CoreOS 的容器引擎，Rocket 0.8.1 發布

jopen 9年前發布 | 5K 次閱讀 Rocket

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。    

Rocket 0.8.1 發布，更新內容如下：

該版本一些重大的 UX 變化：

  • Arguments can now be passed through to CNI plugins on the command line - see the networking documentation for details

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  • The default metadata service port has been changed from 2375 (which had an unfortunate conflict with an IANA registered/reserved port) to an arbitrary non-registered port, 18112

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  • The APPNAME field in the output of rkt image list has been changed to the more accurate NAME

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  • rkt rm now supports a variable number of arguments, allowing the removal of multiple pods simultaneously

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    完整的更新列表:

    • New features and UX changes:

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      • rkt rm is now variadic: it can now remove multiple pods in one command, by UUID

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      • The APPNAME column in rkt image list output has been changed to the more accurate NAME. This involves a schema change in rkt's on-disk datastore, but this should be upgraded transparently.

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      • Headers are now sent when following HTTP redirects while trying to retrieve an image

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      • The default metadata service port number was changed from a registered/reserved IANA port to an arbitrary port in the non-dynamic range

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      • Added the ability to override arguments for network plugins

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      • rkt will now error out if someone attempts to use --private-users with the lkvm backend

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      • Bug fixes:

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        • Fixed creation of /tmp in apps' root filesystems with correct permissions

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        • Fixed garbage collection after umounts (for example, if a system reboots before a pod is cleanly destroyed)

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        • Fixed a race in interactive mode when using the lkvm backend that could cause a deadlock or segfault

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        • Fixed bad parameter being passed to the metadata service ("uid" -> "uuid")

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        • Fixed setting of file permissions during stage1 set up

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        • Fixed a potential race condition during simultaneous iptables invocation

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        • Fixed ACI download progress being sent to stderr instead of stdout, now consistent with the output during retrieval of Docker images

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        • rkt help prepare will now show the correct default stage1 image

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        • rkt will refuse to add isolators with nil Limits, preventing a panic caused by an ambiguity in upstream appc schema

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        • Other changes:

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          • Reworked the SELinux implementation to use systemd-nspawn's native context-switching feature

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          • Added a workaround for a bug in Docker <1.8 when it is run on the same system as rkt (see #1210 (comment))

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          • Added a rkt-xxxx-tapN name to tap devices that rkt creates

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          • Functional tests now clean intermediate images between tests

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          • Countless improvements and cleanup to the build system

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          • Numerous documentation improvements, including splitting out all top-level rkt subcommands into their own documents

            </li> </ul> </ul>

            下載頁面：v0.8.1

            來自：http://www.oschina.net/news/66250/rocket-0-8-1

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