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[Bug 2015286] Re: update-manager unusable due to TimeoutError in uaclient

To: group.of.nepali.translators@xxxxxxxxxxxxxxxxxxx
From: Launchpad Bug Tracker <2015286@xxxxxxxxxxxxxxxxxx>
Date: Tue, 11 Jul 2023 01:44:37 -0000
Reply-to: Bug 2015286 <2015286@xxxxxxxxxxxxxxxxxx>
Sender: noreply@xxxxxxxxxxxxx
This bug was fixed in the package ubuntu-advantage-tools - 28.1~18.04

---------------
ubuntu-advantage-tools (28.1~18.04) bionic; urgency=medium

  * Backport new upstream release: (LP: #2017949) to bionic

ubuntu-advantage-tools (28.1) mantic; urgency=medium

  * New upstream release 28.1 (LP: #2017949)
    - fips: ensure shim-signed is updated to the version in the fips repo
      if necessary
    - status: fix bug where an existing status cache could influence the
      simulated status output

ubuntu-advantage-tools (28) mantic; urgency=medium

  * d/ubuntu-advantage-tools.postinst:
    - more specific regex for ua_config warning
  * d/source/lintian-overrides
    - adjust missing-build-dependency-for-dh-addon systemd override to work
      for the different but related error message on jammy onwards
  * New upstream release 28 (LP: #2017949)
    - api:
      + new endpoint: u.pro.status.is_attached.v1
      + new endpoint: u.pro.status.enabled_services.v1
    - apport: collect default log files if present for bug reports
    - apt messaging: add bionic-specific urls
    - auto-attach:
      + check for new Azure UBUNTU_PRO license on-boot of non-pro instances
      + exit 4 if attach succeeds but service enablement fails
    - cli:
      + avoid unnecessary network calls during autocomplete (GH: #2556)
      + warn users to not rely on human-readable output in scripts
    - config: no longer load uaclient.conf from current working directory
    - fix:
      + add support for --no-related flag
      + separate target USN from related USNs
    - general:
      + logs to user cache directory when run as non-root
      + fix bug where non-root commands failed with file permission error
        accessing /tmp/ubuntu-advantage (GH: #2567)
      + use system environment vars by default in sub processes (GH: #2527)
      + fall back to /usr/lib/os-release for release info
      + start logging to default log file until config is loaded
      + remove small timeout from contract checking request
      + avoid crashes when processing unicode text (LP: #2019729)
    - livepatch:
      + use uname.machine for kernel arch when checking support
        (GH: #2517)
      + display tailored warning messages for granular support statuses
    - realtime-kernel: add support for intel-iotg variant
    - reboot-required: new criteria for "yes-kernel-livepatches-applied"
      livepatch status must be either "applied" or "nothing-to-apply" and
      livepatch support status must say "supported"
    - security-status:
      + always show available/installed counts for esm packages
      + include hint to run apt-get update for up-to-date info (GH: #2443)
      + improve visibility of installed and available updates (GH: #2442)
      + change package info message hint to recommend apt-cache show
      + avoids unnecessary network calls (LP: #2015286, GH: #2536)
    - systemd: update service unit for reboot_cmds to not run if not attached
    - status:
      + add hint for pro status --all
      + better message if no services are available (LP: #1994923)
    - timer: only run timer when attached

 -- Grant Orndorff <grant.orndorff@xxxxxxxxxxxxx>  Mon, 26 Jun 2023
20:49:37 -0400

** Changed in: ubuntu-advantage-tools (Ubuntu Bionic)
       Status: Fix Committed => Fix Released

** Changed in: ubuntu-advantage-tools (Ubuntu Focal)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/2015286

Title:
  update-manager unusable due to TimeoutError in uaclient

Status in ubuntu-advantage-tools package in Ubuntu:
  Fix Released
Status in update-manager package in Ubuntu:
  Fix Released
Status in ubuntu-advantage-tools source package in Xenial:
  Fix Released
Status in ubuntu-advantage-tools source package in Bionic:
  Fix Released
Status in ubuntu-advantage-tools source package in Focal:
  Fix Released
Status in ubuntu-advantage-tools source package in Jammy:
  Fix Released
Status in ubuntu-advantage-tools source package in Kinetic:
  Fix Released
Status in ubuntu-advantage-tools source package in Lunar:
  Fix Released

Bug description:
  [ Impact ] 
  `pro api u.pro.packages.updates.v1` was making a network request to contracts.canonical.com to check for an updated list of available services. This could occasionally timeout or fail, causing issues for any program relying on it. The network request itself is unnecessary for the functionality of that api call, so the fix is to not make the network request anymore.

  [ Test Plan ]
  Recreate the bug:
  In a container
  ```
  truncate -s 0 /var/log/ubuntu-advantage.log
  pro api u.pro.packages.updates.v1
  cat /var/log/ubuntu-advantage.log
  # See logs about network requests
  ```
  To see the fix, install the new version (currently in staging PPA, but for SRU verification it will be in -proposed) and try again
  ```
  add-apt-repository ppa:ua-client/staging
  apt install ubuntu-advantage-tools
  truncate -s 0 /var/log/ubuntu-advantage.log
  pro api u.pro.packages.updates.v1
  cat /var/log/ubuntu-advantage.log
  # No logs about network requests
  ```

  [ Where problems could occur ] 
  This involves a refactor to the implementation of this API function. If there was an error, it could bubble up to any callers of the function.

  [ Original Description ]
  On a fairly standard installation of lunar (ie no Ubuntu Pro linked etc), the update-manager can become a non-functional window when uaclient isn't behaving. This manifests itself in a greyed-out 'checking for updates' window which doesn't respond to any clicks and can only be closed by ending the process in the system-monitor.

  Traceback (most recent call last):
    File "/usr/lib/python3/dist-packages/UpdateManager/backend/InstallBackendAptdaemon.py", line 529, in _on_finished
      self._action_done(
    File "/usr/lib/python3/dist-packages/UpdateManager/backend/__init__.py", line 414, in _action_done
      self.window_main.start_available()
    File "/usr/lib/python3/dist-packages/UpdateManager/UpdateManager.py", line 244, in start_available
      self.refresh_cache()
    File "/usr/lib/python3/dist-packages/UpdateManager/UpdateManager.py", line 456, in refresh_cache
      self._get_ua_security_status()
    File "/usr/lib/python3/dist-packages/UpdateManager/UpdateManager.py", line 280, in _get_ua_security_status
      update_result = updates()
                      ^^^^^^^^^
    File "/usr/lib/python3/dist-packages/uaclient/api/u/pro/packages/updates/v1.py", line 84, in updates
      return _updates(UAConfig())
             ^^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3/dist-packages/uaclient/api/u/pro/packages/updates/v1.py", line 88, in _updates
      ua_info = get_ua_info(cfg)
                ^^^^^^^^^^^^^^^^
    File "/usr/lib/python3/dist-packages/uaclient/security_status.py", line 195, in get_ua_info
      status_dict = status(cfg=cfg, show_all=True)
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3/dist-packages/uaclient/status.py", line 380, in status
      response = _unattached_status(cfg)
                 ^^^^^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3/dist-packages/uaclient/status.py", line 246, in _unattached_status
      resources = get_available_resources(cfg)
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3/dist-packages/uaclient/contract.py", line 624, in get_available_resources
      resources = client.request_resources()
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3/dist-packages/uaclient/contract.py", line 71, in request_resources
      resource_response, headers = self.request_url(
                                   ^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3/dist-packages/uaclient/serviceclient.py", line 73, in request_url
      response, headers = util.readurl(
                          ^^^^^^^^^^^^^
    File "/usr/lib/python3/dist-packages/uaclient/util.py", line 322, in readurl
      resp = request.urlopen(req, timeout=timeout)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3.11/urllib/request.py", line 216, in urlopen
      return opener.open(url, data, timeout)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3.11/urllib/request.py", line 519, in open
      response = self._open(req, data)
                 ^^^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3.11/urllib/request.py", line 536, in _open
      result = self._call_chain(self.handle_open, protocol, protocol +
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3.11/urllib/request.py", line 496, in _call_chain
      result = func(*args)
               ^^^^^^^^^^^
    File "/usr/lib/python3.11/urllib/request.py", line 1391, in https_open
      return self.do_open(http.client.HTTPSConnection, req,
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3.11/urllib/request.py", line 1352, in do_open
      r = h.getresponse()
          ^^^^^^^^^^^^^^^
    File "/usr/lib/python3.11/http/client.py", line 1374, in getresponse
      response.begin()
    File "/usr/lib/python3.11/http/client.py", line 318, in begin
      version, status, reason = self._read_status()
                                ^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3.11/http/client.py", line 279, in _read_status
      line = str(self.fp.readline(_MAXLINE + 1), "iso-8859-1")
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3.11/socket.py", line 706, in readinto
      return self._sock.recv_into(b)
             ^^^^^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3.11/ssl.py", line 1278, in recv_into
      return self.read(nbytes, buffer)
             ^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3.11/ssl.py", line 1134, in read
      return self._sslobj.read(len, buffer)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  TimeoutError: The read operation timed out

  In my opinion any misbehaving of the Ubuntu Pro integration in update-
  manager (in this specific case probably a 'temporary' server issue)
  shouldn't cause update-manager to become dysfunctional, especially to
  those not subscribed to Ubuntu Pro.

  I have recently seen:
  - update-manager unable to install updates for over a month ( LP: #2008280 )
  - this issue,
  - if you turn wi-fi off and open update-manager, then after clicking ok the update-manager window becomes unresponsive ( LP: #2015113 )
  - and undoubtedly there are others to come as this is all without uaclient needing to do anything (ie I have no subscription and lunar is not yet released)

  Please consider how you might make the integration of Ubuntu Pro into
  update-manager more robust, so that any issues in uaclient don't stop
  update-manager from functioning correctly. (ie presumably using a
  try/except around the uaclient call is not unreasonable - you might
  loose track of any errors that are occurring, but keeping update-
  manager working (aka allowing people to install their system updates)
  is a much higher priority)

  Thanks

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