[one-users] retrieve info from OpenVZ host running libvirtd

[Carlos Martín Sánchez]

Hi Nikolay,

Could you paste the output of
    ssh <OVZ_cluster_node> "/var/tmp/one/im/run_probes ovz"
?

Change /var/tmp/one to your SCRIPTS_REMOTE_DIR if you changed it in your
oned.conf file.

Regards,
Carlos.

--
Carlos Martín, MSc
Project Major Contributor
OpenNebula - The Open Source Toolkit for Cloud Computing
www.OpenNebula.org <http://www.opennebula.org/> | cmartin at opennebula.org


On 18 February 2011 17:27, <knawnd at gmail.com> wrote:

> Dear all,
>
> Trying to implement IM driver for OpenVZ cluster nodes I faced with the
> following problem:
>
> $ onehost list
>  ID NAME                           CLUSTER  RVM   TCPU   FCPU   ACPU   TMEM
>    FMEM STAT
>   2 <cluster_node1>         xen_x64           0       200      200     200
>       3.1G     128M    on
>   3 <cluster_node2>         ovz_x32           0            0  0       100
>         0K          0K     err
>
> oned.log:
> [...]
> Fri Feb 18 18:54:47 2011 [InM][D]: Host 3 successfully monitored.
> Fri Feb 18 18:54:47 2011 [ONE][E]: syntax error, unexpected $end, expecting
> VARIABLE at line 2, columns 1:2
> Fri Feb 18 18:54:47 2011 [InM][E]: Error parsing host information:
> [...]
>
> I added oneadmin user into /etc/sudoers file and commented out the line
> "Defaults    requiretty":
> $ egrep "oneadmin|requiretty" /etc/sudoers
> #Defaults    requiretty
> oneadmin        ALL=(ALL)       NOPASSWD: ALL
>
> (I couldn't figure out more secure and elegant way to get info from OpenVZ
> host having libvirt interface installed. Any suggestions on that?)
>
> and did the following changes in ovz.rb file:
> $ diff /usr/lib/one/remotes/im/ovz.d/ovz.rb
> /usr/lib/one/remotes/im/kvm.d/kvm.rb
> 29c29
> < nodeinfo_text = `sudo virsh -c openvz:///system nodeinfo`
> ---
> > nodeinfo_text = `virsh -c qemu:///system nodeinfo`
> 90c90
> < print_info("HYPERVISOR","ovz")
> ---
> > print_info("HYPERVISOR","kvm")
>
> "sudo virsh -c openvz:///system nodeinfo" running under oneadmin user from
> front-end node gives the following output:
> [oneadmin@<ONE_front-end>$ ssh <OVZ_cluster_node> sudo virsh -c
> openvz:///system nodeinfo
> CPU model:           i686
> CPU(s):              1
> CPU frequency:       2793 MHz
> CPU socket(s):       1
> Core(s) per socket:  1
> Thread(s) per core:  1
> NUMA cell(s):        1
> Memory size:         2056216 kB
>
> I was hoping to apply the same solution as written in "KVM Driver Guide
> 2.0" (http://opennebula.org/documentation:rel2.0:kvmg) since ONE uses the
> libvirt interface as well to interact with KVM hosts:
> ...The following steps are required in the cluster nodes to get the KVM
> driver running:
> [...]
>    *      The user with access to these remotes hosts on behalf of
> OpenNebula (typically <oneadmin>) has to pertain to the <libvirtd> and <kvm>
> groups in order to use the deaemon and be able to launch VMs.
>
> but I can't following that way since there is no libvirt group and libvirtd
> is run under root (I had to build libvirt from tarball available at its home
> page since CentOS has a pretty old one in its repos without openvz support).
>
> Any help on that is highly appreciated!
> Nikolay.
> _______________________________________________
> Users mailing list
> Users at lists.opennebula.org
> http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
>
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