4.2.7. Other Parameters

`firstboot`

The firstboot parameter starts the interactive configuration menu. On systems that have a Red Hat Enterprise Virtualization Hypervisor installed and some systems with LVM volumes, the firstboot parameter may be required to trigger the interactive installation.

Combination of the firstboot parameter with the storage_init parameter erases data on the specified disk. The reinstall parameter is an alias for firstboot. The two are able to be used interchangeably.

`install`

The install parameter forces the installation menu to be displayed on boot even when the Hypervisor has previously been installed. The install parameter is intended to be used when booting from CD-ROM, DVD, USB, or PXE media.

`local_boot`

The local_boot parameter is an alias for the upgrade parameter.

`netconsole`

The netconsole parameter sets the address of a server to which kernel messages should be logged. The netconsole parameter takes an IP address or fully qualified domain name and, optionally, a port (the default port is 25285).

Example 4.24. Setting a NetConsole Server at `rhev.example.com:25285`

netconsole=rhev.example.com:25285

`nocheck`

The nocheck parameter will skip the MD5 check of the installation ISO, which might be time consuming if the media is remote or slow.

`management_server`

The management_server parameter is required for an automated installation.

The management_server parameter sets the address of the Red Hat Enterprise Virtualization Manager. The management_server parameter takes an IP address or fully qualified domain name and, optionally, a port (the default port is 8443). It is required for an automated installation.

Example 4.25. Connecting to a Red Hat Enterprise Virtualization Manager at `rhev.example.com:8443`

management_server=rhev.example.com:8443

`mem_overcommit`

The mem_overcommit parameter specifies the multiplier to use for adding extra swap to support memory over-commit. The default over-commit value is 0.5.

Example 4.26. Changing the Memory Overcommit to 0.7

mem_overcommit=0.7

`qemu_pxe`

The qemu_pxe parameter is used to select which network boot loader is used in virtual machines. Possible values are gpxe and etherboot. For compatibility with Red Hat Enterprise Virtualization Hypervisor 5.4-2.1, the default value is etherboot.

Example 4.27. Using the `gpxe` Boot Loader

qemu_pxe=gpxe

`reinstall`

The reinstall parameter starts the interactive configuration menu. On systems that have a Red Hat Enterprise Virtualization Hypervisor installed and some systems with LVM volumes, the reinstall parameter may be required to trigger the interactive installation.

`upgrade`

The upgrade parameter will upgrade the existing hypervisor image to the version provided by the boot media. The hypervisor will be automatically upgraded and rebooted once complete. If a hypervisor image is not yet installed, the image will be installed to the device selected with the storage_init parameter. When performing an upgrade, the previous boot entry is saved as BACKUP in grub.conf. If the reboot following the upgrade procedure fails, the BACKUP boot entry will be automatically selected as the new default.

`uninstall`

The uninstall parameter removes an existing Red Hat Enterprise Virtualization installation. The host volume group will be removed and the system rebooted. For further information on Hypervisor uninstallation see Appendix C, Uninstallation.