Re: [openstack-dev] [nova] [libvirt] The risk of hanging when shutdown instance.
Thank you for reply, Chris. 2015-03-27 23:15 GMT+08:00 Chris Friesen chris.frie...@windriver.com: On 03/26/2015 07:44 PM, Rui Chen wrote: Yes, you are right, but we found our instance hang at first dom.shutdown() call, if the dom.shutdown() don't return, there is no chance to execute dom.destroy(), right? Correct. The code is written assuming dom.shutdown() cannot block indefinitely. The libvirt docs at https://libvirt.org/html/libvirt-libvirt-domain.html# virDomainShutdown say ...this command returns as soon as the shutdown request is issued rather than blocking until the guest is no longer running. If dom.shutdown() blocks indefinitely, then that's a libvirt bug. Chris __ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev __ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
Re: [openstack-dev] [nova] [libvirt] The risk of hanging when shutdown instance.
On 03/26/2015 07:44 PM, Rui Chen wrote: Yes, you are right, but we found our instance hang at first dom.shutdown() call, if the dom.shutdown() don't return, there is no chance to execute dom.destroy(), right? Correct. The code is written assuming dom.shutdown() cannot block indefinitely. The libvirt docs at https://libvirt.org/html/libvirt-libvirt-domain.html#virDomainShutdown; say ...this command returns as soon as the shutdown request is issued rather than blocking until the guest is no longer running. If dom.shutdown() blocks indefinitely, then that's a libvirt bug. Chris __ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
Re: [openstack-dev] [nova] [libvirt] The risk of hanging when shutdown instance.
Yes, you are right, but we found our instance hang at first dom.shutdown() call, if the dom.shutdown() don't return, there is no chance to execute dom.destroy(), right? 2015-03-26 23:20 GMT+08:00 Chris Friesen chris.frie...@windriver.com: On 03/25/2015 10:15 PM, Rui Chen wrote: Hi all: I found a discuss about the libvirt shutdown API maybe hang when shutdown instance in libvirt community, https://www.redhat.com/archives/libvir-list/2015-March/msg01121.html I'm not sure that whether there are some risks when we shutdown instance in nova. Three questions: 1. Whether acpi is the default shutdown mode in QEMU/KVM hypervisor when we shutdown instance using libvirt? 2. Whether acpi is asynchronous mode, and qemu-agent is synchronous mode when we shutdown instance? 3. If the hypervisor use qemu-agent as default shutdown mode, how we can deal the hanging issue? When shutting down an instance if there is a timeout (controlled by config file or system metadata) the code will first attempt a clean shutdown via dom.shutdown(). If that doesn't terminate the instance by the time the timeout expires, then we'll call virt_dom.destroy(). Chris __ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev __ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
Re: [openstack-dev] [nova] [libvirt] The risk of hanging when shutdown instance.
On 03/25/2015 10:15 PM, Rui Chen wrote: Hi all: I found a discuss about the libvirt shutdown API maybe hang when shutdown instance in libvirt community, https://www.redhat.com/archives/libvir-list/2015-March/msg01121.html I'm not sure that whether there are some risks when we shutdown instance in nova. Three questions: 1. Whether acpi is the default shutdown mode in QEMU/KVM hypervisor when we shutdown instance using libvirt? 2. Whether acpi is asynchronous mode, and qemu-agent is synchronous mode when we shutdown instance? 3. If the hypervisor use qemu-agent as default shutdown mode, how we can deal the hanging issue? When shutting down an instance if there is a timeout (controlled by config file or system metadata) the code will first attempt a clean shutdown via dom.shutdown(). If that doesn't terminate the instance by the time the timeout expires, then we'll call virt_dom.destroy(). Chris __ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
[openstack-dev] [nova] [libvirt] The risk of hanging when shutdown instance.
Hi all: I found a discuss about the libvirt shutdown API maybe hang when shutdown instance in libvirt community, https://www.redhat.com/archives/libvir-list/2015-March/msg01121.html I'm not sure that whether there are some risks when we shutdown instance in nova. Three questions: 1. Whether acpi is the default shutdown mode in QEMU/KVM hypervisor when we shutdown instance using libvirt? 2. Whether acpi is asynchronous mode, and qemu-agent is synchronous mode when we shutdown instance? 3. If the hypervisor use qemu-agent as default shutdown mode, how we can deal the hanging issue? Best Regards. __ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
