ã³ã³ãããçãä¸ãã£ã¦ãã®ã§ãã¨ã©ã人ãã¡ãçµæ§è²ã ãªæ å ±ãè²ã ãªæã«æ¸ãã¦ãããã®ã§ãç°¡åã«ç¥èãæã«å ¥ãããã«ãªã£ã¦ãã¾ããããã¨ããããã§ãç§ã®ãããªãªãã¡ãã£ã¦ãªäººã§ãæ°è»½ã«å¦çã追ã£ããããã¨ãã§ããããã«ãªã£ã¦ãã¾ãããããä¹ ã ã«ã«ã¼ãã«ã®ã³ã¼ããèªãã§ã¿ã¾ãããã¨ããã¡ã¢ã(ã¡ããã¨ããç¥èãæã«å ¥ããã«ã¯ãã£ã¨åã人ã®è³æãåèã«èªåã§ãã£ããã¦ã¿ã¾ããã :-) Namespace ã®ä¸ã§ãä¸çªåç´ãã㪠UTS Namespaceãããã§ãããã®ãã¹ãåã¨ããã¡ã¤ã³åã¨ãããã®è¾ºãã Namespace ãã¨ã«ä¿æã§ããã·ã³ãã«ãª Namespace ã§ãããããªãã·ãã¼ããªç§ã§ã大ä¸å¤«ããã nsproxy ã¿ã¹ã¯ãã¨ã® Namespace ãä¿æããããã«ãããã»ã¹ãªããã®è²ã ãªæ å ±ãä¿æãã task_struct æ§é ä½ã¨ããã®ã include/linux/s
(2016-07-26: 誤è¨ä¿®æ£ãã¾ãã "setns -> nsenter") ãæ軽ã«ã·ã§ã«ã¹ã¯ãªãããªããã§ã³ã³ãããä½ãå ´åã®å¼·ãå³æ¹ã¨ããã° util-linux ã® unshare/nsenter ã³ãã³ã iproute2 ã® ip netns ã³ãã³ã ã代表çã§ãããã"ip netns" 㯠Network Namespace ä½ã£ã¦ã³ãã³ãå®è¡ããã ãã®åç´ãªã³ãã³ããã¨æã£ãããä¸ã§ã¯æå¤ã«è²ã ç´°ãããã£ã¦ããã¦ãããã¨ãããã£ãã®ã§ã¡ãã£ã¨ç´¹ä»ãã¦ããã¾ãã 以ä¸ã¯ iproute2 4.2.0 ã§è©¦ãã¦ãã¾ãã /var/run/netns ã¾ãããç¥ããã¦ããã®ã /var/run/netns 以ä¸ã« Namespace åã®ãã¡ã¤ã«ãä½ã£ã¦ããããã¨ã§ãããããã¯ãNamespace å ã§åãã¦ããããã»ã¹ããªããªã£ãã Namespace ãæ¶æ» ãã¦ãã
Introduction to Linux namespaces - Part 2: IPC | Yet another enthusiast blog! ããããããã°è¨äºããã£ã¦ãå è¨äºã¯Cè¨èªãªãã ãã©ãããã¨åããã¨ãmrubyã§ããã£ã¦ã¿ããµã³ãã«ããªãå è¨äºã¯ clone(2) ã ãã©ä»åã¯forkãã¦ãã unshare(2) ãã¦ãããcloneæªå®è£ ãªãã§ãã reader, writer = IO.pipe puts " - Hello ?" p = Process.fork do Namespace.unshare(Namespace::CLONE_NEWUTS | Namespace::CLONE_NEWIPC) writer.close reader.read # blocking system "hostname 'In-Namespace'" puts " -
Firejail is a SUID program that reduces the risk of security breaches by restricting the running environment of untrusted applications using Linux namespaces and seccomp-bpf. It allows a process and all its descendants to have their own private view of the globally shared kernel resources, such as the network stack, process table, mount table. Written in C with virtually no dependencies, the softw
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