Date: Sun, 12 Jan 2020 11:18:26 -0600 From: Karl Denninger <karl@denninger.net> To: freebsd-questions@freebsd.org Subject: Re: Using GELI on boot disk with GPT labels? Message-ID: <769689a9-ad6a-8b07-a03f-4986d2990aca@denninger.net> In-Reply-To: <e07b4997-f285-153b-01d3-097c94d08ebf@hashbang0.com> References: <e07b4997-f285-153b-01d3-097c94d08ebf@hashbang0.com>
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This is a cryptographically signed message in MIME format. --------------ms080706060806070507030703 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On 1/12/2020 10:30, Ben Lavery wrote: > Hi all, > > I've recently bought my first home server and am planning to run > FreeBSD 12.1-RELEASE on it. > > I would like to GELI encrypt (password based) all of the hard drives I > put into the server so that if/when they fail I can safely and > confidently dispose of them. > > When setting up the server, I followed a number of recommendations to > use GPT labels for disks with a naming scheme that would allow me to > easily identify where failed disks physically are in the server (there > are 12 bays). > However, when I booted up the server after installing on an installer > configured zpool with GELI encryption, I noted that the disk IDs (e.g. > da0p3) was being used, and this seemed to extend to disks in different > (non-root) zpools. > > I decided to do an experiment in VirtualBox with FreeBSD 12.1-RELEASE: > > 1. To install FreeBSD on ZFS with GELI encryption > =C2=A0=C2=A0 https://gist.github.com/forquare/b4e12938b1240238ef64e3d6b= a5d9669 > > 2. To install FreeBSD on ZFS without GELI > =C2=A0=C2=A0 https://gist.github.com/forquare/8049282d742c94b67f08a81d8= 28e8d13 > > (Links above show commands + output/details of installation) > > I found that when I didn't use GELI I was able to use GPT labels, > however when I _did_ use GELI GPT labels were not available to me. > > Is there a way to encrypt my boot pool _and_ use GPT labels? > If not, I would be interested to learn why. > > Many thanks, > Ben > The boot pool volumes typically come up as "/dev/da.....eli"; the other pools, which you name in (for example) geli_groups=3D"system" geli_system_devices=3D"gpt/rust1-1 gpt/rust1-2 gpt/rust2-1 gpt/rust2-2 gpt/rust3-1 gpt/rust3-2" geli_autodetach=3D"YES" do not, since those are named explicitly and looked for after the kernel is loaded. I presume this is a function of how gptzfsboot enumerates the disks and finds the "boot" flag since that's where that happens and attaches them under geli.=C2=A0 Not sure if you can get it to "dig inside a GPT disk" a= nd find the labels or not. --=20 Karl Denninger karl@denninger.net <mailto:karl@denninger.net> /The Market Ticker/ /[S/MIME encrypted email preferred]/ --------------ms080706060806070507030703 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgMFADCABgkqhkiG9w0BBwEAAKCC DdgwggagMIIEiKADAgECAhMA5EiKghDOXrvfxYxjITXYDdhIMA0GCSqGSIb3DQEBCwUAMIGL MQswCQYDVQQGEwJVUzEQMA4GA1UECAwHRmxvcmlkYTESMBAGA1UEBwwJTmljZXZpbGxlMRkw FwYDVQQKDBBDdWRhIFN5c3RlbXMgTExDMRgwFgYDVQQLDA9DdWRhIFN5c3RlbXMgQ0ExITAf BgNVBAMMGEN1ZGEgU3lzdGVtcyBMTEMgMjAxNyBDQTAeFw0xNzA4MTcxNjQyMTdaFw0yNzA4 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