Rocket 0.15.0 发布支持 Go 1.5

rkt v0.15.0 是个增长版本，包括 UX 改进，bug 修复，API 服务增强和对 Go 1.5 的支持。

新特性和 UX 改进：

Images can now be deleted from the store by both ID and name (#1866). See rkt’s rkt image rm documentation.
The journals of rkt pods can now be accessed by members of the Unix group rkt (#1877). See rkt’s journalctl -M documentation.

文档改进：

Mention rkt integration in Nomad (#1884).
Document how to start the api service and add a program example explaining how the api service can be used to integrate rkt with other programs (#1915).

API 服务

Programs using rkt’s API service are now provided with the size of the images stored in rkt’s store (#1916).
Programs using rkt’s API service are now provided with any annotations found in the image manifest and pod manifest (#1924).
Fix a panic in the API service by making the store database thread-safe (#1892) and by refactoring the API service functions to get the pod state (#1893).

构建改进：

Add support for building rkt with Go 1.5, which is now the preferred version. rkt can still be built with Go 1.4 as best effort (#1907). As part of the move to Go 1.5, rkt now has a godep-save script to support Go 1.5 (#1857).
Continuous Integration on Travis now builds with both Go 1.4.2 and Go 1.5.2. Go 1.4.3 is avoided to workaround recent problems with go vet (#1941).

Bug 修复：

Fix regression issue when downloading image signatures from quay.io (#1909).
Properly cleanup the tap network interface that were not cleaned up in some error cases when using the kvm stage1 (#1921).
Fix a bug in the 9p filesystem used by the kvm stage1 that were preventing apt-get from working propertly (#1918).

下载：rkt-v0.15.0.tar.gz

Rocket （也叫 rkt）是 CoreOS 推出的一款容器引擎，和 Docker 类似，帮助开发者打包应用和依赖包到可移植容器中，简化搭环境等部署工作。Rocket 和 Docker 不同的地方在于，Rocket 没有 Docker 那些为企业用户提供的“友好功能”，比如云服务加速工具、集群系统等。反过来说，Rocket 想做的，是一个更纯粹的业界标准。

CoreOS 把它的容器称为 App Containers，里面包含 app container image、runtime、container-discovery 协议等。其中，App Container Image 和 Docker 里的 Image 比较类似，包含应用必需的元素组成，如源代码和二进制文件。Rocket runtime 则是依照 App Container 标准规格打造的，旨在将容器真正的变成一款命令行工具。