Rocket 0.15.0 發布，支持 Go 1.5
Rocket （也叫 rkt）是 CoreOS 推出的一款容器引擎，和 Docker 類似，幫助開發者打包應用和依賴包到可移植容器中，簡化搭環境等部署工作。Rocket 和 Docker 不同的地方在于，Rocket 沒有 Docker 那些為企業用戶提供的“友好功能”，比如云服務加速工具、集群系統等。反過來說，Rocket 想做的，是一個更純粹的業界標準。
CoreOS 把它的容器稱為 App Containers，里面包含 app container image、runtime、container-discovery 協議等。其中，App Container Image 和 Docker 里的 Image 比較類似，包含應用必需的元素組成，如源代碼和二進制文件。Rocket runtime 則是依照 App Container 標準規格打造的，旨在將容器真正的變成一款命令行工具。
rkt v0.15.0 是個增長版本，包括 UX 改進，bug 修復，API 服務增強和對 Go 1.5 的支持。
新特性和 UX 改進：
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Images can now be deleted from the store by both ID and name (#1866). See rkt's rkt image rm documentation.
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The journals of rkt pods can now be accessed by members of the Unix group rkt (#1877). See rkt's journalctl -M documentation.
文檔改進：
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Mention rkt integration in Nomad (#1884).
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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 服務
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Programs using rkt's API service are now provided with the size of the images stored in rkt's store (#1916).
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Programs using rkt's API service are now provided with any annotations found in the image manifest and pod manifest (#1924).
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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).
構建改進：
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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).
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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 修復：
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Fix regression issue when downloading image signatures from quay.io (#1909).
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Properly cleanup the tap network interface that were not cleaned up in some error cases when using the kvm stage1 (#1921).
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Fix a bug in the 9p filesystem used by the kvm stage1 that were preventingapt-getfrom working propertly (#1918).
來自： http://www.oschina.net/news/69725/rocket-0-15-0