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

HW sizing

Consider usage of our brand new full-stack infrastructure monitoring tool XorMon Next Generation as LPAR2RRD replacement.
It brings a new level of infrastructure monitoring by relying on a modern technology stack.
In particular, reporting, exporting, alerting and presentation capabilities are unique on the market.

Follow installation procedure for your operating system platform

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
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 Perl SDK (not needed in LPAR2RRD v7.90+)

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.

Make sure firewall does not blocked the traffic in layer 7
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 /etc/cron.allow (Linux) or /var/adm/cron/cron.allow (AIX) if 'crontab -e' command fails
Allow it for lpar2rrd user as root user.
```
# echo "lpar2rrd" >> /etc/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

Install LPAR2RRD server (all under lpar2rrd user)

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

Make sure all Perl modules are in place
```
cd /home/lpar2rrd/lpar2rrd
. etc/lpar2rrd.cfg; $PERL bin/perl_modules_check.pl
```
If there is missing "LWP::Protocol::https" then check this docu to fix it

Enable Apache authorisation

su - lpar2rrd
umask 022
cd /home/lpar2rrd/lpar2rrd
cp html/.htaccess www
cp html/.htaccess lpar2rrd-cgi

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 /etc/cron.allow (Linux) or /var/adm/cron/cron.allow (AIX) if 'crontab -e' command fails
Allow it for lpar2rrd user as root user.
```
# echo "lpar2rrd" >> /etc/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