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(define-module (mitch services tailscale)
#:use-module (gnu services)
#:use-module (gnu services shepherd)
#:use-module (gnu services configuration)
#:use-module (guix records)
#:use-module (guix gexp)
#:use-module (ice-9 match)
#:use-module (mitch packages tailscale)
#:use-module (gnu packages linux)
#:use-module (guix licenses)
#:export (tailscaled-service-type tailscaled-configuration))
;; TODO: https://tailscale.com/kb/1188/linux-dns/#dhcp-dhclient-overwriting-etcresolvconf
(define-record-type* <tailscaled-configuration>
tailscaled-configuration make-tailscaled-configuration
tailscaled-configuration?
(tailscale tailscaled-configuration-tailscale
(default tailscale))
(listen-port tailscaled-configuration-listen-port
(default "41641"))
(state-file tailscaled-configuration-state-file
(default "tailscaled.state")))
(define (tailscaled-activation config)
"Run tailscaled --cleanup"
#~(begin
(system* #$(file-append tailscale "/bin/tailscaled") "--cleanup")))
(define (tailscaled-shepherd-service config)
"Return a <shepherd-service> for Tailscaled with CONFIG"
(let ((tailscale
(tailscaled-configuration-tailscale config))
(listen-port
(tailscaled-configuration-listen-port config))
(state-file
(tailscaled-configuration-state-file config))
(environment #~(list (string-append
"PATH=" ; iptables is required for tailscale to work
(string-append #$iptables "/sbin")
":"
(string-append #$iptables "/bin")))))
(list
(shepherd-service
(provision '(tailscaled))
(requirement '(networking)) ;; services this depends on
(start #~(make-forkexec-constructor
(list #$(file-append tailscale "/bin/tailscaled")
"-state" #$state-file
;"-port" #$listen-port
"-verbose" "10")
#:environment-variables #$environment
#:log-file "/var/log/tailscaled.log"))
(stop #~(make-kill-destructor))))))
(define tailscaled-service-type
(service-type
(name 'tailscaled)
(extensions
(list (service-extension shepherd-root-service-type
tailscaled-shepherd-service)
(service-extension activation-service-type
tailscaled-activation)))
(default-value (tailscaled-configuration))
(description "Launch tailscaled.")))
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