Re: Guix "ops"

[ludo@gnu.org (Ludovic Courtès)]

David Thompson <dthompson2@worcester.edu> skribis:

> To take it for a spin, add something like this to a file, let's call it
> "deployment.scm":
>
>     (use-modules (gnu) (guix gexp))
>     (use-service-modules databases)
>     (use-package-modules web databases)
>     
>     (define dummy-fs
>       (file-system
>         (mount-point "/")
>         (device "dummy")
>         (type "dummy")))
>     
>     (define grub
>       (grub-configuration (device "/dev/sda")))
>     
>     (define timezone "America/New_York")
>     (define locale "en_US.UTF-8")
>     
>     ;; TODO: Needs nginx-service.
>     (define web-server
>       (machine
>        (name "web-server")
>        (system (operating-system
>                  (host-name "web-server")
>                  (timezone timezone)
>                  (locale locale)
>                  (bootloader grub)
>                  (file-systems
>                   (list dummy-fs %binary-format-file-system))
>                  (packages
>                   (cons nginx %base-packages))))
>        (platform (local-vm #:ip-address "10.0.2.10"))))
>     
>     (define db-server
>       (machine
>        (name "db-server")
>        (system (operating-system
>                  (host-name "db-server")
>                  (timezone timezone)
>                  (locale locale)
>                  (bootloader grub)
>                  (file-systems
>                   (list dummy-fs %binary-format-file-system))
>                  (services
>                   (cons (postgresql-service)
>                         %base-services))
>                  (packages (cons postgresql %base-packages))))
>        (platform (local-vm #:ip-address "10.0.2.11"))))
>     
>     (deployment
>      (name "test-deployment")
>      (machines (list web-server db-server)))
>     
> Then run the following from your git checkout:
>
>     ./pre-inst-env guix deploy spawn /path/to/deployment.scm

Woow, that’s very nice.  The declarations are straightforward and
immediately understandable, I think, which is cool.

Perhaps one addition eventually would be to allow IPs to be
automatically allocated and have host name lookup DTRT in each VM.

> Now, there's still much work to be done.  Spawning local, temporary VMs
> has gotten me over some initial hurdles, but now we need to write a
> platform adapter for something more serious so that we can determine the
> requirements for "real world" deployment scenarios.  Perhaps we should
> look into writing an OpenStack adapter.

As discussed on IRC, I was unsure about OpenStack, but I’ll trust your
judgment.  Maybe Cyril can comment?

Thanks,
Ludo’.