gnu: Add webssh service.
* gnu/services/ssh.scm: (<webssh-configuration>): New record type. (%webssh-configuration-nginx, webssh-service-type): New variables. (webssh-account, webssh-activation, webssh-shepherd-service): New procedures. * doc/guix.texi: Document this.
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Oleg Pykhalov
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@ -15547,6 +15547,81 @@ may cause undefined behaviour.
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@end table
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@end deftp
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@cindex WebSSH
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@deffn {Scheme Variable} webssh-service-type
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This is the type for the @uref{https://webssh.huashengdun.org/, WebSSH}
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program that runs a web SSH client. WebSSH can be run manually from the
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command-line by passing arguments to the binary @command{wssh} from the
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package @code{webssh}, but it can also be run as a Guix service. This
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latter use case is documented here.
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For example, to specify a service running WebSSH on loopback interface
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on port @code{8888} with reject policy with a list of allowed to
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connection hosts, and NGINX as a reverse-proxy to this service listening
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for HTTPS connection, add this call to the operating system's
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@code{services} field:
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@lisp
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(service webssh-service-type
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(webssh-configuration (address "127.0.0.1")
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(port 8888)
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(policy 'reject)
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(known-hosts '("localhost ecdsa-sha2-nistp256 AAAA…"
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"127.0.0.1 ecdsa-sha2-nistp256 AAAA…"))))
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(service nginx-service-type
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(nginx-configuration
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(server-blocks
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(list
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(nginx-server-configuration
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(inherit %webssh-configuration-nginx)
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(server-name '("webssh.example.com"))
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(listen '("443 ssl"))
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(ssl-certificate (letsencrypt-certificate "webssh.example.com"))
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(ssl-certificate-key (letsencrypt-key "webssh.example.com"))
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(locations
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(cons (nginx-location-configuration
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(uri "/.well-known")
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(body '("root /var/www;")))
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(nginx-server-configuration-locations %webssh-configuration-nginx))))))))
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@end lisp
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@end deffn
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@deftp {Data Type} webssh-configuration
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Data type representing the configuration for @code{webssh-service}.
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@table @asis
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@item @code{package} (default: @var{webssh})
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@code{webssh} package to use.
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@item @code{user-name} (default: @var{"webssh"})
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User name or user ID that file transfers to and from that module should take
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place.
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@item @code{group-name} (default: @var{"webssh"})
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Group name or group ID that will be used when accessing the module.
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@item @code{address} (default: @var{#f})
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IP address on which @command{webssh} listens for incoming connections.
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@item @code{port} (default: @var{8888})
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TCP port on which @command{webssh} listens for incoming connections.
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@item @code{policy} (default: @var{#f})
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Connection policy. @var{reject} policy requires to specify @var{known-hosts}.
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@item @code{known-hosts} (default: @var{'()})
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List of hosts which allowed for SSH connection from @command{webssh}.
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@item @code{log-file} (default: @file{"/var/log/webssh.log"})
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Name of the file where @command{rsync} writes its log file.
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@item @code{log-level} (default: @var{#f})
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Logging level.
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@end table
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@end deftp
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@defvr {Scheme Variable} %facebook-host-aliases
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This variable contains a string for use in @file{/etc/hosts}
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(@pxref{Host Names,,, libc, The GNU C Library Reference Manual}). Each
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@ -5,6 +5,7 @@
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;;; Copyright © 2017 Clément Lassieur <clement@lassieur.org>
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;;; Copyright © 2019 Ricardo Wurmus <rekado@elephly.net>
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;;; Copyright © 2020 pinoaffe <pinoaffe@airmail.cc>
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;;; Copyright © 2020 Oleg Pykhalov <go.wigust@gmail.com>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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@ -26,6 +27,7 @@ (define-module (gnu services ssh)
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#:use-module (gnu packages admin)
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#:use-module (gnu services)
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#:use-module (gnu services shepherd)
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#:use-module (gnu services web)
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#:use-module (gnu system pam)
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#:use-module (gnu system shadow)
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#:use-module (guix gexp)
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@ -50,7 +52,12 @@ (define-module (gnu services ssh)
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autossh-configuration
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autossh-configuration?
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autossh-service-type))
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autossh-service-type
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webssh-configuration
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webssh-configuration?
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webssh-service-type
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%webssh-configuration-nginx))
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;;; Commentary:
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;;;
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@ -732,4 +739,126 @@ (define autossh-service-type
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autossh-service-activation)))
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(default-value (autossh-configuration))))
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;;;
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;;; WebSSH
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;;;
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(define-record-type* <webssh-configuration>
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webssh-configuration make-webssh-configuration
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webssh-configuration?
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(package webssh-configuration-package ;package
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(default webssh))
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(user-name webssh-configuration-user-name ;string
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(default "webssh"))
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(group-name webssh-configuration-group-name ;string
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(default "webssh"))
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(policy webssh-configuration-policy ;symbol
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(default #f))
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(known-hosts webssh-configuration-known-hosts ;list of strings
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(default #f))
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(port webssh-configuration-port ;number
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(default #f))
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(address webssh-configuration-address ;string
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(default #f))
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(log-file webssh-configuration-log-file ;string
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(default "/var/log/webssh.log"))
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(log-level webssh-configuration-log-level ;symbol
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(default #f)))
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(define %webssh-configuration-nginx
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(nginx-server-configuration
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(listen '("80"))
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(locations
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(list (nginx-location-configuration
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(uri "/")
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(body '("proxy_pass http://127.0.0.1:8888;"
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"proxy_http_version 1.1;"
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"proxy_read_timeout 300;"
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"proxy_set_header Upgrade $http_upgrade;"
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"proxy_set_header Connection \"upgrade\";"
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"proxy_set_header Host $http_host;"
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"proxy_set_header X-Real-IP $remote_addr;"
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"proxy_set_header X-Real-PORT $remote_port;")))))))
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(define webssh-account
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;; Return the user accounts and user groups for CONFIG.
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(match-lambda
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(($ <webssh-configuration> _ user-name group-name _ _ _ _ _ _)
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(list (user-group
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(name group-name))
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(user-account
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(name user-name)
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(group group-name)
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(comment "webssh privilege separation user")
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(home-directory (string-append "/var/run/" user-name))
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(shell #~(string-append #$shadow "/sbin/nologin")))))))
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(define webssh-activation
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;; Return the activation GEXP for CONFIG.
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(match-lambda
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(($ <webssh-configuration> _ user-name group-name policy known-hosts _ _
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log-file _)
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(with-imported-modules '((guix build utils))
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#~(begin
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(let* ((home-dir (string-append "/var/run/" #$user-name))
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(ssh-dir (string-append home-dir "/.ssh"))
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(known-hosts-file (string-append ssh-dir "/known_hosts")))
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(call-with-output-file #$log-file (const #t))
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(mkdir-p ssh-dir)
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(case '#$policy
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((reject)
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(if '#$known-hosts
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(call-with-output-file known-hosts-file
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(lambda (port)
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(for-each (lambda (host) (display host port) (newline port))
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'#$known-hosts)))
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(display-hint (G_ "webssh: reject policy requires `known-hosts'.")))))
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(for-each (lambda (file)
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(chown file
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(passwd:uid (getpw #$user-name))
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(group:gid (getpw #$group-name))))
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(list #$log-file ssh-dir known-hosts-file))
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(chmod ssh-dir #o700)))))))
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(define webssh-shepherd-service
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(match-lambda
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(($ <webssh-configuration> package user-name group-name policy _ port
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address log-file log-level)
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(list (shepherd-service
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(provision '(webssh))
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(documentation "Run webssh daemon.")
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(start #~(make-forkexec-constructor
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`(,(string-append #$webssh "/bin/wssh")
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,(string-append "--log-file-prefix=" #$log-file)
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,@(case '#$log-level
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((debug) '("--logging=debug"))
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(else '()))
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,@(case '#$policy
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((reject) '("--policy=reject"))
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(else '()))
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,@(if #$port
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(list (string-append "--port=" (number->string #$port)))
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'())
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,@(if #$address
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(list (string-append "--address=" #$address))
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'()))
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#:user #$user-name
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#:group #$group-name))
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(stop #~(make-kill-destructor)))))))
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(define webssh-service-type
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(service-type
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(name 'webssh)
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(extensions
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(list (service-extension shepherd-root-service-type
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webssh-shepherd-service)
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(service-extension account-service-type
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webssh-account)
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(service-extension activation-service-type
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webssh-activation)))
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(default-value (webssh-configuration))
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(description
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"Run the webssh.")))
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;;; ssh.scm ends here
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