Features of installing package that works as service

Features of installing package that works as service

[znavko]

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Hello, Guix Help! I think GuixSD is cute, but manual is so incomprehensible https://www.gnu.org/software/guix/manual/en/guix.html <https://www.gnu.org/software/guix/manual/en/guix.html> 

I want to clear all possible options when I install packages that work as services.
For example, can get postgresql by typing by non-root user `$ guix package -i postgresql` and run it? How to run it?

Can I install postgresql and run it only when I need?

Do I need install it only from defining service in config.scm and typing `# guix system reconfigure config.scm` ?

Manual "6.2.15 Defining Services" has lot of variables and I do not know where to find them definitions.

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Re: Features of installing package that works as service

[Joshua Branson]

<znavko@tutanota.com> writes:

> Hello, Guix Help! I think GuixSD is cute, but manual is so incomprehensible https://www.gnu.org/software/guix/manual/en/guix.html 

Have you read the entire manual?  I know I haven't.  Before your
complain that the manual is difficult to understand, be sure that you
read all of it.  There's lots of good details in the manual. :)

>
> I want to clear all possible options when I install packages that work as services.
> For example, can get postgresql by typing by non-root user `$ guix package -i postgresql` and run it? How to run it?

If you intend to run it yourself, you can run that command.  But you
don't want to actually run guix package -i postgresql.

>
> Can I install postgresql and run it only when I need?
>
> Do I need install it only from defining service in config.scm and typing `# guix system reconfigure config.scm` ?

Basically yes.

https://www.gnu.org/software/guix/manual/en/guix.html#Database-Services

The (gnu services databases) module provides the following services. 

So your config would look a little like:

(use-modules (gnu services database))

...

;; your postgresql service definition here.
;; I think the below is correct, but I'm not certain.

(services (cons* 
(service postgresql-service-type)
%base-services
))

>
> Manual "6.2.15 Defining Services" has lot of variables and I do not know where to find them definitions.

Re: Features of installing package that works as service

[znavko]

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Thank you, Joshua Branson!
Your code helped me a bit

(use-modules  (gnu services databases) )
(services (cons*  (service postgresql-service-type)
%desktop-services))

After `guix reconfigure /etc/config.scm` and reboot postgresql server is running:
# herd status | grep postgre
 + postgres

The only one change I want to do. Please, how to disable auto-start of postgresql? I need it sometimes and want to start it manually only. I think there should be some guile function like '(service postgresql-service-type (config no-autostart))', but qwant search does not give the answer. 
I've read 'start' and 'stop' options here https://www.gnu.org/software/guix/manual/en/guix.html#Shepherd-Services <https://www.gnu.org/software/guix/manual/en/guix.html#Shepherd-Services> 
and here
https://www.gnu.org/software/shepherd/manual/shepherd.html#index-Configuration-file <https://www.gnu.org/software/shepherd/manual/shepherd.html#index-Configuration-file>
 and tried to find out here http://git.savannah.gnu.org/cgit/guix.git/tree/gnu/services/databases.scm <http://git.savannah.gnu.org/cgit/guix.git/tree/gnu/services/databases.scm>
But I did not get the answer for those 10 minutes I've spend there.
I tried with no success:
(service postgresql-service-type (unstartable '()) )
(service postgresql-service-type (config (unstartable '()) )(service postgresql-service-type (let (unstartable '())) )

Please, how to do this?


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Re: Features of installing package that works as service

[znavko]

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Hello, Guix Help! guix understands this config, but still I have avahi-daemon and ntpd services. They are not started, I want delete them at all. How to do that?

;;this is znavko's cute config

(use-modules (gnu) (gnu system nss)
             (gnu services desktop)
             (srfi srfi-1) ;;for remove function
             (gnu services networking) ;;for remove ntp
             (gnu services avahi) ;;for remove avahi
             (gnu services xorg)
             (gnu services databases);;for postgres
)
(use-service-modules desktop)
(use-package-modules certs gnome)

(operating-system (host-name "antelope") (timezone "Europe/Moscow") (locale "en_US.utf8")
  (bootloader (bootloader-configuration
                (bootloader grub-bootloader)
                (target "/dev/sda")))
  (file-systems (cons (file-system
                        (device "/dev/sda1") (mount-point "/") (type "ext4"))
                      %base-file-systems))
  (swap-devices '("/dev/sda2"))

  (users (cons* (user-account (name "bob") (group "users")
                (supplementary-groups '("wheel" "netdev" "audio" "video"))
                (home-directory "/home/bob"))
                (user-account (name "alice") (group "users")
                (supplementary-groups '("wheel" "netdev" "audio" "video"))
                (home-directory "/home/alice"))
                (user-account (name "mom") (group "users")
                (supplementary-groups '("wheel" "netdev" "audio" "video"))
                (home-directory "/home/mom"))
               %base-user-accounts))

  ;; This is where we specify system-wide packages.
  (packages (cons* nss-certs         ;for HTTPS access
                   gvfs              ;for user mounts
                   %base-packages))

  (services (cons*  ;;(tor-service)
                    (service postgresql-service-type)
                    (xfce-desktop-service)

                    (modify-services      
                        (remove (lambda (service)
                            (eq? (service-kind service) 
                                ntp-service-type avahi-service))

                            %desktop-services
                        );end of remove
                        (elogind-service-type
                            c => (elogind-configuration
                                (handle-lid-switch 'ignore)))
                    );;end of modify desktop-srvices

  ));;end of services

  ;; Allow resolution of '.local' host names with mDNS.
  (name-service-switch %mdns-host-lookup-nss))

  

# herd status
Started:
...
 + xorg-server
Stopped:
 - avahi-daemon
 - networking
 - ntpd
 - swap-/dev/sda2
 - term-auto
 - user-homes
 - wpa-supplicant
  
How delete at all avahi-daemon and ntpd?

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Re: Features of installing package that works as service

[Joshua Branson]

<znavko@tutanota.com> writes:

I'm not sure what's wrong here.  As far as I can understand you code
makes sense and should remove the services that you don't want.  


You've probably seen this bit of code here:
https://www.gnu.org/software/guix/manual/en/guix.html#Base-Services

(remove (lambda (service)
          (eq? (service-kind service) avahi-service-type))
        %desktop-services)

Which is what you have written down.

I'm at a loss.  I wish I knew what was wrong with wrote you have
written.

Joshua

> Hello, Guix Help! guix understands this config, but still I have avahi-daemon and ntpd services. They are not started, I want delete them at all. How to do
> that?
>
> ;;this is znavko's cute config
>
> (use-modules (gnu) (gnu system nss)
>              (gnu services desktop)
>              (srfi srfi-1) ;;for remove function
>              (gnu services networking) ;;for remove ntp
>              (gnu services avahi) ;;for remove avahi
>              (gnu services xorg)
>              (gnu services databases);;for postgres
> )
> (use-service-modules desktop)
> (use-package-modules certs gnome)
>
> (operating-system (host-name "antelope") (timezone "Europe/Moscow") (locale "en_US.utf8")
>   (bootloader (bootloader-configuration
>                 (bootloader grub-bootloader)
>                 (target "/dev/sda")))
>   (file-systems (cons (file-system
>                         (device "/dev/sda1") (mount-point "/") (type "ext4"))
>                       %base-file-systems))
>   (swap-devices '("/dev/sda2"))
>
>   (users (cons* (user-account (name "bob") (group "users")
>                 (supplementary-groups '("wheel" "netdev" "audio" "video"))
>                 (home-directory "/home/bob"))
>                 (user-account (name "alice") (group "users")
>                 (supplementary-groups '("wheel" "netdev" "audio" "video"))
>                 (home-directory "/home/alice"))
>                 (user-account (name "mom") (group "users")
>                 (supplementary-groups '("wheel" "netdev" "audio" "video"))
>                 (home-directory "/home/mom"))
>                %base-user-accounts))
>
>   ;; This is where we specify system-wide packages.
>   (packages (cons* nss-certs         ;for HTTPS access
>                    gvfs              ;for user mounts
>                    %base-packages))
>
>   (services (cons*  ;;(tor-service)
>                     (service postgresql-service-type)
>                     (xfce-desktop-service)
>
>                     (modify-services      
>                         (remove (lambda (service)
>                             (eq? (service-kind service) 
>                                 ntp-service-type avahi-service))
>
>                             %desktop-services
>                         );end of remove
>                         (elogind-service-type
>                             c => (elogind-configuration
>                                 (handle-lid-switch 'ignore)))
>                     );;end of modify desktop-srvices
>
>   ));;end of services
>
>   ;; Allow resolution of '.local' host names with mDNS.
>   (name-service-switch %mdns-host-lookup-nss))
>
> # herd status
> Started:
> ...
>  + xorg-server
> Stopped:
>  - avahi-daemon
>  - networking
>  - ntpd
>  - swap-/dev/sda2
>  - term-auto
>  - user-homes
>  - wpa-supplicant
>
> How delete at all avahi-daemon and ntpd?

Re: Features of installing package that works as service

[Tonton]

Welcome to Guix!

On Tue, 27 Nov 2018 10:38:22 +0100 (CET)
<znavko@tutanota.com> wrote:

> Hello, Guix Help! I think GuixSD is cute, but manual is so incomprehensible
> https://www.gnu.org/software/guix/manual/en/guix.html
> <https://www.gnu.org/software/guix/manual/en/guix.html> 

Parts of the manual may be a bit difficult, but I think we're trying to make
it good and understandable for everyone. If you have suggestions I encourage
you to send them in an email, or even better as a documentation patch.

> 
> I want to clear all possible options when I install packages that work as
> services. For example, can get postgresql by typing by non-root user `$
> guix package -i postgresql` and run it? How to run it?
> 
> Can I install postgresql and run it only when I need?

Yes and yes. You can add it as a service in your config.scm and then stop and
start it when needed. Or you can run it as a package like you describe here.

> 
> Do I need install it only from defining service in config.scm and typing `#
> guix system reconfigure config.scm` ?
> 
> Manual "6.2.15 Defining Services" has lot of variables and I do not know
> where to find them definitions.

Defining packages and services is next level (it's not very difficult, but
not something you should need for regular systems). Look at the sections
under "System Configuration" sepcifically the pages under Services.

HTH
Tonton