[libvirt-users] Issues to manage RAM on openvz guests

[Aurelien Martin]

I forgot give you versions ...

Debian Wheezy 7.4 Stable
# virsh -v
0.9.12.3
# uname -a
Linux prx30 2.6.32-openvz-amd64 #1 SMP Mon Feb 17 20:46:37 MSK 2014 x86_64
GNU/Linux


2014-03-22 18:38 GMT+01:00 Aurelien Martin <01aurelien at gmail.com>:

> Hi all,
>
> I'm playing with virsh, and I succeed to mange easily some KVM nodes.
>
> But I have issues to size RAM of openvz guests.
> virsh set by default the the memory to 256M on each guest instead of that
> I specify in the XML
>
> I have to modify by end the variable PHYSPAGES on each
> /etc/vz/conf/id_of_my_vz.conf
>
> Please follow the XML dump and the steps that I did.
>
> Cheers,Aurelien
>
> Log
> ----
>
> 1) Define openvz guest domain 103
>
>     #virsh -c openvz:///system define vztest.xml
>     Domain 103 defined from vztest.xml
>
> 2) Start the guest
>     #virsh -c openvz:///system start 103
>     Domain 103 started
>
>     #vzlist
>           CTID      NPROC STATUS    IP_ADDR         HOSTNAME
>            103         20 running   -               -
>
> 3) Check memory size vz guest 103
>
> #vzctl enter 103
> entered into CT 103
> #root at test:/# free -m
>              total       used       free     shared    buffers     cached
> Mem:           256         27        228          0          0         14
> -/+ buffers/cache:         13        242
> Swap:          512          0        512
>
>
> vztest.xml
> -----------
> <domain type='openvz'>
>   <name>100</name>
>   <uuid>86c12009-e591-a159-6e9f-91d18b85ef78</uuid>
>   <memory unit='GiB'>1</memory>
>   <currentMemory unit='GiB'>1</currentMemory>
>   <vcpu placement='static'>1</vcpu>
>   <os>
>     <type>exe</type>
>     <init>/sbin/init</init>
>   </os>
>   <devices>
>     <filesystem type='template' accessmode='passthrough'>
>       <source name='debian-7.0-x86_64'/>
>       <target dir='/'/>
>     </filesystem>
>     <interface type='bridge'>
>       <mac address='00:16:3e:1a:66:67'/>
>       <source bridge='br0'/>
>       <target dev='veth3'/>
>     </interface>
>   </devices>
> </domain>
>
> xmldump
> --------
>
> <domain type='openvz' id='103'>
>   <name>103</name>
>   <uuid>86c52009-e541-a159-6e9f-91d18b85ef79</uuid>
>   <memory unit='KiB'>0</memory>
>   <currentMemory unit='KiB'>0</currentMemory>
>   <vcpu placement='static'>1</vcpu>
>   <os>
>     <type>exe</type>
>     <init>/sbin/init</init>
>   </os>
>   <clock offset='utc'/>
>   <on_poweroff>destroy</on_poweroff>
>   <on_reboot>destroy</on_reboot>
>   <on_crash>destroy</on_crash>
>   <devices>
>     <filesystem type='template' accessmode='passthrough'>
>       <source name='debian-7.0-x86_64'/>
>       <target dir='/'/>
>     </filesystem>
>     <interface type='bridge'>
>       <mac address='00:16:3e:1a:66:67'/>
>       <source bridge='br0'/>
>       <target dev='veth3'/>
>     </interface>
>   </devices>
> </domain>
>
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