Weave 0.11.0

Highlights:

• automatic IP Address Management
  (IPAM),
  which allows application containers to be started and attached to
  the weave network without needing to supply an IP address.
• proxy for
  automatically attaching containers started with ordinary docker run, or the Docker remote API, to the weave network.
• ability to add/remove extra DNS
  records.
• performance and scalability improvements
• fixes for a small number of bugs discovered during testing

More detail below and in the change log.

NB: This release changes the weave protocol version. Therefore, when upgrading an existing installation, all hosts need to be upgraded in order to for them to be able to communicate and form a network.

bug fixes

• eliminate a deadlock in route calculation, which could be
  encountered when large numbers of peers join or leave the weave
  network near-simultaneously. #643/#644
• prevent certain stray UDP packets from stalling the entire UDP
  receiver loop when crypto is in use. #564/#617
• prevent weave expose from breaking container connectivity in other
  subnets. #605/#628
• prevent weave expose from breaking subnet isolation. #620/#704
• fix breakage when running weave inside a container that has
  $PROCFS set. #621/#622
• fix bug in weave launch-dns that could result in some existing
  containers not being recorded in weaveDNS if one of them got stopped
  and removed during the weaveDNS launch. #690
• fix a dormant bug in the peer connection shutdown logic. #731

new features

• introduce automatic IP Address Management
  (IPAM),
  which allows application containers to be started and attached to
  the weave network without needing to supply an IP address. IPAM can
  also automatically allocate IP addresses for weave expose. #22/#563,#485,#567,#670,#679/#685,#672/#686,#671/#689,#669/#691,#681,#677/#693,#695.#692/#696,#684/#701,#705/#719,#723/#724
• introduce a
  proxy for
  automatically attaching containers started with ordinary docker run, or the Docker remote API, to the weave network. The proxy
  ensures that the weave network interface is available to application
  processes immediately on startup. It also allows application
  containers to be started in the foreground, and automatically
  removed on termination (with
  --rm). #47,#230,#251,#400,#652,#655,#698,#702,#703,#708/#713,#709/#714,#707/#718,#657/#721,#738
• add ability to add/remove extra DNS
  records. #364/#627
• publish docs for all releases; the main
  documentation now contain the docs for the
  latest release instead of the current development snapshot. #604,#612,#642,#648,#650,#729,#668/#722
• allow user to supply args to Docker in DOCKER_CLIENT_ARGS env var,
  for weave remote execution, eg. in order to enable TLS. #626
• enable weave script debugging with WEAVE_DEBUG env var. #618

other improvements

• significantly simplify
  crypto
  implementation. #608
• simplify and significantly improve performance of topology gossip,
  as a result of which weave can cope much better with situations
  where are large number of peers join or leave near- simultaneously,
  e.g. on startup of large clusters, or in the event of a network
  partition. #519/#619
• better error handling in a weave launch failure edge case. #600/#603
• prevent misleading error when attempting to weave detach from an
  unattached container. #596/#613
• make weave version cope with missing Docker images. #597/#614
• report errors encountered when populating DNS in weave launch-dns. #393
• report more descriptive error when weave was compiled against too
  old a version of libpcap. #623/#625
• return NXDOMAIN instead of NOTIMP for query types not handled by
  WeaveDNS, which is the expected response. #588/#589
• bump minimum Docker version requirement for use of --with-dns from
  1.2.0 to 1.3.1, due to the former not setting container hostnames
  correctly. #587
• bump minimum Linux kernel version requirement for running Weave from
  3.5.0 to 3.8.0, due to some bugs in namespace support in the
  former that break Weave. #585/#616
• remove a layer from the weaveexec image, thus reducing download
  times. #665
• various documentation cleanups and improvements. #601,#640,#651,#653,#667,#648,#740

improvements to tests, and refactoring

• add more smoke tests, improve existing tests, and make them more
  robust. #590,#591/#594,#595,#592/#606,#683,#712
• automatically run smoke tests on
  CircleCI. #624,#634,#637,#638
• make top-level vagrant provision idempotent. #586
• use nsenter instead of ip netns exec. #458/#580
• internal changes for future support of multiple DNS responses. #559
• some code cleanup in DNS. #609,#610
• refactor signal handling in Weave and WeaveDNS. #633