4.1. Preparing Environment

This section explains how to set up the environment for installation over network.

4.1.1. Installing PXE Components

You will need these components to set up a PXE environment:

  • TFTP server. This is a machine that allows your servers to boot and install Virtuozzo Infrastructure Platform over the network. Any machine that can run Linux and is accessible over network can be a TFTP server.

  • DHCP server. This is a standard DHCP machine serving TCP/IP settings to computers on your network.

  • HTTP server. This is a machine serving Virtuozzo Infrastructure Platform installation files over network.

    You can also share Virtuozzo Infrastructure Platform distribution over network via FTP (e.g., with vsftpd) or NFS.

The easiest way is to set up all of these on the same physical machine:

# yum install tftp-server syslinux httpd dhcp

You can also use servers that already exist in your infrastructure. For example, skip httpd and dhcp if you already have the HTTP and DHCP servers.

4.1.2. Configuring TFTP Server

This section describes how to configure the TFTP server for BIOS-based systems. For information on how to configure it for installing Virtuozzo Infrastructure Platform on EFI-based systems, see the Red Hat Enterprise Linux Installation Guide.

Do the following:

  1. On the server, open the /etc/xinetd.d/tftp file, and edit it as follows:

    service tftp
    {
    disable         = no
    socket_type     = dgram
    protocol        = udp
    wait            = yes
    user            = root
    server          = /usr/sbin/in.tftpd
    server_args     = -v -s /tftpboot
    per_source      = 11
    cps             = 100 2
    flags           = IPv4
    }
    

    Once you are done, save the file.

  2. Create the /tftpboot directory and copy the following files to it: vmlinuz, initrd.img, menu.c32, pxelinux.0.

    These files are necessary to start installation. You can find the first two in the /images/pxeboot directory of the Virtuozzo Infrastructure Platform distribution. The last two files are located in the syslinux directory (usually /usr/share/syslinux or /usr/lib/syslinux).

  3. Create the /tftpboot/pxelinux.cfg directory and make the default file in it.

    # mkdir /tftpboot/pxelinux.cfg
    # touch /tftpboot/pxelinux.cfg/default
    
  4. Add the following lines to default:

    default menu.c32
    prompt 0
    timeout 100
    ontimeout INSTALL
    menu title Boot Menu
    label INSTALL
            menu label Install
            kernel vmlinuz
            append initrd=initrd.img ip=dhcp
    

    For detailed information on parameters you can specify in this file, see the documentation for syslinux.

  5. Restart the xinetd service:

    # /etc/init.d/xinetd restart
    
  6. If necessary, configure firewall to allow access to the TFTP server (on port 69 by default).

    When running the TFTP server, you might get the “Permission denied” error. In this case, you may try to fix the problem by running the following command: # restorecon -Rv /tftboot/.

4.1.3. Setting Up DHCP Server

To set up a DHCP server for installing Virtuozzo Infrastructure Platform over network, add the following strings to the dhcpd.conf file, which is usually located in the /etc or /etc/dhcp directory:

next-server <PXE_server_IP_address>;
filename "/pxelinux.0";

To configure a DHCP server for installation on EFI-based systems, specify filename "/bootx64.efi" instead of filename "/pxelinux.0" in the dhcpd.conf file, where /bootx64.efi is the directory to which you copied the EFI boot images when setting up the TFTP server.

4.1.4. Setting Up HTTP Server

Now that you have set up the TFTP and DHCP servers, you need to make the Virtuozzo Infrastructure Platform distribution files available for installation over the network. To do this:

  1. Set up an HTTP server (or configure the one you already have).

  2. Copy the contents of your Virtuozzo Infrastructure Platform installation DVD to some directory on the HTTP server (e.g., /var/www/html/distrib).

  3. On the PXE server, specify the path to the Virtuozzo Infrastructure Platform installation files in the append line of the /tftpboot/pxelinux.cfg/default file.

    For EFI-based systems, the file you need to edit has the name of /tftpboot/pxelinux.cfg/efidefault or /tftpboot/pxelinux.cfg/<PXE_server_IP_address>.

    Assuming that the HTTP server is at 198.123.123.198, the installation files are in /var/www/html/distrib/, and DocumentRoot is set to /var/www/html, the default file may look like this:

    default menu.c32
    prompt 0
    timeout 100
    ontimeout INSTALL
    menu title Boot Menu
    label INSTALL
            menu label Install
            kernel vmlinuz
            append initrd=initrd.img ip=dhcp inst.repo=http://198.123.123.198/distrib