Reviewed: https://review.opendev.org/c/openstack/neutron/+/959687 Committed: https://opendev.org/openstack/neutron/commit/c031b59ec116db7c9d4c5e102e5cb7d274ae1975 Submitter: "Zuul (22348)" Branch: master
commit c031b59ec116db7c9d4c5e102e5cb7d274ae1975 Author: Rodolfo Alonso Hernandez <[email protected]> Date: Thu Sep 4 16:52:41 2025 +0000 Decode the metadata response before sending it to the VM The metadata server response can be encoded. The metadata proxy decodes it before crafting the HTTP message that will be delivered to the virtual machine. It requires that the HTTP message sent by the metadata server contains the proper "Context-Encoding" header, defining the encoding type used. This header is not provided by default (the content is not encoded) or is empty. NOTE: unless we provide a method to encode the Nova metadata server content, it would not be possible to properly test this patch. Closes-Bug: #2120723 Signed-off-by: Rodolfo Alonso Hernandez <[email protected]> Change-Id: I747872f031cc5a1a87ced69bb0af645c088143f3 ** Changed in: neutron Status: In Progress => Fix Released -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to neutron. https://bugs.launchpad.net/bugs/2120723 Title: [OVN] Metadata agent errors when returning gzip-encoded data Status in neutron: Fix Released Bug description: In 2025.1 (deployed with OpenStack-Ansible 31.0.0), when requesting the user_data for an instance that is gzip-encoded, the client gets a 502 Bad Gateway response. This worked previously in our 2024.2 deployment (and rolling back just the neutron-ovn-metadata-agent to 2024.2 fixes the issue). This is the error found in the neutron-ovn-metadata-agent logs: 2025-08-15 14:20:07.225 657820 ERROR neutron.agent.ovn.metadata.server_socket [-] Error while receiving data.: UnicodeDecodeError: 'utf-8' codec can't decode byte 0x8b in position 1: invalid start byte 2025-08-15 14:20:07.225 657820 ERROR neutron.agent.ovn.metadata.server_socket Traceback (most recent call last): 2025-08-15 14:20:07.225 657820 ERROR neutron.agent.ovn.metadata.server_socket File "/openstack/venvs/neutron-31.0.0/lib/python3.11/site-packages/neutron/agent/ovn/metadata/server_socket.py", line 144, in handle 2025-08-15 14:20:07.225 657820 ERROR neutron.agent.ovn.metadata.server_socket res = self._proxy_request(instance_id, project_id, req) 2025-08-15 14:20:07.225 657820 ERROR neutron.agent.ovn.metadata.server_socket ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 2025-08-15 14:20:07.225 657820 ERROR neutron.agent.ovn.metadata.server_socket File "/openstack/venvs/neutron-31.0.0/lib/python3.11/site-packages/neutron/agent/ovn/metadata/server_socket.py", line 103, in _proxy_request 2025-08-15 14:20:07.225 657820 ERROR neutron.agent.ovn.metadata.server_socket return self._http_response(resp, req) 2025-08-15 14:20:07.225 657820 ERROR neutron.agent.ovn.metadata.server_socket ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 2025-08-15 14:20:07.225 657820 ERROR neutron.agent.ovn.metadata.server_socket File "/openstack/venvs/neutron-31.0.0/lib/python3.11/site-packages/neutron/agent/ovn/metadata/server_socket.py", line 49, in _http_response 2025-08-15 14:20:07.225 657820 ERROR neutron.agent.ovn.metadata.server_socket out = request.http_version + ' ' + str(_res) 2025-08-15 14:20:07.225 657820 ERROR neutron.agent.ovn.metadata.server_socket ^^^^^^^^^ 2025-08-15 14:20:07.225 657820 ERROR neutron.agent.ovn.metadata.server_socket File "/openstack/venvs/neutron-31.0.0/lib/python3.11/site-packages/webob/response.py", line 403, in __str__ 2025-08-15 14:20:07.225 657820 ERROR neutron.agent.ovn.metadata.server_socket parts += ['', self.body if PY2 else self.text] 2025-08-15 14:20:07.225 657820 ERROR neutron.agent.ovn.metadata.server_socket ^^^^^^^^^ 2025-08-15 14:20:07.225 657820 ERROR neutron.agent.ovn.metadata.server_socket File "/openstack/venvs/neutron-31.0.0/lib/python3.11/site-packages/webob/response.py", line 622, in _text__get 2025-08-15 14:20:07.225 657820 ERROR neutron.agent.ovn.metadata.server_socket return body.decode(decoding, self.unicode_errors) 2025-08-15 14:20:07.225 657820 ERROR neutron.agent.ovn.metadata.server_socket ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 2025-08-15 14:20:07.225 657820 ERROR neutron.agent.ovn.metadata.server_socket UnicodeDecodeError: 'utf-8' codec can't decode byte 0x8b in position 1: invalid start byte 2025-08-15 14:20:07.225 657820 ERROR neutron.agent.ovn.metadata.server_socket ---------------------------------------- Exception occurred during processing of request from Traceback (most recent call last): File "/usr/lib/python3.11/socketserver.py", line 691, in process_request_thread self.finish_request(request, client_address) File "/usr/lib/python3.11/socketserver.py", line 361, in finish_request self.RequestHandlerClass(request, client_address, self) File "/openstack/venvs/neutron-31.0.0/lib/python3.11/site-packages/neutron/agent/ovn/metadata/server_socket.py", line 133, in __init__ super().__init__(self._conf, has_cache=False, request=request, File "/openstack/venvs/neutron-31.0.0/lib/python3.11/site-packages/neutron/agent/metadata/proxy_base.py", line 48, in __init__ super().__init__(**kwargs) File "/usr/lib/python3.11/socketserver.py", line 755, in __init__ self.handle() File "/openstack/venvs/neutron-31.0.0/lib/python3.11/site-packages/neutron/agent/ovn/metadata/server_socket.py", line 165, in handle raise exc File "/openstack/venvs/neutron-31.0.0/lib/python3.11/site-packages/neutron/agent/ovn/metadata/server_socket.py", line 144, in handle res = self._proxy_request(instance_id, project_id, req) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/openstack/venvs/neutron-31.0.0/lib/python3.11/site-packages/neutron/agent/ovn/metadata/server_socket.py", line 103, in _proxy_request return self._http_response(resp, req) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/openstack/venvs/neutron-31.0.0/lib/python3.11/site-packages/neutron/agent/ovn/metadata/server_socket.py", line 49, in _http_response out = request.http_version + ' ' + str(_res) ^^^^^^^^^ File "/openstack/venvs/neutron-31.0.0/lib/python3.11/site-packages/webob/response.py", line 403, in __str__ parts += ['', self.body if PY2 else self.text] ^^^^^^^^^ File "/openstack/venvs/neutron-31.0.0/lib/python3.11/site-packages/webob/response.py", line 622, in _text__get return body.decode(decoding, self.unicode_errors) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ UnicodeDecodeError: 'utf-8' codec can't decode byte 0x8b in position 1: invalid start byte 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