libvirt users - Sep 2013 - Re: how to mount /dev/shm on system container

i have create a system container test1  and trying to mount /dev/shm inside
a container

<domain type='lxc'>
<name>test1</name>
<memory>102400</memory>
<os>
  <type>exe</type>
  <init>/sbin/init</init>
</os>
<vcpu>1</vcpu>
<devices>
<console type='pty'/>
<emulator>/usr/libexec/libvirt_lxc</emulator>
<filesystem type='mount' accessmode='passthrough'>
  <source dir='/lxc/test1/'/>
  <target dir='/'/>
</filesystem>
<interface type='bridge'>
  <source bridge='br0'/>
</interface>
</devices>
</domain>


network settings on host
/etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE="eth0"
BOOTPROTO="dhcp"
BRIDGE="br0"
HWADDR="08:00:27:97:D6:35"
NM_CONTROLLED="no"
ONBOOT="yes"
TYPE="Ethernet"
UUID="fe9d7236-f418-47ab-b472-6e6caabdd807"


/etc/sysconfig/network-scripts/ifcfg-br0
DEVICE="br0"
TYPE="Bridge"
USERCTL="no"
ONBOOT="yes"
BOOTPROTO="dhcp"
NM_CONTROLLED="no"


network setting on host
/lxc/test1/etc/sysconfig/network-scripts/ifcfg-eth0
EVICE=eth0
ONBOOT=yes
TYPE=Ethernet
BOOTPROTO=dhcp
PREFIX=24
USERCTL=yes
IPV6INIT=no


vim /lxc/test1/etc/fstab
none /dev/shm tmpfs defaults 0 0

chroot /lxc/test1

mkdir -m 1777 /dev/shm


After mounting /dev/shm on container, my container gets hang.

Has anyone tried to mount /dev/shm ?


Thanks,

Aarti Sawant

NTTDATA OSS Center Pune

On Tue, Sep 24, 2013 at 03:07:11PM +0530, Aarti Sawant
wrote:
> i have create a system container test1  and trying to mount /dev/shm inside
> a container
> 
> <domain type='lxc'>
> <name>test1</name>
> <memory>102400</memory>
> <os>
>   <type>exe</type>
>   <init>/sbin/init</init>
> </os>
> <vcpu>1</vcpu>
> <devices>
> <console type='pty'/>
> <emulator>/usr/libexec/libvirt_lxc</emulator>
> <filesystem type='mount' accessmode='passthrough'>
>   <source dir='/lxc/test1/'/>
>   <target dir='/'/>
> </filesystem>
> <interface type='bridge'>
>   <source bridge='br0'/>
> </interface>
> </devices>
> </domain>
You need to add a RAM filesystem

  http://libvirt.org/formatdomain.html#elementsFilesystems

eg

   <filesystem type='ram'> 
       <source usage='10000'/>
       <target dir='/dev/shm'/>
   </filesystem>

usage is in KB

Daniel
-- 
|: http://berrange.com      -o-    http://www.flickr.com/photos/dberrange/ :|
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Hello,
thanks a lot it worked..

Thanks
Aarti Sawant
NTTDATA OSS Center Pune


On Tue, Sep 24, 2013 at 3:44 PM, Daniel P. Berrange
<berrange@redhat.com>wrote:
> On Tue, Sep 24, 2013 at 03:07:11PM +0530, Aarti Sawant wrote:
> > i have create a system container test1  and trying to mount /dev/shm
> inside
> > a container
> >
> > <domain type='lxc'>
> > <name>test1</name>
> > <memory>102400</memory>
> > <os>
> >   <type>exe</type>
> >   <init>/sbin/init</init>
> > </os>
> > <vcpu>1</vcpu>
> > <devices>
> > <console type='pty'/>
> > <emulator>/usr/libexec/libvirt_lxc</emulator>
> > <filesystem type='mount'
accessmode='passthrough'>
> >   <source dir='/lxc/test1/'/>
> >   <target dir='/'/>
> > </filesystem>
> > <interface type='bridge'>
> >   <source bridge='br0'/>
> > </interface>
> > </devices>
> > </domain>
>
> You need to add a RAM filesystem
>
>   http://libvirt.org/formatdomain.html#elementsFilesystems
>
> eg
>
>    <filesystem type='ram'>
>        <source usage='10000'/>
>        <target dir='/dev/shm'/>
>    </filesystem>
>
> usage is in KB
>
> Daniel
> --
> |: http://berrange.com      -o-   
http://www.flickr.com/photos/dberrange/:|
> |: http://libvirt.org              -o-            
http://virt-manager.org:|
> |: http://autobuild.org       -o-        
http://search.cpan.org/~danberr/:|
> |: http://entangle-photo.org       -o-      
http://live.gnome.org/gtk-vnc:|
>