document EFI boot process with correct ipxe binary

admin-guide/deployment/_static/legacy_boot.puml

@@ -21,9 +21,9 @@ hnote over bootnode
 endhnote
 bootnode -> pxeserver : load PXE config tftp:/tftpboot/pxelinux.cfg/01-$MAC
 note right
-    By manually setting a MAC or IP config the 
-    boot menu can be customised or shortcut. 
-    Most is managed by symlinks. There is the 
+    By manually setting a MAC or IP config the
+    boot menu can be customised or shortcut.
+    Most is managed by symlinks. There is the
     undocumented "link-to-lxprod.py" script for
     manually linking MAC to hostname and hostname
     to "lxprod". At some places this is done the
@@ -57,11 +57,14 @@ bootnode -> dhcp : DHCP request
 dhcp -> bootnode : IP
 bootnode -> sysdb : load iPXE menu http:/ipxe/v1/config?mac=$MAC
 note right
-    Default selection by sydb boot 
+    Default selection by sydb boot
     property "local" or "netboot",
-    later installs Red Hat 7.9.
-    manually selectable are all 
-    Red Hat 7 versions to install,
+    later automatically starts the
+    installer configured in sysdb
+    attribute "ipxe_installer".
+    Manually selectable are all
+    Red Hat 7 versions and Red Hat 8
+    alpha test version to install,
     Windows, a selection of tools
     and "HP SPP".
 endnote

admin-guide/deployment/_static/uefi_boot.puml

@@ -0,0 +1,88 @@
+@startuml
+
+actor admin
+participant "UEFI Node" as bootnode
+participant "QIP DHCP" as dhcp
+participant "pxeserv01.psi.ch" as pxeserver
+participant "boot00.psi.ch" as sysdb
+participant "repo01.psi.ch" as reposerver
+
+admin -> bootnode : boots up
+
+hnote over bootnode
+    EFI
+endhnote
+bootnode -> dhcp : DHCP request
+dhcp -> bootnode : IP + PXE boot location
+bootnode -> pxeserver : load PXE kernel tftp:/tftpboot/shimx64.efi
+bootnode -> pxeserver : load PXE kernel tftp:/tftpboot/grubx64.efi
+
+
+hnote over bootnode
+    GRUB
+endhnote
+bootnode -> pxeserver : load PXE config tftp:/tftpboot/grub.cfg-01-$MAC
+note right
+    By manually setting a MAC or IP config the
+    boot menu can be customised or shortcut.
+end note
+bootnode -> pxeserver : load PXE config tftp:/tftpboot/grub.cfg-$HEX-IP
+bootnode -> pxeserver : load PXE config tftp:/tftpboot/grub.cfg
+bootnode -> sysdb : load GRUB menu http:/grub/v1/config?mac=$MAC
+note right
+    Default selection by sydb boot
+    property "local" or "netboot",
+    later automatically starts the
+    installer configured in sysdb
+    attribute "ipxe_installer".
+    Manually selectable are other
+    version of RHEL 7 and
+    "Windows and Tools Menus".
+endnote
+
+admin -> bootnode :  selects "Windows and Tools Menus"
+note left
+    Now the automatic installation kicks in,
+    but here we show the manual detour over iPXE.
+end note
+
+bootnode -> pxeserver : load iPXE kernel tftp:/tftpboot/boot00.lkrn
+note right
+    https://git.psi.ch/linux-infra/ipxe-build
+    The following steps are by embed/pxe.ipxe
+end note
+
+hnote over bootnode
+    iPXE
+endhnote
+bootnode -> dhcp : DHCP request
+dhcp -> bootnode : IP
+bootnode -> sysdb : load iPXE menu http:/ipxe/v1/config?mac=$MAC
+note right
+    Default selection by sydb boot
+    property "local" or "netboot",
+    later automatically starts the
+    installer configured in sysdb
+    attribute "ipxe_installer".
+    Manually selectable are all
+    Red Hat 7 versions and Red Hat 8
+    alpha test version to install,
+    Windows, a selection of tools
+    and "HP SPP".
+endnote
+bootnode -> reposerver : load initrd http:/iso/rhel-server-7.9-x86_64-dvd/images/pxeboot/initrd.img
+note left
+    Automatic installation in GRUB
+    directly jumps here without iPXE
+end note
+bootnode -> reposerver : load kernel http:/iso/rhel-server-7.9-x86_64-dvd/images/pxeboot/vmlinuz
+
+hnote over bootnode
+    Linux kernel
+endhnote
+bootnode -> reposerver : installation media http:/iso/rhel-server-7.9-x86_64-dvd/
+bootnode -> sysdb : kickstart file http:/kickstart/v1/config?fqdn=$HOSTNAME&instrepo=rhel-server-7.9-x86_64-dvd
+
+@enduml
+
+

admin-guide/deployment/ipxe.rst

@@ -32,6 +32,11 @@ which distribution it is supposed to use. The menu offers other options as well,
 e.g. an interactive iPXE shell and a memory test.
 
 
+Sequence Diagram of the UEFI Boot Process
+--------------------------------------------------
+.. image:: _static/uefi_boot.png
+
+
 Sequence Diagram of the BIOS (Legacy) Boot Process
 --------------------------------------------------
 .. image:: _static/legacy_boot.png