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[Steve Langasek <steve.langasek@xxxxxxxxxxxxx>]

** Changed in: containerd (Ubuntu Xenial)
       Status: New => Fix Committed

** Changed in: containerd (Ubuntu)
       Status: New => Fix Released

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Matching subscriptions: Ubuntu 16.04 Bugs
https://bugs.launchpad.net/bugs/1574904

Title:
  Old clients cannot talk to Docker in 16.04

Status in containerd package in Ubuntu:
  Fix Released
Status in docker.io package in Ubuntu:
  Fix Released
Status in runc package in Ubuntu:
  Fix Released
Status in containerd source package in Xenial:
  Fix Committed
Status in docker.io source package in Xenial:
  Fix Committed
Status in runc source package in Xenial:
  Fix Committed

Bug description:
  [impact]
  The docker.io 1.10.3 packaged in Ubuntu 16.04 was compiled with Go[lang] 1.6.1.  Go 1.6.x contains a change to how the HTTP "Host" header is parsed, and using this to compile Docker has the effect of breaking the ability for any older version of the Docker client to talk to the daemon.

  It is proposed to fix this by uploading a new version of docker, which
  has been agreed to as an exception to the usual process by ~tech-board
  (although possibly this has not been documented anywhere yet). This
  also means updating the runc and containerd packages.

  [test case]
  Simply run:

  $ docker run -it -v /var/run/docker.sock:/var/run/docker.sock --rm
  docker:1.9 version

  it will fail with a problematic version installed and succeed with a
  fixed version installed.

  We should rebuild runc's reverse build-deps in xenial: golang-github-
  fsouza-go-dockerclient, gosu

  [regression potential]
  Obviously there is a risk of regressions here. But it is Ubuntu policy to offer an "upstream experience" with docker and not try to shield our users from that. The docker.io package in yakkety contains an autopkgtest that tests (very!) basic functionality, so we know the packages are not completely broken.

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