Hi Simon and all,
The problem has be solved.
Libvirt process on host fails to start, so Frontend can't monitor host.
I checked the log file of /var/log/libvirt/libvirtd.log, and it shows that

于 2012年11月19日 21:40, Simon Boulet 写道:
Hi Jeff,

On Sun, Nov 18, 2012 at 10:58 PM, 任英杰 <[email protected] <mailto:[email protected]>> wrote:

    hi Simon,
    I also re-make the directory /var/lock/one, and set the
    ownership/group to oneadmin:cloud.
    It works, and I can start one daemon.
    But command onehost shows that some hosts are in error status.
    I enable them ,but Frontend still can't monitor hosts.


Look at the Host template (using: onehost show host-id) , it should have an ERROR entry that shows why the monitoring failed. Perhaps oneadmin can't SSH to the hosts for some reasons?

Simon

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