services: certbot: Create self-signed certificates before certbot runs.
* gnu/services/certbot.scm (<certificate-configuration>): Add start-self-signed? field. (generate-certificate-gexp): New procedure. (certbot-activation): Generate self-signed certificates when start-self-signed? is #t. * doc/guix.texi (Certificate services): Document start-self-signed?. Change-Id: Icfd85ae0c3e29324acbcde6ba283546cf0e27a1d Signed-off-by: Clément Lassieur <clement@lassieur.org>
This commit is contained in:
Carlo Zancanaro
Clément Lassieur
parent
a2b1ef903b
commit
fc0ec9a3cc
2 changed files with 65 additions and 3 deletions
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@ -32690,6 +32690,12 @@ certificates and keys; the shell variable @code{$RENEWED_DOMAINS} will
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contain a space-delimited list of renewed certificate domains (for
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example, @samp{"example.com www.example.com"}.
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@item @code{start-self-signed?} (default: @code{#t})
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Whether to generate an initial self-signed certificate during system
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activation. This option is particularly useful to allow @code{nginx} to
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start before @code{certbot} has run, because @code{certbot} relies on
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@code{nginx} running to perform HTTP challenges.
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@end table
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@end deftp
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@ -35,6 +35,7 @@
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#:use-module (guix records)
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#:use-module (guix gexp)
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#:use-module (srfi srfi-1)
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#:use-module (ice-9 format)
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#:use-module (ice-9 match)
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#:export (certbot-service-type
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certbot-configuration
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@ -64,7 +65,9 @@
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(cleanup-hook certificate-cleanup-hook
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(default #f))
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(deploy-hook certificate-configuration-deploy-hook
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(default #f)))
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(default #f))
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(start-self-signed? certificate-configuration-start-self-signed?
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(default #t)))
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(define-record-type* <certbot-configuration>
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certbot-configuration make-certbot-configuration
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@ -91,7 +94,10 @@
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(define (certbot-deploy-hook name deploy-hook-script)
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"Returns a gexp which creates symlinks for privkey.pem and fullchain.pem
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from /etc/certs/NAME to /etc/letsenctypt/live/NAME. If DEPLOY-HOOK-SCRIPT is
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not #f then it is run after the symlinks have been created."
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not #f then it is run after the symlinks have been created. This wrapping is
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necessary for certificates with start-self-signed? set to #t, as it will
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overwrite the initial self-signed certificates upon the first successful
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deploy."
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(program-file
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(string-append name "-deploy-hook")
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(with-imported-modules '((guix build utils))
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@ -108,7 +114,8 @@ not #f then it is run after the symlinks have been created."
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"/etc/letsencrypt/live/" name "/fullchain.pem")
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#$(string-append "/etc/certs/" name "/fullchain.pem.new"))
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;; Rename over the top of the old ones, if there are any.
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;; Rename over the top of the old ones, just in case they were the
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;; original self-signed certificates.
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(rename-file #$(string-append "/etc/certs/" name "/privkey.pem.new")
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#$(string-append "/etc/certs/" name "/privkey.pem"))
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(rename-file #$(string-append "/etc/certs/" name "/fullchain.pem.new")
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@ -184,6 +191,47 @@ not #f then it is run after the symlinks have been created."
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#~(job '(next-minute-from (next-hour '(0 12)) (list (random 60)))
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#$(certbot-command config))))
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(define (generate-certificate-gexp certbot-cert-directory rsa-key-size)
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(match-lambda
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(($ <certificate-configuration> name (primary-domain other-domains ...)
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challenge
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csr authentication-hook
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cleanup-hook deploy-hook)
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(let (;; Arbitrary default subject, with just the
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;; right domain filled in. These values don't
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;; have any real significance.
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(subject (string-append
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"/C=US/ST=Oregon/L=Portland/O=Company Name/OU=Org/CN="
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primary-domain))
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(alt-names (if (null? other-domains)
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#f
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(format #f "subjectAltName=~{DNS:~a~^,~}"
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other-domains)))
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(directory (string-append "/etc/certs/" (or name primary-domain))))
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#~(when (not (file-exists? #$directory))
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;; We generate self-signed certificates in /etc/certs/{domain},
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;; because certbot is very sensitive to its directory
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;; structure. It refuses to write over the top of existing files,
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;; so we need to use a directory outside of its control.
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;;
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;; These certificates are overwritten by the certbot deploy hook
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;; the first time it successfully obtains a letsencrypt-signed
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;; certificate.
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(mkdir-p #$directory)
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(chmod #$directory #o755)
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(invoke #$(file-append openssl "/bin/openssl")
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"req" "-x509"
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"-newkey" #$(string-append "rsa:" (or rsa-key-size "4096"))
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"-keyout" #$(string-append directory "/privkey.pem")
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"-out" #$(string-append directory "/fullchain.pem")
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"-sha256"
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"-days" "1" ; Only one day, because we expect certbot to run
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"-nodes"
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"-subj" #$subject
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#$@(if alt-names
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(list "-addext" alt-names)
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(list))))))))
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(define (certbot-activation config)
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(let* ((certbot-directory "/var/lib/certbot")
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(certbot-cert-directory "/etc/letsencrypt/live")
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@ -198,6 +246,14 @@ not #f then it is run after the symlinks have been created."
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(mkdir-p #$webroot)
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(mkdir-p #$certbot-directory)
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(mkdir-p #$certbot-cert-directory)
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#$@(let ((rsa-key-size (and rsa-key-size
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(number->string rsa-key-size))))
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(map (generate-certificate-gexp certbot-cert-directory
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rsa-key-size)
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(filter certificate-configuration-start-self-signed?
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certificates)))
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(copy-file #$(certbot-command config) #$script)
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(display #$message)))))))
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