Docker v1.12.0-rc1 发布了，更新如下：

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

Contrib

• 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

• 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

• Add driver filter to network ls #22319

• Adding network filter to docker ps --filter #23300

• 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

• Add --link-local-ip flag to create, run and network connect to specify a container's link-local address #23415

Plugins (experimental)

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

Remote API (v1.24)

• Add before and since filters to docker images --filter #22908

• Add --limit option to docker search #23107

• Add --filter option to docker search #22369

• 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

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

• 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

Volume

• Add support for local and global volume scopes (analogous to network scopes) #22077

• 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

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/<id|name>/copy endpoint #22149

• Deprecate the old 3-args form of docker import #23273

下载：

deb/rpm install: curl -fsSL https://test.docker.com/ | sh
Linux 64bit tgz: https://test.docker.com/builds/Linux/x86_64/docker-1.12.0-rc1.tgz
Darwin/OSX 64bit client tgz: https://test.docker.com/builds/Darwin/x86_64/docker-1.12.0-rc1.tgz
Windows 64bit zip: https://test.docker.com/builds/Windows/x86_64/docker-1.12.0-rc1.zip
Windows 32bit client zip: https://test.docker.com/builds/Windows/i386/docker-1.12.0-rc1.zip

下载地址：

• Source code (zip)

• Source code (tar.gz)