forked from Sysdeploy/ipxe_scripts
183 lines
5.9 KiB
Plaintext
183 lines
5.9 KiB
Plaintext
#!ipxe
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# I've assume IPv4 for this script, so if we need IPv6, it may need
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# modifications.
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# Require only verified images to boot
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imgtrust --permanent
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# For the "focal" part of the URL string, in case that changes in the future.
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set ubuntu-variant focal
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goto get_arch
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#################
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### This section is at the top, so it's easier to modify.
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:static_ip_boot_setup
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# Open all network interface devices, so we aren't restricted to just the first
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ifopen
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sleep 1
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# Currently we just configure IP info by MAC address. So we iterate over
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# MAC addresses and set the variables. To ensure we use the desired
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# device, we iterate over all devices and simply find matches by
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# MAC address.
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set idx:int32 0
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set successful f
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:loop
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isset ${net${idx}/mac} || goto loop_done
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######################## SET STATIC IP INFO HERE #############################
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# Just copy/paste an entire line to add more
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iseq ${net${idx}/mac:string} "00:01:02:A0:B1:C1" && set ip-dev-name eth0 && set ip-addr "192.168.1.5" && set ip-gateway "192.168.1.1" && set ip-netmask "255.255.255.0" && set ip-dns "1.1.1.1" && set successful t && goto loop_done ||
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iseq ${net${idx}/mac:string} "03:04:05:D4:E5:F6" && set ip-dev-name eth0 && set ip-addr "192.168.99.2" && set ip-gateway "192.168.99.1" && set ip-netmask "255.255.255.0" && set ip-dns "1.1.1.1" && set successful t && goto loop_done ||
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##############################################################################
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inc idx && goto loop
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:loop_done
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# If we have not successfully found a MAC match, then we error, because we
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# also failed DHCP. So there's nothing we can do but fail.
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iseq successful f && goto error_handler
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# If on the other hand we're successful, then we construct the kernel ip= line
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set ip-info ${ip-addr}::${ip-gateway}:${ip-netmask}::${ip-dev-name}:off:${ip-dns}
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# And setup IPXE networking.
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# First, set device info
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set net${idx}/ip ${ip-addr}
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set net${idx}/gateway ${ip-gateway}
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set net${idx}/netmask ${ip-netmask}
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set net${idx}/dns ${ip-dns}
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# Now we close all net devices and enable only the one we need.
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# Sleep a little between, so we don't error by continuing too fast before the
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# device is actually ready
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sleep 1
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ifclose
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sleep 1
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ifopen net${idx}
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sleep 1
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# Set settings again in case the ifdown/ifup cleared them
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set net${idx}/ip ${ip-addr}
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set net${idx}/gateway ${ip-gateway}
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set net${idx}/netmask ${ip-netmask}
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set net${idx}/dns ${ip-dns}
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sleep 1
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# Now we have the ip= line and the IPXE network configured, so we can
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# download and boot.
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goto boot_all
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###
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#################
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# In case we want to... log?? Or do something else.
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:error_handler
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echo "###########################################################"
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echo "An unspecified error has occurred."
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echo "The system will sleep for two minutes and then reboot."
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echo "###########################################################"
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sleep 60
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sleep 60
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reboot
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# Should not occur, but just in case...
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sleep 5
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exit
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# Get relevant CPU arch.
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:get_arch
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iseq ${buildarch} arm32 && goto start_arm32 ||
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iseq ${buildarch} arm64 && goto start_arm64 ||
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iseq ${buildarch} i386 && goto start_i386 ||
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iseq ${buildarch} x86_64 && goto start_amd64 ||
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goto error_handler
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# Builds may be done on 32-bit, but machines will always be 64-bit.
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# Keep this section just in case we want to use 32-bit machines in the future.
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:start_arm32
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goto start_arm64
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:start_i386
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goto start_amd64
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# Set arch info and determine if we can use DHCP for network.
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# Then either boot or goto static IP setup.
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:start_arm64
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set arch-info arm64
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dhcp || goto static_ip_boot_arm64
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sleep 1
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set ip-info dhcp
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goto boot_all
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:start_amd64
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set arch-info amd64
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dhcp || goto static_ip_boot_amd64
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sleep 1
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set ip-info dhcp
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goto boot_all
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# This process should be the same for arm and x86, but I'll leave this section
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# intact in case it turns out it's not the same
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:static_ip_boot_arm64
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goto static_ip_boot_setup
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:static_ip_boot_amd64
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goto static_ip_boot_setup
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:boot_all
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# We use HTTP because IPXE's HTTPS implementation is lacking. So we delegate
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# integrity and validation to imgverify.
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# Naming the squashfs download "/squashfs" is required, otherwise the boot
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# kernel fails to load it in the "root=" part of the kernel cmdline.
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# However, note that imgverify will fail if you refer to it as "/squashfs"
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# instead of "squashfs".
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imgfetch http://images.sysdeploy.org/${ubuntu-variant}/${arch-info}/squashfs /squashfs || goto error_handler
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imgverify --signer images.sysdeploy.org squashfs http://images.sysdeploy.org/${ubuntu-variant}/${arch-info}/squashfs.sig || goto error_handler
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# "--signer" validates against the subject common name field of the signing
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# certificate. That signing cert must have both the digital signature key
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# usage set and the code-signing key usage extension set.
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# By default, IPXE trusts the default Mozilla global root CA list, so
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# make sure you pick a common name with a FQDN you control, even if you're
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# using a custom CA that you import during build.
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initrd http://images.sysdeploy.org/${ubuntu-variant}/${arch-info}/boot-initrd || goto error_handler
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imgverify --signer images.sysdeploy.org boot-initrd http://images.sysdeploy.org/${ubuntu-variant}/${arch-info}/boot-initrd.sig || goto error_handler
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kernel http://images.sysdeploy.org/${ubuntu-variant}/${arch-info}/boot-kernel || goto error_handler
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imgverify --signer images.sysdeploy.org boot-kernel http://images.sysdeploy.org/${ubuntu-variant}/${arch-info}/boot-kernel.sig || goto error_handler
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# Get accurate time so we can set the clock in kernel boot cmdline
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ntp pool.ntp.org || goto error_handler
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boot boot-kernel initrd=boot-initrd rootfstype=squashfs root=/squashfs ip=${ip-info} overlayroot=tmpfs:recurse=0 systemd.clock-usec=${unixtime:int32}000000 ds=nocloud-net;s=https://cloud-init.sysdeploy.org/ || goto error_handler
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# unixtime variable must be used with int32, because that's the only way it
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# will display as decimal digits. unit32 and string both display as hex.
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# Therefore this will stop working in 2038.
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