Date: Fri, 29 Nov 2024 13:50:16 -0700 From: John Nielsen <lists@jnielsen.net> To: Peter Blok <pblok@bsd4all.org> Cc: freebsd-net@freebsd.org Subject: Re: EFI boot with iPXE Message-ID: <BB3917BD-6D54-4C69-B89E-9520FCF56A0F@jnielsen.net> In-Reply-To: <0F7B3EDE-D3B4-4693-B84F-A68AD6089A76@bsd4all.org> References: <0F7B3EDE-D3B4-4693-B84F-A68AD6089A76@bsd4all.org>
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--Apple-Mail-FD65037E-1E61-4595-B6D0-C38506741881 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable > On Nov 7, 2024, at 1:23=E2=80=AFPM, Peter Blok <pblok@bsd4all.org> wrote: >=20 > I have tried to boot over iSCSI using PXE using the ports isboot-kmod. It w= orked after many tries, but it is not automatic yet. >=20 > At the loader.efi prompt I do: > set currdev=3Dzfs:zroot/ROOT/default: > load /boot/kernel/kernel > load /boot/kernel/opensolaris.ko > load /boot/kernel/zfs.ko > load /boot/kernel/acpi_wmi.ko > load /boot/kernel/smbus.ko > load /boot/kernel/ichsmb.ko > load /boot/kernel/uhid.ko > load /boot/kernel/wmt.ko > load /boot/kernel/iscsi.ko > load /boot/modules/isboot.ko > boot >=20 > And it starts. There is no local storage so everything is really coming ov= er the net. >=20 > Obviously it doesn=E2=80=99t read what is in loader.conf and I=E2=80=99m p= uzzled what the boot flow is once you have loader.efi loaded. I can put curr= dev in loader.env but it doesn=E2=80=99t set it although set qqq=3Dsomething= shows up when I type show, so I have the right file. >=20 > How can I boot without having to type the commands? Typically all you need to do is add the following to /boot/loader.conf after= installing the isboot port: isboot_load=3D"YES=E2=80=9D =46rom there it=E2=80=99s up to the boot firmware (iPXE in your case) to mak= e the initial connection to the target, populate the iBFT, load the boot blo= cks and perform the early boot. The loader uses the iSCSI disk just like a l= ocal disk to do its job including load the kernel and modules (including isb= oot) in to memory. When the kernel begins execution it probes devices and eventually gets to is= boot. If isboot locates a valid iBFT it will parse it and use that informati= on to re-establish the connection with the iSCSI target (as well as bring up= the needed network interface etc). =46rom there the iSCSI volume(s) should be available as regular da(4) device= s and boot continues like it would on any other type of storage. The root volume being ZFS adds some moving parts but there=E2=80=99s no reas= on it wouldn=E2=80=99t work. If you can, try to replicate your setup using l= ocal storage. Once that is working then you just need to add iPXE and the si= ngle line above to loader.conf. JN --Apple-Mail-FD65037E-1E61-4595-B6D0-C38506741881 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable <html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D= utf-8"></head><body dir=3D"auto"><div dir=3D"ltr"></div><div dir=3D"ltr"><br= ></div><div dir=3D"ltr"><br><div dir=3D"ltr"></div><blockquote type=3D"cite"= >On Nov 7, 2024, at 1:23=E2=80=AFPM, Peter Blok <pblok@bsd4all.org> wr= ote:<br><br></blockquote></div><blockquote type=3D"cite"><div dir=3D"ltr"><s= pan>I have tried to boot over iSCSI using PXE using the ports isboot-kmod. I= t worked after many tries, but it is not automatic yet.</span><br><span></sp= an><br><span>At the loader.efi prompt I do:</span><br><span>set currdev=3Dzf= s:zroot/ROOT/default:</span><br><span>load /boot/kernel/kernel</span><br><sp= an>load /boot/kernel/opensolaris.ko</span><br><span>load /boot/kernel/zfs.ko= </span><br><span>load /boot/kernel/acpi_wmi.ko</span><br><span>load /boot/ke= rnel/smbus.ko</span><br><span>load /boot/kernel/ichsmb.ko</span><br><span>lo= ad /boot/kernel/uhid.ko</span><br><span>load /boot/kernel/wmt.ko</span><br><= span>load /boot/kernel/iscsi.ko</span><br><span>load /boot/modules/isboot.ko= </span><br><span>boot</span><br><span></span><br><span>And it starts. There i= s no local storage so everything is really coming over the net.</span><br><s= pan></span><br><span>Obviously it doesn=E2=80=99t read what is in loader.con= f and I=E2=80=99m puzzled what the boot flow is once you have loader.efi loa= ded. I can put currdev in loader.env but it doesn=E2=80=99t set it although s= et qqq=3Dsomething shows up when I type show, so I have the right file.</spa= n><br><span></span><br><span>How can I boot without having to type the comma= nds?</span><br></div></blockquote><div><br></div>Typically all you need to d= o is add the following to /boot/loader.conf after installing the isboot port= :<div><span style=3D"caret-color: rgb(5, 5, 5); color: rgb(5, 5, 5); font-fa= mily: var(--code-font); font-size: 12.75px;"><br></span></div><div><span sty= le=3D"caret-color: rgb(5, 5, 5); color: rgb(5, 5, 5); font-family: var(--cod= e-font); font-size: 12.75px;">isboot_load=3D"YES=E2=80=9D</span></div><div><= span style=3D"caret-color: rgb(5, 5, 5); color: rgb(5, 5, 5); font-family: v= ar(--code-font); font-size: 12.75px;"><br></span></div><div>=46rom there it=E2= =80=99s up to the boot firmware (iPXE in your case) to make the initial conn= ection to the target, populate the iBFT, load the boot blocks and perform th= e early boot. The loader uses the iSCSI disk just like a local disk to do it= s job including load the kernel and modules (including isboot) in to memory.= </div><div><br></div><div>When the kernel begins execution it probes devices= and eventually gets to isboot. If isboot locates a valid iBFT it will parse= it and use that information to re-establish the connection with the iSCSI t= arget (as well as bring up the needed network interface etc).</div><div><br>= </div><div>=46rom there the iSCSI volume(s) should be available as regular d= a(4) devices and boot continues like it would on any other type of storage.<= /div><div><br></div><div>The root volume being ZFS adds some moving parts bu= t there=E2=80=99s no reason it wouldn=E2=80=99t work. If you can, try to rep= licate your setup using local storage. Once that is working then you just ne= ed to add iPXE and the single line above to loader.conf.</div><div><br></div= ><div>JN</div><div><br></div><div><br></div><div><br></div></body></html>= --Apple-Mail-FD65037E-1E61-4595-B6D0-C38506741881--
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