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Unable to open PTY: No such file or directory - CentOS i386 Minimal precreated template [message #32532]

Thu, 14 August 2008 10:29

fgomes
Messages: 29
Registered: August 2006

Junior Member

I've installed on a new server the last version of CentOS (5.2) i386, and installed OpenVZ on it. Then I have downloaded the minimal and the default CentOS 5 template (for i386 platform). When I create a VE based on the minimal template I've got this error when I try to use vzctl enter:

Unable to open PTY: No such file or directory

I've also tried the solution described here:

http://www.sherin.in/index.php/2008/05/15/unable-to-open-pty -no-such-file-or-directory

but after rebooting the VE the problem still persist. Is it a problem with the minimal template? Any fix available?

I've also made a VE based on the CentOS 5 default template, and it worked well. I just noticed that the default gateway is 192.0.2.1, and even if I change it on the /etc/sysconfig/network it gets replaced after rebooting the VE. Is this somehow hardcoded somewhere? I just want to understand if this is normal, the VE is working well! I'm using OpenVZ on several other servers (x64) and this doesn't happen on these servers (but these are 64 bit installations, and using CentOS 4 and 5.1, not 5.2)

Thanks in advance

Fernando

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Re: Unable to open PTY: No such file or directory - CentOS i386 Minimal precreated template [message #32541 is a reply to message #32532]

Thu, 14 August 2008 16:18

augustz
Messages: 15
Registered: September 2006

Junior Member

I've had exactly the same problem using the template you described. The only difference is I am on x64.

I'm wondering if we should try rebuilding the Centos 5 minimal template. Do you have the installed package list of it?

- August

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Re: Unable to open PTY: No such file or directory - CentOS i386 Minimal precreated template [message #32548 is a reply to message #32532]

Fri, 15 August 2008 10:01

maratrus
Messages: 1495
Registered: August 2007
Location: Moscow

Senior Member

Hi,

have you installed anything inside CentOS-minimal based VE?
"rpm -qa | grep udev"?
Please, look at this page
http://wiki.openvz.org/Container_enter_failed

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Re: Unable to open PTY: No such file or directory - CentOS i386 Minimal precreated template [message #32587 is a reply to message #32548]

Mon, 18 August 2008 10:03

fgomes
Messages: 29
Registered: August 2006

Junior Member

Hi, I read the link you sent, and the following commands enable me to enter the VE:

vzctl exec 101 /sbin/MAKEDEV tty
vzctl exec 101 /sbin/MAKEDEV pty
vzctl enter 101

but this command fails:

cat > /etc/udev/makedev.d/51-udev.nodes

So, everytime I need to enter the VE I should do the first three commands. I decided to use the centos 5 default templete where this problem doesn't exist. Thanks for your help

Fernando

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Re: Unable to open PTY: No such file or directory - CentOS i386 Minimal precreated template [message #32589 is a reply to message #32587]

Mon, 18 August 2008 10:16

maratrus
Messages: 1495
Registered: August 2007
Location: Moscow

Senior Member

Hi,

Quote:

but this command fails:
cat > /etc/udev/makedev.d/51-udev.nodes

What does it mean "fails"?
The article suggests you to create /etc/udev/makedev.d/51-udev.nodes file and put down there the devices you want to be created automatically.
You can create that file manually and put there appropriate devices (tty, pty etc)

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