Subject: Re: [vserver] vserver configuation options
From: Nirmal Guhan <vavatutu@gmail.com>
Date: Sun, 13 Jun 2010 23:14:17 -0700
Sun, 13 Jun 2010 23:14:17 -0700
Any help on this? Please help.

Thanks,
--Nirmal

On Fri, Jun 11, 2010 at 11:55 AM, Nirmal Guhan <vavatutu@gmail.com> wrote:

>
> On Fri, Jun 11, 2010 at 12:56 AM, Corey Wright <undefined@pobox.com>wrote:
>
>> On Thu, 10 Jun 2010 18:51:27 -0700
>> Nirmal Guhan <vavatutu@gmail.com> wrote:
>>
>> > Hi,
>> >
>> > Am just looking at
>> > http://www.nongnu.org/util-vserver/doc/conf/configuration.html to see
>> how
>> > I can modify the cpu and/or memory related parameters. Running into an
>> > error with post-start :
>> >
>> > #vserver newdeb start
>> > Starting enhanced syslogd: rsyslogd.
>> > /usr/local/etc/vservers/newdeb/scripts/post-start: line 1: !/bin/bash:
>> No
>> > such file or directory
>> >
>> > An error occured after executing the vserver startup sequence. This
>> > means that some processes may exist in the created context and the
>> > manual execution of
>> >
>> >   /usr/local/sbin/vserver '/usr/local/etc/vservers/newdeb' stop
>> >
>> > is recommended to fix this.
>> >
>> > # cat post-start
>> > !/bin/bash
>>
>> #!/bin/bash
>>
>> http://en.wikipedia.org/wiki/Shebang_(Unix)<http://en.wikipedia.org/wiki/Shebang_%28Unix%29>
>>
>> :-)
>>
>
> Oh! My bad. Nice catch.
>
>>
>> > echo "In post start"
>> >
>> > #ls /vservers/newdeb/bin/ | grep bash
>> > bash
>> >
>> > Not sure what I am missing!!
>> >
>> > Also, I configured cgroup in /etc/fstab and after restart am not able to
>> > find /dev/cgroup directory at all.
>> >
>> > none                    /cgroup                 cgroup  defaults
>>  0
>> > 0    (I need this for lxc)
>> > none                    /dev/cgroup                 cgroup  defaults
>> > 0 0
>> >
>> > # ls -l /dev/cgroup
>> > ls: cannot access /dev/cgroup: No such file or directory
>>
>> mkdir /dev/cgroup
>>
>> or if your /dev is managed by udev, then you probably want to tell udev to
>> create that directory every start-up.  see
>> http://linux-vserver.org/util-vserver:Cgroups for how to do it at least
>> under debian lenny (ie "mkdir /lib/udev/devices/cgroup").
>>
>
> I had earlier created /dev/cgroup but as it disappeared after reboot. Now I
> don't see that issue but after the udev suggestion in the above wiki (I use
> fedora 12 that uses udev).
>
> I still can't get it to work :-(
>
> [root@1-fedora ~]# vserver newdeb start
> /usr/local/lib/util-vserver/vserver.functions: line 1506:
> /dev/cgroup/newdeb/tasks: No such file or directory
>
>
> Failed to start vserver 'newdeb'
>
> [root@1-fedora ~]# mount | grep cgroup
> none on /cgroup type cgroup (rw)
> vserver on /dev/cgroup type cgroup (rw)
>
> I do see files under /dev/cgroup.
>
> [root@guhan-fedora dev]# ls -l /usr/local/etc/vservers/.defaults/cgroup
> total 0
> [root@guhan-fedora dev]# ls -l /lib/udev/devices/cgroup
> total 0
>
> One interesting thing I found is : while /dev/cgroup/newdeb/tasks does not
> exist, I can see that /dev/cgroup/<pid>/tasks exists where pid "seems" to be
> the pid of "vserver newdeb start" command.
>
> --Nirmal
>
>
>
>>
>> > I can find /cgroup though but looks like vserver would need /dev/cgroup
>> > (atleast I don't find my guest at /cgroup when it is running).
>> >
>> > Please help.
>> >
>> > Thanks,
>> > Nirmal
>> >
>>
>> corey
>> --
>> undefined@pobox.com
>>
>
>


Any help on this? Please help.

Thanks,
--Nirmal

On Fri, Jun 11, 2010 at 11:55 AM, Nirmal Guhan <vavatutu@gmail.com> wrote:

On Fri, Jun 11, 2010 at 12:56 AM, Corey Wright <undefined@pobox.com> wrote:
On Thu, 10 Jun 2010 18:51:27 -0700
Nirmal Guhan <vavatutu@gmail.com> wrote:

> Hi,
>
> Am just looking at
> http://www.nongnu.org/util-vserver/doc/conf/configuration.html to see how
> I can modify the cpu and/or memory related parameters. Running into an
> error with post-start :
>
> #vserver newdeb start
> Starting enhanced syslogd: rsyslogd.
> /usr/local/etc/vservers/newdeb/scripts/post-start: line 1: !/bin/bash: No
> such file or directory
>
> An error occured after executing the vserver startup sequence. This
> means that some processes may exist in the created context and the
> manual execution of
>
>   /usr/local/sbin/vserver '/usr/local/etc/vservers/newdeb' stop
>
> is recommended to fix this.
>
> # cat post-start
> !/bin/bash

#!/bin/bash

http://en.wikipedia.org/wiki/Shebang (Unix)

:-)

Oh! My bad. Nice catch.

> echo "In post start"
>
> #ls /vservers/newdeb/bin/ | grep bash
> bash
>
> Not sure what I am missing!!
>
> Also, I configured cgroup in /etc/fstab and after restart am not able to
> find /dev/cgroup directory at all.
>
> none                    /cgroup                 cgroup  defaults        0
> 0    (I need this for lxc)
> none                    /dev/cgroup                 cgroup  defaults
> 0 0
>
> # ls -l /dev/cgroup
> ls: cannot access /dev/cgroup: No such file or directory

mkdir /dev/cgroup

or if your /dev is managed by udev, then you probably want to tell udev to
create that directory every start-up.  see
http://linux-vserver.org/util-vserver:Cgroups for how to do it at least
under debian lenny (ie "mkdir /lib/udev/devices/cgroup").

I had earlier created /dev/cgroup but as it disappeared after reboot. Now I don't see that issue but after the udev suggestion in the above wiki (I use fedora 12 that uses udev).

I still can't get it to work :-(

[root@1-fedora ~]# vserver newdeb start
/usr/local/lib/util-vserver/vserver.functions: line 1506: /dev/cgroup/newdeb/tasks: No such file or directory


Failed to start vserver 'newdeb'

[root@1-fedora ~]# mount | grep cgroup
none on /cgroup type cgroup (rw)
vserver on /dev/cgroup type cgroup (rw)

I do see files under /dev/cgroup.

[root@guhan-fedora dev]# ls -l /usr/local/etc/vservers/.defaults/cgroup
total 0
[root@guhan-fedora dev]# ls -l /lib/udev/devices/cgroup
total 0

One interesting thing I found is : while /dev/cgroup/newdeb/tasks does not exist, I can see that /dev/cgroup/<pid>/tasks exists where pid "seems" to be the pid of "vserver newdeb start" command.

--Nirmal

 

> I can find /cgroup though but looks like vserver would need /dev/cgroup
> (atleast I don't find my guest at /cgroup when it is running).
>
> Please help.
>
> Thanks,
> Nirmal
>

corey
--
undefined@pobox.com