This looks like a request for enhancement to pre-validate in the API
whether an ephemeral_gb resize down will fail later on in nova-compute
to fail faster for users. I think the challenge here is going to be that
resize down is allowed for shared storage, but not for local storage,
and I don't know if we have a way to check "if shared storage" in the
API.
** Changed in: nova
Importance: Undecided => Wishlist
** Changed in: nova
Status: New => Opinion
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https://bugs.launchpad.net/bugs/1755392
Title:
resize fails with: "Unable to resize disk down" for ephemeral_gb
Status in OpenStack Compute (nova):
Opinion
Bug description:
env：openstack master branch
step：
1.admin user create flavor
Flavor Name：test1 VCPUs：1 RAM：256MB Root Disk:5G Ephemeral Disk：5G Swap
Disk:5MB
2.admin user create instance use flavor test1.
3.admin user create a new flavor
Flavor Name：test2 VCPUs：1 RAM：256MB Root Disk:5G Ephemeral Disk：4G Swap
Disk:5MB
（turn down Ephemeral Disk）
4.resize the instance choose flavor test2
problem：
1.resize the instance if ephemeral_gb turn down the nova-compute raise
exception
2.flavor no chnage but horizon no warning
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server [None req-2b01ccc1-f5b1-4a7e-8c07-6cf1f06a56e5 admin
admin] Exception during message handling: ResizeError: Resize error: Unable to
resize disk down.
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server Traceback (most recent call last):
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server File
"/usr/lib/python2.7/site-packages/oslo_messaging/rpc/server.py", line 163, in
_process_incoming
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server res = self.dispatcher.dispatch(message)
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server File
"/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 220,
in dispatch
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server return self._do_dispatch(endpoint, method, ctxt,
args)
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server File
"/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 190,
in _do_dispatch
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server result = func(ctxt, **new_args)
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server File "/opt/stack/nova/nova/exception_wrapper.py",
line 76, in wrapped
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server function_name, call_dict, binary)
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server File
"/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server self.force_reraise()
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server File
"/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in
force_reraise
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server six.reraise(self.type_, self.value, self.tb)
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server File "/opt/stack/nova/nova/exception_wrapper.py",
line 67, in wrapped
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server return f(self, context, *args, **kw)
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server File "/opt/stack/nova/nova/compute/manager.py",
line 186, in decorated_function
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server "Error: %s", e, instance=instance)
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server File
"/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server self.force_reraise()
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server File
"/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in
force_reraise
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server six.reraise(self.type_, self.value, self.tb)
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server File "/opt/stack/nova/nova/compute/manager.py",
line 156, in decorated_function
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server return function(self, context, *args, **kwargs)
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server File "/opt/stack/nova/nova/compute/utils.py", line
970, in decorated_function
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server return function(self, context, *args, **kwargs)
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server File "/opt/stack/nova/nova/compute/manager.py",
line 214, in decorated_function
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server kwargs['instance'], e, sys.exc_info())
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server File
"/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server self.force_reraise()
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server File
"/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in
force_reraise
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server six.reraise(self.type_, self.value, self.tb)
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server File "/opt/stack/nova/nova/compute/manager.py",
line 202, in decorated_function
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server return function(self, context, *args, **kwargs)
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server File "/opt/stack/nova/nova/compute/manager.py",
line 4288, in resize_instance
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server migration, image, disk_info,
migration.dest_compute)
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server File "/usr/lib64/python2.7/contextlib.py", line 35,
in __exit__
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server self.gen.throw(type, value, traceback)
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server File "/opt/stack/nova/nova/compute/manager.py",
line 7429, in _error_out_instance_on_exception
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server raise error.inner_exception
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server ResizeError: Resize error: Unable to resize disk down.
Mar 13 02:11:21 localhost.localdomain nova-compute[7792]: ERROR
oslo_messaging.rpc.server
Analysis
1.nova-compute no judge ephemeral_gb turn down
2.in nova-api judge if ephemeral_gb turn down raise exception
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