Here's a demo of adding a timeout. I'm not sure if this has to be done
in the simplestreams library or if it can somehow be set by a caller:
$ diff -u /usr/lib/python3/dist-packages/simplestreams/contentsource.py.orig
/usr/lib/python3/dist-packages/simplestreams/contentsource.py
--- /usr/lib/python3/dist-packages/simplestreams/contentsource.py.orig
2021-01-29 21:39:55.695029811 +0000
+++ /usr/lib/python3/dist-packages/simplestreams/contentsource.py
2021-01-29 21:40:57.327987600 +0000
@@ -378,7 +378,7 @@
if headers == {}:
headers = None
- self.req = requests.get(url, stream=True, auth=auth, headers=headers)
+ self.req = requests.get(url, stream=True, auth=auth, headers=headers,
timeout=10)
self.r_iter = None
if buflen is None:
buflen = READ_BUFFER_SIZE
------------------
$ ./repro.py
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/urllib3/contrib/pyopenssl.py", line 485,
in wrap_socket
cnx.do_handshake()
File "/usr/lib/python3/dist-packages/OpenSSL/SSL.py", line 1915, in
do_handshake
self._raise_ssl_error(self._ssl, result)
File "/usr/lib/python3/dist-packages/OpenSSL/SSL.py", line 1622, in
_raise_ssl_error
raise WantReadError()
OpenSSL.SSL.WantReadError
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 376, in
_make_request
self._validate_conn(conn)
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 996, in
_validate_conn
conn.connect()
File "/usr/lib/python3/dist-packages/urllib3/connection.py", line 366, in
connect
self.sock = ssl_wrap_socket(
File "/usr/lib/python3/dist-packages/urllib3/util/ssl_.py", line 370, in
ssl_wrap_socket
return context.wrap_socket(sock, server_hostname=server_hostname)
File "/usr/lib/python3/dist-packages/urllib3/contrib/pyopenssl.py", line 488,
in wrap_socket
raise timeout("select timed out")
socket.timeout: select timed out
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/requests/adapters.py", line 439, in send
resp = conn.urlopen(
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 719, in
urlopen
retries = retries.increment(
File "/usr/lib/python3/dist-packages/urllib3/util/retry.py", line 400, in
increment
raise six.reraise(type(error), error, _stacktrace)
File "/usr/lib/python3/dist-packages/six.py", line 703, in reraise
raise value
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 665, in
urlopen
httplib_response = self._make_request(
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 379, in
_make_request
self._raise_timeout(err=e, url=url, timeout_value=conn.timeout)
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 330, in
_raise_timeout
raise ReadTimeoutError(
urllib3.exceptions.ReadTimeoutError: HTTPSConnectionPool(host='images.maas.io',
port=443): Read timed out. (read timeout=10)
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "./repro.py", line 8, in <module>
r = RequestsUrlReader(url)
File "/usr/lib/python3/dist-packages/simplestreams/contentsource.py", line
381, in __init__
self.req = requests.get(url, stream=True, auth=auth, headers=headers,
timeout=10)
File "/usr/lib/python3/dist-packages/requests/api.py", line 75, in get
return request('get', url, params=params, **kwargs)
File "/usr/lib/python3/dist-packages/requests/api.py", line 60, in request
return session.request(method=method, url=url, **kwargs)
File "/usr/lib/python3/dist-packages/requests/sessions.py", line 533, in
request
resp = self.send(prep, **send_kwargs)
File "/usr/lib/python3/dist-packages/requests/sessions.py", line 646, in send
r = adapter.send(request, **kwargs)
File "/usr/lib/python3/dist-packages/requests/adapters.py", line 529, in send
raise ReadTimeout(e, request=request)
requests.exceptions.ReadTimeout: HTTPSConnectionPool(host='images.maas.io',
port=443): Read timed out. (read timeout=10)
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1908452
Title:
MAAS stops working and deployment fails after `Loading ephemeral` step
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https://bugs.launchpad.net/maas/+bug/1908452/+subscriptions
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