Install Guide

NOTE: The puppet_certname.sh script that runs on startup of the VM clone attempts to

install the ruby “inifile” and “hashie” gems from the Internet. If there is no internet connection, it

generates error messages to communicate with rubygems.org.

4. It would be less error-prone to require the user to install the gems in the source VM rather than

having them installed when the clone VM starts up. To do this, you need to:

• Remove the gem install lines from puppet_certname.sh.

• Manually run the gem installs either with the instructions on how to set a proxy or how to install

the gems by downloading them directly.

5. You must update the Network Interfaces so that it will not be associated with the base virtual

machine MAC address (varies based on OS, examples below). To update it, run the following:

RHEL/CentOS:

rm /etc/udev/rules.d/70-persistent-net.rules

rm/lib/udev/rules.d/75-persistent-net-generator.rules

sed -i "/^HWADDR/d" /etc/sysconfig/network-scripts/ifcfg-eth0

RHEL 7

Remove MAC Address from the interface configuration file. For example,

sed -i "/^HWADDR/d" /etc/sysconfig/network-scripts/ifcfg-ens192

NOTE: Interface naming on RHEL 7 VM depends on the various factors provided at https://

access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/

Networking_Guide/ch-Consistent_Network_Device_Naming.html#sec-

Naming_Schemes_Hierarchy

Debian/Ubuntu:

rm /lib/udev/rules.d/75-persistent-net-generator.rules

6. Configure cronjob to execute the puppet_certname.sh script and restart or start the puppet service.

Type the following commands:

crontab –e

a. Add the following line to this file and then save and exit the file.

@reboot /usr/local/bin/puppet_certname.sh; /etc/init.d/puppet restart

RHEL 7

@reboot /usr/local/bin/puppet_certname.sh

b. Run the following command, and ensure that you see the above line, to verify the crontab is

updated as expected or not,

crontab -l

7. After completing customization, turn off the virtual machine. To create a virtual machine template,

follow the appropriate steps for virtualization environment.

NOTE: After preparing the base virtual machine, in case the virtual machine is restarted, the

puppet verification file will need to be deleted from system. This file can be found in Windows

at C:\ProgramData\puppet_verification_run.txt or in Linux at /var/lib/

puppet_verification_run.txt.