详情：https://github.com/docker/docker/releases/tag/v1.12.0-rc5
更新日志：
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
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
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
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:
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
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, leave, update subcommands#23361
New service command to manage swarm-wide services with create, inspect, update,remove, tasks subcommands #23361
New node command to manage nodes with accept, promote, demote, inspect, update,tasks, ls and rm subcommands #23361
(experimental) New stack and deploy commands to manage and deploy multi-service applications #23522
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 andDOCKER_CONTENT_TRUST_TAGGING_PASSPHRASE have been renamed toDOCKER_CONTENT_TRUST_ROOT_PASSPHRASE and DOCKER_CONTENT_TRUST_REPOSITORY_PASSPHRASErespectively #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/
Remove deprecated docker ps flags --since and --before #22138
Deprecate the old 3-args form of docker import #23273
下载地址：https://github.com/docker/docker/archive/v1.12.0-rc5.tar.gz
来自:开源中国社区