[libvirt-users] Sharing network namespace between containers

[Harish Vishwanath]

Thank you. It looks like after I 'ignore', nothing is persisted in xml for
the app. Any idea what is the minimum version of libvirt required for this
feature?


Regards,
Harish

On Tue, Nov 8, 2016 at 1:36 PM, Martin Kletzander <mkletzan at redhat.com>
wrote:

> On Tue, Nov 08, 2016 at 09:01:34AM +0530, Harish Vishwanath wrote:
>
>> Hello
>>
>> Based on the lxc driver documentation, I am trying to create an xml to
>> share an existing network namespace with another container. I am running
>> libvirt 1.2.15.
>>
>> Here is the xml:
>>
>> <domain type='lxc' xmlns:lxc='http://libvirt.org/schemas/domain/lxc/1.0'>
>>
>>  <name>nt</name>
>>  <uuid>43c00192-e114-4e29-8ce7-4b5487f60a75</uuid>
>>  <memory unit='KiB'>65536</memory>
>>  <currentMemory unit='KiB'>65536</currentMemory>
>>  <vcpu placement='static'>1</vcpu>
>>  <cputune>
>>    <shares>2000</shares>
>>  </cputune>
>>  <resource>
>>    <partition>/apphosting.partition</partition>
>>  </resource>
>>  <os>
>>    <type arch='x86_64'>exe</type>
>>    <init>/sbin/init</init>
>>  </os>
>>  <clock offset='utc'/>
>>  <on_poweroff>destroy</on_poweroff>
>>  <on_reboot>restart</on_reboot>
>>  <on_crash>destroy</on_crash>
>>  <devices>
>>    <emulator>/usr/lib/libvirt/libvirt_lxc</emulator>
>>    <filesystem type='mount' accessmode='passthrough'>
>>      <source dir='/work/repo-lxc/nt/rootfs_mnt'/>
>>      <target dir='/'/>
>>    </filesystem>
>>    <filesystem type='mount' accessmode='squash'>
>>      <driver type='path' wrpolicy='immediate'/>
>>      <source dir='/local/local1/core_dir/nt'/>
>>      <target dir='/local/local1/core_dir'/>
>>    </filesystem>
>>
>> <!--
>>    <interface type='network'>
>>      <mac address='52:54:dd:6d:44:d2'/>
>>      <source network='dpbr_0'/>
>>      <guest dev='eth0'/>
>>    </interface>
>> -->
>>
>>    <console type='pty'>
>>      <target type='lxc' port='0'/>
>>    </console>
>>  </devices>
>>
>> *  <lxc:namespace>*
>> *    <lxc:sharenet type='netns' value='node'/>*
>> *  </lxc:namespace>*
>> </domain>
>>
>> However, the virsh edit is unable to save this file:
>>
>> error: XML document failed to validate against schema: Unable to validate
>> doc against /usr/share/libvirt/schemas/domain.rng
>> Element domain has extra content: namespace
>>
>> Failed. Try again? [y,n,i,f,?]:
>>
>>
> the easiest check in these situations is:
>
> 1) try whether it works when you press 'i':
>     a) it doesn't, but you get a better error message
>     b) it does continue with (2)
> 2) if (b), then check if virsh dumpxml has all the info you had there
>    (i.e. libvirt doesn't lose track of something)
>     a) no data is missing -- we have an error in our Relax-NG schema
>     b) some part of the XML is missing -- your libvirt version doesn't
>        support it
>
> Is this supported in libvirt 1.2.15 - the document doesnt specify a minimum
>> version of libvirt.
>>
>> Appreciate your help.
>>
>>
>>
>> Regards,
>> Harish
>>
>
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>>
>
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