83 lines
2.6 KiB
Plaintext
83 lines
2.6 KiB
Plaintext
@startuml
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actor admin
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participant "BIOS Node\n(legacy boot)" as bootnode
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participant "QIP DHCP" as dhcp
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participant "pxeserv01.psi.ch" as pxeserver
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participant "boot00.psi.ch" as sysdb
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participant "repo00.psi.ch" as reposerver
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admin -> bootnode : boots up
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hnote over bootnode
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BIOS
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endhnote
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bootnode -> dhcp : DHCP request
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dhcp -> bootnode : IP + PXE boot location
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bootnode -> pxeserver : load PXE kernel tftp:/tftpboot/pxelinux.0
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hnote over bootnode
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PXE
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endhnote
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bootnode -> pxeserver : load PXE config tftp:/tftpboot/pxelinux.cfg/01-$MAC
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note right
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By manually setting a MAC or IP config the
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boot menu can be customised or shortcut.
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Most is managed by symlinks. There is the
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undocumented "link-to-lxprod.py" script for
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manually linking MAC to hostname and hostname
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to "lxprod". At some places this is done the
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opposite by linking hostname to MAC to "lxprod".
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Having the **link to "lxprod" loads directly**
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**the iPXE kernel "boot00.lkrn"**, shortcutting
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the manual selection below.
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end note
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bootnode -> pxeserver : load PXE config tftp:/tftpboot/pxelinux.cfg/$HEX-IP
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bootnode -> pxeserver : load PXE config tftp:/tftpboot/pxelinux.cfg/default
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note right
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**Default selection is local boot**,
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but also visible and manually selectable are
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- Red Hat 7 Network Install
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- Windows Network install
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and many more which are hidden, but can
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be selected from the prompt, some with
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comments from 2013.
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end note
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admin -> bootnode : selects "Red Hat 7 Network Install"
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bootnode -> pxeserver : load iPXE kernel tftp:/tftpboot/boot00.lkrn
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note right
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https://git.psi.ch/linux-infra/ipxe-build
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The following steps are by embed/pxe.ipxe
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end note
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hnote over bootnode
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iPXE
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endhnote
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bootnode -> dhcp : DHCP request
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dhcp -> bootnode : IP
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bootnode -> sysdb : load iPXE menu http:/ipxe/v1/config?mac=$MAC
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note right
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Default selection by sydb boot
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property "local" or "netboot",
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later automatically starts the
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installer configured in sysdb
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attribute "ipxe_installer".
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Manually selectable are all
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Red Hat 7 versions and Red Hat 8
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alpha test version to install,
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Windows, a selection of tools
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and "HP SPP".
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endnote
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bootnode -> reposerver : load initrd http:/iso/rhel-server-7.9-x86_64-dvd/images/pxeboot/initrd.img
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bootnode -> reposerver : load kernel http:/iso/rhel-server-7.9-x86_64-dvd/images/pxeboot/vmlinuz
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hnote over bootnode
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Linux kernel
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endhnote
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bootnode -> reposerver : installation media http:/iso/rhel-server-7.9-x86_64-dvd/
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bootnode -> sysdb : kickstart file http:/kickstart/v1/config?fqdn=$HOSTNAME&instrepo=rhel-server-7.9-x86_64-dvd
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@enduml
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