User Guide for Cisco Network Registrar 7.2
Introduction to Cisco Network Registrar Virtual Appliance
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Introduction to Cisco Network Registrar Virtual Appliance

Table Of Contents

Introduction to Cisco Network Registrar Virtual Appliance

How the Cisco Network Registrar Virtual Appliance Works

How to Download the Cisco Network Registrar Virtual Appliance

Monitoring Disk Space Availability

Increasing the Size of Disk

Troubleshooting


Introduction to Cisco Network Registrar Virtual Appliance


The Cisco Network Registrar virtual appliance aims at eliminating the installation, configuration and maintenance costs associated with running Cisco Network Registrar on a local system. It also guarantees portability and thus reduces the risk in moving Cisco Network Registrar from one machine to another.

You must get a license of Cisco Network Registrar virtual appliance, and download the virtual appliance from Cisco.com. Upon initializing the virtual appliance, you have to add the license file. Cisco Network Registrar will then be up and running, available to be configured. This is applicable for both the local and regional appliance.

This is different from just downloading a copy of Cisco Network Registrar and installing it on a server or virtual machine provided by the customer, in that the operating system on which Cisco Network Registrar runs is also provided in the virtual appliance.

The Cisco Network Registrar virtual appliance supports VMware ESXi 4.x platforms.

To know about the difference between vApp and a virtual appliance, see the User's Guide to Deploying vApps and Virtual Appliances.

See Also

How the Cisco Network Registrar Virtual Appliance Works
Monitoring Disk Space Availability
Increasing the Size of Disk
Troubleshooting

How the Cisco Network Registrar Virtual Appliance Works

The virtual appliance consists of a virtual machine in the OVF format, which contains a runnable guest OS (CentOS 5.4) and Cisco Network Registrar 7.2 installed on that OS. When the virtual appliance is installed, Cisco Network Registrar is already installed and is started by the virtual machine power-up like in the case of any regular server power-up.

How to Download the Cisco Network Registrar Virtual Appliance

Do the following to download the Cisco Network Registrar virtual appliance:


Step 1 You have to point the ESXi systems at a Cisco web-site and download an OVF format virtual appliance containing the guest operating system and a running version of Cisco Network Registrar and power up the virtual machine/appliance.

Step 2 Set a root password for the virtual appliance when you are prompted to. There is no default password. For more details on deployment the virtual appliance and configuration on first boot, see Installation Guide for Cisco Network Registrar.


Two virtual appliances will be created, one for a local Cisco Network Registrar cluster and one for a regional cluster. Each of these will have the security kit installed.

Monitoring Disk Space Availability

To view the disk space availability, do the following:


Step 1 In the vSphere Client window, select the host/server on which the virtual Cisco Network Registrar appliance resides.

Step 2 Click Storage Views to see the list of the machines hosted by the server and the details about the space currently used by each machine.

Also, you can go to the Virtual Machines tab to view both the Provisioned Space and the Used Space by machine.

Step 3 Click Summary.

The Resources area of the Summary tab, displays the capacity of the disk and the CPU and memory used.

Step 4 Select the virtual machine and click the Summary tab.

The Resources area of the Summary tab displays the disk space details for the machine.


To monitor the disk space availability using the console, do the following:


Step 1 Select the virtual machine in the vSphere Client window and either click the Console tab on the right pane or right-click the virtual machine name and choose Open Console.

Step 2 Login as root and type df -k. The disk space details are displayed.

If the disk space on the disk mounted on /var/nwreg2 is not enough, then you should increase the size of the disk (see "Increasing the Size of Disk" section).


Increasing the Size of Disk

The cnr_growfilesystem script causes the data partition, /dev/sdb1 to grow to be the size of the entire data disk. It is trivial to expand the size of the data disk that the operating system sees, using VMware. To ensure that the operating sytem recognizes the bigger disk, you have to restart the VM and run the cnr_growfilesystem after increasing the size of the disk.


Note Before running the cnr_growfilesystem script, ensure that you backup the entire /var/nwreg2/ data and that it is not stored anywhere in the file system under /var/nwreg2. Running the cnr_growfilesystem script after restarting the VM ensures that the filesystem uses all the space in the partition.


If you need a bigger disk, do the following:


Step 1 Stop the VM.

Step 2 Increase the size of the disk by changing the size in the Virtual Machine Properties window. To open the Virtual Machine Properties window, you have to select the host name, right-click, and choose Edit Settings.

Step 3 Restart the VM. This ensures that the partition for the Cisco Network Registrar data covers the entire disk.

Step 4 Run the script cnr_growfilesystem. This script will:

Stop Cisco Network Registrar

Unmount the data partition

Increase the size of the partition to be the size of the disk

Turn the ext3 filesystem into an ext2 filesystem

Expand the filesystem to be the size of the partition (which is now the size of the disk)

Turn the ext2 filesystem back into an ext3 filesystem

Remount the disk


Troubleshooting

If you experience any issues while working with the Cisco Network Registrar virtual appliance, we recommend you to do the following:

Examine the log files in /var/nwreg2/{local | regional}/logs. Look particularly for errors in the log files as these signal exceptional conditions. If you are unable to resolve the problem and you have purchased Cisco support, then submit a case to Cisco Technical Assistance Center (TAC) regarding the problem.