Re: question about pty,agetty for an intermediate virtual server image

[ng0]

Leo Famulari transcribed 2.8K bytes:
> On Fri, Mar 31, 2017 at 12:59:56PM +0000, ng0 wrote:
> > before I go ahead and create an intermediate image  -  I'd like to explore
> > the option of getting IN-Berlin closer into the creation of the 'deploy'
> > process of Guix which is being worked on  -  I need to find out how the
> > redirection to      "/sbin/agetty --keep-baud 115200 38400 9600 ttyS0 vt102"
> > can be honored.
> > As far as I understand, we use mingetty which according to the mingetty
> > manpages is not suited for tasks agetty can do.
> > 
> > IN-Berlin runs a Consoleserver which redirects ssh logins to it via
> > "virsh console $vserver" to the /sbin/agetty (on debian vservers) on
> > your server. The KVM configuration can be seen below.
> > 
> > How can I achieve this (the agetty part) with GuixSD?
> 
> You can use the agetty-service, like this
> 
> (kernel-arguments
>   ;; Adjust these arguments as desired.
>   '("console=ttyS0,115200n8 gfxpayload=text earlyprintk=serial,tty,115200"))
> 
> (services
>   (cons (agetty-service (agetty-configuration
>                           (tty "ttys0")
>                           (term "vt102")
>                           (keep-baud? #t)
>                           (baud-rate "115200,38400,9600)))
>         %base-services))                          
> 
> And you will probably want a non-graphical GRUB menu as well (this
> should be parameterized eventually...):

Yeah, that would be useful as it is not uncommon for servers.

> diff --git a/gnu/system/grub.scm b/gnu/system/grub.scm
> index b18b8be6d..d94b1a266 100644
> --- a/gnu/system/grub.scm
> +++ b/gnu/system/grub.scm
> @@ -197,7 +197,7 @@ system string---e.g., \"x86_64-linux\"."
>      insmod efi_uga
>    fi
>  
> -  terminal_output gfxterm
> +  terminal_output console
>  "
>          ""))
>  
> Finally, you can test it in QEMU by appending '-serial pty' to the
> QEMU invocation. When it starts, QEMU will tell you which pty it's
> using, and you can connect to it with something like `screen`.

Thanks! I'll give it a try and get back to you when I run into problems.