1.12.0 (2016-07-28)

Builder

• New HEALTHCHECK Dockerfile instruction to support user-defined healthchecks #23218
• New SHELL Dockerfile instruction to specify the default shell when using the shell form for commands in a Dockerfile #22489
• Add #escape= Dockerfile directive to support platform-specific parsing of file paths in Dockerfile #22268
• Add support for comments in .dockerignore #23111
• Support for UTF-8 in Dockerfiles #23372
• Skip UTF-8 BOM bytes from Dockerfile and .dockerignore if exist #23234
• Windows: support for ARG to match Linux #22508
• Fix error message when building using a daemon with the bridge network disabled #22932

Contrib

• Enable seccomp for Centos 7 and Oracle Linux 7 #22344
• Remove MountFlags in systemd unit to allow shared mount propagation #22806

Distribution

• Add --max-concurrent-downloads and --max-concurrent-uploads daemon flags useful for situations where network connections don't support multiple downloads/uploads #22445
• Registry operations now honor the ALL_PROXY environment variable #22316
• Provide more information to the user on docker load #23377
• Always save registry digest metadata about images pushed and pulled #23996

Logging

• Syslog logging driver now supports DGRAM sockets #21613
• Add --details option to docker logs to also display log tags #21889
• Enable syslog logger to have access to env and labels #21724
• An additional syslog-format option rfc5424micro to allow microsecond resolution in syslog timestamp #21844
• Inherit the daemon log options when creating containers #21153
• Remove docker/ prefix from log messages tag and replace it with {{.DaemonName}} so that users have the option of changing the prefix #22384

Networking

• Built-in Virtual-IP based internal and ingress load-balancing using IPVS #23361
• Routing Mesh using ingress overlay network #23361
• Secured multi-host overlay networking using encrypted control-plane and Data-plane #23361
• MacVlan driver is out of experimental #23524
• Add driver filter to network ls #22319
• Adding network filter to docker ps --filter #23300
• Add --link-local-ip flag to create, run and network connect to specify a container's link-local address #23415
• Add network label filter support #21495
• Removed dependency on external KV-Store for Overlay networking in Swarm-Mode #23361
• Add container's short-id as default network alias #21901
• run options --dns and --net=host are no longer mutually exclusive #22408
• Fix DNS issue when renaming containers with generated names #22716
• Allow both network inspect -f {{.Id}} and network inspect -f {{.ID}} to address inconsistency with inspect output #23226

Plugins (experimental)

• New plugin command to manager plugins with install, enable, disable, rm, inspect, set subcommands #23446

Remote API (v1.24) & Client

• Split the binary into two: docker (client) and dockerd (daemon) #20639
• Add before and since filters to docker images --filter #22908
• Add --limit option to docker search #23107
• Add --filter option to docker search #22369
• Add security options to docker info output #21172 #23520
• Add insecure registries to docker info output #20410
• Extend Docker authorization with TLS user information #21556
• devicemapper: expose Mininum Thin Pool Free Space through docker info #21945
• API now returns a JSON object when an error occurs making it more consistent #22880
• Prevent docker run -i --restart from hanging on exit #22777
• Fix API/CLI discrepancy on hostname validation #21641
• Fix discrepancy in the format of sizes in stats from HumanSize to BytesSize #21773
• authz: when request is denied return forbbiden exit code (403) #22448
• Windows: fix tty-related displaying issues #23878

Runtime

• Add --live-restore daemon flag to keep containers running when daemon shuts down, and regain control on startup #23213
• Ability to add OCI-compatible runtimes (via --add-runtime daemon flag) and select one with --runtime on create and run #22983
• New overlay2 graphdriver for Linux 4.0+ with multiple lower directory support #22126
• New load/save image events #22137
• Add support for reloading daemon configuration through systemd #22446
• Add disk quota support for btrfs #19651
• Add disk quota support for zfs #21946
• Add support for docker run --pid=container:<id> #22481
• Align default seccomp profile with selected capabilities #22554
• Add a daemon reload event when the daemon reloads its configuration #22590
• Add trace capability in the pprof profiler to show execution traces in binary form #22715
• Add a detach event #22898
• Add support for setting sysctls with --sysctl #19265
• Add --storage-opt flag to create and run allowing to set size on devicemapper #19367
• Add --oom-score-adjust daemon flag with a default value of -500 making the daemon less likely to be killed before containers #24516
• Undeprecate the -c short alias of --cpu-shares on run, build, create, update #22621
• Prevent from using aufs and overlay graphdrivers on an eCryptfs mount #23121
• Fix issues with tmpfs mount ordering #22329
• Created containers are no longer listed on docker ps -a -f exited=0 #21947
• Fix an issue where containers are stuck in a "Removal In Progress" state #22423
• Fix bug that was returning an HTTP 500 instead of a 400 when not specifying a command on run/create #22762
• Fix bug with --detach-keys whereby input matching a prefix of the detach key was not preserved #22943
• SELinux labeling is now disabled when using --privileged mode #22993
• If volume-mounted into a container, /etc/hosts, /etc/resolv.conf, /etc/hostname are no longer SELinux-relabeled #22993
• Fix inconsistency in --tmpfs behavior regarding mount options #22438
• Fix an issue where daemon hangs at startup #23148
• Ignore SIGPIPE events to prevent journald restarts to crash docker in some cases #22460
• Containers are not removed from stats list on error #20835
• Fix on-failure restart policy when daemon restarts #20853
• Fix an issue with stats when a container is using another container's network #21904

Swarm Mode

• New swarm command to manage swarms with init, join, join-token, leave, update subcommands #23361 #24823
• New service command to manage swarm-wide services with create, inspect, update, rm, ps subcommands #23361 #25140
• New node command to manage nodes with accept, promote, demote, inspect, update, ps, ls and rm subcommands #23361 #25140
• (experimental) New stack and deploy commands to manage and deploy multi-service applications #23522 #25140

Volume

• Add support for local and global volume scopes (analogous to network scopes) #22077
• Allow volume drivers to provide a Status field #21006
• Add name/driver filter support for volume #21361
• Mount/Unmount operations now receives an opaque ID to allow volume drivers to differentiate between two callers #21015
• Fix issue preventing to remove a volume in a corner case #22103
• Windows: Enable auto-creation of host-path to match Linux #22094

DEPRECATION

• Environment variables DOCKER_CONTENT_TRUST_OFFLINE_PASSPHRASE and DOCKER_CONTENT_TRUST_TAGGING_PASSPHRASE have been renamed
  to DOCKER_CONTENT_TRUST_ROOT_PASSPHRASE and DOCKER_CONTENT_TRUST_REPOSITORY_PASSPHRASE respectively #22574
• Remove deprecated syslog-tag, gelf-tag, fluentd-tag log option in favor of the more generic tag one #22620
• Remove deprecated feature of passing HostConfig at API container start #22570
• Remove deprecated -f/--force flag on docker tag #23090
• Remove deprecated /containers/<id|name>/copy endpoint #22149
• Remove deprecated docker ps flags --since and --before #22138
• Deprecate the old 3-args form of docker import #23273

Downloads

Regular

deb/rpm install: curl -fsSL https://get.docker.com/ | sh
Linux 64bit tgz: https://get.docker.com/builds/Linux/x86_64/docker-1.12.0.tgz
Darwin/OSX 64bit client tgz: https://get.docker.com/builds/Darwin/x86_64/docker-1.12.0.tgz
Windows 64bit zip: https://get.docker.com/builds/Windows/x86_64/docker-1.12.0.zip
Windows 32bit client zip: https://get.docker.com/builds/Windows/i386/docker-1.12.0.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-1.12.0.tgz
Darwin/OSX 64bit client tgz: https://experimental.docker.com/builds/Darwin/x86_64/docker-1.12.0.tgz
Windows 64bit zip: https://experimental.docker.com/builds/Windows/x86_64/docker-1.12.0.zip
Windows 32bit client zip: https://experimental.docker.com/builds/Windows/i386/docker-1.12.0.zip