OpenVZ Virtuozzo Containers Wiki - User contributions [en]

Container enter failed

2008-03-27T16:04:55Z

Sandro magri: new solutions

'''Problem''': container created succesfully and started.
But when trying to do
<pre>
vzctl enter 101
</pre>
you get
<pre>
container enter failed(?)
</pre>

Using strace, you see:
<pre>
# strace -ff vzctl enter
....
fstat64(...st_mode=S_IFCHR|0620, st_rdev=makedev(136, 0)...) fail
....
</pre>

'''Solution''':
Recompile the kernel with the following option:
<pre>
CONFIG_LEGACY_PTYS=y
</pre>

'''Other solutions''':

1) enter the VE manually creating the LEGACY_PTYS devices

<pre>
vzctl exec 101 /sbin/MAKEDEV tty
vzctl exec 101 /sbin/MAKEDEV pty
vzctl enter 101
</pre>

2A) If you want udev in VE, save the changes forcing udev to make LEGACY_PTYS:

<pre>
cat > /etc/udev/makedev.d/51-udev.nodes
# These device have to be created manually
tty0
tty1
tty2
tty3
....
ttyp0
ttyp1
ttyp2
ttyp3
....
ptyp0
ptyp1
ptyp2
ptyp3
....
</pre>

2B) If you think is better disable udev in VE, comment out in the VE the line:
<pre>
/sbin/start_udev
</pre>
in
<pre>
/etc/rc.d/rc.sysinit
</pre>

Restart the VE and make the devices with MAKEDEV:
<pre>
vzctl exec 101 /sbin/MAKEDEV tty
vzctl exec 101 /sbin/MAKEDEV pty
vzctl enter 101
</pre>
I have used this method also to create zap dummy devices for asterisk in VE:
<pre>
/dev/zap/ctl
/dev/zap/pseudo
/dev/zap/channel
/dev/zap/timer
</pre>

2C) The devices can be setup also with a line in VE config

<pre>
grep DEV /etc/vz/conf/101.conf
DEVNODES="zap/ctl:rw zap/channel:rw zap/pseudo:rw zap/timer:rw "
</pre>

== See also ==

* {{Bug|130}}
* {{Bug|578}}

[[Category: Troubleshooting]]

Container enter failed

2008-03-26T17:52:55Z

Sandro magri:

Container enter failed

2008-03-26T17:50:43Z

Sandro magri: alternative solution for the problem