CoreOS 容器引擎，Rocket 0.16.0 发布

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。

Rocket 0.14.0 发布，主要更新如下：

新特性和 UX 变更

• Explicitly allow http connections via a new 'http' option to --insecure-options ( #1945 ). Any data and credentials will be sent in the clear.

• When using bash , rkt commands can be auto-completed ( #1955 ).

• The executables given on the command line via the --exec parameters don't need to be absolute paths anymore ( #1953 ). This change reflects an update in the appc spec since v0.7.2 . See rkt's rkt run --exec documentation.

• Add a --full flag to rkt fetch so it returns full hash of the image ( #1976 ).

• There is a new global flag for specifying the user configuration directory, --user-config . It overrides whatever is configured in system and local configuration directories. It can be useful for specifying different credentials for fetching images without putting them in a globally visible directory like /etc/rkt . See rkt's Global Options documentation ( #1981 ).

• As a temporary fix, search for network plugins in the local configuration directory too ( #2005 ).

• Pass the environment defined in the image manifest to the application when using the fly stage1 image ( #1989 ).

Build 改进

• Fix vagrant rkt build ( #1960 ).

• Switch to using unrewritten imports, this will allow rkt packages to be cleanly vendored by other projects ( #2014 ).

API service

• Allow filtering images by name ( #1985 ).

Bug 修复

• Fix bug where the wrong image signature was checked when using dependencies ( #1991 ).

测试改进

• A new script to run test on AWS makes it easier to test under several distributions: CentOS, Debian, Fedora, Ubuntu ( #1925 ).

• The functional tests now skip user namespace tests when user namespaces do not work ( #1947 ).

• Check that rkt is not built with go 1.5.{0,1,2} to make sure it's not vulnerable to CVE-2015-8618 ( #2006 ).

Other changes

• Cleanups in the kvm stage1 ( #1895 ).

• Document stage1 filesystem layout for developers ( #1832 ).

Note for packagers

With this release, rkt RPM/dpkg packages should have the following updates:

• Install the new file dist/bash_completion/rkt.bash in /etc/bash_completion.d/ .

下载页面： 0.16.0

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。