /lpar2rrd  "/home/lpar2rrd/lpar2rrd/www/"
<Directory "/home/lpar2rrd/lpar2rrd/www/">
    Options Indexes FollowSymLinks
    Require all granted
</Directory>
# CGI-BIN
ScriptAlias /lpar2rrd-cgi/ "/home/lpar2rrd/lpar2rrd/lpar2rrd-cgi/"
<Directory "/home/lpar2rrd/lpar2rrd/lpar2rrd-cgi">
    AllowOverride None
    Options +ExecCGI +SymLinksIfOwnerMatch
    Require all granted
    SetHandler cgi-script
</Directory>

Apache 2.4+ generally

Configure httpd.conf, it might be in different locations (depends of distribution)

/etc/httpd/httpd.conf
/etc/httpd/conf/httpd.conf
/etc/opt/freeware/apache/httpd.conf (AIX)
/opt/freeware/etc/httpd/httpd.conf (AIX)
/opt/freeware/etc/httpd/conf/httpd.conf (AIX)
/etc/apache2/apache2.conf

Verify alias_module and cgi_module is loaded (uncommented it, the path can be different)

LoadModule alias_module /opt/freeware/lib/httpd/modules/mod_alias.so
LoadModule cgi_module /opt/freeware/lib/httpd/modules/mod_cgi.so

cgi_module could depend on mpm_prefork_module like here.
Allow it as well (uncomment it) and disable mpm_worker_module, mpm_event_module

LoadModule mpm_prefork_module /opt/freeware/lib/httpd/modules/mod_mpm_prefork.so
# LoadModule mpm_worker_module /opt/freeware/lib/httpd/modules/mod_mpm_worker.so
# LoadModule mpm_event_module modules/mod_mpm_event.so
<IfModule mpm_prefork_module>
     LoadModule cgi_module /opt/freeware/lib/httpd/modules/mod_cgi.so
</IfModule>

Append this at the end of httpd.conf

AddHandler cgi-script .sh
Alias /lpar2rrd  "/home/lpar2rrd/lpar2rrd/www/"
<Directory "/home/lpar2rrd/lpar2rrd/www/">
    Options Indexes FollowSymLinks 
    Require all granted
</Directory>
# CGI-BIN
ScriptAlias /lpar2rrd-cgi/ "/home/lpar2rrd/lpar2rrd/lpar2rrd-cgi/"
<Directory "/home/lpar2rrd/lpar2rrd/lpar2rrd-cgi">
    AllowOverride None
    SetHandler cgi-script
    Options ExecCGI FollowSymLinks
    Require all granted
</Directory>

Sometimes appears necessary to remove "Require all granted" lines in both directives.

Apache 1.3 - 2.3

Configure httpd.conf, it might be in different locations (depends of distribution)

/etc/httpd/httpd.conf
/etc/httpd/conf/httpd.conf

# vi /etc/opt/freeware/apache/httpd.conf

Alias /lpar2rrd  "/home/lpar2rrd/lpar2rrd/www/"
<Directory "/home/lpar2rrd/lpar2rrd/www/">
    Options Indexes FollowSymLinks 
    Order allow,deny
    Allow from all
</Directory>
# CGI-BIN
ScriptAlias /lpar2rrd-cgi/ "/home/lpar2rrd/lpar2rrd/lpar2rrd-cgi/"
<Directory "/home/lpar2rrd/lpar2rrd/lpar2rrd-cgi">
    AllowOverride None
    Options ExecCGI FollowSymLinks
    Order allow,deny
    Allow from all
</Directory>

SELinux changes

You need to disable the SELinux service protection to be able to utilize basic web services.
You must do it in case you get "(13)Permission denied:" in Apache error_log.
You have 2 options:

Disable SELinux only for Apache

Step 1. Query for the Boolean value you need to change:
# getsebool -a | grep httpd_dis
  httpd_disable_trans --> off

Step 2. Disable the SELinux protection:
# setsebool -P httpd_disable_trans=1

Step 3. Verify that the Boolean has changed:
# getsebool -a | grep httpd_dis
  httpd_disable_trans --> on

Globally disable SELinux

# setenforce Permissive
# vi /etc/sysconfig/selinux
  SELINUX=disabled

Follow SELinux configuration in case you want to enable SELinux with our tools

Note: vCenter 8.x will be supported in LPAR2RRD 7.60 (Jan 2023).

Prerequisites

Create a user on each vCenter with read-only role.

Create an account, it must be the global one (like below lpar2rrd in xorux.com domain)

Assign lpar2rrd@xorux.com user read-only role
Download Linux VMware Perl SDK in tar.gz format from the VMware site.
It requires free registration at VMware.
Does not matter if you are on AIX or Linux, if 32bit or 64bit package, just a few Perl libraries is used from it
Use always the latest SDK 7.x
Download link: VMware vSphere Perl SDK 7.0U2
Allow access from the LPAR2RRD host to vCenter on port 443 TCP (https).
You can test it via command line like below or during connection test from the UI.
```
perl /home/lpar2rrd/lpar2rrd/bin/conntest.pl <vCenter-host> 443  
  Connection to <vCenter-host> on port "443" is ok
```

Installation of VMware SDK from the UI

Installation of VMware SDK manually

Install script, download VMware-vSphere-Perl-SDK-7.0.0-17698549.i386.tar.gz into /tmp

# su - lpar2rrd
cd /home/lpar2rrd/lpar2rrd
./bin/vmware_install.sh /tmp
  /tmp/VMware-vSphere-Perl-SDK-7.0.0-17698549.i386.tar.gz found
  Extracting selected package to /home/lpar2rrd/lpar2rrd/vmware-vsphere-cli-distrib ...
  Installing selected libraries and apps to /home/lpar2rrd/lpar2rrd/vmware-lib ...
  ...
  Continue by define VMware hosts and their credentials
  UI: menu ➡ VMware ➡ Configure ➡ Add credentials

Test of vCenter connection (the last cmd must print vCenter time):
Use double quotes around username and password only in this test

cd /home/lpar2rrd/lpar2rrd
. etc/lpar2rrd.cfg
$PERL vmware-lib/apps/connect.pl --version
  vSphere SDK for Perl version: 7.0.0
  Script 'connect.pl' version: 1.0
$PERL vmware-lib/apps/connect.pl --server <vCenter host> --username "lpar2rrd@your_domain" --password "XXXXX"
  Connection Successful
  Server Time : 2016-02-25T16:28:44.086369Z

If you get output like below then follow bellow Troubleshooting section

Server version unavailable at 'https://<vCenter host>:443/sdk/vimService.wsdl' at /home/lpar2rrd/lpar2rrd/vmware-lib/apps/../VMware/VICommon.pm line 704.

Configuration

Continue by define VMware hosts (vCenter) in the UI:
http://your_web_server/lpar2rrd/
Add credentials for every vCenter if it is not managed by the vCenter
Settings ➡ VMware ➡ New ➡ place credentials (username in format: lpar2rrd@your_domain)
Test vCenter connection via "Test" button.
Run "Connection test" for each added vCenter to assure that it is ok
When you use Virtual Appliance then use "run data load" button and wait a bit.
Your vcenter appears in a few minutes after Ctrl-F5 (browser refresh). That is all!
When you do not use Virtual Appliance then run ./load.sh which starts collecting of VMware data
```
cd /home/lpar2rrd/lpar2rrd
./load.sh 
```
You should see VMware hosts in the UI when load.sh finishes (reload the UI in the browser via Ctrl-F5)

Troubleshooting

If you get "Server version unavailable" during connection test or during manual connection then:
```
cd /home/lpar2rrd/lpar2rrd
. etc/lpar2rrd.cfg
$PERL vmware-lib/apps/connect.pl --server <server name> --username "lpar2rrd"
  Server version unavailable at 'https://vcenter01:443/sdk/vimService.wsdl' at /lpar2rrd/lpar2rrd/vmware-lib/apps/..//VMware/VICommon.pm line 734.
```
1. In case you have LPAR2RRD 7.41 and older version and you have installed VMware Perl SDK through the UI, then reinstall it manually
  Place VMware Perl SDK into /tmp
```
cd /home/lpar2rrd/lpar2rrd
rm -rf vmware-lib/
./bin/vmware_install.sh /tmp
```
2. Make sure firewall does not blocked the traffic in layer 7
3. If above is is not the case or did not help then follow these procedures
Data is not being collected with this error in error.log
```
more /home/lpar2rrd/lpar2rrd/logs/error.log
Thu Feb 18 10:49:01 2016: vmware name: vcenter01 has not array of hosts ?!? : 
...
```
The reason is that user you have configured for retrieving data from the vCenter probably has not read access to whole vCenter and it cannot access all required perf counters.
Consult user rights setup with your vCenter administrator.

Test vCenter connection from the command line:

With entering password manually:

cd /home/lpar2rrd/lpar2rrd
. etc/lpar2rrd.cfg
$PERL vmware-lib/apps/connect.pl --server <vCenter host> --username "lpar2rrd@your_domain" --password "XXXXX"
    Connection Successful
    Server Time : 2016-08-02T06:58:26.355767Z

By using saved password already:
```
$PERL vmware-lib/apps/connect.pl --server <vCenter host> --username "vCenter read only user" --credstore .vmware/credstore/vicredentials.xml
```
You should get the same answer with no password request.
Use the same hostname and username as defined in LPAR2RRD VMware Configuration.

In case of a problem check our forum or contact us via support@lpar2rrd.com

OS agent is add-on feature for monitoring from operating system level.
It is monitoring CPU, memory utilization, paging, LAN and SAN traffic on all adapters.
It requires the OS agent deployment to every monitored VM.
The agent is written in Perl and calls basic OS commands to obtain required statistics like vmstat, iostat.

Additional information about the OS agent:

Prerequisites

Perl
Opened TCP communication between each VM and LPAR2RRD server on port 8162.
Connections are initiated from VM side.
Additional disk space on LPAR2RRD server (about 40MB per each monitored VM)
Create preferable dedicated user lpar2rrd on each VM with minimum rights
```
# useradd -c "LPAR2RRD agent user" -m lpar2rrd
```

OS agent installation (client)

Get the latest OS agent from download page

Linux installation under root

# rpm -Uvh lpar2rrd-agent-5.00-0.noarch.rpm
# rpm -qa|grep lpar2rrd-agent
  lpar2rrd-agent-5.00-0

Solaris x86 installation under root:

# gunzip lpar2rrd-agent-5.00-0.solaris-i86pc.tar.gz
# tar xf lpar2rrd-agent-5.00-0.solaris-i86pc.tar
# pkgadd -d .
  The following packages are available:
  1  lpar2rrd-agent     LPAR2RRD OS agent 5.00
                        (i86pc) 5.00
 ...

Solaris upgrade under root:

# pkgrm lpar2rrd-agent
# pkgadd -d .

Schedule its run every minute from the crontab on every VM.
This line must be placed into lpar2rrd crontab:
```
# su - lpar2rrd
crontab -e 
* * * * * /usr/bin/perl /opt/lpar2rrd-agent/lpar2rrd-agent.pl <LPAR2RRD-SERVER> > /var/tmp/lpar2rrd-agent.out 2>&1
```
Replace <LPAR2RRD-SERVER> by hostname of your LPAR2RRD server.
You might need to add lpar2rrd user into /var/adm/cron/cron.allow (/etc/cron.allow on CentOS 8) under root user if above "crontab -e" fails.
```
# echo "lpar2rrd" >> /var/adm/cron/cron.allow
```

LPAR2RRD server (daemon)

Edit etc/lpar2rrd.cfg and set following (if it is not already set):

vi /home/lpar2rrd/lpar2rrd/etc/lpar2rrd.cfg

LPAR2RRD_AGENT_DAEMON=1

The daemon is started when load.sh starts

./load.sh
  Starting LPAR2RRD daemon on port:8162
  ...

Assure it is running and listening on port 8162:

ps -ef|grep lpar2rrd-daemon
  lpar2rrd 10617010 1 0 Mar 16 - 0:00 /usr/bin/perl -w /home/lpar2rrd/lpar2rrd/bin/lpar2rrd-daemon.pl
netstat -an| grep 8162
  tcp4  0  0  *.8162   *.*   LISTEN

OS agent data graphs will appear in the UI, use Ctrl-F5 to refresh your web browser

Troubleshooting

Client (agent) side:

Test if communication through the LAN is allowed.

telnet  <LPAR2RRD-SERVER> 8162
  Connected to 192.168.1.1   .
  Escape character is '^]'.

This is ok, exit either Ctrl-C or ^].

Check following agent files:
data store: /var/tmp/lpar2rrd-agent-*.txt
error log: /var/tmp/lpar2rrd-agent-*.err
output log: /var/tmp/lpar2rrd-agent.out

run the agent from cmd line:

/usr/bin/perl /opt/lpar2rrd-agent/lpar2rrd-agent.pl -d <LPAR2RRD-SERVER>
  ...
  Agent send     : yes : forced by -d 
  Agent send slp: sending wait: 4
  OS/HMC agent working for server: <LPAR2RRD-SERVER>
  store file for sending is /var/tmp/lpar2rrd-agent-<LPAR2RRD-SERVER>-lpar2rrd.txt

It means that data has been sent to the server, all is fine
Here is example when the agent is not able to sent data :

/usr/bin/perl /opt/lpar2rrd-agent/lpar2rrd-agent.pl -d <LPAR2RRD-SERVER>
  ...
  Agent send     : yes : forced by -d 
  Agent send slp: sending wait: 1
  OS/HMC agent working for server: <LPAR2RRD-SERVER>
  store file for sending is /var/tmp/lpar2rrd-agent-<LPAR2RRD-SERVER>-lpar2rrd.txt
  Agent timed out after : 50 seconds /opt/lpar2rrd-agent/lpar2rrd-agent.pl:265

It means that the agent could not contact the server.
Check communication, port, above telnet example, DNS resolution of the server etc.

Server side:

test if the daemon on LPAR2RRD server is running, and checking the logs

ps -ef|grep lpar2rrd-daemon
  lpar2rrd 10617010 1 0 Mar 16 - 0:00 /usr/bin/perl -w /home/lpar2rrd/lpar2rrd/bin/lpar2rrd-daemon.pl
cd /home/lpar2rrd/lpar2rrd
tail logs/error.log-daemon
tail logs/daemon.out
  new server has been found and registered: Linux (lpar=linuxhost01)
  mkdir : /lpar2rrd/data/Linux/no_hmc/linuxhost01/

It means that new OS agent has been registered from linuxhost01 (Linux stand-alone example)

Test if OS agent data is being stored on the LPAR2RRD server and have actual timestamp:

cd /home/lpar2rrd/lpar2rrd
ls -l data/<server name>/*/<VM name>/*mmm
  -rw-r--r-- 2 lpar2rrd staff  7193736 Mar 17 16:16 data/<server name>/no_hmc/<VM name>/cpu.mmm
  -rw-r--r-- 2 lpar2rrd staff  7193736 Mar 17 16:16 data/<server name>/no_hmc/<VM name>/lan-en1.mmm
  -rw-r--r-- 2 lpar2rrd staff 10790264 Mar 17 16:16 data/<server name>/no_hmc/<VM name>/mem.mmm
  -rw-r--r-- 2 lpar2rrd staff  7193736 Mar 17 16:16 data/<server name>/no_hmc/<VM name>/pgs.mmm
  -rw-r--r-- 2 lpar2rrd staff  7193736 Mar 17 16:16 data/<server name>/no_hmc/<VM name>/san-vscsi0.mmm
  -rw-r--r-- 2 lpar2rrd staff  3597208 Mar 17 16:16 data/<server name>/no_hmc/<VM name>/san_resp-vscsi0.mmm
find data -name mem.mmm -exec ls -l {} \;
  ...

In case of a problem check our forum or contact us via support@lpar2rrd.com.
We would need this data for start of troubleshooting.

Notes

OS agent upgrade

Skip it in case of configuring Virtual Appliance

Install LPAR2RRD server

Download the latest LPAR2RRD server
Upgrade your already running LPAR2RRD instance.

Install it:

# su - lpar2rrd
tar xvf lpar2rrd-7.XX.tar
cd lpar2rrd-7.XX
./install.sh
cd /home/lpar2rrd/lpar2rrd

Schedule to run it from lpar2rrd crontab (it might already exist there)
```
crontab -l | grep load.sh
 
```
Add if it does not exist as above
```
crontab -e

# LPAR2RRD UI
0,30 * * * * /home/lpar2rrd/lpar2rrd/load.sh > /home/lpar2rrd/lpar2rrd/load.out 2>&1 
```
Assure there is just one such entry in crontab.
You might need to add lpar2rrd user into /var/adm/cron/cron.allow (/etc/cron.allow on CentOS 8) if crontab command fails
Allow it for lpar2rrd user as root user.
```
# echo "lpar2rrd" >> /var/adm/cron/cron.allow
```
Initial start from cmd line:
```
cd /home/lpar2rrd/lpar2rrd
./load.sh
```
Go to the web UI: http://<your web server>/lpar2rrd/
Use Ctrl-F5 to refresh the web browser cache.

Troubleshooting

If you have any problems with the UI then check:
(note that the path to Apache logs might be different, search apache logs in /var)

tail /var/log/httpd/error_log             # Apache error log
tail /var/log/httpd/access_log            # Apache access log
tail /var/tmp/lpar2rrd-realt-error.log    # STOR2RRD CGI-BIN log
tail /var/tmp/systemd-private*/tmp/lpar2rrd-realt-error.log # STOR2RRD CGI-BIN log when Linux has enabled private temp

Test of CGI-BIN setup
```
umask 022
cd /home/lpar2rrd/lpar2rrd/
cp bin/test-healthcheck-cgi.sh lpar2rrd-cgi/
```
go to the web browser: http://<your web server>/lpar2rrd/test.html
You should see your Apache, LPAR2RRD, and Operating System variables, if not, then check Apache logs for connected errors