# Setup the Prerequisite Components for Commvault VTL 2.0

Install and setup the prerequisite components in the VTL host.

## RHEL

1. Install the additional packages using the following command:

   On RHEL 7

       Yum install httpd gcc perl kernel-devel sg3_utils iotop sysstat tar mod_ssl postgresql-libs  postgresql-server chkconfig

   On RHEL 8

       Yum install httpd gcc perl kernel-devel sg3_utils iotop sysstat tar mod_ssl postgresql-libs  postgresql-server chkconfig compat-openssl10 elfutils-libelf-devel policycoreutils policycoreutils-python-utils libpq-devel

   On RHEL 9

       Yum install httpd gcc perl kernel-devel sg3_utils iotop sysstat tar mod_ssl postgresql-libs  postgresql-server chkconfig elfutils-libelf-devel policycoreutils policycoreutils-python-utils libpq-devel

2. Ensure that the kernel-devel package version matches the installed kernel version.

   - To get the kernel-devel package version:

         rpm -qa | grep kernel-devel

   - To get the running kernel version:

         uname -r

   - If the kernel-devel version is ahead of the installed kernel then perform the following additional steps:

         yum upgrade kernel
         reboot
         yum upgrade kernel-devel

## Swap Space

The minimum amount of swap space in the OS should be set to 32GB-64GB.

Note

Recommended: Swap space should be set to 10% of memory.

## QLogic Firmware

Note

Recommended: FC HBA should have the firmware revision 8.07 or greater.

1. Login to the VTL system as root user.

2. Use the following command to list the current firmware and driver on each FC HBA port:

       # cat /sys/class/fc_host/host*/symbolic_name

   For Example:

       # cat /sys/class/fc_host/host*/symbolic_name
           QLE2692 FW:v8.08.05 DVR:v8.07.00.38-k
           QLE2692 FW:v8.08.05 DVR:v8.07.00.38-k

## Network Setting for Web Management Interface

Run the following commands to start httpd/apache2 and ensure it starts on system startup:

    sudo systemctl start httpd
    sudo systemctl enable httpd

## Opening Firewall Ports

The following ports must be opened when firewall services are enabled in the VTL host. For more information, see Commvault VTL 2.0 Requirements.

1. Run the following command to open the port for https access:

       sudo firewall-cmd --permanent --add-port=443/tcp

2. Run the following command to open the port for iSCSI access:

       sudo firewall-cmd --permanent --add-port=3260/tcp

3. Reload the firewall service:

       sudo systemctl restart firewalld

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