How to enable VNC console with kvm hypervisor and ganeti-instance-image install

[Matt Gumbel]

Hello,

I create an instance using ganeti-instance-image OS and start it up with my ISO of choice. Problem is there is no VNC console...only serial console. I can see the arguments passed to the kvm hypervisor do not include -vnc in the process listing.

Is there something special I need to do to get a vnc console?

thanks,

Matt

Intel opensource technology center

Instance name: oag04

UUID: 927c72ea-521b-449c-a896-04e9934f155a

Serial number: 2

Creation time: 2011-07-11 16:09:23

Modification time: 2011-07-11 16:10:06

State: configured to be up, actual state is up

  Nodes:

    - primary: yyy

    - secondaries:

  Operating system: image+default

  Allocated network port: 11006

  Hypervisor: kvm

    - acpi: default (True)

    - boot_order: default (disk)

    - cdrom2_image_path: default ()

    - cdrom_disk_type: default ()

    - cdrom_image_path: default ()

    - disk_cache: default (default)

    - disk_type: default (paravirtual)

    - floppy_image_path: default ()

    - initrd_path: default ()

    - kernel_args: default (ro)

    - kernel_path:

    - kvm_flag: default ()

    - mem_path: default ()

    - migration_downtime: default (30)

    - nic_type: default (paravirtual)

    - root_path: default (/dev/vda1)

    - security_domain: default ()

    - security_model: default (none)

    - serial_console: default (True)

    - usb_mouse: default ()

    - use_chroot: default (False)

    - use_localtime: default (False)

    - vhost_net: default (False)

    - vnc_bind_address: default ()

    - vnc_password_file: default ()

    - vnc_tls: default (False)

    - vnc_x509_path: default ()

    - vnc_x509_verify: default (False)

  Hardware:

    - VCPUs: 23

    - memory: 61440MiB

    - NICs:

      - nic/0: MAC: aa:00:00:eb:b1:88, IP: 10.23.219.46, mode: bridged, link: br0

  Disk template: plain

  Disks:

    - disk/0: lvm, size 650.0G

      access mode: rw

      logical_id:  xenvg/c7d6c9e2-24d8-4336-8a6b-939dce5f8037.disk0

      on primary:  /dev/xenvg/c7d6c9e2-24d8-4336-8a6b-939dce5f8037.disk0 (253:0)

[Iustin Pop]

On Mon, Jul 11, 2011 at 10:13:32PM -0700, Matt Gumbel wrote:
> Hello,
>
> I create an instance using ganeti-instance-image OS and start it up with my
> ISO of choice. Problem is there is no VNC console...only serial console. I
> can see the arguments passed to the kvm hypervisor do not include -vnc in
> the process listing.
>
> Is there something special I need to do to get a vnc console?

Disabling the serial console should be all that is needed, I think.

regards,
iustin

[Meik Sievertsen]

Hello Matt,

On 12.07.2011 07:13, Matt Gumbel wrote:
> Hello,
>
> I create an instance using ganeti-instance-image OS and start it up with
> my ISO of choice. Problem is there is no VNC console...only serial
> console. I can see the arguments passed to the kvm hypervisor do not
> include -vnc in the process listing.
>
> Is there something special I need to do to get a vnc console?
>

You may want to change the vnc_bind_address of your instance (and maybe
adjust it cluster wide).

You can do this with the following command:
gnt-instance modify -H vnc_bind_address=0.0.0.0 oag04

Replace 0.0.0.0 with your hostname if you do not want to access from
external.

The allocated network port is the VNC port you connect to, for your
instance ::11006

If you want to change the vnc_bind_address for all new instances you can
change it cluster-wide:
gnt-cluster modify -H kvm:vnc_bind_address=0.0.0.0

Cheers,
Meik

> [...]

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Ust-IdNr.: DE 207 624 889

[Matt Gumbel]

Tried that, but no luck (see gnt-instance info below). Is it possible VNC doesn't work with the kvm hypervisor?

Instance name: xxx

UUID: 7d216f5d-c7e3-46f5-960d-dc33118ad5f2

Serial number: 2

State: configured to be up, actual state is up

  Nodes:

    - primary: xxx

    - secondaries:

  Operating system: image+default

  Allocated network port: 11007

  Hypervisor: kvm

[...]

    - serial_console: False

[Iustin Pop]

On Tue, Jul 12, 2011 at 08:37:05PM -0700, Matt Gumbel wrote:
> On Tuesday, July 12, 2011 1:17:50 AM UTC-7, Iustin Pop wrote:
> >
> > On Mon, Jul 11, 2011 at 10:13:32PM -0700, Matt Gumbel wrote:
> > > Is there something special I need to do to get a vnc console?
> >
> > Disabling the serial console should be all that is needed, I think.
> >
>
> Tried that, but no luck (see gnt-instance info below). Is it possible VNC
> doesn't work with the kvm hypervisor?

Nope. As said in the other reply, you need to set the vnc_bind_address
to a valid ipv4 or ipv6 value.

regards,
iustin

[Matt Gumbel]

It worked, thank you very much.