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Re: [virt-tools-list] Strange behaviour using qemu+ssh on virt-manager



On 09/17/2013 02:38 PM, Fernando Lozano wrote:
Hi there,

I am experimenting with different security settings for libvirtd, so I can give sysadmins administrative access to the KVM hypervisor without giving them root access on the host. I had success using TLS (with client-certs) and SASL, but have not managed to make polkit and ssh to work so far.

If I change /etc/libvirt/libvirtd.conf auth_tcp or auth_unix_rw a local virsh connection gets this error:

"Authorization requires authentication but no agent is available"

Thus  I'm using "sasl" for tcp and "none" for the unix socket.

When I try a "qemu+ssh" remote virsh connection evething works fine. But then I try the same URL using virt-manager, and then try to open a guest console, virt-manager prompts multiple times for a ssh login password.

Shoudn't virt-manager resue the same ssh connection for guest console access? And even if it needs to open a new ssh connection for the spice connection, this should require only one additional ssh login.

But I tried many times, carefully typing the password each time, and I'm sure they were not typos: virt-manager is actually asking for the ssh login password many times!

Maybe people who use ssh keys (passwordless) logins didn't notice, but I think virt-manager should't require more than one addtional ssh connection per guest console. Is this a bug?
I had the same experience using virt-manager for Fedora 19.

My workaround was to change .ssh/config file to include the following:

Host *
        ControlMaster auto
        ControlPath ~/.ssh/master-%r %h:%p

Not a fix for what I agree that seems to be a bug, but at least turned the experience feasible.

Best regards,

Leonardo Garcia


[]s, Fernando Lozano

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