RE: Daemontools run script

RE: Daemontools run script

[ed neville]

ed neville wrote:
> Hello,
> 
> Here's a subversion scripty from my Debian system YMMV...
> 
> #!/bin/sh
> 
> exec 2>&1
> exec /usr/bin/svnserve -d --foreground

Hello,

Here is an alternative vsftpd script without using tcpserver, in theory
a little more efficient as a new cop of vsftpd is not forked on all
connections

#!/bin/sh

exec 2>&1

PF="/var/run/vsftpd/vsftpd.pid";
VSB="/usr/sbin/vsftpd";

while [ true ] ;
do
        PID=$( cat $PF );
        CMD=$( cat /proc/$PID/cmdline 2>&1 );
        if [ "$CMD" != "$VSB" ] ;
        then
                echo "$VSB not running" ;
                /etc/init.d/vsftpd stop
                /etc/init.d/vsftpd start
        fi ;
        sleep 5;
done ;


-- 
"Unix gives us the power we need to crush those who oppose us"
Regards,
Ed

Re: Daemontools run script

[Wayne Marshall]

On Wed, 2 Aug 2006 10:07:28 +0100
"ed neville" <ed.neville@ukplc.net> wrote:

> 
> Here is an alternative vsftpd script without using tcpserver, in
> theory a little more efficient as a new cop of vsftpd is not forked
> on all connections
> 
> #!/bin/sh
> 
> exec 2>&1
> 
> PF="/var/run/vsftpd/vsftpd.pid";
> VSB="/usr/sbin/vsftpd";
> 
> while [ true ] ;
> do
>         PID=$( cat $PF );
>         CMD=$( cat /proc/$PID/cmdline 2>&1 );
>         if [ "$CMD" != "$VSB" ] ;
>         then
>                 echo "$VSB not running" ;
>                 /etc/init.d/vsftpd stop
>                 /etc/init.d/vsftpd start
>         fi ;
>         sleep 5;
> done ;
> 
> 

This script indicates some (rather massive) confusion about what it
means to run a service under supervision.  All you really want here is
this:

#!/bin/sh
exec 2>&1
exec /usr/sbin/vsftpd
#EOF

Set up your vstpd.conf file with 'background=NO' and 'listen=YES' and
no other run script gymnastics.  The service supervisor will keep track
of the PID for you, and will automatically notice if the service dies,
in which case it will try to restart it.  You will manage the service
directly with svc/sv to start/stop/restart/etc, and none of the slag
from /etc/init.d.

As for not using tcpserver/tcpsvd, that's up to you, but for an ftp
service it is probably not worth the loss of the concurrency limits
and fine-grained connection control possible with
tcprules/ipsvd-instruct (with the -x option).

A few other examples of services may be found here:

  http://thedjbway.org/services.html

Wayne

Re: Daemontools run script

[Laurent Bercot]

> Here is an alternative vsftpd script without using tcpserver, in theory
> a little more efficient as a new cop of vsftpd is not forked on all
> connections

 In addition to what Wayne just said, I believe you need to read the
archives for this mailing-list, as well as the archives for the
log@list.cr.yp.to list, to fully understand what supervision is about.
 Your signature talks about the power of Unix, but the sentence above
shows that you're misunderstanding this power. ;)

-- 
 Laurent

Re: Daemontools run script

[George Georgalis]

On Wed, Aug 02, 2006 at 10:07:28AM +0100, ed neville wrote:
>
>Here is an alternative vsftpd script without using tcpserver, in theory
>a little more efficient as a new cop of vsftpd is not forked on all
>connections
>

thanks for posting, so we all get a chance to learn now and then. :)

// George


-- 
George Georgalis, systems architect, administrator <IXOYE><

Daemontools run script

[ed neville]

Hello,

Here's a subversion scripty from my Debian system YMMV...

#!/bin/sh

exec 2>&1
exec /usr/bin/svnserve -d --foreground

--
"Unix gives us the power we need to crush those who oppose us"  
Regards,
Ed