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[Scott Moser <smoser@xxxxxxxxxx>]

** Also affects: curtin (Ubuntu Yakkety)
   Importance: Undecided
       Status: New

** Changed in: curtin (Ubuntu Yakkety)
       Status: New => Confirmed

** Changed in: curtin (Ubuntu Xenial)
   Importance: Undecided => Medium

** Changed in: curtin (Ubuntu Yakkety)
   Importance: Undecided => Medium

** Changed in: curtin (Ubuntu)
   Importance: Undecided => Medium

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https://bugs.launchpad.net/bugs/1661337

Title:
  curtin does not retry when gpg fails to recv key

Status in curtin:
  Fix Committed
Status in curtin package in Ubuntu:
  Fix Released
Status in curtin source package in Xenial:
  Confirmed
Status in curtin source package in Yakkety:
  Confirmed

Bug description:
  ==== Begin SRU Template ========
  [Impact]
  Curtin installation can be configured to install additional apt
  repositories and import gpg keys from a remote keyserver by fingerprint.
  'gpg --recv' can transiently fail, causing installation failure.

  The fix is to just retry
    gpg --keyserver keyserver.ubuntu.com --recv <key>

  [Test Case]
  Run curtin vmtest on XenialTestAptSrcDisablePockets
   ./tools/jenkins-runner tests/vmtests/test_apt_source.py

  The named test pushes curtin through use of gpg --keyserver.
  It does not guarantee failure and re-try, but does test the
  happy path.  Even if the gpg server was available on the first
  time, we at very least then verify that there is no regression.

  [Regression Potential]
  Low risk of regression.  The code change is just to sleep and retry
  a command if it failed.

  ==== End   SRU Template ========

  In some cases we have transient network failure while attempting to
  recv gpg keys when configuring apt.

  https://jenkins.ubuntu.com/server/job/curtin-
  vmtest/737/artifact/output/XenialTestAptSrcDisablePockets/logs
  /install-serial.log

  [   40.161264] cloud-init[1528]: Command: ['gpg', '--keyserver', 'keyserver.ubuntu.com', '--recv', '0E72 9061 0D2F 6DC4 D65E  A921 9A31 4EC5 F470 A0AC']
  [   40.162213] cloud-init[1528]: Exit code: 2
  [   40.163711] cloud-init[1528]: Reason: -
  [   40.164256] cloud-init[1528]: Stdout: "gpgkeys: key 0E7290610D2F6DC4D65EA9219A314EC5F470A0AC can't be retrieved\n"
  [   40.174200] cloud-init[1528]: Stderr: 'gpg: requesting key F470A0AC from hkp server keyserver.ubuntu.com\ngpg: no valid OpenPGP data found.\ngpg: Total number processed: 0\ngpg: keyserver communications error: keyserver helper general error\ngpg: keyserver communications error: unknown pubkey algorithm\ngpg: keyserver receive failed: unknown pubkey algorithm\n'
  [   40.180654] cloud-init[1528]: During handling of the above exception, another exception occurred:
  [   40.182056] cloud-init[1528]: Traceback (most recent call last):
  [   40.183644] cloud-init[1528]:   File "/curtin/curtin/gpg.py", line 65, in getkeybyid
  [   40.185067] cloud-init[1528]:     recv_key(keyid, keyserver=keyserver)
  [   40.186653] cloud-init[1528]:   File "/curtin/curtin/gpg.py", line 48, in recv_key
  [   40.187895] cloud-init[1528]:     (key, keyserver, error))

  Curtin should retry this command.

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