CoreOS 的容器引擎 rkt v1.21.0 发布了。此版本包括实验性 CRI 支持的错误修复，更稳定的集成测试和一些其他有趣的更改：

• 默认受限网络从 172.16.28.0/24 更改为 172.17.0.0/26

• OCI 支持的详细路线图已经完成

新特性

• Change the subnet for the default-restricted network (#3440), (#3459).

• Prepare for writable /proc/sys, and /sys (#3389).

• Documentation/proposals: add OCI Image Format roadmap (#3425).

Bug 修复

• stage1: app add, status didn't work with empty vols (#3451).

• stage1: properly run defer'd umounts in app add (#3455).

• cri: correct 'created' timestamp (#3399).

• fly: ensure the target bin directory exists before building (#3436).

• rkt: misc systemd-related fixes (#3418).

其他变更

• pkg/mountinfo: move mountinfo parser to its own package (#3415).

• stage1: persist runtime parameters (#3432), (#3450).

• stage1: signal supervisor readiness (#3424), (#3439).

• sandbox: add missing flagDNSDomain and flagHostsEntries parameters (#3430).

• pkg/tar: fix variable name in error (#3433).

• tests: fix TestExport for the KVM+overlay case (#3435).

• tests: fix some potential gexpect hangs (#3443).

• tests: add smoke test for app sandbox (#3371).

• tests: tentative fixes for sporadic host and kvm failures (#3434).

• rkt: remove empty TODO (#3417).

• Documentation updates: #3446, (#3421), (#3412).

发布主页和完整更新日志

下载地址：

• https://github.com/coreos/rkt/releases/tag/v1.21.0