Make a little progress every day--/srv/node does not exist cause object-updater and Container-updater crashes (Swift bugs) __openstack

Reprint please explain source: http://blog.csdn.net/cywosp/article/details/23850893
Why is it reasonable to have recently encountered a reasonable bug in Swift during the development process?     And look at the scene description of the bug. There are now two servers, A and B, that are used to prepare the swift cluster, for some reason a disk was not added to the ring file, only disks in B were joined, but all ring files in the/etc/swift/directory of A and B correspond to the same if the/srv on the current a /node directory does not exist, at this time to open the two machines all the Swift service, then B will have no errors and a machine will report the following error: APR 02:35:23 localhost object-updater uncaught exception# 012Traceback (most recent call last): #012 File "/usr/bin/swift-object-updater", line, in <module> #012 Run_daemon (Objectupdater, Conf_file, **options) #012 file "/usr/lib/python2.6/site-packages/swift/common/daemon.py", line 110, In run_daemon#012 Klass (conf). Run (once=once, **kwargs) #012 File "/usr/lib/python2.6/site-packages/swift/common/ daemon.py ", line, in run#012 self.run_forever (**kwargs) #012 File"/usr/lib/python2.6/site-packages/swift/obj/ updater.py ", line, in run_forever#012 for device in Os.listdir (self.devices): #012OSError: [Errno 2] No such file or dir Ectory: '/srv/node '
APR 02:33:10 localhost container-updater uncaught exception#012traceback (most recent call last): #012 File "/USR/BIN/SW Ift-container-updater ", line, in <module> #012 Run_daemon (Containerupdater, Conf_file, **options) #012 file"/ usr/lib/python2.6/site-packages/swift/common/daemon.py ", line $, in run_daemon#012 Klass (conf). Run (once=once, * * Kwargs) #012 File "/usr/lib/python2.6/site-packages/swift/common/daemon.py", Line run#012, self.run_forever (* * Kwargs) #012 File "/usr/lib/python2.6/site-packages/swift/container/updater.py", line 123, in run_forever#012 for path I n self.get_paths (): #012 File "/usr/lib/python2.6/site-packages/swift/container/updater.py", line, in get_paths#012 For device in Os.listdir (self.devices): #012OSError: [Errno 2] No such file or directory: '/srv/node ' through the above log we can know Object-u The Pdater and container-updater two processes all have unknown exceptions, and thus crash.
The above description can explain why the problem is reasonable, because there is no storage device on the a server, so all data is not written to that node, which is equivalent to a proxy deployment node, and all other services except proxy services can be turned off. So Object-updater and Container-updater stop, will be the release of the system resources.