Public bug reported:
When calling the CloudKitty API using victoria release I get the
following error:
```
(openstack) [stack@cranky ~]$ cloudkitty module list
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>500 Internal Server Error</title>
</head><body>
<h1>Internal Server Error</h1>
<p>The server encountered an internal error or
misconfiguration and was unable to complete
your request.</p>
<p>Please contact the server administrator at
root@localhost to inform them of the time this error occurred,
and the actions you performed just before this error.</p>
<p>More information about this error may be available
in the server error log.</p>
</body></html>
(HTTP 500)
```
In the logs I see:
```
==> cloudkitty-api-error.log <==
[Fri Mar 05 15:47:56.212556 2021] [wsgi:error] [pid 29:tid 139710101341952]
[remote 10.103.1.12:50752] return self.object_type.invoke(self)
[Fri Mar 05 15:47:56.212563 2021] [wsgi:error] [pid 29:tid 139710101341952]
[remote 10.103.1.12:50752] File
"/var/lib/kolla/venv/lib/python3.6/site-packages
/paste/deploy/loadwsgi.py", line 152, in invoke
[Fri Mar 05 15:47:56.212572 2021] [wsgi:error] [pid 29:tid 139710101341952]
[remote 10.103.1.12:50752] return fix_call(context.object,
context.global_conf
, **context.local_conf)
[Fri Mar 05 15:47:56.212581 2021] [wsgi:error] [pid 29:tid 139710101341952]
[remote 10.103.1.12:50752] File
"/var/lib/kolla/venv/lib/python3.6/site-packages
/paste/deploy/util.py", line 55, in fix_call
[Fri Mar 05 15:47:56.212585 2021] [wsgi:error] [pid 29:tid 139710101341952]
[remote 10.103.1.12:50752] val = callable(*args, **kw)
[Fri Mar 05 15:47:56.212595 2021] [wsgi:error] [pid 29:tid 139710101341952]
[remote 10.103.1.12:50752] File
"/var/lib/kolla/venv/lib/python3.6/site-packages
/cloudkitty/api/app.py", line 99, in app_factory
[Fri Mar 05 15:47:56.212604 2021] [wsgi:error] [pid 29:tid 139710101341952]
[remote 10.103.1.12:50752] return setup_app()
[Fri Mar 05 15:47:56.212611 2021] [wsgi:error] [pid 29:tid 139710101341952]
[remote 10.103.1.12:50752] File
"/var/lib/kolla/venv/lib/python3.6/site-packages
/cloudkitty/api/app.py", line 72, in setup_app
[Fri Mar 05 15:47:56.212616 2021] [wsgi:error] [pid 29:tid 139710101341952]
[remote 10.103.1.12:50752] app = wsgi.DispatcherMiddleware(root_app,
dispatch_
dict)
[Fri Mar 05 15:47:56.212639 2021] [wsgi:error] [pid 29:tid 139710101341952]
[remote 10.103.1.12:50752] AttributeError: module 'werkzeug.wsgi' has no
attribute
'DispatcherMiddleware'
```
I can fix this by changing the way that DispatcherMiddleware is
imported.
I see that Werkzeug==1.0.1 is installed, according to upper constraints:
https://github.com/openstack/requirements/blob/stable/victoria/upper-constraints.txt
If I downgrade Werkzeug to 0.16.0, the DispatcherMiddleware is loaded:
```
(openstack) [stack@cranky ~]$ cloudkitty module list
+-----------+---------+----------+
| Module | Enabled | Priority |
+-----------+---------+----------+
| hashmap | False | 1 |
| noop | True | 1 |
| pyscripts | False | 1 |
```
The regression appears to have occurred with the 0.16.1 release of
Werkzeug (used in Ussuri onwards).
** Affects: cloudkitty (Ubuntu)
Importance: Undecided
Status: Invalid
** Bug watch added: github.com/pallets/werkzeug/issues #1663
https://github.com/pallets/werkzeug/issues/1663
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https://bugs.launchpad.net/bugs/1917911
Title:
module 'werkzeug.wsgi' has no attribute 'DispatcherMiddleware'
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