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 rkt v1.21.0 发布，CoreOS 的容器引擎下载地址
