[Xen-API] The VM is crashing when it is created using Xen C API:- Please Guide how to enable crash- debug

[<devesh.chandra@xxxxxxxxx>]

I am trying to create and control the virtual machines
using the Xen C API.
The VM created is crashing with the following log.
It crashes first time and then tries to get restarted,
then again it crashes


Xen Version :-- Xen 3.3.0

Log is

[2008-12-18 12:08:24 2530] DEBUG (XendDomainInfo:240) XendDomainInfo.createDormant({'vcpus_params': {'weight': '300'}, 'PV_args': '', 'features': '', 'guest_metrics': '', 'cpus': [], 'domid': '0', 'vcpu_avail': 1, 'name_description': 'New PV VM', 'VCPUs_at_startup': 1, 'PCI_bus': '', 'VCPUs_live': 1, 'PV_bootloader': 'pygrub', 'actions_after_crash': 'restart', 'vbd_refs': [], 'PV_ramdisk': '', 'is_control_domain': False, 'name_label': 'NewPV', 'security_label': '', 'HVM_boot_params': {}, 'platform': {}, 'cpu_weight': 256, 'console_refs': [], 'power_state': 'Halted', 'cpu_cap': 0, 'on_xend_stop': 'ignore', 'memory_static_min': 134217728, 'HVM_boot_policy': '', 'VCPUs_max': 1, 'memory_static_max': 536870912, 'actions_after_shutdown': 'destroy', 'on_xend_start': 'ignore', 'metrics': '', 'memory_dynamic_max': 536870912, 'user_version': '1', 'actions_after_suspend': '', 'vtpm_refs': [], 'is_a_template': False, 'memory_dynamic_min': 134217728, 'uuid': '1444a67a-db95-44ba-a2ea-e6644aa3ff8b', 'PV_kernel': '', 'shadow_memory': 0, 'PV_bootloader_args': '', 'other_config': {}, 'auto_power_on': False, 'actions_after_reboot': 'restart', 'resident_on': '', 'vif_refs': [], 'suspend_vdi': '', 'security': None, 'devices': {}})
[2008-12-18 12:08:24 2530] DEBUG (XendDomain:737) Creating new managed domain: NewPV: 1444a67a-db95-44ba-a2ea-e6644aa3ff8b
[2008-12-18 12:08:28 2530] DEBUG (XendDomainInfo:1556) XendDomainInfo.constructDomain
[2008-12-18 12:08:28 2530] DEBUG (balloon:116) Balloon: 131072 KiB free; need 2048; done.
[2008-12-18 12:08:28 2530] DEBUG (XendDomain:443) Adding Domain: 1
[2008-12-18 12:08:28 2530] DEBUG (XendDomainInfo:1610) XendDomainInfo.initDomain: 1 256
[2008-12-18 12:08:28 7050] DEBUG (XendBootloader:100) Launching bootloader as ['/usr/bin/pygrub', '--output=/var/run/xend/boot/xenbl.12325', '/home/ANRC/xenbox1'].
[2008-12-18 12:08:35 2530] DEBUG (XendDomainInfo:1641) _initDomain:shadow_memory=0x0, memory_static_max=0x20000000, memory_static_min=0x8000000.
[2008-12-18 12:08:35 2530] DEBUG (balloon:122) Balloon: 131064 KiB free; 0 to scrub; need 524288; retries: 20.
[2008-12-18 12:08:35 2530] DEBUG (balloon:137) Balloon: setting dom0 target to 3491 MiB.
[2008-12-18 12:08:35 2530] DEBUG (XendDomainInfo:665) Setting memory target of domain Domain-0 (0) to 3491 MiB.
[2008-12-18 12:08:35 2530] DEBUG (balloon:122) Balloon: 477176 KiB free; 0 to scrub; need 524288; retries: 20.
[2008-12-18 12:08:35 2530] DEBUG (balloon:137) Balloon: setting dom0 target to 3487 MiB.
[2008-12-18 12:08:35 2530] DEBUG (XendDomainInfo:665) Setting memory target of domain Domain-0 (0) to 3487 MiB.
[2008-12-18 12:08:35 2530] DEBUG (balloon:116) Balloon: 528816 KiB free; need 524288; done.
[2008-12-18 12:08:35 2530] INFO (image:129) buildDomain os=linux dom=1 vcpus=1
[2008-12-18 12:08:35 2530] DEBUG (image:198) domid          = 1
[2008-12-18 12:08:35 2530] DEBUG (image:199) memsize        = 512
[2008-12-18 12:08:35 2530] DEBUG (image:200) image          = /var/run/xend/boot/boot_kernel.D3smb8
[2008-12-18 12:08:35 2530] DEBUG (image:201) store_evtchn   = 1
[2008-12-18 12:08:35 2530] DEBUG (image:202) console_evtchn = 2
[2008-12-18 12:08:35 2530] DEBUG (image:203) cmdline        = ro root=/dev/VolGroup00/LogVol00 rhgb quiet
[2008-12-18 12:08:35 2530] DEBUG (image:204) ramdisk        = /var/run/xend/boot/boot_ramdisk.9HMSQG
[2008-12-18 12:08:35 2530] DEBUG (image:205) vcpus          = 1
[2008-12-18 12:08:35 2530] DEBUG (image:206) features       =
[2008-12-18 12:08:36 2530] INFO (XendDomainInfo:1459) createDevice: tap : {'uuid': 'a0429bfd-024c-9cff-d112-a4eabd6c4d54', 'bootable': 1, 'driver': '', 'dev': 'xvda1:disk', 'uname': 'tap:aio:/home/ANRC/xenbox1', 'mode': 'w', 'VDI': 'dd830d44-926c-a8e3-7507-4f4e20cb7a4c', 'type': 'Disk'}
[2008-12-18 12:08:36 2530] DEBUG (DevController:117) DevController: writing {'virtual-device': '51713', 'device-type': 'disk', 'protocol': 'x86_64-abi', 'backend-id': '0', 'state': '1', 'backend': '/local/domain/0/backend/tap/1/51713'} to /local/domain/1/device/vbd/51713.
[2008-12-18 12:08:36 2530] DEBUG (DevController:119) DevController: writing {'domain': 'NewPV', 'frontend': '/local/domain/1/device/vbd/51713', 'uuid': 'a0429bfd-024c-9cff-d112-a4eabd6c4d54', 'dev': 'xvda1', 'state': '1', 'params': 'aio:/home/ANRC/xenbox1', 'mode': 'w', 'online': '1', 'frontend-id': '1', 'type': 'tap'} to /local/domain/0/backend/tap/1/51713.
[2008-12-18 12:08:36 2530] DEBUG (XendDomainInfo:2117) Storing VM details: {'on_xend_stop': 'ignore', 'shadow_memory': '0', 'uuid': '1444a67a-db95-44ba-a2ea-e6644aa3ff8b', 'on_reboot': 'restart', 'start_time': '1229582316.06', 'on_poweroff': 'destroy', 'on_xend_start': 'ignore', 'on_crash': 'restart', 'xend/restart_count': '0', 'vcpus': '1', 'vcpu_avail': '1', 'image': "(linux (kernel ) (notes (FEATURES 'writable_page_tables|writable_descriptor_tables|auto_translated_physmap|pae_pgdir_above_4gb|supervisor_mode_kernel') (VIRT_BASE 18446744071562067968) (GUEST_VERSION 2.6) (PADDR_OFFSET 18446744071562067968) (GUEST_OS linux) (HYPERCALL_PAGE 18446744071564189696) (LOADER generic) (SUSPEND_CANCEL 1) (ENTRY 18446744071564165120) (XEN_VERSION xen-3.0)))", 'name': 'NewPV'}
[2008-12-18 12:08:36 2530] DEBUG (XendDomainInfo:957) Storing domain details: {'console/ring-ref': '1260642', 'image/entry': '18446744071564165120', 'console/port': '2', 'store/ring-ref': '1260643', 'image/loader': 'generic', 'vm': '/vm/1444a67a-db95-44ba-a2ea-e6644aa3ff8b', 'control/platform-feature-multiprocessor-suspend': '1', 'image/guest-os': 'linux', 'image/features/writable-descriptor-tables': '1', 'image/virt-base': '18446744071562067968', 'memory/target': '524288', 'image/guest-version': '2.6', 'image/features/supervisor-mode-kernel': '1', 'console/limit': '1048576', 'image/paddr-offset': '18446744071562067968', 'image/hypercall-page': '18446744071564189696', 'image/suspend-cancel': '1', 'cpu/0/availability': 'online', 'image/features/pae-pgdir-above-4gb': '1', 'image/features/writable-page-tables': '1', 'image/features/auto-translated-physmap': '1', 'name': 'NewPV', 'domid': '1', 'image/xen-version': 'xen-3.0', 'store/port': '1'}
[2008-12-18 12:08:36 2530] DEBUG (DevController:117) DevController: writing {'protocol': 'x86_64-abi', 'state': '1', 'backend-id': '0', 'backend': '/local/domain/0/backend/console/1/0'} to /local/domain/1/device/console/0.
[2008-12-18 12:08:36 2530] DEBUG (DevController:119) DevController: writing {'domain': 'NewPV', 'protocol': 'vt100', 'uuid': 'ad563f77-92b7-3a40-4517-903b3fc7f54a', 'frontend': '/local/domain/1/device/console/0', 'state': '1', 'location': '2', 'online': '1', 'frontend-id': '1'} to /local/domain/0/backend/console/1/0.
[2008-12-18 12:08:36 2530] DEBUG (XendDomainInfo:1041) XendDomainInfo.handleShutdownWatch
[2008-12-18 12:08:36 2530] DEBUG (DevController:150) Waiting for devices vif.
[2008-12-18 12:08:36 2530] DEBUG (DevController:150) Waiting for devices usb.
[2008-12-18 12:08:36 2530] DEBUG (DevController:150) Waiting for devices vbd.
[2008-12-18 12:08:36 2530] DEBUG (DevController:150) Waiting for devices irq.
[2008-12-18 12:08:36 2530] DEBUG (DevController:150) Waiting for devices vkbd.
[2008-12-18 12:08:36 2530] DEBUG (DevController:150) Waiting for devices vfb.
[2008-12-18 12:08:36 2530] DEBUG (DevController:150) Waiting for devices console.
[2008-12-18 12:08:36 2530] DEBUG (DevController:155) Waiting for 0.
[2008-12-18 12:08:36 2530] DEBUG (DevController:150) Waiting for devices pci.
[2008-12-18 12:08:36 2530] DEBUG (DevController:150) Waiting for devices ioports.
[2008-12-18 12:08:36 2530] DEBUG (DevController:150) Waiting for devices tap.
[2008-12-18 12:08:36 2530] DEBUG (DevController:155) Waiting for 51713.
[2008-12-18 12:08:36 2530] DEBUG (DevController:594) hotplugStatusCallback /local/domain/0/backend/tap/1/51713/hotplug-status.
[2008-12-18 12:08:36 2530] DEBUG (DevController:594) hotplugStatusCallback /local/domain/0/backend/tap/1/51713/hotplug-status.
[2008-12-18 12:08:36 2530] DEBUG (DevController:608) hotplugStatusCallback 1.
[2008-12-18 12:08:36 2530] DEBUG (DevController:150) Waiting for devices vtpm.
[2008-12-18 12:08:36 2530] WARNING (XendDomainInfo:1204) Domain has crashed: name=NewPV id=1.
[2008-12-18 12:08:36 2530] DEBUG (XendDomainInfo:1822) XendDomainInfo.destroyDomain(1)
[2008-12-18 12:08:36 2530] DEBUG (XendDomainInfo:1480) Removing vbd/51713
[2008-12-18 12:08:36 2530] DEBUG (XendDomainInfo:570) XendDomainInfo.destroyDevice: deviceClass = vbd, device = vbd/51713
[2008-12-18 12:08:36 2530] DEBUG (XendDomainInfo:1480) Removing console/0
[2008-12-18 12:08:36 2530] DEBUG (XendDomainInfo:570) XendDomainInfo.destroyDevice: deviceClass = console, device = console/0
[2008-12-18 12:08:36 2530] DEBUG (XendDomainInfo:107) XendDomainInfo.create_from_dict({'vcpus_params': {'weight': '300'}, 'PV_args': '', 'other_config': {}, 'PV_bootloader': 'pygrub', 'guest_metrics': '', 'cpus': [], 'paused': 0, 'domid': 1, 'shutdown': 0, 'name_description': 'New PV VM', 'VCPUs_at_startup': 1, 'PCI_bus': '', 'VCPUs_live': 1, 'features': '', 'actions_after_crash': 'restart', '_temp_args': 'ro root=/dev/VolGroup00/LogVol00 rhgb quiet', 'PV_ramdisk': '', 'is_control_domain': False, '_temp_ramdisk': '/var/run/xend/boot/boot_ramdisk.9HMSQG', 'name_label': 'NewPV', 'security_label': '', 'HVM_boot_params': {}, 'platform': {}, 'cpu_weight': 256, 'console_refs': ['ad563f77-92b7-3a40-4517-903b3fc7f54a'], 'power_state': 'Halted', 'online_vcpus': 1, 'cpu_cap': 0, 'vif_refs': [], 'blocked': 0, 'on_xend_stop': 'ignore', 'memory_static_min': 134217728, 'HVM_boot_policy': '', 'shutdown_reason': 3, 'VCPUs_max': 1, 'start_time': 1229582316.0605459, 'memory_static_max': 536870912, 'actions_after_shutdown': 'destroy', 'on_xend_start': 'ignore', 'metrics': '', 'crashed': 1, 'memory_dynamic_max': 536870912, 'user_version': '1', 'actions_after_suspend': '', 'vtpm_refs': [], 'is_a_template': False, 'PV_bootloader_args': '', 'memory_dynamic_min': 134217728, 'vbd_refs': ['a0429bfd-024c-9cff-d112-a4eabd6c4d54'], 'PV_kernel': '', 'cpu_time': 0.149639946, 'shadow_memory': 0, 'dying': 1, 'vcpu_avail': 1, 'notes': {'FEATURES': 'writable_page_tables|writable_descriptor_tables|auto_translated_physmap|pae_pgdir_above_4gb|supervisor_mode_kernel', 'VIRT_BASE': 18446744071562067968L, 'GUEST_VERSION': '2.6', 'PADDR_OFFSET': 18446744071562067968L, 'GUEST_OS': 'linux', 'HYPERCALL_PAGE': 18446744071564189696L, 'LOADER': 'generic', 'SUSPEND_CANCEL': 1, 'ENTRY': 18446744071564165120L, 'XEN_VERSION': 'xen-3.0'}, '_temp_kernel': '/var/run/xend/boot/boot_kernel.D3smb8', 'auto_power_on': False, 'uuid': '1444a67a-db95-44ba-a2ea-e6644aa3ff8b', 'actions_after_reboot': 'restart', 'resident_on': '', '_temp_using_bootloader': '1', 'running': 0, 'suspend_vdi': '', 'security': None, 'devices': {'ad563f77-92b7-3a40-4517-903b3fc7f54a': ('console', {'other_config': {}, 'protocol': 'vt100', 'uuid': 'ad563f77-92b7-3a40-4517-903b3fc7f54a', 'location': '2'}), 'a0429bfd-024c-9cff-d112-a4eabd6c4d54': ('tap', {'uuid': 'a0429bfd-024c-9cff-d112-a4eabd6c4d54', 'bootable': 1, 'devid': 51713, 'driver': '', 'dev': 'xvda1:disk', 'uname': 'tap:aio:/home/ANRC/xenbox1', 'mode': 'w', 'VDI': 'dd830d44-926c-a8e3-7507-4f4e20cb7a4c', 'type': 'Disk'})}})
[2008-12-18 12:08:36 2530] DEBUG (XendDomainInfo:1556) XendDomainInfo.constructDomain
[2008-12-18 12:08:36 2530] DEBUG (balloon:116) Balloon: 22352 KiB free; need 2048; done.
[2008-12-18 12:08:36 2530] DEBUG (XendDomain:443) Adding Domain: 2
[2008-12-18 12:08:36 2530] DEBUG (XendDomainInfo:1610) XendDomainInfo.initDomain: 2 256
[2008-12-18 12:08:36 7111] DEBUG (XendBootloader:100) Launching bootloader as ['/usr/bin/pygrub', '--output=/var/run/xend/boot/xenbl.11015', '/home/ANRC/xenbox1'].
[2008-12-18 12:08:42 2530] DEBUG (XendDomainInfo:1641) _initDomain:shadow_memory=0x0, memory_static_max=0x20000000, memory_static_min=0x8000000.
[2008-12-18 12:08:42 2530] DEBUG (balloon:116) Balloon: 528816 KiB free; need 524288; done.
[2008-12-18 12:08:42 2530] INFO (image:129) buildDomain os=linux dom=2 vcpus=1
[2008-12-18 12:08:42 2530] DEBUG (image:198) domid          = 2
[2008-12-18 12:08:42 2530] DEBUG (image:199) memsize        = 512
[2008-12-18 12:08:42 2530] DEBUG (image:200) image          = /var/run/xend/boot/boot_kernel.GvJFRB
[2008-12-18 12:08:42 2530] DEBUG (image:201) store_evtchn   = 1
[2008-12-18 12:08:42 2530] DEBUG (image:202) console_evtchn = 2
[2008-12-18 12:08:42 2530] DEBUG (image:203) cmdline        = ro root=/dev/VolGroup00/LogVol00 rhgb quiet
[2008-12-18 12:08:42 2530] DEBUG (image:204) ramdisk        = /var/run/xend/boot/boot_ramdisk.nouC3_
[2008-12-18 12:08:42 2530] DEBUG (image:205) vcpus          = 1
[2008-12-18 12:08:42 2530] DEBUG (image:206) features       =
[2008-12-18 12:08:42 2530] INFO (XendDomainInfo:1459) createDevice: console : {'other_config': {}, 'protocol': 'vt100', 'uuid': 'ad563f77-92b7-3a40-4517-903b3fc7f54a', 'location': '2'}
[2008-12-18 12:08:42 2530] DEBUG (DevController:117) DevController: writing {'protocol': 'x86_64-abi', 'state': '1', 'backend-id': '0', 'backend': '/local/domain/0/backend/console/2/0'} to /local/domain/2/device/console/0.
[2008-12-18 12:08:42 2530] DEBUG (DevController:119) DevController: writing {'domain': 'NewPV', 'protocol': 'vt100', 'uuid': 'ad563f77-92b7-3a40-4517-903b3fc7f54a', 'frontend': '/local/domain/2/device/console/0', 'state': '1', 'location': '2', 'online': '1', 'frontend-id': '2'} to /local/domain/0/backend/console/2/0.
[2008-12-18 12:08:42 2530] INFO (XendDomainInfo:1459) createDevice: tap : {'uuid': 'a0429bfd-024c-9cff-d112-a4eabd6c4d54', 'bootable': 1, 'devid': 51713, 'driver': '', 'dev': 'xvda1:disk', 'uname': 'tap:aio:/home/ANRC/xenbox1', 'mode': 'w', 'VDI': 'dd830d44-926c-a8e3-7507-4f4e20cb7a4c', 'type': 'Disk'}
[2008-12-18 12:08:42 2530] DEBUG (DevController:117) DevController: writing {'virtual-device': '51713', 'device-type': 'disk', 'protocol': 'x86_64-abi', 'backend-id': '0', 'state': '1', 'backend': '/local/domain/0/backend/tap/2/51713'} to /local/domain/2/device/vbd/51713.
[2008-12-18 12:08:42 2530] DEBUG (DevController:119) DevController: writing {'domain': 'NewPV', 'frontend': '/local/domain/2/device/vbd/51713', 'uuid': 'a0429bfd-024c-9cff-d112-a4eabd6c4d54', 'dev': 'xvda1', 'state': '1', 'params': 'aio:/home/ANRC/xenbox1', 'mode': 'w', 'online': '1', 'frontend-id': '2', 'type': 'tap'} to /local/domain/0/backend/tap/2/51713.
[2008-12-18 12:08:42 2530] DEBUG (XendDomainInfo:2117) Storing VM details: {'on_xend_stop': 'ignore', 'shadow_memory': '0', 'uuid': '1444a67a-db95-44ba-a2ea-e6644aa3ff8b', 'on_reboot': 'restart', 'start_time': '1229582322.35', 'on_poweroff': 'destroy', 'on_xend_start': 'ignore', 'on_crash': 'restart', 'vcpus': '1', 'vcpu_avail': '1', 'image': "(linux (kernel ) (notes (FEATURES 'writable_page_tables|writable_descriptor_tables|auto_translated_physmap|pae_pgdir_above_4gb|supervisor_mode_kernel') (VIRT_BASE 18446744071562067968) (GUEST_VERSION 2.6) (PADDR_OFFSET 18446744071562067968) (GUEST_OS linux) (HYPERCALL_PAGE 18446744071564189696) (LOADER generic) (SUSPEND_CANCEL 1) (ENTRY 18446744071564165120) (XEN_VERSION xen-3.0)))", 'name': 'NewPV'}
[2008-12-18 12:08:42 2530] DEBUG (XendDomainInfo:957) Storing domain details: {'console/ring-ref': '1260642', 'image/entry': '18446744071564165120', 'console/port': '2', 'store/ring-ref': '1260643', 'image/loader': 'generic', 'vm': '/vm/1444a67a-db95-44ba-a2ea-e6644aa3ff8b', 'control/platform-feature-multiprocessor-suspend': '1', 'image/guest-os': 'linux', 'image/features/writable-descriptor-tables': '1', 'image/virt-base': '18446744071562067968', 'memory/target': '524288', 'image/guest-version': '2.6', 'image/features/supervisor-mode-kernel': '1', 'console/limit': '1048576', 'image/paddr-offset': '18446744071562067968', 'image/hypercall-page': '18446744071564189696', 'image/suspend-cancel': '1', 'cpu/0/availability': 'online', 'image/features/pae-pgdir-above-4gb': '1', 'image/features/writable-page-tables': '1', 'image/features/auto-translated-physmap': '1', 'name': 'NewPV', 'domid': '2', 'image/xen-version': 'xen-3.0', 'store/port': '1'}
[2008-12-18 12:08:42 2530] DEBUG (XendDomainInfo:1041) XendDomainInfo.handleShutdownWatch
[2008-12-18 12:08:42 2530] WARNING (XendDomainInfo:1204) Domain has crashed: name=NewPV id=2.
[2008-12-18 12:08:42 2530] ERROR (XendDomainInfo:1334) VM NewPV restarting too fast (6.113505 seconds since the last restart).  Refusing to restart to avoid loops.
[2008-12-18 12:08:42 2530] DEBUG (XendDomainInfo:1803) XendDomainInfo.destroy: domid=2
[2008-12-18 12:08:42 2530] DEBUG (XendDomainInfo:1822) XendDomainInfo.destroyDomain(2)
[2008-12-18 12:08:42 2530] DEBUG (XendDomainInfo:1480) Removing vbd/51713
[2008-12-18 12:08:42 2530] DEBUG (XendDomainInfo:570) XendDomainInfo.destroyDevice: deviceClass = vbd, device = vbd/51713
[2008-12-18 12:08:42 2530] DEBUG (XendDomainInfo:1480) Removing console/0
[2008-12-18 12:08:42 2530] DEBUG (XendDomainInfo:570) XendDomainInfo.destroyDevice: deviceClass = console, device = console/0



Thanks and Regards,
Devesh Chandra,
Project Engineer,
Aerospace Network Research Consortium,
Wipro Technologies | www.wipro.com
Bangalore
Mobile :- +919243072145
email to :- devesh.chandra@xxxxxxxxx

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