Nova and its use of Olso Incubator Guru Meditation Reports
This blogs describes a error reporting / troubleshooting feature added to Nova a while back which people are probably not generally aware of.
One of the early things I worked on in the Nova libvirt driver was integration of support for the libvirt event notification system. This allowed Nova to get notified when instances are shutdown by the guest OS administrator, instead of having to wait for the background power state sync task to run. Supporting libvirt events was a theoretically simple concept, but in practice there was a nasty surprise. The key issue was that we needed to have a native thread running the libvirt event loop, while the rest of Nova uses green threads. The code kept getting bizarre deadlocks, which were eventually traced to use of the python logging APIs in the native thread. Since eventlet had monkeypatched the thread mutex primitives, the logging APIs couldn’t be safely called from the native thread as they’d try to obtain a green mutex from a native thread context.
Eventlet has a concept of a backdoor port, which lets you connect to the python process using telnet and get an interactive python prompt. After turning this on, I got a stack trace of all green and native threads and eventually figured out the problem, which was great. Sadly the eventlet backdoor is not something anyone sane would ever enable out of the box on production systems – you don’t really want to allow remote command execution to anyone who can connect to a TCP port :-) Another debugging option is to use Python’s native debugger, but this is again something you have to enable ahead of time and won’t be something admins enable out of the box on production systems. It is possible to connect to a running python process with GDB and get a crude stack trace, but that’s not great either as it requires python debuginfo libraries installed. It would be possible to build an administrative debugging API for Nova using the REST API, but that only works if the REST API & message bus are working – not something that’s going to be much use when Nova itself has deadlocked the entire python interpretor
After this debugging experience I decided to propose something that I’ve had on previous complex systems, a facility that allows an admin to trigger a live error report. Crucially this facility must not require any kind of deployment setup tasks and thus be guaranteed available at all times, especially on production systems where debugging options are limited by the need to maintain service to users. I called the proposal the “Guru Meditation Report” in reference to old Amiga crash reports. I did a quick proof of concept to test the idea, but Solly Ross turned the idea into a complete feature for OpenStack, adding it to the Oslo Incubator in the openstack.common.reports namespace and integrating with Nova. This shipped with the Icehouse release of Nova.
Service integration & usage
Integration into projects is quite straightforward, the openstack-common.conf file needs to list the relevant modules to import from oslo-incubator
$ grep report openstack-common.conf module=report module=report.generators module=report.models module=report.views module=report.views.json module=report.views.text module=report.views.xml
then each service process needs to initialize the error report system. This just requires a single import line and method call from the main method
$ cat nova/cmd/nova-compute
...snip...
from nova.openstack.common.report import guru_meditation_report as gmr
...snip...
def main():
gmr.TextGuruMeditation.setup_autorun(version)
...run eventlet service or whatever...
The setup_autorun method installs a signal handler connected to SIGUSR1 which will dump an error report to stderr when triggered.
So from Icehouse onwards, if any Nova process is mis-behaving you can simply run something like
$ kill -USR1 `pgrep nova-compute`
to get a detailed error report of the process state sent to stderr. On RHEL-7 / Fedora systems this data should end up going into the systemd journal for that service. On other systems you may be lucky enough for the init service to have redirected stderr to a log file, or unlucky enough to have it sent to /dev/null. Did I mention the systemd journal is a really exactly feature when troubleshooting service problems :-)
Error report information
In the oslo-incubator code there are 5 standard sections defined for the error report
- Config – dump of all configuration settings loaded by oslo.config – useful because the config settings loaded in memory don’t necessarily match what is currently stored in /etc/nova/nova.conf on disk – eg admin may have modified the config and forgotten to reload the services.
- Package – information about the software package, as passed into the setup_autorun method previously. This lets you know the openstack release version number, the vendor who packaged it and any vendor specific version info such as the RPM release number. This is again key, because what’s installed on the host currently may not match the version that’s actually running. You can’t always trust the admins to give you correct info when reporting bugs, so having software report itself is more reliable.
- Process – information about the running process including the process ID, parent process ID, user ID, group ID and scheduler state.
- Green Threads – stack trace of every eventlet green thread currently in existence
- Native Threads – stack trace of every native thread currently in existence
The report framework is modular, so it is possible to register new generator functions which add further data to the error report. This is useful if there is application specific data that is useful to include, that would not otherwise be suitable for inclusion in oslo-incubator directly. The data model is separated from the output formatting code, so it is possible to output the report in a number of different data formats. The reports which get sent to stderr are using a crude plain text format, but it is possible to have reports generated in XML, JSON, or another completely custom format.
Future improvements
Triggering from a UNIX signal and printing to stderr, is a very simple and reliable approach that we can guarantee will almost always work no matter what operational state the OpenStack deployment as a whole is in. It should not be considered the only possible approach though. I can see that it may be desirable to also wire this up to RPC messaging bus, so a cloud admin can remotely generate an error report for a service and get the response back over the message bus in an XML or JSON format. This wouldn’t replace the SIGUSR1 based stderr dumps, but rather augment them, as we want to retain the ability to trigger reports even if rabbitmq bus connection is dead/broken for some reason.
AFAIK, this error report system is only wired up into the Nova project at this time. It is desirable to bring this feature over to projects like Neutron, Cinder, Glance, Keystone too, so it can be a considered an openstack wide standard system for admins to collect data for troubleshooting. As explained above, this is no more difficult that adding the modules to openstack-common.conf and then adding a single method call to the service startup main method. Those projects might like to register extra error report sections to provide further data, but that’s by no means required for initial integration.
Having error reports triggered on demand by the admin is nice, but I think there is also value in having error reports triggered automatically in response to unexpected error conditions. For example if a RPC request to boot a new VM instance fails, it could be desirable to save a detailed error report, rather than just having an exception hit the logs with no context around it. In such a scenario you would extend the error report generator so that the report included the exception information & stack trace, and also include the headers and/or payload of the RPC request that failed. The error report would probably be written to a file instead of stderr, using JSON or XML. Tools could then be written to analyse error reports and identify commonly recurring problems.
Even with the current level of features for the error report system, it has proved its worth in facilitating the debugging of a number of problems in Nova, where things like the eventlet backdoor or python debugger were impractical to use. I look forward to its continued development and broader usage across openstack.
Example report
What follows below is an example error report from the nova-compute service running in one of my development hosts. Notice that oslo.conf configuration parameters that were declared with the ‘secret’ flag have their value masked. This is primarily aiming to prevent passwords making their way into the error report, since the expectation is the users may attach these reports to public bugs.
========================================================================
==== Guru Meditation ====
========================================================================
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
========================================================================
==== Package ====
========================================================================
product = OpenStack Nova
vendor = OpenStack Foundation
version = 2015.1
========================================================================
==== Threads ====
========================================================================
------ Thread #140157298652928 ------
/usr/lib64/python2.7/threading.py:784 in __bootstrap
`self.__bootstrap_inner()`
/usr/lib64/python2.7/threading.py:811 in __bootstrap_inner
`self.run()`
/usr/lib64/python2.7/threading.py:764 in run
`self.__target(*self.__args, **self.__kwargs)`
/usr/lib/python2.7/site-packages/eventlet/tpool.py:72 in tworker
`msg = _reqq.get()`
/usr/lib64/python2.7/Queue.py:168 in get
`self.not_empty.wait()`
/usr/lib64/python2.7/threading.py:339 in wait
`waiter.acquire()`
------ Thread #140157307045632 ------
/usr/lib64/python2.7/threading.py:784 in __bootstrap
`self.__bootstrap_inner()`
/usr/lib64/python2.7/threading.py:811 in __bootstrap_inner
`self.run()`
/usr/lib64/python2.7/threading.py:764 in run
`self.__target(*self.__args, **self.__kwargs)`
/usr/lib/python2.7/site-packages/eventlet/tpool.py:72 in tworker
`msg = _reqq.get()`
/usr/lib64/python2.7/Queue.py:168 in get
`self.not_empty.wait()`
/usr/lib64/python2.7/threading.py:339 in wait
`waiter.acquire()`
------ Thread #140157734876928 ------
/usr/lib64/python2.7/threading.py:784 in __bootstrap
`self.__bootstrap_inner()`
/usr/lib64/python2.7/threading.py:811 in __bootstrap_inner
`self.run()`
/usr/lib64/python2.7/threading.py:764 in run
`self.__target(*self.__args, **self.__kwargs)`
/usr/lib/python2.7/site-packages/eventlet/tpool.py:72 in tworker
`msg = _reqq.get()`
/usr/lib64/python2.7/Queue.py:168 in get
`self.not_empty.wait()`
/usr/lib64/python2.7/threading.py:339 in wait
`waiter.acquire()`
------ Thread #140158288500480 ------
/usr/lib64/python2.7/threading.py:784 in __bootstrap
`self.__bootstrap_inner()`
/usr/lib64/python2.7/threading.py:811 in __bootstrap_inner
`self.run()`
/usr/lib64/python2.7/threading.py:764 in run
`self.__target(*self.__args, **self.__kwargs)`
/usr/lib/python2.7/site-packages/eventlet/tpool.py:72 in tworker
`msg = _reqq.get()`
/usr/lib64/python2.7/Queue.py:168 in get
`self.not_empty.wait()`
/usr/lib64/python2.7/threading.py:339 in wait
`waiter.acquire()`
------ Thread #140158416287488 ------
/usr/lib64/python2.7/threading.py:784 in __bootstrap
`self.__bootstrap_inner()`
/usr/lib64/python2.7/threading.py:811 in __bootstrap_inner
`self.run()`
/usr/lib64/python2.7/threading.py:764 in run
`self.__target(*self.__args, **self.__kwargs)`
/usr/lib/python2.7/site-packages/eventlet/tpool.py:72 in tworker
`msg = _reqq.get()`
/usr/lib64/python2.7/Queue.py:168 in get
`self.not_empty.wait()`
/usr/lib64/python2.7/threading.py:339 in wait
`waiter.acquire()`
------ Thread #140158424680192 ------
/usr/lib64/python2.7/threading.py:784 in __bootstrap
`self.__bootstrap_inner()`
/usr/lib64/python2.7/threading.py:811 in __bootstrap_inner
`self.run()`
/usr/lib64/python2.7/threading.py:764 in run
`self.__target(*self.__args, **self.__kwargs)`
/home/berrange/src/cloud/nova/nova/virt/libvirt/host.py:113 in _native_thread
`libvirt.virEventRunDefaultImpl()`
/usr/lib64/python2.7/site-packages/libvirt.py:340 in virEventRunDefaultImpl
`ret = libvirtmod.virEventRunDefaultImpl()`
------ Thread #140157684520704 ------
/usr/lib64/python2.7/threading.py:784 in __bootstrap
`self.__bootstrap_inner()`
/usr/lib64/python2.7/threading.py:811 in __bootstrap_inner
`self.run()`
/usr/lib64/python2.7/threading.py:764 in run
`self.__target(*self.__args, **self.__kwargs)`
/usr/lib/python2.7/site-packages/eventlet/tpool.py:72 in tworker
`msg = _reqq.get()`
/usr/lib64/python2.7/Queue.py:168 in get
`self.not_empty.wait()`
/usr/lib64/python2.7/threading.py:339 in wait
`waiter.acquire()`
------ Thread #140158296893184 ------
/usr/lib64/python2.7/threading.py:784 in __bootstrap
`self.__bootstrap_inner()`
/usr/lib64/python2.7/threading.py:811 in __bootstrap_inner
`self.run()`
/usr/lib64/python2.7/threading.py:764 in run
`self.__target(*self.__args, **self.__kwargs)`
/usr/lib/python2.7/site-packages/eventlet/tpool.py:72 in tworker
`msg = _reqq.get()`
/usr/lib64/python2.7/Queue.py:168 in get
`self.not_empty.wait()`
/usr/lib64/python2.7/threading.py:339 in wait
`waiter.acquire()`
------ Thread #140158305285888 ------
/usr/lib64/python2.7/threading.py:784 in __bootstrap
`self.__bootstrap_inner()`
/usr/lib64/python2.7/threading.py:811 in __bootstrap_inner
`self.run()`
/usr/lib64/python2.7/threading.py:764 in run
`self.__target(*self.__args, **self.__kwargs)`
/usr/lib/python2.7/site-packages/eventlet/tpool.py:72 in tworker
`msg = _reqq.get()`
/usr/lib64/python2.7/Queue.py:168 in get
`self.not_empty.wait()`
/usr/lib64/python2.7/threading.py:339 in wait
`waiter.acquire()`
------ Thread #140157709698816 ------
/usr/lib64/python2.7/threading.py:784 in __bootstrap
`self.__bootstrap_inner()`
/usr/lib64/python2.7/threading.py:811 in __bootstrap_inner
`self.run()`
/usr/lib64/python2.7/threading.py:764 in run
`self.__target(*self.__args, **self.__kwargs)`
/usr/lib/python2.7/site-packages/eventlet/tpool.py:72 in tworker
`msg = _reqq.get()`
/usr/lib64/python2.7/Queue.py:168 in get
`self.not_empty.wait()`
/usr/lib64/python2.7/threading.py:339 in wait
`waiter.acquire()`
------ Thread #140158322071296 ------
/usr/lib64/python2.7/threading.py:784 in __bootstrap
`self.__bootstrap_inner()`
/usr/lib64/python2.7/threading.py:811 in __bootstrap_inner
`self.run()`
/usr/lib64/python2.7/threading.py:764 in run
`self.__target(*self.__args, **self.__kwargs)`
/usr/lib/python2.7/site-packages/eventlet/tpool.py:72 in tworker
`msg = _reqq.get()`
/usr/lib64/python2.7/Queue.py:168 in get
`self.not_empty.wait()`
/usr/lib64/python2.7/threading.py:339 in wait
`waiter.acquire()`
------ Thread #140157726484224 ------
/usr/lib64/python2.7/threading.py:784 in __bootstrap
`self.__bootstrap_inner()`
/usr/lib64/python2.7/threading.py:811 in __bootstrap_inner
`self.run()`
/usr/lib64/python2.7/threading.py:764 in run
`self.__target(*self.__args, **self.__kwargs)`
/usr/lib/python2.7/site-packages/eventlet/tpool.py:72 in tworker
`msg = _reqq.get()`
/usr/lib64/python2.7/Queue.py:168 in get
`self.not_empty.wait()`
/usr/lib64/python2.7/threading.py:339 in wait
`waiter.acquire()`
------ Thread #140158330464000 ------
/usr/lib64/python2.7/threading.py:784 in __bootstrap
`self.__bootstrap_inner()`
/usr/lib64/python2.7/threading.py:811 in __bootstrap_inner
`self.run()`
/usr/lib64/python2.7/threading.py:764 in run
`self.__target(*self.__args, **self.__kwargs)`
/usr/lib/python2.7/site-packages/eventlet/tpool.py:72 in tworker
`msg = _reqq.get()`
/usr/lib64/python2.7/Queue.py:168 in get
`self.not_empty.wait()`
/usr/lib64/python2.7/threading.py:339 in wait
`waiter.acquire()`
------ Thread #140157332223744 ------
/usr/lib64/python2.7/threading.py:784 in __bootstrap
`self.__bootstrap_inner()`
/usr/lib64/python2.7/threading.py:811 in __bootstrap_inner
`self.run()`
/usr/lib64/python2.7/threading.py:764 in run
`self.__target(*self.__args, **self.__kwargs)`
/usr/lib/python2.7/site-packages/eventlet/tpool.py:72 in tworker
`msg = _reqq.get()`
/usr/lib64/python2.7/Queue.py:168 in get
`self.not_empty.wait()`
/usr/lib64/python2.7/threading.py:339 in wait
`waiter.acquire()`
------ Thread #140157701306112 ------
/usr/lib64/python2.7/threading.py:784 in __bootstrap
`self.__bootstrap_inner()`
/usr/lib64/python2.7/threading.py:811 in __bootstrap_inner
`self.run()`
/usr/lib64/python2.7/threading.py:764 in run
`self.__target(*self.__args, **self.__kwargs)`
/usr/lib/python2.7/site-packages/eventlet/tpool.py:72 in tworker
`msg = _reqq.get()`
/usr/lib64/python2.7/Queue.py:168 in get
`self.not_empty.wait()`
/usr/lib64/python2.7/threading.py:339 in wait
`waiter.acquire()`
------ Thread #140157692913408 ------
/usr/lib64/python2.7/threading.py:784 in __bootstrap
`self.__bootstrap_inner()`
/usr/lib64/python2.7/threading.py:811 in __bootstrap_inner
`self.run()`
/usr/lib64/python2.7/threading.py:764 in run
`self.__target(*self.__args, **self.__kwargs)`
/usr/lib/python2.7/site-packages/eventlet/tpool.py:72 in tworker
`msg = _reqq.get()`
/usr/lib64/python2.7/Queue.py:168 in get
`self.not_empty.wait()`
/usr/lib64/python2.7/threading.py:339 in wait
`waiter.acquire()`
------ Thread #140157315438336 ------
/usr/lib64/python2.7/threading.py:784 in __bootstrap
`self.__bootstrap_inner()`
/usr/lib64/python2.7/threading.py:811 in __bootstrap_inner
`self.run()`
/usr/lib64/python2.7/threading.py:764 in run
`self.__target(*self.__args, **self.__kwargs)`
/usr/lib/python2.7/site-packages/eventlet/tpool.py:72 in tworker
`msg = _reqq.get()`
/usr/lib64/python2.7/Queue.py:168 in get
`self.not_empty.wait()`
/usr/lib64/python2.7/threading.py:339 in wait
`waiter.acquire()`
------ Thread #140158537955136 ------
/usr/lib/python2.7/site-packages/eventlet/hubs/hub.py:346 in run
`self.wait(sleep_time)`
/usr/lib/python2.7/site-packages/eventlet/hubs/poll.py:85 in wait
`presult = self.do_poll(seconds)`
/usr/lib/python2.7/site-packages/eventlet/hubs/epolls.py:62 in do_poll
`return self.poll.poll(seconds)`
------ Thread #140158313678592 ------
/usr/lib64/python2.7/threading.py:784 in __bootstrap
`self.__bootstrap_inner()`
/usr/lib64/python2.7/threading.py:811 in __bootstrap_inner
`self.run()`
/usr/lib64/python2.7/threading.py:764 in run
`self.__target(*self.__args, **self.__kwargs)`
/usr/lib/python2.7/site-packages/eventlet/tpool.py:72 in tworker
`msg = _reqq.get()`
/usr/lib64/python2.7/Queue.py:168 in get
`self.not_empty.wait()`
/usr/lib64/python2.7/threading.py:339 in wait
`waiter.acquire()`
------ Thread #140157718091520 ------
/usr/lib64/python2.7/threading.py:784 in __bootstrap
`self.__bootstrap_inner()`
/usr/lib64/python2.7/threading.py:811 in __bootstrap_inner
`self.run()`
/usr/lib64/python2.7/threading.py:764 in run
`self.__target(*self.__args, **self.__kwargs)`
/usr/lib/python2.7/site-packages/eventlet/tpool.py:72 in tworker
`msg = _reqq.get()`
/usr/lib64/python2.7/Queue.py:168 in get
`self.not_empty.wait()`
/usr/lib64/python2.7/threading.py:339 in wait
`waiter.acquire()`
------ Thread #140157323831040 ------
/usr/lib64/python2.7/threading.py:784 in __bootstrap
`self.__bootstrap_inner()`
/usr/lib64/python2.7/threading.py:811 in __bootstrap_inner
`self.run()`
/usr/lib64/python2.7/threading.py:764 in run
`self.__target(*self.__args, **self.__kwargs)`
/usr/lib/python2.7/site-packages/eventlet/tpool.py:72 in tworker
`msg = _reqq.get()`
/usr/lib64/python2.7/Queue.py:168 in get
`self.not_empty.wait()`
/usr/lib64/python2.7/threading.py:339 in wait
`waiter.acquire()`
------ Thread #140158338856704 ------
/usr/lib64/python2.7/threading.py:784 in __bootstrap
`self.__bootstrap_inner()`
/usr/lib64/python2.7/threading.py:811 in __bootstrap_inner
`self.run()`
/usr/lib64/python2.7/threading.py:764 in run
`self.__target(*self.__args, **self.__kwargs)`
/usr/lib/python2.7/site-packages/eventlet/tpool.py:72 in tworker
`msg = _reqq.get()`
/usr/lib64/python2.7/Queue.py:168 in get
`self.not_empty.wait()`
/usr/lib64/python2.7/threading.py:339 in wait
`waiter.acquire()`
========================================================================
==== Green Threads ====
========================================================================
------ Green Thread ------
/usr/bin/nova-compute:9 in <module>
`load_entry_point('nova==2015.1.dev352', 'console_scripts', 'nova-compute')()`
/home/berrange/src/cloud/nova/nova/cmd/compute.py:74 in main
`service.wait()`
/home/berrange/src/cloud/nova/nova/service.py:444 in wait
`_launcher.wait()`
/home/berrange/src/cloud/nova/nova/openstack/common/service.py:187 in wait
`status, signo = self._wait_for_exit_or_signal(ready_callback)`
/home/berrange/src/cloud/nova/nova/openstack/common/service.py:170 in _wait_for_exit_or_signal
`super(ServiceLauncher, self).wait()`
/home/berrange/src/cloud/nova/nova/openstack/common/service.py:133 in wait
`self.services.wait()`
/home/berrange/src/cloud/nova/nova/openstack/common/service.py:473 in wait
`self.tg.wait()`
/home/berrange/src/cloud/nova/nova/openstack/common/threadgroup.py:145 in wait
`x.wait()`
/home/berrange/src/cloud/nova/nova/openstack/common/threadgroup.py:47 in wait
`return self.thread.wait()`
/usr/lib/python2.7/site-packages/eventlet/greenthread.py:175 in wait
`return self._exit_event.wait()`
/usr/lib/python2.7/site-packages/eventlet/event.py:121 in wait
`return hubs.get_hub().switch()`
/usr/lib/python2.7/site-packages/eventlet/hubs/hub.py:294 in switch
`return self.greenlet.switch()`
------ Green Thread ------
No Traceback!
------ Green Thread ------
/usr/lib/python2.7/site-packages/eventlet/green/thread.py:40 in __thread_body
`func(*args, **kwargs)`
/usr/lib64/python2.7/threading.py:784 in __bootstrap
`self.__bootstrap_inner()`
/usr/lib64/python2.7/threading.py:811 in __bootstrap_inner
`self.run()`
/usr/lib64/python2.7/threading.py:764 in run
`self.__target(*self.__args, **self.__kwargs)`
/usr/lib/python2.7/site-packages/qpid/selector.py:126 in run
`rd, wr, ex = select(self.reading, self.writing, (), timeout)`
/usr/lib/python2.7/site-packages/eventlet/green/select.py:83 in select
`return hub.switch()`
/usr/lib/python2.7/site-packages/eventlet/hubs/hub.py:294 in switch
`return self.greenlet.switch()`
------ Green Thread ------
/usr/lib/python2.7/site-packages/eventlet/greenthread.py:214 in main
`result = function(*args, **kwargs)`
/home/berrange/src/cloud/nova/nova/openstack/common/service.py:492 in run_service
`done.wait()`
/usr/lib/python2.7/site-packages/eventlet/event.py:121 in wait
`return hubs.get_hub().switch()`
/usr/lib/python2.7/site-packages/eventlet/hubs/hub.py:294 in switch
`return self.greenlet.switch()`
------ Green Thread ------
/usr/lib/python2.7/site-packages/eventlet/greenthread.py:214 in main
`result = function(*args, **kwargs)`
/home/berrange/src/cloud/nova/nova/virt/libvirt/host.py:124 in _dispatch_thread
`self._dispatch_events()`
/home/berrange/src/cloud/nova/nova/virt/libvirt/host.py:228 in _dispatch_events
`_c = self._event_notify_recv.read(1)`
/usr/lib64/python2.7/socket.py:380 in read
`data = self._sock.recv(left)`
/usr/lib/python2.7/site-packages/eventlet/greenio.py:464 in recv
`self._trampoline(self, read=True)`
/usr/lib/python2.7/site-packages/eventlet/greenio.py:439 in _trampoline
`mark_as_closed=self._mark_as_closed)`
/usr/lib/python2.7/site-packages/eventlet/hubs/__init__.py:162 in trampoline
`return hub.switch()`
/usr/lib/python2.7/site-packages/eventlet/hubs/hub.py:294 in switch
`return self.greenlet.switch()`
------ Green Thread ------
/usr/lib/python2.7/site-packages/eventlet/tpool.py:55 in tpool_trampoline
`_c = _rsock.recv(1)`
/usr/lib/python2.7/site-packages/eventlet/greenio.py:325 in recv
`timeout_exc=socket.timeout("timed out"))`
/usr/lib/python2.7/site-packages/eventlet/greenio.py:200 in _trampoline
`mark_as_closed=self._mark_as_closed)`
/usr/lib/python2.7/site-packages/eventlet/hubs/__init__.py:162 in trampoline
`return hub.switch()`
/usr/lib/python2.7/site-packages/eventlet/hubs/hub.py:294 in switch
`return self.greenlet.switch()`
------ Green Thread ------
/usr/lib/python2.7/site-packages/eventlet/greenthread.py:214 in main
`result = function(*args, **kwargs)`
/usr/lib/python2.7/site-packages/oslo_utils/excutils.py:92 in inner_func
`return infunc(*args, **kwargs)`
/usr/lib/python2.7/site-packages/oslo_messaging/_executors/impl_eventlet.py:93 in _executor_thread
`incoming = self.listener.poll()`
/usr/lib/python2.7/site-packages/oslo_messaging/_drivers/amqpdriver.py:121 in poll
`self.conn.consume(limit=1, timeout=timeout)`
/usr/lib/python2.7/site-packages/oslo_messaging/_drivers/impl_qpid.py:755 in consume
`six.next(it)`
/usr/lib/python2.7/site-packages/oslo_messaging/_drivers/impl_qpid.py:685 in iterconsume
`yield self.ensure(_error_callback, _consume)`
/usr/lib/python2.7/site-packages/oslo_messaging/_drivers/impl_qpid.py:602 in ensure
`return method()`
/usr/lib/python2.7/site-packages/oslo_messaging/_drivers/impl_qpid.py:669 in _consume
`timeout=poll_timeout)`
<string>:6 in next_receiver
(source not found)
/usr/lib/python2.7/site-packages/qpid/messaging/endpoints.py:674 in next_receiver
`if self._ecwait(lambda: self.incoming, timeout):`
/usr/lib/python2.7/site-packages/qpid/messaging/endpoints.py:50 in _ecwait
`result = self._ewait(lambda: self.closed or predicate(), timeout)`
/usr/lib/python2.7/site-packages/qpid/messaging/endpoints.py:580 in _ewait
`result = self.connection._ewait(lambda: self.error or predicate(), timeout)`
/usr/lib/python2.7/site-packages/qpid/messaging/endpoints.py:218 in _ewait
`result = self._wait(lambda: self.error or predicate(), timeout)`
/usr/lib/python2.7/site-packages/qpid/messaging/endpoints.py:197 in _wait
`return self._waiter.wait(predicate, timeout=timeout)`
/usr/lib/python2.7/site-packages/qpid/concurrency.py:59 in wait
`self.condition.wait(timeout - passed)`
/usr/lib/python2.7/site-packages/qpid/concurrency.py:96 in wait
`sw.wait(timeout)`
/usr/lib/python2.7/site-packages/qpid/compat.py:53 in wait
`ready, _, _ = select([self], [], [], timeout)`
/usr/lib/python2.7/site-packages/eventlet/green/select.py:83 in select
`return hub.switch()`
/usr/lib/python2.7/site-packages/eventlet/hubs/hub.py:294 in switch
`return self.greenlet.switch()`
------ Green Thread ------
/home/berrange/src/cloud/nova/nova/openstack/common/loopingcall.py:90 in _inner
`greenthread.sleep(-delay if delay < 0 else 0)`
/usr/lib/python2.7/site-packages/eventlet/greenthread.py:34 in sleep
`hub.switch()`
/usr/lib/python2.7/site-packages/eventlet/hubs/hub.py:294 in switch
`return self.greenlet.switch()`
------ Green Thread ------
/usr/lib/python2.7/site-packages/eventlet/greenthread.py:214 in main
`result = function(*args, **kwargs)`
/home/berrange/src/cloud/nova/nova/openstack/common/loopingcall.py:133 in _inner
`greenthread.sleep(idle)`
/usr/lib/python2.7/site-packages/eventlet/greenthread.py:34 in sleep
`hub.switch()`
/usr/lib/python2.7/site-packages/eventlet/hubs/hub.py:294 in switch
`return self.greenlet.switch()`
========================================================================
==== Processes ====
========================================================================
Process 27760 (under 27711) [ run by: berrange (1000), state: running ]
========================================================================
==== Configuration ====
========================================================================
cells:
bandwidth_update_interval = 600
call_timeout = 60
capabilities =
hypervisor=xenserver;kvm
os=linux;windows
cell_type = compute
enable = False
manager = nova.cells.manager.CellsManager
mute_child_interval = 300
name = nova
reserve_percent = 10.0
topic = cells
cinder:
cafile = None
catalog_info = volumev2:cinderv2:publicURL
certfile = None
cross_az_attach = True
endpoint_template = None
http_retries = 3
insecure = False
keyfile = None
os_region_name = None
timeout = None
conductor:
manager = nova.conductor.manager.ConductorManager
topic = conductor
use_local = False
workers = None
database:
backend = sqlalchemy
connection = ***
connection_debug = 0
connection_trace = False
db_inc_retry_interval = True
db_max_retries = 20
db_max_retry_interval = 10
db_retry_interval = 1
idle_timeout = 3600
max_overflow = None
max_pool_size = None
max_retries = 10
min_pool_size = 1
mysql_sql_mode = TRADITIONAL
pool_timeout = None
retry_interval = 10
slave_connection = ***
sqlite_db = nova.sqlite
sqlite_synchronous = True
use_db_reconnect = False
use_tpool = False
default:
allow_migrate_to_same_host = True
allow_resize_to_same_host = True
allow_same_net_traffic = True
amqp_auto_delete = False
amqp_durable_queues = False
api_paste_config = /etc/nova/api-paste.ini
api_rate_limit = False
auth_strategy = keystone
auto_assign_floating_ip = False
backdoor_port = None
bandwidth_poll_interval = 600
bindir = /usr/bin
block_device_allocate_retries = 60
block_device_allocate_retries_interval = 3
boot_script_template = /home/berrange/src/cloud/nova/nova/cloudpipe/bootscript.template
ca_file = cacert.pem
ca_path = /home/berrange/src/cloud/data/nova/CA
cert_manager = nova.cert.manager.CertManager
client_socket_timeout = 900
cnt_vpn_clients = 0
compute_available_monitors =
nova.compute.monitors.all_monitors
compute_driver = libvirt.LibvirtDriver
compute_manager = nova.compute.manager.ComputeManager
compute_monitors =
compute_resources =
vcpu
compute_stats_class = nova.compute.stats.Stats
compute_topic = compute
config-dir = None
config-file =
/etc/nova/nova.conf
config_drive_format = iso9660
config_drive_skip_versions = 1.0 2007-01-19 2007-03-01 2007-08-29 2007-10-10 2007-12-15 2008-02-01 2008-09-01
console_host = mustard.gsslab.fab.redhat.com
console_manager = nova.console.manager.ConsoleProxyManager
console_topic = console
consoleauth_manager = nova.consoleauth.manager.ConsoleAuthManager
consoleauth_topic = consoleauth
control_exchange = nova
create_unique_mac_address_attempts = 5
crl_file = crl.pem
db_driver = nova.db
debug = True
default_access_ip_network_name = None
default_availability_zone = nova
default_ephemeral_format = ext4
default_flavor = m1.small
default_floating_pool = public
default_log_levels =
amqp=WARN
amqplib=WARN
boto=WARN
glanceclient=WARN
iso8601=WARN
keystonemiddleware=WARN
oslo.messaging=INFO
qpid=WARN
requests.packages.urllib3.connectionpool=WARN
routes.middleware=WARN
sqlalchemy=WARN
stevedore=WARN
suds=INFO
urllib3.connectionpool=WARN
websocket=WARN
default_notification_level = INFO
default_publisher_id = None
default_schedule_zone = None
defer_iptables_apply = False
dhcp_domain = novalocal
dhcp_lease_time = 86400
dhcpbridge = /usr/bin/nova-dhcpbridge
dhcpbridge_flagfile =
/etc/nova/nova.conf
dmz_cidr =
dmz_mask = 255.255.255.0
dmz_net = 10.0.0.0
dns_server =
dns_update_periodic_interval = -1
dnsmasq_config_file =
ebtables_exec_attempts = 3
ebtables_retry_interval = 1.0
ec2_listen = 0.0.0.0
ec2_listen_port = 8773
ec2_private_dns_show_ip = False
ec2_strict_validation = True
ec2_timestamp_expiry = 300
ec2_workers = 2
enable_new_services = True
enabled_apis =
ec2
metadata
osapi_compute
enabled_ssl_apis =
fake_call = False
fake_network = False
fatal_deprecations = False
fatal_exception_format_errors = False
firewall_driver = nova.virt.libvirt.firewall.IptablesFirewallDriver
fixed_ip_disassociate_timeout = 600
fixed_range_v6 = fd00::/48
flat_injected = False
flat_interface = p1p1
flat_network_bridge = br100
flat_network_dns = 8.8.4.4
floating_ip_dns_manager = nova.network.noop_dns_driver.NoopDNSDriver
force_config_drive = always
force_dhcp_release = True
force_raw_images = True
force_snat_range =
forward_bridge_interface =
all
gateway = None
gateway_v6 = None
heal_instance_info_cache_interval = 60
host = mustard.gsslab.fab.redhat.com
image_cache_manager_interval = 2400
image_cache_subdirectory_name = _base
injected_network_template = /home/berrange/src/cloud/nova/nova/virt/interfaces.template
instance_build_timeout = 0
instance_delete_interval = 300
instance_dns_domain =
instance_dns_manager = nova.network.noop_dns_driver.NoopDNSDriver
instance_format = [instance: %(uuid)s]
instance_name_template = instance-%08x
instance_usage_audit = False
instance_usage_audit_period = month
instance_uuid_format = [instance: %(uuid)s]
instances_path = /home/berrange/src/cloud/data/nova/instances
internal_service_availability_zone = internal
iptables_bottom_regex =
iptables_drop_action = DROP
iptables_top_regex =
ipv6_backend = rfc2462
key_file = private/cakey.pem
keys_path = /home/berrange/src/cloud/data/nova/keys
keystone_ec2_insecure = False
keystone_ec2_url = http://10.33.8.112:5000/v2.0/ec2tokens
l3_lib = nova.network.l3.LinuxNetL3
linuxnet_interface_driver = nova.network.linux_net.LinuxBridgeInterfaceDriver
linuxnet_ovs_integration_bridge = br-int
live_migration_retry_count = 30
lockout_attempts = 5
lockout_minutes = 15
lockout_window = 15
log-config-append = None
log-date-format = %Y-%m-%d %H:%M:%S
log-dir = None
log-file = None
log-format = None
logging_context_format_string = %(asctime)s.%(msecs)03d %(color)s%(levelname)s %(name)s [%(request_id)s %(user_name)s %(project_name)s%(color)s] %(instance)s%(color)s%(message)s
logging_debug_format_suffix = from (pid=%(process)d) %(funcName)s %(pathname)s:%(lineno)d
logging_default_format_string = %(asctime)s.%(msecs)03d %(color)s%(levelname)s %(name)s [-%(color)s] %(instance)s%(color)s%(message)s
logging_exception_prefix = %(color)s%(asctime)s.%(msecs)03d TRACE %(name)s %(instance)s
max_age = 0
max_concurrent_builds = 10
max_header_line = 16384
max_local_block_devices = 3
maximum_instance_delete_attempts = 5
memcached_servers = None
metadata_host = 10.33.8.112
metadata_listen = 0.0.0.0
metadata_listen_port = 8775
metadata_manager = nova.api.manager.MetadataManager
metadata_port = 8775
metadata_workers = 2
migrate_max_retries = -1
mkisofs_cmd = genisoimage
monkey_patch = False
monkey_patch_modules =
nova.api.ec2.cloud:nova.notifications.notify_decorator
nova.compute.api:nova.notifications.notify_decorator
multi_host = True
multi_instance_display_name_template = %(name)s-%(count)d
my_block_storage_ip = 10.33.8.112
my_ip = 10.33.8.112
network_allocate_retries = 0
network_api_class = nova.network.api.API
network_device_mtu = None
network_driver = nova.network.linux_net
network_manager = nova.network.manager.FlatDHCPManager
network_size = 256
network_topic = network
networks_path = /home/berrange/src/cloud/data/nova/networks
non_inheritable_image_properties =
bittorrent
cache_in_nova
notification_driver =
notification_topics =
notifications
notify_api_faults = False
notify_on_state_change = None
novncproxy_base_url = http://10.33.8.112:6080/vnc_auto.html
null_kernel = nokernel
num_networks = 1
osapi_compute_listen = 0.0.0.0
osapi_compute_listen_port = 8774
osapi_compute_workers = 2
ovs_vsctl_timeout = 120
password_length = 12
pci_alias =
pci_passthrough_whitelist =
periodic_enable = True
periodic_fuzzy_delay = 60
policy_default_rule = default
policy_dirs =
policy.d
policy_file = policy.json
preallocate_images = none
project_cert_subject = /C=US/ST=California/O=OpenStack/OU=NovaDev/CN=project-ca-%.16s-%s
public_interface = br100
publish_errors = False
pybasedir = /home/berrange/src/cloud/nova
qpid_heartbeat = 60
qpid_hostname = 10.33.8.112
qpid_hosts =
10.33.8.112:5672
qpid_password = ***
qpid_port = 5672
qpid_protocol = tcp
qpid_receiver_capacity = 1
qpid_sasl_mechanisms =
qpid_tcp_nodelay = True
qpid_topology_version = 1
qpid_username =
quota_cores = 20
quota_driver = nova.quota.DbQuotaDriver
quota_fixed_ips = -1
quota_floating_ips = 10
quota_injected_file_content_bytes = 10240
quota_injected_file_path_length = 255
quota_injected_files = 5
quota_instances = 10
quota_key_pairs = 100
quota_metadata_items = 128
quota_ram = 51200
quota_security_group_rules = 20
quota_security_groups = 10
quota_server_group_members = 10
quota_server_groups = 10
reboot_timeout = 0
reclaim_instance_interval = 0
remove_unused_base_images = True
remove_unused_original_minimum_age_seconds = 86400
report_interval = 10
rescue_timeout = 0
reservation_expire = 86400
reserved_host_disk_mb = 0
reserved_host_memory_mb = 512
resize_confirm_window = 0
resize_fs_using_block_device = False
resume_guests_state_on_host_boot = False
rootwrap_config = /etc/nova/rootwrap.conf
routing_source_ip = 10.33.8.112
rpc_backend = qpid
rpc_conn_pool_size = 30
rpc_response_timeout = 60
rpc_thread_pool_size = 64
run_external_periodic_tasks = True
running_deleted_instance_action = reap
running_deleted_instance_poll_interval = 1800
running_deleted_instance_timeout = 0
scheduler_available_filters =
nova.scheduler.filters.all_filters
scheduler_default_filters =
AvailabilityZoneFilter
ComputeCapabilitiesFilter
ComputeFilter
ImagePropertiesFilter
RamFilter
RetryFilter
ServerGroupAffinityFilter
ServerGroupAntiAffinityFilter
scheduler_manager = nova.scheduler.manager.SchedulerManager
scheduler_max_attempts = 3
scheduler_topic = scheduler
scheduler_weight_classes =
nova.scheduler.weights.all_weighers
security_group_api = nova
send_arp_for_ha = True
send_arp_for_ha_count = 3
service_down_time = 60
servicegroup_driver = db
share_dhcp_address = False
shelved_offload_time = 0
shelved_poll_interval = 3600
shutdown_timeout = 60
snapshot_name_template = snapshot-%s
ssl_ca_file = None
ssl_cert_file = None
ssl_key_file = None
state_path = /home/berrange/src/cloud/data/nova
sync_power_state_interval = 600
syslog-log-facility = LOG_USER
tcp_keepidle = 600
teardown_unused_network_gateway = False
tempdir = None
transport_url = None
until_refresh = 0
update_dns_entries = False
use-syslog = False
use-syslog-rfc-format = False
use_cow_images = True
use_forwarded_for = False
use_ipv6 = False
use_network_dns_servers = False
use_project_ca = False
use_single_default_gateway = False
use_stderr = True
user_cert_subject = /C=US/ST=California/O=OpenStack/OU=NovaDev/CN=%.16s-%.16s-%s
vcpu_pin_set = None
vendordata_driver = nova.api.metadata.vendordata_json.JsonFileVendorData
verbose = True
vif_plugging_is_fatal = True
vif_plugging_timeout = 300
virt_mkfs =
vlan_interface =
vlan_start = 100
vnc_enabled = True
vnc_keymap = en-us
vncserver_listen = 127.0.0.1
vncserver_proxyclient_address = 127.0.0.1
volume_api_class = nova.volume.cinder.API
volume_usage_poll_interval = 0
vpn_flavor = m1.tiny
vpn_image_id = 0
vpn_ip = 10.33.8.112
vpn_key_suffix = -vpn
vpn_start = 1000
wsgi_default_pool_size = 1000
wsgi_keep_alive = True
wsgi_log_format = %(client_ip)s "%(request_line)s" status: %(status_code)s len: %(body_length)s time: %(wall_seconds).7f
xvpvncproxy_base_url = http://10.33.8.112:6081/console
ephemeral_storage_encryption:
cipher = aes-xts-plain64
enabled = False
key_size = 512
glance:
allowed_direct_url_schemes =
api_insecure = False
api_servers =
http://10.33.8.112:9292
host = 10.33.8.112
num_retries = 0
port = 9292
protocol = http
guestfs:
debug = False
keymgr:
api_class = nova.keymgr.conf_key_mgr.ConfKeyManager
libvirt:
block_migration_flag = VIR_MIGRATE_UNDEFINE_SOURCE, VIR_MIGRATE_PEER2PEER, VIR_MIGRATE_LIVE, VIR_MIGRATE_TUNNELLED, VIR_MIGRATE_NON_SHARED_INC
checksum_base_images = False
checksum_interval_seconds = 3600
connection_uri =
cpu_mode = none
cpu_model = None
disk_cachemodes =
disk_prefix = None
gid_maps =
glusterfs_mount_point_base = /home/berrange/src/cloud/data/nova/mnt
hw_disk_discard = None
hw_machine_type = None
image_info_filename_pattern = /home/berrange/src/cloud/data/nova/instances/_base/%(image)s.info
images_rbd_ceph_conf =
images_rbd_pool = rbd
images_type = default
images_volume_group = None
inject_key = False
inject_partition = -2
inject_password = False
iscsi_iface = None
iscsi_use_multipath = False
iser_use_multipath = False
live_migration_bandwidth = 0
live_migration_flag = VIR_MIGRATE_UNDEFINE_SOURCE, VIR_MIGRATE_PEER2PEER, VIR_MIGRATE_LIVE, VIR_MIGRATE_TUNNELLED
live_migration_uri = qemu+ssh://berrange@%s/system
mem_stats_period_seconds = 10
nfs_mount_options = None
nfs_mount_point_base = /home/berrange/src/cloud/data/nova/mnt
num_aoe_discover_tries = 3
num_iscsi_scan_tries = 5
num_iser_scan_tries = 5
qemu_allowed_storage_drivers =
quobyte_client_cfg = None
quobyte_mount_point_base = /home/berrange/src/cloud/data/nova/mnt
rbd_secret_uuid = None
rbd_user = None
remove_unused_kernels = False
remove_unused_resized_minimum_age_seconds = 3600
rescue_image_id = None
rescue_kernel_id = None
rescue_ramdisk_id = None
rng_dev_path = None
scality_sofs_config = None
scality_sofs_mount_point = /home/berrange/src/cloud/data/nova/scality
smbfs_mount_options =
smbfs_mount_point_base = /home/berrange/src/cloud/data/nova/mnt
snapshot_compression = False
snapshot_image_format = None
snapshots_directory = /home/berrange/src/cloud/data/nova/instances/snapshots
sparse_logical_volumes = False
sysinfo_serial = auto
uid_maps =
use_usb_tablet = False
use_virtio_for_bridges = True
virt_type = kvm
volume_clear = zero
volume_clear_size = 0
volume_drivers =
aoe=nova.virt.libvirt.volume.LibvirtAOEVolumeDriver
fake=nova.virt.libvirt.volume.LibvirtFakeVolumeDriver
fibre_channel=nova.virt.libvirt.volume.LibvirtFibreChannelVolumeDriver
glusterfs=nova.virt.libvirt.volume.LibvirtGlusterfsVolumeDriver
gpfs=nova.virt.libvirt.volume.LibvirtGPFSVolumeDriver
iscsi=nova.virt.libvirt.volume.LibvirtISCSIVolumeDriver
iser=nova.virt.libvirt.volume.LibvirtISERVolumeDriver
local=nova.virt.libvirt.volume.LibvirtVolumeDriver
nfs=nova.virt.libvirt.volume.LibvirtNFSVolumeDriver
quobyte=nova.virt.libvirt.volume.LibvirtQuobyteVolumeDriver
rbd=nova.virt.libvirt.volume.LibvirtNetVolumeDriver
scality=nova.virt.libvirt.volume.LibvirtScalityVolumeDriver
sheepdog=nova.virt.libvirt.volume.LibvirtNetVolumeDriver
smbfs=nova.virt.libvirt.volume.LibvirtSMBFSVolumeDriver
wait_soft_reboot_seconds = 120
xen_hvmloader_path = /usr/lib/xen/boot/hvmloader
osapi_v3:
enabled = True
extensions_blacklist =
extensions_whitelist =
oslo_concurrency:
disable_process_locking = False
lock_path = /home/berrange/src/cloud/data/nova
rdp:
enabled = False
html5_proxy_base_url = http://127.0.0.1:6083/
remote_debug:
host = None
port = None
serial_console:
base_url = ws://127.0.0.1:6083/
enabled = False
listen = 127.0.0.1
port_range = 10000:20000
proxyclient_address = 127.0.0.1
spice:
agent_enabled = True
enabled = False
html5proxy_base_url = http://10.33.8.112:6082/spice_auto.html
keymap = en-us
server_listen = 127.0.0.1
server_proxyclient_address = 127.0.0.1
ssl:
ca_file = None
cert_file = None
key_file = None
upgrade_levels:
baseapi = None
cells = None
compute = None
conductor = None
console = None
consoleauth = None
network = None
scheduler = None
workarounds:
disable_libvirt_livesnapshot = True
disable_rootwrap = False