[openstack-dev] any recommendations for live debugging of openstack services?

Solly Ross sross at redhat.com
Thu Mar 13 15:11:00 UTC 2014

Well, for a non-interactive view of things, you can use the openstack.common.report functionality.  It's currently integrated into Nova, and I believe that the other projects are working to get it integrated as well.  To use it, you just send a SIGUSR1 to any Nova process, and a report of the current stack traces of threads and green threads, as well as the current configuration options, will be dumped.

It doesn't look like exactly what you want, but I figured it might be useful to you anyway.

Best Regards,
Solly Ross

----- Original Message -----
From: "Chris Friesen" <chris.friesen at windriver.com>
To: "OpenStack Development Mailing List (not for usage questions)" <openstack-dev at lists.openstack.org>
Sent: Wednesday, March 12, 2014 12:47:32 PM
Subject: [openstack-dev] any recommendations for live debugging of openstack	services?

Are there any tools that people can recommend for live debugging of 
openstack services?

I'm looking for a mechanism where I could take a running system that 
isn't behaving the way I expect and somehow poke around inside the 
program while it keeps running.  (Sort of like tracepoints in gdb.)

I've seen mention of things like twisted.manhole and 
eventlet.backdoor...has anyone used this sort of thing with openstack? 
Are there better options?

Also, has anyone ever seen an implementation of watchpoints for python? 
  By that I mean the ability to set a breakpoint if the value of a 
variable changes.  I found 
"https://sourceforge.net/blog/watchpoints-in-python/" but it looks 
pretty hacky.


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