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

22 Mar 2014


      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@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@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>