# Installation

## Minimal HW/VM Requirements
- 4GB RAM
- 33GB Disk

## Network Installation

The machine you want to install needs to be [registered in `sysdb`](../admin-guide/deployment/sample). 

Optional you can set `netboot` and RHEL 8.7 installer but that can also be selected manually in be boot menu:

```
bob node netboot $FQDN
bob node set-attr $FQDN ipxe_installer=rhel87install
```
### Installation with UEFI
Start the machine and select network boot (if not already the default), then you get following menu:  
![Grub default menu](installation/grub_default.png)

There select "Install Red Hat Enterprise Linux 8.7"
![Grub menu selection for iPXE](installation/grub_select.png)  


__NOTE:__ After the installation the boot order will be changed to localboot again! So if you reinstall make sure that you re-set the bootorder via the efi menu or the commandline: https://linux.die.net/man/8/efibootmgr
```
[root@lx-test-02 ~]# efibootmgr
BootCurrent: 0004
BootOrder: 0004,0002,0000,0001,0003
Boot0000* EFI Virtual disk (0.0)
Boot0001* EFI VMware Virtual SATA CDROM Drive (0.0)
Boot0002* EFI Network
Boot0003* EFI Internal Shell (Unsupported option)
Boot0004* Red Hat Enterprise Linux

[root@lx-test-02 ~]# efibootmgr --bootorder 2,4,0,1,3
```
(there is no need to have the leading 000 )

### Installation with Legacy BIOS 
Start the machine and select network boot (if not already the default), then you get following menu:  
![PXE default menu](installation/pxe_default.png)

There select "Red Hat Enterprise Linux 7 Network Install Menu" to get into the iPXE menu, where you can do also a lot of other stuff.  
![PXE menu selection for iPXE](installation/pxe_select.png)  
(I plan to get rid of above menu as it also breaks automatic installation by `sysdb` configuration).

The iPXE menu is then generated according to `sysdb` and its default depends on the configuration, there, but you may override it manualy:  
![iPXE menu with local boot default](installation/ipxe_default.png)

![select RHEL 8 installation](installation/ipxe_select_rhel8.png)