Red Hat Summit第7章 Preparing a PXE installation source
You must configure TFTP and DHCP on a PXE server to enable PXE boot and network installation.
7.1. Network installation overview
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A network installation allows you to install Red Hat Enterprise Linux to a system that has access to an installation server. At a minimum, two systems are required for a network installation:
- Server
- A system running a DHCP server, an HTTP, HTTPS, FTP, or NFS server, and in the PXE boot case, a TFTP server. Although each server can run on a different physical system, the procedures in this section assume a single system is running all servers.
- Client
- The system to which you are installing Red Hat Enterprise Linux. Once installation starts, the client queries the DHCP server, receives the boot files from the HTTP or TFTP server, and downloads the installation environment image from the HTTP, HTTPS, FTP or NFS server. Unlike other installation methods, the client does not require any physical boot media for the installation to start.
To boot a client from the network, enable network boot in the firmware or in a quick boot menu on the client. On some hardware, the option to boot from a network might be disabled, or not available.
The workflow to prepare for an installation of Red Hat Enterprise Linux from a network by using HTTP or PXE is as follows:
- Export the installation ISO image or the installation tree to an NFS, HTTPS, HTTP, or FTP server.
- Configure the HTTP or TFTP server and DHCP server, and start the HTTP or TFTP service on the server.
- Boot the client and start the installation.
You can choose between the following network boot protocols:
- HTTP
- Use the HTTP boot if your client UEFI supports it. HTTP boot is usually more reliable.
- PXE (TFTP)
- PXE boot is more widely supported by client systems, but sending the boot files over TFTP protocol might be slow and result in timeout failures.
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