So I agree that n-api should not stack trace... however it successfully
returns a 400 to the service, which I think was expected. Neutron is
exploding on that 400 though, which is not.
** Tags added: ec2
** Also affects: neutron
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1371160
Title:
HTTP 500 while retrieving metadata by non-existent key
Status in OpenStack Neutron (virtual network service):
New
Status in OpenStack Compute (Nova):
New
Bug description:
HTTP 500 error occurs when one tries to get metadata by path
constructed from folder name with appended value.
Steps to repro:
1. Launch VM and access its terminal
2. curl http://169.254.169.254/latest/meta-data/instance-id -- this returns
some string, i.e. i-00000001
3. curl http://169.254.169.254/latest/meta-data/instance-id/i-00000001 --
this returns HTTP 500
It's expected that the last call returns meaningful message and not produce
trace backs in logs.
Errors:
----------
In VM terminal:
$ curl http://169.254.169.254/latest/meta-data/instance-id/i-00000001
<html>
<head>
<title>500 Internal Server Error</title>
</head>
<body>
<h1>500 Internal Server Error</h1>
Remote metadata server experienced an internal server error.<br /><br />
</body>
</html>$
In Neutron metadata agent:
2014-09-18 14:44:37.563 ERROR neutron.agent.metadata.agent [-] Unexpected
error.
2014-09-18 14:44:37.563 TRACE neutron.agent.metadata.agent Traceback (most
recent call last):
2014-09-18 14:44:37.563 TRACE neutron.agent.metadata.agent File
"/opt/stack/neutron/neutron/agent/metadata/agent.py", line 130, in __call__
2014-09-18 14:44:37.563 TRACE neutron.agent.metadata.agent return
webob.exc.HTTPNotFound()
2014-09-18 14:44:37.563 TRACE neutron.agent.metadata.agent File
"/opt/stack/neutron/neutron/agent/metadata/agent.py", line 248, in
_proxy_request
2014-09-18 14:44:37.563 TRACE neutron.agent.metadata.agent def
_sign_instance_id(self, instance_id):
2014-09-18 14:44:37.563 TRACE neutron.agent.metadata.agent Exception:
Unexpected response code: 400
2014-09-18 14:44:37.563 TRACE neutron.agent.metadata.agent
2014-09-18 14:44:37.566 INFO eventlet.wsgi.server [-] 10.0.0.2,<local> - -
[18/Sep/2014 14:44:37] "GET /latest/meta-data/instance-id/i-00000001 HTTP/1.1"
500 229 0.348877
In Nova API service:
2014-09-18 14:31:19.030 ERROR nova.api.ec2
[req-5c84e0ae-7d18-4113-a08b-ed068e5333ed None None] FaultWrapper: string
indices must be integers, not unicode
2014-09-18 14:31:19.030 TRACE nova.api.ec2 Traceback (most recent call last):
2014-09-18 14:31:19.030 TRACE nova.api.ec2 File
"/opt/stack/nova/nova/api/ec2/__init__.py", line 87, in __call__
2014-09-18 14:31:19.030 TRACE nova.api.ec2 return
req.get_response(self.application)
2014-09-18 14:31:19.030 TRACE nova.api.ec2 File
"/usr/lib/python2.7/dist-packages/webob/request.py", line 1320, in send
2014-09-18 14:31:19.030 TRACE nova.api.ec2 application,
catch_exc_info=False)
2014-09-18 14:31:19.030 TRACE nova.api.ec2 File
"/usr/lib/python2.7/dist-packages/webob/request.py", line 1284, in
call_application
2014-09-18 14:31:19.030 TRACE nova.api.ec2 app_iter =
application(self.environ, start_response)
2014-09-18 14:31:19.030 TRACE nova.api.ec2 File
"/usr/lib/python2.7/dist-packages/webob/dec.py", line 130, in __call__
2014-09-18 14:31:19.030 TRACE nova.api.ec2 resp = self.call_func(req,
*args, **self.kwargs)
2014-09-18 14:31:19.030 TRACE nova.api.ec2 File
"/usr/lib/python2.7/dist-packages/webob/dec.py", line 195, in call_func
2014-09-18 14:31:19.030 TRACE nova.api.ec2 return self.func(req, *args,
**kwargs)
2014-09-18 14:31:19.030 TRACE nova.api.ec2 File
"/opt/stack/nova/nova/api/ec2/__init__.py", line 99, in __call__
2014-09-18 14:31:19.030 TRACE nova.api.ec2 rv =
req.get_response(self.application)
2014-09-18 14:31:19.030 TRACE nova.api.ec2 File
"/usr/lib/python2.7/dist-packages/webob/request.py", line 1320, in send
2014-09-18 14:31:19.030 TRACE nova.api.ec2 application,
catch_exc_info=False)
2014-09-18 14:31:19.030 TRACE nova.api.ec2 File
"/usr/lib/python2.7/dist-packages/webob/request.py", line 1284, in
call_application
2014-09-18 14:31:19.030 TRACE nova.api.ec2 app_iter =
application(self.environ, start_response)
2014-09-18 14:31:19.030 TRACE nova.api.ec2 File
"/usr/lib/python2.7/dist-packages/webob/dec.py", line 130, in __call__
2014-09-18 14:31:19.030 TRACE nova.api.ec2 resp = self.call_func(req,
*args, **self.kwargs)
2014-09-18 14:31:19.030 TRACE nova.api.ec2 File
"/usr/lib/python2.7/dist-packages/webob/dec.py", line 195, in call_func
2014-09-18 14:31:19.030 TRACE nova.api.ec2 return self.func(req, *args,
**kwargs)
2014-09-18 14:31:19.030 TRACE nova.api.ec2 File
"/opt/stack/nova/nova/api/metadata/handler.py", line 128, in __call__
2014-09-18 14:31:19.030 TRACE nova.api.ec2 data =
meta_data.lookup(req.path_info)
2014-09-18 14:31:19.030 TRACE nova.api.ec2 File
"/opt/stack/nova/nova/api/metadata/base.py", line 418, in lookup
2014-09-18 14:31:19.030 TRACE nova.api.ec2 data =
self.get_ec2_item(path_tokens[1:])
2014-09-18 14:31:19.030 TRACE nova.api.ec2 File
"/opt/stack/nova/nova/api/metadata/base.py", line 300, in get_ec2_item
2014-09-18 14:31:19.030 TRACE nova.api.ec2 return find_path_in_tree(data,
path_tokens[1:])
2014-09-18 14:31:19.030 TRACE nova.api.ec2 File
"/opt/stack/nova/nova/api/metadata/base.py", line 565, in find_path_in_tree
2014-09-18 14:31:19.030 TRACE nova.api.ec2 data = data[path_tokens[i]]
2014-09-18 14:31:19.030 TRACE nova.api.ec2 TypeError: string indices must be
integers, not unicode
2014-09-18 14:31:19.030 TRACE nova.api.ec2
2014-09-18 14:31:19.032 INFO nova.metadata.wsgi.server
[req-5c84e0ae-7d18-4113-a08b-ed068e5333ed None None] 10.0.0.2,172.18.76.77 "GET
/latest/meta-data/placement/availability-zone/nova HTTP/1.1" status: 400 len:
246 time: 0.5495760
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