[Xen-users] unable to create additional virtual machines

[Ethan Furman <ethan@xxxxxxxxxxxx>]

Greetings,

I currently have Xen 4.4.1 running on Ubuntu 14.04.2.

When I first installed it I was able to get two virtual machines up and 
running (this was a couple months ago).  Now when trying to create more 
virtual machines I keep getting this message:
> root@fractal:/home/ethan# xl create /etc/xen/falcon.cfg -c
> Parsing config from /etc/xen/falcon.cfg
> xenconsole: Could not read tty from store: No such file or directory
> libxl: error: libxl_exec.c:118:libxl_report_child_exitstatus: console child [0] 
> exited with error status 2
a `ps ax` shows:

>  3477 ?        RLsl   0:03 /usr/lib/xen-4.4/bin/xl create /etc/xen/falcon.cfg -c
>  3947 ?        S      0:00 /lib/systemd/systemd-udevd --daemon
>  3994 ?        S      0:00 /lib/systemd/systemd-udevd --daemon
>  3995 ?        S      0:00 /lib/systemd/systemd-udevd --daemon
>  3997 ?        S      0:00 /lib/systemd/systemd-udevd --daemon
>  3999 ?        S      0:00 /lib/systemd/systemd-udevd --daemon
>  4000 ?        S      0:00 /lib/systemd/systemd-udevd --daemon
>  4001 ?        S      0:00 /lib/systemd/systemd-udevd --daemon
>  4002 ?        S      0:00 /lib/systemd/systemd-udevd --daemon
>  4003 ?        S      0:00 /lib/systemd/systemd-udevd --daemon
>  4004 ?        S      0:00 /lib/systemd/systemd-udevd --daemon
>  4005 ?        S      0:00 /lib/systemd/systemd-udevd --daemon
>  4006 ?        S      0:00 /lib/systemd/systemd-udevd --daemon
>  4008 ?        S      0:00 /lib/systemd/systemd-udevd --daemon
>  4010 ?        S      0:00 /lib/systemd/systemd-udevd --daemon
>  4011 ?        S      0:00 /lib/systemd/systemd-udevd --daemon
>  4012 ?        S      0:00 /lib/systemd/systemd-udevd --daemon
>  4076 ?        S      0:00 /lib/systemd/systemd-udevd --daemon
>  4077 ?        S      0:00 /lib/systemd/systemd-udevd --daemon
In the syslog:

> May 13 15:13:31 fractal ethan: /etc/xen/scripts/block: add 
> XENBUS_PATH=backend/vbd/3/51712
> May 13 15:13:31 fractal ethan: /etc/xen/scripts/vif-bridge: online type_if=vif 
> XENBUS_PATH=backend/vif/3/0
> May 13 15:13:31 fractal kernel: [  337.298513] device vif3.0 entered 
> promiscuous mode
> May 13 15:13:31 fractal kernel: [  337.304120] IPv6: ADDRCONF(NETDEV_UP): 
> vif3.0: link is not ready
> May 13 15:13:31 fractal ethan: /etc/xen/scripts/vif-bridge: Successful 
> vif-bridge online for vif3.0, bridge xenbr0.
> May 13 15:13:31 fractal ethan: /etc/xen/scripts/vif-bridge: Writing 
> backend/vif/3/0/hotplug-status connected to xenstore.
> May 13 15:13:32 fractal kernel: [  338.065016] xenbr0: port 4(vif3.0) entered 
> disabled state
> May 13 15:13:32 fractal kernel: [  338.065127] device vif3.0 left promiscuous 
> mode
> May 13 15:13:32 fractal kernel: [  338.065136] xenbr0: port 4(vif3.0) entered 
> disabled state
> May 13 15:13:32 fractal ethan: /etc/xen/scripts/block: remove 
> XENBUS_PATH=backend/vbd/3/51712
> May 13 15:13:32 fractal ethan: /etc/xen/scripts/vif-bridge: offline type_if=vif 
> XENBUS_PATH=backend/vif/3/0
> May 13 15:13:32 fractal ethan: /etc/xen/scripts/vif-bridge: brctl delif xenbr0 
> vif3.0 failed
> May 13 15:13:32 fractal ethan: /etc/xen/scripts/vif-bridge: ifconfig vif3.0 
> down failed
> May 13 15:13:32 fractal ethan: /etc/xen/scripts/vif-bridge: Successful 
> vif-bridge offline for vif3.0, bridge xenbr0.
> May 13 15:13:35 fractal ethan: /etc/xen/scripts/block: add 
> XENBUS_PATH=backend/vbd/4/51712
> May 13 15:13:35 fractal ethan: /etc/xen/scripts/vif-bridge: online type_if=vif 
> XENBUS_PATH=backend/vif/4/0
> May 13 15:13:35 fractal kernel: [  341.458396] device vif4.0 entered 
> promiscuous mode
> May 13 15:13:35 fractal kernel: [  341.462427] IPv6: ADDRCONF(NETDEV_UP): 
> vif4.0: link is not ready
> May 13 15:13:35 fractal ethan: /etc/xen/scripts/vif-bridge: Successful 
> vif-bridge online for vif4.0, bridge xenbr0.
> May 13 15:13:35 fractal ethan: /etc/xen/scripts/vif-bridge: Writing 
> backend/vif/4/0/hotplug-status connected to xenstore.
> May 13 15:13:36 fractal kernel: [  342.222556] xenbr0: port 4(vif4.0) entered 
> disabled state
> May 13 15:13:36 fractal kernel: [  342.222707] device vif4.0 left promiscuous 
> mode
> May 13 15:13:36 fractal kernel: [  342.222719] xenbr0: port 4(vif4.0) entered 
> disabled state
> May 13 15:13:36 fractal ethan: /etc/xen/scripts/block: remove 
> XENBUS_PATH=backend/vbd/4/51712
> May 13 15:13:36 fractal ethan: /etc/xen/scripts/vif-bridge: offline type_if=vif 
> XENBUS_PATH=backend/vif/4/0
> May 13 15:13:36 fractal ethan: /etc/xen/scripts/vif-bridge: brctl delif xenbr0 
> vif4.0 failed
> May 13 15:13:36 fractal ethan: /etc/xen/scripts/vif-bridge: ifconfig vif4.0 
> down failed
> May 13 15:13:36 fractal ethan: /etc/xen/scripts/vif-bridge: Successful 
> vif-bridge offline for vif4.0, bridge xenbr0.
> May 13 15:13:39 fractal ethan: /etc/xen/scripts/block: add 
> XENBUS_PATH=backend/vbd/5/51712
> May 13 15:13:40 fractal ethan: /etc/xen/scripts/vif-bridge: online type_if=vif 
> XENBUS_PATH=backend/vif/5/0
and this just keeps cycling until I kill the `xl create` job.

The falcon.cfg file looks like:

> name = 'falcon'
>
> kernel = '/distros/ubuntu/i386/precise/vmlinuz'
> ramdisk = '/distros/ubuntu/i386/precise/initrd.gz'
> extra = 'debian-installer/exit/always_halt=true-- console=hvc0'
>
> memory = 1024
> maxmem = 1024
>
> vcpus = 1
> maxvcpus = 1
>
> vif = ['']
>
> disk = ['phy:/dev/xen-disks/falcon_openerp,xvda,w']
>
> on_poweroff = 'destroy'
> on_reboot = 'restart'
> on_crash = 'restart'
Any ideas what I have done wrong?

--
~Ethan~

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