[9fans] auto reconnect for cpu servers

[9fans] auto reconnect for cpu servers

[Steve Simon]

Is there a technique or program that can be used on a diskless
cpu server to make it auto-reconnect when the file server reboots?

I remember reading about the Challange file servers at the labs,
in which (I believe) the cyclone driver would write reboot to
/dev/reboot if the connection dropped.

Is there somthing similar I could do elegantly with a tcp/ip
connection? I could just do a readdir(2) of / every 10 secs and
reboot if that fails but I assume somthing already exists.

-Steve

Re: [9fans] auto reconnect for cpu servers

[andrey mirtchovski]

see aux/reboot. it reboots the cpu server upon loss of remote fs connection.

On Tue, May 12, 2009 at 12:43 PM, Steve Simon <steve@quintile.net> wrote:
> Is there a technique or program that can be used on a diskless
> cpu server to make it auto-reconnect when the file server reboots?
>
> I remember reading about the Challange file servers at the labs,
> in which (I believe) the cyclone driver would write reboot to
> /dev/reboot if the connection dropped.
>
> Is there somthing similar I could do elegantly with a tcp/ip
> connection? I could just do a readdir(2) of / every 10 secs and
> reboot if that fails but I assume somthing already exists.
>
> -Steve
>
>

Re: [9fans] auto reconnect for cpu servers

[Russ Cox]

On Tue, May 12, 2009 at 11:43 AM, Steve Simon <steve@quintile.net> wrote:
> Is there a technique or program that can be used on a diskless
> cpu server to make it auto-reconnect when the file server reboots?
>
> I remember reading about the Challange file servers at the labs,
> in which (I believe) the cyclone driver would write reboot to
> /dev/reboot if the connection dropped.
>
> Is there somthing similar I could do elegantly with a tcp/ip
> connection? I could just do a readdir(2) of / every 10 secs and
> reboot if that fails but I assume somthing already exists.

aux/reboot

there is also recover (gorka should know where the
source is these days) but that requires building a
custom kernel to connect through it, and i'm not
sure how well that particular setup works.

russ

Re: [9fans] auto reconnect for cpu servers

[Gorka Guardiola]

On Tue, May 12, 2009 at 8:50 PM, Russ Cox <rsc@swtch.com> wrote:
>
> there is also recover (gorka should know where the
> source is these days) but that requires building a
> custom kernel to connect through it, and i'm not
> sure how well that particular setup works.
>

The source for recover is in my contrib directory.
I have never tried it in that
setup either.

--
- curiosity sKilled the cat