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machine: hetzner: Allow connections using ssh-agent.

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* gnu/machine/hetzner.scm (<hetzner-configuration>): Add ssh-public-key.
* doc/guix.texi (System Configuration)[hetzner-configuration]: Document it.

Change-Id: I7354ead508b1a4819534c6b22ba1f089749927c2
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
Modified-by: Ludovic Courtès <ludo@gnu.org>
This commit is contained in:
Sergey Trofimov 2025-03-14 16:06:54 +01:00 • committed by Ludovic Courtès
parent 6a440c842b
commit a2ef2bcbfd
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2 changed files with 20 additions and 10 deletions
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13
doc/guix.texi
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@ -46014,9 +46014,14 @@ equivalent. Other server types and their current prices can be found
server type is currently not supported, since its rescue system is too
small to bootstrap a Guix system from.
@item @code{ssh-key}
The file name of the SSH private key to use to authenticate with the
remote host.
@item @code{ssh-key} (default: @code{#f})
If specified, the file name of the SSH private key to use to
authenticate with the remote host.
@item @code{ssh-public-key} (default: extracted from @code{ssh-key})
If specified, either a public key as returned by
@code{string->public-key} or the path to the SSH public key to use to
authenticate with the remote host.
@end table
@ -46080,7 +46085,7 @@ shared vCPUs and 32 GB of RAM on the @code{x86_64} architecture.
(environment hetzner-environment-type)
(configuration (hetzner-configuration
(server-type "cpx51")
(ssh-key "/home/charlie/.ssh/id_rsa")))))
(ssh-public-key "/home/charlie/.ssh/id_rsa.pub")))))
@end lisp
@vindex GUIX_HETZNER_API_TOKEN

17
gnu/machine/hetzner.scm
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@ -77,6 +77,7 @@
hetzner-configuration-location
hetzner-configuration-server-type
hetzner-configuration-ssh-key
hetzner-configuration-ssh-public-key
hetzner-configuration?
hetzner-environment-type))
@ -204,20 +205,24 @@ Have you run 'guix archive --generate-key'?")
(default "fsn1"))
(server-type hetzner-configuration-server-type ; string
(default "cx42"))
(ssh-key hetzner-configuration-ssh-key)) ; string
(ssh-public-key hetzner-configuration-ssh-public-key ; public-key | string
(thunked)
(default (public-key-from-file (hetzner-configuration-ssh-key this-hetzner-configuration)))
(sanitize
(lambda (value)
(if (string? value) (public-key-from-file value) value))))
(ssh-key hetzner-configuration-ssh-key
(default #f))) ; #f | string
(define (hetzner-configuration-ssh-key-fingerprint config)
"Return the SSH public key fingerprint of CONFIG as a string."
(and-let* ((file-name (hetzner-configuration-ssh-key config))
(privkey (private-key-from-file file-name))
(pubkey (private-key->public-key privkey))
(and-let* ((pubkey (hetzner-configuration-ssh-public-key config))
(hash (get-public-key-hash pubkey 'md5)))
(bytevector->hex-string hash)))
(define (hetzner-configuration-ssh-key-public config)
"Return the SSH public key of CONFIG as a string."
(and-let* ((ssh-key (hetzner-configuration-ssh-key config))
(public-key (public-key-from-file ssh-key)))
(let ((public-key (hetzner-configuration-ssh-public-key config)))
(format #f "ssh-~a ~a" (get-key-type public-key)
(public-key->string public-key))))