v1.12.2

1.12.2 (2016-10-06)

IMPORTANT: Docker 1.12 ships with an updated systemd unit file for rpm
based installs (which includes RHEL, Fedora, CentOS, and Oracle Linux 7). When
upgrading from an older version of docker, the upgrade process may not
automatically install the updated version of the unit file, or fail to start
the docker service if;

• the systemd unit file (/usr/lib/systemd/system/docker.service) contains local changes, or
• a systemd drop-in file is present, and contains -H fd:// in the ExecStart directive

Starting the docker service will produce an error:

Failed to start docker.service: Unit docker.socket failed to load: No such file or directory.

or

no sockets found via socket activation: make sure the service was started by systemd.

To resolve this:

• Backup the current version of the unit file, and replace the file with the
  version that ships with docker 1.12
• Remove the Requires=docker.socket directive from the /usr/lib/systemd/system/docker.service file if present
• Remove -H fd:// from the ExecStart directive (both in the main unit file, and in any drop-in files present).

After making those changes, run sudo systemctl daemon-reload, and sudo systemctl restart docker to reload changes and (re)start the docker daemon.

Runtime

• Fix a panic due to a race condition filtering docker ps #26049
• Implement retry logic to prevent "Unable to remove filesystem" errors when using the aufs storage driver #26536
• Prevent devicemapper from removing device symlinks if dm.use_deferred_removal is enabled #24740
• Fix an issue where the CLI did not return correct exit codes if a command was run with invalid options #26777
• Fix a panic due to a bug in stdout / stderr processing in health checks #26507
• Fix exec's children handling #26874
• Fix exec form of HEALTHCHECK CMD #26208

Networking

• Fix a daemon start panic on armv5 #24315
• Vendor libnetwork #26879 #26953
  • Avoid returning early on agent join failures docker/libnetwork#1473
  • Fix service published port cleanup issues docker/libetwork#1432 docker/libnetwork#1433
  • Recover properly from transient gossip failures docker/libnetwork#1446
  • Disambiguate node names known to gossip cluster to avoid node name collision docker/libnetwork#1451
  • Honor user provided listen address for gossip docker/libnetwork#1460
  • Allow reachability via published port across services on the same host docker/libnetwork#1398
  • Change the ingress sandbox name from random id to just ingress_sbox docker/libnetwork#1449
• Disable service discovery in ingress network docker/libnetwork#1489

Swarm Mode

• Fix remote detection of a node's address when it joins the cluster #26211
• Vendor SwarmKit #26765
  • Bounce session after failed status update docker/swarmkit#1539
  • Fix possible raft deadlocks docker/swarmkit#1537
  • Fix panic and endpoint leak when a service is updated with no endpoints docker/swarmkit#1481
  • Produce an error if the same port is published twice on service create or service update docker/swarmkit#1495
  • Fix an issue where changes to a service were not detected, resulting in the service not being updated docker/swarmkit#1497
• Do not allow service creation on ingress network docker/swarmkit#1600

Contrib

• Update the debian sysv-init script to use dockerd instead of docker daemon #25869
• Improve stability when running the docker client on MacOS Sierra #26875

Windows

• Fix an issue where arrow-navigation did not work when running the docker client in ConEmu #25578

Downloads

Regular

deb/rpm install: curl -fsSL https://get.docker.com/ | sh
Linux 64bit tgz: https://get.docker.com/builds/Linux/x86_64/docker-1.12.2.tgz
Darwin/OSX 64bit client tgz: https://get.docker.com/builds/Darwin/x86_64/docker-1.12.2.tgz
Linux 64bit arm tgz: https://get.docker.com/builds/Linux/armel/docker-1.12.2.tgz
Windows 64bit zip: https://get.docker.com/builds/Windows/x86_64/docker-1.12.2.zip
Windows 32bit client zip: https://get.docker.com/builds/Windows/i386/docker-1.12.2.zip

With experimental features

deb/rpm install: curl -fsSL https://experimental.docker.com/ | sh
Linux 64bit tgz: https://experimental.docker.com/builds/Linux/x86_64/docker-1.12.2.tgz
Darwin/OSX 64bit client tgz: https://experimental.docker.com/builds/Darwin/x86_64/docker-1.12.2.tgz
Linux 64bit arm tgz: https://experimental.docker.com/builds/Linux/armel/docker-1.12.2.tgz
Windows 64bit zip: https://experimental.docker.com/builds/Windows/x86_64/docker-1.12.2.zip
Windows 32bit client zip: https://experimental.docker.com/builds/Windows/i386/docker-1.12.2.zip