Created attachment 446663 [details]
Initial patch for --use-sudo for fence_virsh
Description of problem:
fence_virsh logs in on the host (bare metal) running the guest (virtual) and executes 'virsh <action> <guest>'. It is required that the system that executed the fencing, can log in as a user with the privileges to run 'virsh'. Allowing 'virsh' to work correctly, requires on standard installations 'root' privileges.
However it may not always be acceptable that a virtual machine executing fence-operations can gain 'root' access on the physical host. Separating privileges with 'sudo' is easy to setup, but requires fence_virsh to be able to execute 'sudo virsh ...' instead of the plain 'virsh ...'.
The attached patch implements a --use-sudo (or -U) option in fencing.py and uses this option in fence_virsh.
A simple /etc/sudoers.d/fence_virsh allows any user in the 'virtadmin' group to execute (any) virsh commands. It would be possible to fine-tune this on user basis and only allow some users fence some virtual-machines.
Example of /etc/sudoers.d/fence_virsh:
# configuration to allow the group virtadmin execute virsh commands
%virtadmin ALL = NOPASSWD : /usr/bin/virsh
Please consider this patch (or similar) for inclusion (an email to firstname.lastname@example.org was sent yesterday, but is not in the archives yet...).
sorry that it took so long. Patch based on your proposion is in upstream now and it will be part of next minor version.
This bug appears to have been reported against 'rawhide' during the Fedora 19 development cycle.
Changing version to '19'.
(As we did not run this process for some time, it could affect also pre-Fedora 19 development
cycle bugs. We are very sorry. It will help us with cleanup during Fedora 19 End Of Life. Thank you.)
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