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Aarti Sawant

2013-Jul-31 07:16 UTC

[libvirt-users] start lxc container on fedora 19

hello,

i am new to lxc, i have created a lxc container on fedora 19
i created a container rootfs of fedora 19 by using
yum --installroot=/containers/test1 --releasever=19 install openssh

test1.xml file for container test1
<domain type="lxc">
  <name>test1</name>
  <vcpu placement="static">1</vcpu>
  <cputune>
    <shares>1024</shares>
    <period>1000000</period>
  </cputune>
  <memtune>
    <hard_limit unit="M">1024</hard_limit>
    <soft_limit unit="M">128</soft_limit>
    <min_guarantee unit="M">64</min_guarantee>
  </memtune>
  <blkiotune>
    <weight>800</weight>
  </blkiotune>
  <memory unit="KiB">102400</memory>
  <os>
    <type>exe</type>
    <init>/bin/bash</init>
  </os>
  <clock offset="utc"/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <devices>
    <emulator>/usr/libexec/libvirt_lxc</emulator>
    <filesystem accessmode="passthrough" type="mount">
      <source dir="/containers/test1/"/>
      <target dir="/"/>
    </filesystem>
    <filesystem accessmode="passthrough" type="mount">
      <source dir="/containers/test1/var"/>
      <target dir="/var"/>
    </filesystem>
    <filesystem accessmode="passthrough" type="mount">
      <source dir="/containers/test1/dev"/>
      <target dir="/dev"/>
    </filesystem>
    <filesystem accessmode="passthrough" type="mount">
      <source dir="/containers/test1/root"/>
      <target dir="/root"/>
    </filesystem>
    <filesystem accessmode="passthrough" type="mount">
      <source dir="/containers/test1/home"/>
      <target dir="/home"/>
    </filesystem>
    <filesystem accessmode="passthrough" type="mount">
      <source dir="/containers/test1/opt"/>
      <target dir="/opt"/>
    </filesystem>
    <filesystem accessmode="passthrough" type="mount">
      <source dir="/containers/test1/media"/>
      <target dir="/media"/>
    </filesystem>
    <filesystem accessmode="passthrough" type="mount">
      <source dir="/containers/test1/bin"/>
      <target dir="/bin"/>
    </filesystem>
    <filesystem accessmode="passthrough" type="mount">
      <source dir="/containers/test1/lib64"/>
      <target dir="/lib64"/>
    </filesystem>
    <filesystem accessmode="passthrough" type="mount">
      <source dir="/containers/test1/etc"/>
      <target dir="/etc"/>
    </filesystem>
    <filesystem accessmode="passthrough" type="mount">
      <source dir="/containers/test1/lib"/>
      <target dir="/lib"/>
    </filesystem>
    <filesystem accessmode="passthrough" type="mount">
      <source dir="/containers/test1/run"/>
      <target dir="/run"/>
    </filesystem>
    <filesystem accessmode="passthrough" type="mount">
      <source dir="/containers/test1/srv"/>
      <target dir="/srv"/>
    </filesystem>
    <filesystem accessmode="passthrough" type="mount">
      <source dir="/containers/test1/sys"/>
      <target dir="/sys"/>
    </filesystem>
    <filesystem accessmode="passthrough" type="mount">
      <source dir="/containers/test1/tmp"/>
      <target dir="/tmp"/>
    </filesystem>
    <filesystem accessmode="passthrough" type="mount">
      <source dir="/containers/test1/boot"/>
      <target dir="/boot"/>
    </filesystem>
    <filesystem accessmode="passthrough" type="mount">
      <source dir="/containers/test1/usr"/>
      <target dir="/usr"/>
    </filesystem>
    <filesystem accessmode="passthrough" type="mount">
      <source dir="/containers/test1/mnt"/>
      <target dir="/mnt"/>
    </filesystem>
    <filesystem accessmode="passthrough" type="mount">
      <source dir="/containers/test1/sbin"/>
      <target dir="/sbin"/>
    </filesystem>
    <interface type="bridge">
      <source bridge="br0"/>
    </interface>
    <console port="0" type="pty"/>
  </devices>
</domain>

the host network files:
/etc/sysconfig/network-script/ifcfg-br0

DEVICE="br0"
TYPE="Bridge"
USERCTL="no"
BOOTPROTO="dhcp"
ONBOOT="yes"
NM_CONTROLLED="no"

/etc/sysconfig/network-script/ifcfg-p2p1
DEVICE="p2p1"
BOOTPROTO="dhcp"
BRIDGE="br0"
NM_CONTROLLED="no"
ONBOOT="yes"
TYPE="Ethernet"

the fstab of host
#
# /etc/fstab
# Created by anaconda on Fri Jul 26 05:26:08 2013
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
UUID=b49ce5dc-afb7-4c8e-9487-c1ed101d9166 /                       ext4
 defaults        1 1
UUID=3dfa07fd-a06b-4a1a-a3fd-4e2f5e0d0e6a /boot                   ext4
 defaults        1 2
UUID=3d1cb255-721a-48d2-b2e9-86f52b5fbec6 swap                    swap
 defaults        0 0
none /sys/fs/cgroup cgroup defaults 0 0

when i try to start the container using virsh i get error
virsh --connect lxc://

virsh # define /containers/test1/test1.xml
Domain test1 defined from /containers/test1/test1.xml

virsh # start test1
error: Failed to start domain test1
error: internal error guest failed to start: PATH=/bin:/sbin TERM=linux
container=lxc-libvirt container_uuid=05a7239d-f610-4ae9-ad47-4bf47f2f9b54
LIBVIRT_LXC_UUID=05a7239d-f610-4ae9-ad47-4bf47f2f9b54
LIBVIRT_LXC_NAME=test1 /bin/lxc_defaultinit.sh
Unable to send container continue message: Broken pipe

has anyone face the same problem with fedora 19.
can anyone guide me..

Thanks,
Aarti Sawant

Daniel P. Berrange

2013-Jul-31 09:33 UTC

head link

Re: [libvirt-users] start lxc container on fedora 19

On Wed, Jul 31, 2013 at 12:46:58PM +0530, Aarti Sawant
wrote:> hello,
> 
> i am new to lxc, i have created a lxc container on fedora 19
> i created a container rootfs of fedora 19 by using
> yum --installroot=/containers/test1 --releasever=19 install openssh
> 
> test1.xml file for container test1
> <domain type="lxc">
>   <name>test1</name>
>   <vcpu placement="static">1</vcpu>
>   <cputune>
>     <shares>1024</shares>
>     <period>1000000</period>
>   </cputune>
>   <memtune>
>     <hard_limit unit="M">1024</hard_limit>
>     <soft_limit unit="M">128</soft_limit>
>     <min_guarantee unit="M">64</min_guarantee>
>   </memtune>
>   <blkiotune>
>     <weight>800</weight>
>   </blkiotune>
>   <memory unit="KiB">102400</memory>
>   <os>
>     <type>exe</type>
>     <init>/bin/bash</init>
>   </os>
>   <clock offset="utc"/>
>   <on_poweroff>destroy</on_poweroff>
>   <on_reboot>restart</on_reboot>
>   <on_crash>destroy</on_crash>
>   <devices>
>     <emulator>/usr/libexec/libvirt_lxc</emulator>
>     <filesystem accessmode="passthrough"
type="mount">
>       <source dir="/containers/test1/"/>
>       <target dir="/"/>
>     </filesystem>
>     <filesystem accessmode="passthrough"
type="mount">
>       <source dir="/containers/test1/var"/>
>       <target dir="/var"/>
>     </filesystem>....snip more <filesystem> elements...

Why are you adding all these sub-mounts for /var, /dev, etc, etc?

You installed the entire OS tree into /containers/test1, so it
should be sufficient to just have that first <filesystem>
entry for '/'.  You'd only want to add extra mounts for
/var, etc if the directory on the host came from somewhere
outside the /containers/test1 location.

NB, also libvirt sets up /dev - you shouldn't try to
override it, or you'll loose access to the pre-populate
device nodes, which is probably what's causing your
failure.
>     <interface type="bridge">
>       <source bridge="br0"/>
>     </interface>
>     <console port="0" type="pty"/>
>   </devices>
> </domain>
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 :|

Aarti Sawant

2013-Aug-02 12:06 UTC

head link

Re: [libvirt-users] start lxc container on fedora 19

Thanks Daniel for suggestion, i have made changes in my xml script.
I am able to set up lxc container on fedora 18
i created a container using yum

yum --installroot=/containers/cont1 --releasever=18 install -y httpd
openssh, bridge-utils, dhclient

cont1.xml
<domain type="lxc">
  <name>cont1</name>
  <vcpu placement="static">1</vcpu>
  <cputune>
    <shares>1024</shares>
    <period>1000000</period>
  </cputune>
  <memtune>
    <hard_limit unit="M">256</hard_limit>
    <soft_limit unit="M">32</soft_limit>
    <min_guarantee unit="M">64</min_guarantee>
  </memtune>
  <blkiotune>
    <weight>800</weight>
  </blkiotune>
  <memory unit="KiB">102400</memory>
  <os>
    <type>exe</type>
    <init>/bin/lxc_defaultinit.sh</init>
  </os>
  <clock offset="utc"/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <devices>
    <emulator>/usr/libexec/libvirt_lxc</emulator>
    <filesystem accessmode="passthrough" type="mount">
      <source dir="/containers/cont1/"/>
      <target dir="/"/>
    </filesystem>
    <interface type="bridge">
      <source bridge="br0"/>
    </interface>
    <console port="0" type="pty"/>
  </devices>
</domain>

Network setting at host
/etc/sysconfig/network-script/ifcfg-p2p1
TYPE="Ethernet"
DEVICE="p2p1"
BOOTPROTO="dhcp"
ONBOOT="yes"
BRIDGE="br0"
NM_CONTROLLED="no"

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

Network setting at Guest
/containers/cont1/etc/sysconfig/network-script/ifcfg-eth0
TYPE="Ethernet"
DEVICE="eth0"
BOOTPROTO="static"
ONBOOT="yes"
GATEWAY=172.26.126.254
IPADDR=172.26.126.204

at host
/etc/fstab
tmpfs                   /dev/shm                tmpfs   defaults        0 0
devpts                  /dev/pts                devpts  defaults        0 0
sysfs                   /sys                    sysfs   defaults        0 0
proc                    /proc                   proc    defaults        0 0
none                   /sys/fs/cgroup           cgroup defaults       0 0

at guest
/containers/bin/lxc-defaultinit.sh
#!/bin/bash
export
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/lib
export PS1="[\u@\h \W]\$ "
export HOME="/root"
mount -t devtmpfs none /dev
mount -t devpts none /dev/pts
mount -t tmpfs none /dev/shm

mount -t sysfs none /sys
/etc/init.d/network start
exec /bin/bash



On Wed, Jul 31, 2013 at 3:03 PM, Daniel P. Berrange
<berrange@redhat.com>wrote:
> On Wed, Jul 31, 2013 at 12:46:58PM +0530, Aarti Sawant wrote:
> > hello,
> >
> > i am new to lxc, i have created a lxc container on fedora 19
> > i created a container rootfs of fedora 19 by using
> > yum --installroot=/containers/test1 --releasever=19 install openssh
> >
> > test1.xml file for container test1
> > <domain type="lxc">
> >   <name>test1</name>
> >   <vcpu placement="static">1</vcpu>
> >   <cputune>
> >     <shares>1024</shares>
> >     <period>1000000</period>
> >   </cputune>
> >   <memtune>
> >     <hard_limit unit="M">1024</hard_limit>
> >     <soft_limit unit="M">128</soft_limit>
> >     <min_guarantee unit="M">64</min_guarantee>
> >   </memtune>
> >   <blkiotune>
> >     <weight>800</weight>
> >   </blkiotune>
> >   <memory unit="KiB">102400</memory>
> >   <os>
> >     <type>exe</type>
> >     <init>/bin/bash</init>
> >   </os>
> >   <clock offset="utc"/>
> >   <on_poweroff>destroy</on_poweroff>
> >   <on_reboot>restart</on_reboot>
> >   <on_crash>destroy</on_crash>
> >   <devices>
> >     <emulator>/usr/libexec/libvirt_lxc</emulator>
> >     <filesystem accessmode="passthrough"
type="mount">
> >       <source dir="/containers/test1/"/>
> >       <target dir="/"/>
> >     </filesystem>
>
> >     <filesystem accessmode="passthrough"
type="mount">
> >       <source dir="/containers/test1/var"/>
> >       <target dir="/var"/>
> >     </filesystem>
> ....snip more <filesystem> elements...
>
> Why are you adding all these sub-mounts for /var, /dev, etc, etc?
>
> You installed the entire OS tree into /containers/test1, so it
> should be sufficient to just have that first <filesystem>
> entry for '/'.  You'd only want to add extra mounts for
> /var, etc if the directory on the host came from somewhere
> outside the /containers/test1 location.
>
> NB, also libvirt sets up /dev - you shouldn't try to
> override it, or you'll loose access to the pre-populate
> device nodes, which is probably what's causing your
> failure.
>
> >     <interface type="bridge">
> >       <source bridge="br0"/>
> >     </interface>
> >     <console port="0" type="pty"/>
> >   </devices>
> > </domain>
>
> 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:|
>

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