{"id":32,"date":"2024-11-16T19:40:01","date_gmt":"2024-11-16T11:40:01","guid":{"rendered":"http:\/\/www.oldjiang.top\/?p=32"},"modified":"2024-11-16T19:40:01","modified_gmt":"2024-11-16T11:40:01","slug":"%e6%b5%85%e8%b0%88linux-namespace%e6%9c%ba%e5%88%b6%ef%bc%88%e4%b8%80%ef%bc%89","status":"publish","type":"post","link":"http:\/\/www.oldjiang.top\/?p=32","title":{"rendered":"\u6d45\u8c08Linux Namespace\u673a\u5236\uff08\u4e00\uff09"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Linux Namespace\u7b80\u4ecb\uff08\u4e00\uff09<\/h2>\n\n\n\n<p>Linux&nbsp;<code>Namespace<\/code>\u63d0\u4f9b\u4e86\u4e00\u79cd\u5185\u6838\u7ea7\u522b\u9694\u79bb\u7cfb\u7edf\u8d44\u6e90\u7684\u65b9\u6cd5\uff0c\u901a\u8fc7\u5c06\u7cfb\u7edf\u7684\u5168\u5c40\u8d44\u6e90\u653e\u5728\u4e0d\u540c\u7684<code>Namespace<\/code>\u4e2d\uff0c\u6765\u5b9e\u73b0\u8d44\u6e90\u9694\u79bb\u7684\u76ee\u7684\u3002\u4e0d\u540c<code>Namespace<\/code>\u7684\u7a0b\u5e8f\uff0c\u53ef\u4ee5\u4eab\u6709\u4e00\u4efd\u72ec\u7acb\u7684\u7cfb\u7edf\u8d44\u6e90\u3002\u76ee\u524dLinux\u4e2d\u63d0\u4f9b\u4e86\u516d\u7c7b\u7cfb\u7edf\u8d44\u6e90\u7684<a href=\"https:\/\/zhida.zhihu.com\/search?content_id=104406504&amp;content_type=Article&amp;match_order=1&amp;q=%E9%9A%94%E7%A6%BB%E6%9C%BA%E5%88%B6&amp;zhida_source=entity\" target=\"_blank\" rel=\"noreferrer noopener\">\u9694\u79bb\u673a\u5236<\/a>\uff0c\u5206\u522b\u662f\uff1a<\/p>\n\n\n\n<ul>\n<li><code>Mount<\/code>: \u9694\u79bb\u6587\u4ef6\u7cfb\u7edf\u6302\u8f7d\u70b9<\/li>\n\n\n\n<li><code>UTS<\/code>: \u9694\u79bb\u4e3b\u673a\u540d\u548c\u57df\u540d\u4fe1\u606f<\/li>\n\n\n\n<li><code>IPC<\/code>: \u9694\u79bb<a href=\"https:\/\/zhida.zhihu.com\/search?content_id=104406504&amp;content_type=Article&amp;match_order=1&amp;q=%E8%BF%9B%E7%A8%8B%E9%97%B4%E9%80%9A%E4%BF%A1&amp;zhida_source=entity\" target=\"_blank\" rel=\"noreferrer noopener\">\u8fdb\u7a0b\u95f4\u901a\u4fe1<\/a><\/li>\n\n\n\n<li><code>PID<\/code>: \u9694\u79bb\u8fdb\u7a0b\u7684ID<\/li>\n\n\n\n<li><code>Network<\/code>: \u9694\u79bb\u7f51\u7edc\u8d44\u6e90<\/li>\n\n\n\n<li><code>User<\/code>: \u9694\u79bb\u7528\u6237\u548c\u7528\u6237\u7ec4\u7684ID<\/li>\n<\/ul>\n\n\n\n<p>\u4e0b\u9762\u7b80\u5355\u7684\u4ecb\u7ecd\u4e00\u4e0b\u8fd9\u4e9b<code>Namespace<\/code>\u7684\u4f7f\u7528\u548c\u529f\u80fd\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Namespace\u7684\u4f7f\u7528<\/h2>\n\n\n\n<p>\u6d89\u53ca\u5230<code>Namespace<\/code>\u7684\u64cd\u4f5c\u63a5\u53e3\u5305\u62ec<code>clone()<\/code>\u3001<code>setns()<\/code>\u3001<code>unshare()<\/code>\u4ee5\u53ca\u8fd8\u6709<code>\/proc<\/code>\u4e0b\u7684\u90e8\u5206\u6587\u4ef6\u3002\u4e3a\u4e86\u4f7f\u7528\u7279\u5b9a\u7684<code>Namespace<\/code>\uff0c\u5728\u4f7f\u7528\u8fd9\u4e9b\u63a5\u53e3\u7684\u65f6\u5019\u9700\u8981\u6307\u5b9a\u4ee5\u4e0b\u4e00\u4e2a\u6216\u591a\u4e2a\u53c2\u6570\uff1a<\/p>\n\n\n\n<ul>\n<li><code>CLONE_NEWNS<\/code>: \u7528\u4e8e\u6307\u5b9a<code>Mount Namespace<\/code><\/li>\n\n\n\n<li><code>CLONE_NEWUTS<\/code>: \u7528\u4e8e\u6307\u5b9a<code>UTS Namespace<\/code><\/li>\n\n\n\n<li><code>CLONE_NEWIPC<\/code>: \u7528\u4e8e\u6307\u5b9a<code>IPC Namespace<\/code><\/li>\n\n\n\n<li><code>CLONE_NEWPID<\/code>: \u7528\u4e8e\u6307\u5b9a<code>PID Namespace<\/code><\/li>\n\n\n\n<li><code>CLONE_NEWNET<\/code>: \u7528\u4e8e\u6307\u5b9a<code>Network Namespace<\/code><\/li>\n\n\n\n<li><code>CLONE_NEWUSER<\/code>: \u7528\u4e8e\u6307\u5b9a<code>User Namespace<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u4e0b\u9762\u7b80\u5355\u6982\u8ff0\u4e00\u4e0b\u8fd9\u51e0\u4e2a\u63a5\u53e3\u7684\u7528\u6cd5\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">clone<a href=\"https:\/\/zhida.zhihu.com\/search?content_id=104406504&amp;content_type=Article&amp;match_order=1&amp;q=%E7%B3%BB%E7%BB%9F%E8%B0%83%E7%94%A8&amp;zhida_source=entity\" target=\"_blank\" rel=\"noreferrer noopener\">\u7cfb\u7edf\u8c03\u7528<\/a><\/h3>\n\n\n\n<p>\u53ef\u4ee5\u901a\u8fc7<code>clone<\/code>\u7cfb\u7edf\u8c03\u7528\u6765\u521b\u5efa\u4e00\u4e2a\u72ec\u7acb<code>Namespace<\/code>\u7684\u8fdb\u7a0b\uff0c\u5b83\u7684\u51fd\u6570\u63cf\u8ff0\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>int clone(int (*child_func)(void *), void *child_stack, int flags, void *arg);<\/code><\/pre>\n\n\n\n<p>\u5b83\u901a\u8fc7<code>flags<\/code>\u53c2\u6570\u6765\u63a7\u5236\u521b\u5efa\u8fdb\u7a0b\u65f6\u7684\u7279\u6027\uff0c\u6bd4\u5982\u65b0\u521b\u5efa\u7684\u8fdb\u7a0b\u662f\u5426\u4e0e\u7236\u8fdb\u7a0b\u5171\u4eab<a href=\"https:\/\/zhida.zhihu.com\/search?content_id=104406504&amp;content_type=Article&amp;match_order=1&amp;q=%E8%99%9A%E6%8B%9F%E5%86%85%E5%AD%98&amp;zhida_source=entity\" target=\"_blank\" rel=\"noreferrer noopener\">\u865a\u62df\u5185\u5b58<\/a>\u7b49\u3002\u6bd4\u5982\u53ef\u4ee5\u4f20\u5165<code>CLONE_NEWNS<\/code>\u6807\u5fd7\u4f7f\u5f97\u65b0\u521b\u5efa\u7684\u8fdb\u7a0b\u62e5\u6709\u72ec\u7acb\u7684<code>Mount Namespace<\/code>\uff0c\u4e5f\u53ef\u4ee5\u4f20\u5165\u591a\u4e2aflags\u4f7f\u5f97\u65b0\u521b\u5efa\u7684\u8fdb\u7a0b\u62e5\u6709\u591a\u79cd\u7279\u6027\uff0c\u6bd4\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>flags = CLONE_NEWNS | CLONE_NEWUTS | CLONE_NEWIPC;<\/code><\/pre>\n\n\n\n<p>\u4f20\u5165\u8fd9\u4e2aflags\u90a3\u4e48\u65b0\u521b\u5efa\u7684\u8fdb\u7a0b\u5c06\u540c\u65f6\u62e5\u6709\u72ec\u7acb\u7684<code>Mount Namespace<\/code>\u3001<code>UTS Namespace<\/code>\u548c<code>IPC Namespace<\/code>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u901a\u8fc7\/proc\u6587\u4ef6\u67e5\u770b\u5df2\u5b58\u5728\u7684Namespace<\/h3>\n\n\n\n<p>\u57283.8\u5185\u6838\u5f00\u59cb\uff0c\u7528\u6237\u53ef\u4ee5\u5728<code>\/proc\/$pid\/ns<\/code>\u6587\u4ef6\u4e0b\u770b\u5230\u672c\u8fdb\u7a0b\u6240\u5c5e\u7684<code>Namespace<\/code>\u7684\u6587\u4ef6\u4fe1\u606f\u3002\u4f8b\u5982PID\u4e3a2704\u8fdb\u7a0b\u7684\u60c5\u51b5\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pica.zhimg.com\/v2-a7cec63ec33dd60377cf4d37bd94d5b4_1440w.jpg\" alt=\"\"\/><\/figure>\n\n\n\n<p>\u5176\u4e2d 4026531839 \u8868\u660e\u662f<code>Namespace<\/code>\u7684ID\uff0c\u5982\u679c\u4e24\u4e2a\u8fdb\u7a0b\u7684<code>Namespace<\/code>&nbsp;ID\u76f8\u540c\u8868\u660e\u4e24\u4e2a\u8fdb\u7a0b\u540c\u5904\u4e8e\u4e00\u4e2a\u547d\u540d\u7a7a\u95f4\u4e2d\u3002<\/p>\n\n\n\n<p><strong>\u8fd9\u91cc\u9700\u8981\u6ce8\u610f\u7684\u662f<\/strong>\uff1a\u53ea<code>\/proc\/$pid\/ns\/<\/code>\u5bf9\u5e94\u7684<code>Namespace<\/code>\u6587\u4ef6\u88ab\u6253\u5f00\uff0c\u5e76\u4e14\u8be5\u6587\u4ef6\u63cf\u8ff0\u7b26\u5b58\u5728\uff0c\u5373\u4f7f\u8be5PID\u6240\u5c5e\u7684\u8fdb\u7a0b\u88ab\u9500\u6bc1\uff0c\u8fd9\u4e2a<code>Namespace<\/code>\u4f1a\u4f9d\u7136\u5b58\u5728\u3002\u53ef\u4ee5\u901a\u8fc7\u6302\u8f7d\u7684\u65b9\u5f0f\u6253\u5f00<a href=\"https:\/\/zhida.zhihu.com\/search?content_id=104406504&amp;content_type=Article&amp;match_order=2&amp;q=%E6%96%87%E4%BB%B6%E6%8F%8F%E8%BF%B0%E7%AC%A6&amp;zhida_source=entity\" target=\"_blank\" rel=\"noreferrer noopener\">\u6587\u4ef6\u63cf\u8ff0\u7b26<\/a>\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>touch ~\/mnt\nmount --bind \/proc\/2704\/mnt ~\/mnt<\/code><\/pre>\n\n\n\n<p>\u8fd9\u6837\u5c31\u53ef\u4ee5\u4fdd\u7559\u4f4fPID\u4e3a2704\u7684\u8fdb\u7a0b\u7684<code>Mount Namespace<\/code>\u4e86\uff0c\u5373\u4f7f2704\u8fdb\u7a0b\u88ab\u9500\u6bc1\u6216\u8005\u9000\u51fa\uff0cID\u4e3a4026531840\u7684<code>Mount Namespace<\/code>\u4f9d\u7136\u4f1a\u5b58\u5728\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">setns\u52a0\u5165\u5df2\u5b58\u5728\u7684Namepspace<\/h3>\n\n\n\n<p><code>setns()<\/code>\u51fd\u6570\u53ef\u4ee5\u628a\u8fdb\u7a0b\u52a0\u5165\u5230\u6307\u5b9a\u7684<code>Namespace<\/code>\u4e2d\uff0c\u5b83\u7684\u51fd\u6570\u63cf\u8ff0\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>int setns(int fd, int nstype);<\/code><\/pre>\n\n\n\n<p>\u5b83\u7684\u53c2\u6570\u63cf\u8ff0\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ul>\n<li><code>fd<\/code>\u53c2\u6570\uff1a\u8868\u793a\u6587\u4ef6\u63cf\u8ff0\u7b26\uff0c\u524d\u9762\u63d0\u5230\u53ef\u4ee5\u901a\u8fc7\u6253\u5f00<code>\/proc\/$pid\/ns\/<\/code>\u7684\u65b9\u5f0f\u5c06\u6307\u5b9a\u7684<code>Namespace<\/code>\u4fdd\u7559\u4e0b\u6765\uff0c\u4e5f\u5c31\u662f\u8bf4\u53ef\u4ee5\u901a\u8fc7\u6587\u4ef6\u63cf\u8ff0\u7b26\u7684\u65b9\u5f0f\u6765\u7d22\u5f15\u5230\u67d0\u4e2a<code>Namespace<\/code>\u3002<\/li>\n\n\n\n<li><code>nstype<\/code>\u53c2\u6570\uff1a\u7528\u6765\u68c0\u67e5<code>fd<\/code>\u5173\u8054<code>Namespace<\/code>\u662f\u5426\u4e0e<code>nstype<\/code>\u8868\u660e\u7684<code>Namespace<\/code>\u4e00\u81f4\uff0c\u5982\u679c\u586b0\u7684\u8bdd\u8868\u793a\u4e0d\u8fdb\u884c\u8be5\u9879\u68c0\u67e5\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u901a\u8fc7\u5728\u7a0b\u5e8f\u4e2d\u8c03\u7528<code>setns<\/code>\u6765\u5c06\u8fdb\u7a0b\u52a0\u5165\u5230\u6307\u5b9a\u7684<code>Namespace<\/code>\u4e2d\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">unshare\u8131\u79bb\u5230\u65b0\u7684Namespace<\/h3>\n\n\n\n<p><code>unshare()<\/code>\u7cfb\u7edf\u8c03\u7528\u7528\u4e8e\u5c06\u5f53\u524d\u8fdb\u7a0b\u548c\u6240\u5728\u7684<code>Namespace<\/code>\u5206\u79bb\uff0c\u5e76\u52a0\u5165\u5230\u4e00\u4e2a\u65b0\u7684<code>Namespace<\/code>\u4e2d\uff0c\u76f8\u5bf9\u4e8e<code>setns()<\/code>\u7cfb\u7edf\u8c03\u7528\u6765\u8bf4\uff0c<code>unshare()<\/code>\u4e0d\u7528\u5173\u8054\u4e4b\u524d\u5b58\u5728\u7684<code>Namespace<\/code>\uff0c\u53ea\u9700\u8981\u6307\u5b9a\u9700\u8981\u5206\u79bb\u7684<code>Namespace<\/code>\u5c31\u884c\uff0c\u8be5\u8c03\u7528\u4f1a\u81ea\u52a8\u521b\u5efa\u4e00\u4e2a\u65b0\u7684<code>Namespace<\/code>\u3002<\/p>\n\n\n\n<p><code>unshare()<\/code>\u7684\u51fd\u6570\u63cf\u8ff0\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>int unshare(int flags);<\/code><\/pre>\n\n\n\n<p>\u5176\u4e2d<code>flags<\/code>\u7528\u4e8e\u6307\u660e\u8981\u5206\u79bb\u7684\u8d44\u6e90\u7c7b\u522b\uff0c\u5b83\u652f\u6301\u7684<code>flags<\/code>\u4e0e<code>clone<\/code>\u7cfb\u7edf\u8c03\u7528\u652f\u6301\u7684<code>flags<\/code>\u7c7b\u4f3c\uff0c\u8fd9\u91cc\u7b80\u8981\u7684\u53d9\u8ff0\u4e00\u4e0b\u51e0\u79cd\u6807\u5fd7\uff1a<\/p>\n\n\n\n<ul>\n<li><code>CLONE_FILES<\/code>: \u5b50\u8fdb\u7a0b\u4e00\u822c\u4f1a\u5171\u4eab\u7236\u8fdb\u7a0b\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\uff0c\u5982\u679c\u5b50\u8fdb\u7a0b\u4e0d\u60f3\u5171\u4eab\u7236\u8fdb\u7a0b\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u4e86\uff0c\u53ef\u4ee5\u901a\u8fc7\u8fd9\u4e2aflag\u6765\u53d6\u6d88\u5171\u4eab\u3002<\/li>\n\n\n\n<li><code>CLONE_FS<\/code>: \u4f7f\u5f53\u524d\u8fdb\u7a0b\u4e0d\u518d\u4e0e\u5176\u4ed6\u8fdb\u7a0b\u5171\u4eab\u6587\u4ef6\u7cfb\u7edf\u4fe1\u606f\u3002<\/li>\n\n\n\n<li><code>CLONE_SYSVSEM<\/code>: \u53d6\u6d88\u4e0e\u5176\u4ed6\u8fdb\u7a0b\u5171\u4eabSYS V<a href=\"https:\/\/zhida.zhihu.com\/search?content_id=104406504&amp;content_type=Article&amp;match_order=1&amp;q=%E4%BF%A1%E5%8F%B7%E9%87%8F&amp;zhida_source=entity\" target=\"_blank\" rel=\"noreferrer noopener\">\u4fe1\u53f7\u91cf<\/a>\u3002<\/li>\n\n\n\n<li><code>CLONE_NEWIPC<\/code>: \u521b\u5efa\u65b0\u7684<code>IPC Namespace<\/code>\uff0c\u5e76\u5c06\u8be5\u8fdb\u7a0b\u52a0\u5165\u8fdb\u6765\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u6ce8\u610f\u4e8b\u9879<\/h3>\n\n\n\n<p><strong>\u8fd9\u91cc\u9700\u8981\u6ce8\u610f\u7684\u662f<\/strong>\uff1a<code>unshare()<\/code>\u548c<code>setns()<\/code>\u7cfb\u7edf\u8c03\u7528\u5bf9<code>PID Namespace<\/code>\u7684\u5904\u7406\u4e0d\u592a\u76f8\u540c\uff0c\u5f53unshare PID namespace\u65f6\uff0c<a href=\"https:\/\/zhida.zhihu.com\/search?content_id=104406504&amp;content_type=Article&amp;match_order=1&amp;q=%E8%B0%83%E7%94%A8%E8%BF%9B%E7%A8%8B&amp;zhida_source=entity\" target=\"_blank\" rel=\"noreferrer noopener\">\u8c03\u7528\u8fdb\u7a0b<\/a>\u4f1a\u4e3a\u5b83\u7684\u5b50\u8fdb\u7a0b\u5206\u914d\u4e00\u4e2a\u65b0\u7684<code>PID Namespace<\/code>\uff0c\u4f46\u662f\u8c03\u7528\u8fdb\u7a0b\u672c\u8eab\u4e0d\u4f1a\u88ab\u79fb\u5230\u65b0\u7684<code>Namespace<\/code>\u4e2d\u3002\u800c\u4e14\u8c03\u7528\u8fdb\u7a0b\u7b2c\u4e00\u4e2a\u521b\u5efa\u7684\u5b50\u8fdb\u7a0b\u5728\u65b0<code>Namespace<\/code>\u4e2d\u7684PID\u4e3a1\uff0c\u5e76\u6210\u4e3a\u65b0<code>Namespace<\/code>\u4e2d\u7684<a href=\"https:\/\/zhida.zhihu.com\/search?content_id=104406504&amp;content_type=Article&amp;match_order=1&amp;q=init%E8%BF%9B%E7%A8%8B&amp;zhida_source=entity\" target=\"_blank\" rel=\"noreferrer noopener\">init\u8fdb\u7a0b<\/a>\u3002<\/p>\n\n\n\n<p><code>setns()<\/code>\u7cfb\u7edf\u8c03\u7528\u4e5f\u662f\u7c7b\u4f3c\u7684\uff0c\u8c03\u7528\u8005\u8fdb\u7a0b\u5e76\u4e0d\u4f1a\u8fdb\u5165\u65b0\u7684PID Namespace\uff0c\u800c\u662f\u968f\u540e\u521b\u5efa\u7684\u5b50\u8fdb\u7a0b\u4f1a\u8fdb\u5165\u3002<\/p>\n\n\n\n<p>\u4e3a\u4ec0\u4e48\u521b\u5efa\u5176\u4ed6\u7684Namespace\u65f6<code>unshare()<\/code>\u548c<code>setns()<\/code>\u4f1a\u76f4\u63a5\u8fdb\u5165\u65b0\u7684Namespace\uff0c\u800c\u552f\u72ecPID Namespace\u4e0d\u662f\u5982\u6b64\u5462\uff1f<\/p>\n\n\n\n<p>\u56e0\u4e3a\u8c03\u7528<code>getpid()<\/code>\u51fd\u6570\u5f97\u5230\u7684PID\u662f\u6839\u636e\u8c03\u7528\u8005\u6240\u5728\u7684PID Namespace\u800c\u51b3\u5b9a\u8fd4\u56de\u54ea\u4e2aPID\uff0c\u8fdb\u5165\u65b0\u7684PID namespace\u4f1a\u5bfc\u81f4PID\u4ea7\u751f\u53d8\u5316\u3002\u800c\u5bf9\u7528\u6237\u6001\u7684\u7a0b\u5e8f\u548c\u5e93\u51fd\u6570\u6765\u8bf4\uff0c\u4ed6\u4eec\u90fd\u8ba4\u4e3a\u8fdb\u7a0b\u7684PID\u662f\u4e00\u4e2a\u5e38\u91cf\uff0cPID\u7684\u53d8\u5316\u4f1a\u5f15\u8d77\u8fd9\u4e9b\u8fdb\u7a0b\u5954\u6e83\u3002<\/p>\n\n\n\n<p>\u6362\u53e5\u8bdd\u8bf4\uff0c\u4e00\u65e6\u7a0b\u5e8f\u8fdb\u7a0b\u521b\u5efa\u4ee5\u540e\uff0c\u90a3\u4e48\u5b83\u7684PID namespace\u7684\u5173\u7cfb\u5c31\u786e\u5b9a\u4e0b\u6765\u4e86\uff0c\u8fdb\u7a0b\u4e0d\u4f1a\u53d8\u66f4\u4ed6\u4eec\u5bf9\u5e94\u7684PID namespace\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5c0f\u7ed3<\/h3>\n\n\n\n<p>\u901a\u8fc7\u4e0a\u9762\u7b80\u5355\u7684\u6982\u8ff0\uff0c\u5bf9\u4e8e<code>Namespace<\/code>\u7684\u64cd\u4f5c\u6709\u4ee5\u4e0b\u65b9\u5f0f\uff1a<\/p>\n\n\n\n<ul>\n<li>1\u3001\u53ef\u4ee5\u5728\u8fdb\u7a0b\u521a\u521b\u5efa\u7684\u65f6\u5019\u901a\u8fc7<code>clone<\/code>\u7cfb\u7edf\u8c03\u7528\u4e3a\u65b0\u8fdb\u7a0b\u5206\u914d\u4e00\u4e2a\u6216\u591a\u4e2a\u65b0\u7684<code>Namespace<\/code>\u3002<\/li>\n\n\n\n<li>2\u3001\u901a\u8fc7<code>setns()<\/code>\u5c06\u8fdb\u7a0b\u52a0\u5165\u5230\u5df2\u6709\u7684<code>Namespace<\/code>\u4e2d\u3002<\/li>\n\n\n\n<li>3\u3001\u901a\u8fc7<code>unshare()<\/code>\u4e3a\u5df2\u5b58\u5728\u7684\u8fdb\u7a0b\u521b\u5efa\u4e00\u4e2a\u6216\u591a\u4e2a\u65b0\u7684<code>Namespace<\/code>\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u63a5\u4e0b\u6765\u8be6\u7ec6\u7684\u4ecb\u7ecd\u4e00\u4e0b\u5404\u4e2a<code>Namespace<\/code>\u7684\u529f\u80fd\u548c\u7279\u6027\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Mount Namespace<\/h2>\n\n\n\n<p><code>Mount Namespace<\/code>\u7528\u6765\u9694\u79bb\u6587\u4ef6\u7cfb\u7edf\u7684\u6302\u8f7d\u70b9\uff0c\u4e0d\u540c<code>Mount Namespace<\/code>\u7684\u8fdb\u7a0b\u62e5\u6709\u4e0d\u540c\u7684\u6302\u8f7d\u70b9\uff0c\u540c\u65f6\u4e5f\u62e5\u6709\u4e86\u4e0d\u540c\u7684\u6587\u4ef6\u7cfb\u7edf\u89c6\u56fe\u3002<code>Mount Namespace<\/code>\u662f\u5386\u53f2\u4e0a\u7b2c\u4e00\u4e2a\u652f\u6301\u7684<code>Namespace<\/code>\uff0c\u5b83\u901a\u8fc7<code>CLONE_NEWNS<\/code>\u6765\u6807\u8bc6\u7684\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u6302\u8f7d\u7684\u6982\u5ff5<\/h3>\n\n\n\n<p>\u6302\u8f7d\u7684\u8fc7\u7a0b\u662f\u901a\u8fc7<code>mount<\/code>\u7cfb\u7edf\u8c03\u7528\u5b8c\u6210\u7684\uff0c\u5b83\u6709\u4e24\u4e2a\u53c2\u6570\uff1a\u4e00\u4e2a\u662f\u5df2\u5b58\u5728\u7684\u666e\u901a\u6587\u4ef6\u540d\uff0c\u4e00\u4e2a\u662f\u53ef\u4ee5\u76f4\u63a5\u8bbf\u95ee\u7684\u7279\u6b8a\u6587\u4ef6\uff0c\u4e00\u4e2a\u662f\u7279\u6b8a\u6587\u4ef6\u7684\u540d\u5b57\u3002\u8fd9\u4e2a\u7279\u6b8a\u6587\u4ef6\u4e00\u822c\u7528\u6765\u5173\u8054\u4e00\u4e9b\u5b58\u50a8\u5377\uff0c\u8fd9\u4e2a\u5b58\u50a8\u5377\u53ef\u4ee5\u5305\u542b\u81ea\u5df1\u7684\u76ee\u5f55\u5c42\u7ea7\u548c<a href=\"https:\/\/zhida.zhihu.com\/search?content_id=104406504&amp;content_type=Article&amp;match_order=1&amp;q=%E6%96%87%E4%BB%B6%E7%B3%BB%E7%BB%9F%E7%BB%93%E6%9E%84&amp;zhida_source=entity\" target=\"_blank\" rel=\"noreferrer noopener\">\u6587\u4ef6\u7cfb\u7edf\u7ed3\u6784<\/a>\u3002<\/p>\n\n\n\n<p><code>mount<\/code>\u6240\u8fbe\u5230\u7684\u6548\u679c\u662f\uff1a\u50cf\u8bbf\u95ee\u4e00\u4e2a\u666e\u901a\u7684\u6587\u4ef6\u4e00\u6837\u8bbf\u95ee\u4f4d\u4e8e\u5176\u4ed6\u8bbe\u5907\u4e0a\u6587\u4ef6\u7cfb\u7edf\u7684<a href=\"https:\/\/zhida.zhihu.com\/search?content_id=104406504&amp;content_type=Article&amp;match_order=1&amp;q=%E6%A0%B9%E7%9B%AE%E5%BD%95&amp;zhida_source=entity\" target=\"_blank\" rel=\"noreferrer noopener\">\u6839\u76ee\u5f55<\/a>\uff0c\u4e5f\u5c31\u662f\u5c06\u8be5\u8bbe\u5907\u4e0a\u76ee\u5f55\u7684\u6839\u8282\u70b9\u6302\u5230\u4e86\u53e6\u5916\u4e00\u4e2a\u6587\u4ef6\u7cfb\u7edf\u7684\u9875\u8282\u70b9\u4e0a\uff0c\u8fbe\u5230\u7ed9\u8fd9\u4e2a\u6587\u4ef6\u7cfb\u7edf\u6269\u5145\u5bb9\u91cf\u7684\u76ee\u7684\u3002<\/p>\n\n\n\n<p>\u53ef\u4ee5\u901a\u8fc7<code>\/proc<\/code>\u6587\u4ef6\u7cfb\u7edf\u67e5\u770b\u4e00\u4e2a\u8fdb\u7a0b\u7684\u6302\u8f7d\u4fe1\u606f\uff0c\u5177\u4f53\u505a\u6cd5\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>cat \/proc\/$pid\/mountinfo<\/code><\/pre>\n\n\n\n<p>\u5176\u8f93\u51fa\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/picx.zhimg.com\/v2-76fbc9da7d7c3248132506ede259bc75_1440w.jpg\" alt=\"\"\/><\/figure>\n\n\n\n<p>\u5176\u4e2d\u8f93\u51fa\u7684\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pica.zhimg.com\/v2-77ecbf746f9ce998ea3fbc3c63ffe1c4_1440w.jpg\" alt=\"\"\/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u6302\u8f7d\u4f20\u64ad<\/h3>\n\n\n\n<p>\u8fdb\u7a0b\u5728\u521b\u5efa<code>Mount Namespace<\/code>\u65f6\uff0c\u4f1a\u628a\u5f53\u524d\u7684\u6587\u4ef6\u7ed3\u6784\u590d\u5236\u7ed9\u65b0\u7684<code>Namespace<\/code>\uff0c\u65b0\u7684<code>Namespace<\/code>\u4e2d\u7684\u6240\u6709<code>mount<\/code>\u64cd\u4f5c\u4ec5\u5f71\u54cd\u81ea\u8eab\u7684\u6587\u4ef6\u7cfb\u7edf\u3002\u4f46\u968f\u7740\u5f15\u5165<strong>\u6302\u8f7d\u4f20\u64ad<\/strong>\u7684\u7279\u6027\uff0c<code>Mount Namespace<\/code>\u53d8\u5f97\u5e76\u4e0d\u662f\u5b8c\u5168\u610f\u4e49\u4e0a\u7684\u8d44\u6e90\u9694\u79bb\uff0c\u8fd9\u79cd\u4f20\u64ad\u7279\u6027\u4f7f\u5f97\u591a<code>Mount Namespace<\/code>\u4e4b\u95f4\u7684\u6302\u8f7d\u4e8b\u4ef6\u53ef\u4ee5\u76f8\u4e92\u5f71\u54cd\u3002<\/p>\n\n\n\n<p>\u6302\u8f7d\u4f20\u64ad\u5b9a\u4e49\u4e86\u6302\u8f7d\u5bf9\u8c61\u4e4b\u95f4\u7684\u5173\u7cfb\uff0c\u7cfb\u7edf\u5229\u7528\u8fd9\u4e9b\u5173\u7cfb\u6765\u51b3\u5b9a\u6302\u8f7d\u5bf9\u8c61\u4e2d\u7684\u6302\u8f7d\u4e8b\u4ef6\u5bf9\u5176\u4ed6\u6302\u8f7d\u5bf9\u8c61\u7684\u5f71\u54cd\u3002\u5176\u4e2d\u6302\u8f7d\u5bf9\u8c61\u4e4b\u95f4\u7684\u5173\u7cfb\u63cf\u8ff0\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ul>\n<li>\u5171\u4eab\u5173\u7cfb(MS_SHARED)\uff1a\u4e00\u4e2a\u6302\u8f7d\u5bf9\u8c61\u7684\u6302\u8f7d\u4e8b\u4ef6\u4f1a\u8de8<code>Namespace<\/code>\u5171\u4eab\u5230\u5176\u4ed6\u6302\u8f7d\u5bf9\u8c61\u3002<\/li>\n\n\n\n<li>\u4ece\u5c5e\u5173\u7cfb(MS_SLAVE): \u4f20\u64ad\u7684\u65b9\u5411\u662f\u5355\u5411\u7684\uff0c\u5373\u53ea\u80fd\u4eceMaster\u4f20\u64ad\u5230Slave\u65b9\u5411\u3002<\/li>\n\n\n\n<li>\u79c1\u6709\u5173\u7cfb(MS_PRIVATE): \u4e0d\u540c<code>Namespace<\/code>\u7684\u6302\u8f7d\u4e8b\u4ef6\u662f\u4e92\u4e0d\u5f71\u54cd\u7684(\u9ed8\u8ba4\u9009\u9879)\u3002<\/li>\n\n\n\n<li>\u4e0d\u53ef\u7ed1\u5b9a\u5173\u7cfb(MS_UNBINDABLE): \u4e00\u4e2a\u4e0d\u53ef\u7ed1\u5b9a\u7684\u79c1\u6709\u6302\u8f7d\uff0c\u4e0e\u79c1\u6709\u6302\u8f7d\u7c7b\u4f3c\uff0c\u4f46\u662f\u4e0d\u80fd\u6267\u884c\u6302\u8f7d\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u5176\u4e2d\u7ed9<a href=\"https:\/\/zhida.zhihu.com\/search?content_id=104406504&amp;content_type=Article&amp;match_order=4&amp;q=%E6%8C%82%E8%BD%BD%E7%82%B9&amp;zhida_source=entity\" target=\"_blank\" rel=\"noreferrer noopener\">\u6302\u8f7d\u70b9<\/a>\u8bbe\u7f6e\u6302\u8f7d\u5173\u7cfb\u7684\u4f8b\u5b50\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>mount --make-shared \/mntS      # \u5c06\u6302\u8f7d\u70b9\u8bbe\u7f6e\u4e3a\u5171\u4eab\u5173\u7cfb\u5c5e\u6027\n mount --make-private \/mntP     # \u5c06\u6302\u8f7d\u70b9\u8bbe\u7f6e\u4e3a\u79c1\u6709\u5173\u7cfb\u5c5e\u6027\n mount --make-slave \/mntY       # \u5c06\u6302\u8f7d\u70b9\u8bbe\u7f6e\u4e3a\u4ece\u5c5e\u5173\u7cfb\u5c5e\u6027\n mount --make-unbindable \/mntU  # \u5c06\u6302\u8f7d\u70b9\u8bbe\u7f6e\u4e3a\u4e0d\u53ef\u7ed1\u5b9a\u5c5e\u6027<\/code><\/pre>\n\n\n\n<p>\u6ce8\u610f\u5728\u8bbe\u7f6e\u79c1\u6709\u5173\u7cfb\u5c5e\u6027\u65f6\uff0c\u5728\u672c<a href=\"https:\/\/zhida.zhihu.com\/search?content_id=104406504&amp;content_type=Article&amp;match_order=2&amp;q=%E5%91%BD%E5%90%8D%E7%A9%BA%E9%97%B4&amp;zhida_source=entity\" target=\"_blank\" rel=\"noreferrer noopener\">\u547d\u540d\u7a7a\u95f4<\/a>\u4e0b\u7684\u8fd9\u4e2a\u6302\u8f7d\u70b9\u662fSlave\uff0c\u800c\u7236\u547d\u540d\u7a7a\u95f4\u4e0b\u8fd9\u4e2a\u6302\u8f7d\u70b9\u662fMaster\uff0c\u6302\u8f7d\u4f20\u64ad\u7684\u65b9\u5411\u53ea\u80fd\u7531Master\u4f20\u7ed9Slave\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7ed1\u5b9a\u6302\u8f7d<\/h3>\n\n\n\n<p>\u7ed1\u5b9a\u6302\u8f7d\u7684\u5f15\u5165\u4f7f\u5f97<code>mount<\/code>\u7684\u5176\u4e2d\u4e00\u4e2a\u53c2\u6570\u4e0d\u4e00\u5b9a\u8981\u662f\u4e00\u4e2a\u7279\u6b8a\u6587\u4ef6\uff0c\u4e5f\u53ef\u4ee5\u662f\u8be5\u6587\u4ef6\u7cfb\u7edf\u4e0a\u7684\u4e00\u4e2a\u666e\u901a\u6587\u4ef6\u76ee\u5f55\u3002Linux\u4e2d\u7ed1\u5b9a\u6302\u8f7d\u7684\u7528\u6cd5\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>mount --bind \/home\/work \/home\/alpha\nmount -o bind \/home\/work \/home\/alpha<\/code><\/pre>\n\n\n\n<p>\u5176\u4e2d<code>\/home\/work<\/code>\u662f\u78c1\u76d8\u4e0a\u7684\u5b58\u5728\u7684\u4e00\u4e2a\u76ee\u5f55\uff0c\u800c\u4e0d\u662f\u4e00\u4e2a\u6587\u4ef6\u8bbe\u5907(\u6bd4\u5982<a href=\"https:\/\/zhida.zhihu.com\/search?content_id=104406504&amp;content_type=Article&amp;match_order=1&amp;q=%E7%A3%81%E7%9B%98%E5%88%86%E5%8C%BA&amp;zhida_source=entity\" target=\"_blank\" rel=\"noreferrer noopener\">\u78c1\u76d8\u5206\u533a<\/a>)\u3002\u5982\u679c\u9700\u8981\u5c06Linux\u4e2d\u4e24\u4e2a\u6587\u4ef6\u76ee\u5f55\u94fe\u63a5\u8d77\u6765\uff0c\u53ef\u4ee5\u901a\u8fc7\u7ed1\u5b9a\u6302\u8f7d\u7684\u65b9\u5f0f\uff0c\u6302\u8f7d\u540e\u7684\u6548\u679c\u7c7b\u4f3c\u4e8e\u5728\u4e24\u4e2a\u6587\u4ef6\u76ee\u5f55\u4e0a\u5efa\u7acb\u4e86<a href=\"https:\/\/zhida.zhihu.com\/search?content_id=104406504&amp;content_type=Article&amp;match_order=1&amp;q=%E7%A1%AC%E9%93%BE%E6%8E%A5&amp;zhida_source=entity\" target=\"_blank\" rel=\"noreferrer noopener\">\u786c\u94fe\u63a5<\/a>\u3002<\/p>\n\n\n\n<p>\u5728\u7ed1\u5b9a\u6302\u8f7d\u4e2d\u540c\u65f6\u4f1a\u6d89\u53ca\u5230\u6302\u8f7d\u7684\u4f20\u64ad\u7279\u6027\uff0c\u6302\u8f7d\u4f20\u64ad\u7684\u7279\u6027\u53c2\u8003\uff1a<a href=\"https:\/\/link.zhihu.com\/?target=https%3A\/\/www.kernel.org\/doc\/Documentation\/filesystems\/sharedsubtree.txt\" target=\"_blank\" rel=\"noreferrer noopener\">Linux\u7ed1\u5b9a\u6302\u8f7d<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">UTS Namespace<\/h2>\n\n\n\n<p><code>UTS Namespace<\/code>\u63d0\u4f9b\u4e86\u4e3b\u673a\u540d\u548c\u57df\u540d\u7684\u9694\u79bb\uff0c\u4e5f\u5c31\u662f<code>struct utsname<\/code>\u91cc\u7684<code>nodename<\/code>\u548c<code>domainname<\/code>\u4e24\u4e2a\u5b57\u6bb5\u3002\u4e0d\u540c<code>Namespace<\/code>\u4e2d\u53ef\u4ee5\u62e5\u6709\u72ec\u7acb\u7684\u4e3b\u673a\u540d\u548c\u57df\u540d\u3002<\/p>\n\n\n\n<p>\u90a3\u4e48\u4e3a\u4ec0\u4e48\u9700\u8981\u5bf9\u4e3b\u673a\u540d\u548c\u57df\u540d\u8fdb\u884c\u9694\u79bb\u5462\uff1f\u56e0\u4e3a\u4e3b\u673a\u540d\u548c\u57df\u540d\u53ef\u4ee5\u7528\u6765\u4ee3\u66ffIP\u5730\u5740\uff0c\u5982\u679c\u6ca1\u6709\u8fd9\u4e00\u5c42\u9694\u79bb\uff0c\u540c\u4e00\u4e3b\u673a\u4e0a\u4e0d\u540c\u7684\u5bb9\u5668\u7684\u7f51\u7edc\u8bbf\u95ee\u5c31\u53ef\u80fd\u51fa\u95ee\u9898\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">IPC Namespace<\/h2>\n\n\n\n<p><code>IPC Namespace<\/code>\u662f\u5bf9\u8fdb\u7a0b\u95f4\u901a\u4fe1\u7684\u9694\u79bb\uff0c\u8fdb\u7a0b\u95f4\u901a\u4fe1\u5e38\u89c1\u7684\u65b9\u6cd5\u6709\u4fe1\u53f7\u91cf\u3001\u6d88\u606f\u961f\u5217\u548c\u5171\u4eab\u5185\u5b58\u3002<code>IPC Namespace<\/code>\u4e3b\u8981\u9488\u5bf9\u7684\u662fSystemV IPC\u548cPosix<a href=\"https:\/\/zhida.zhihu.com\/search?content_id=104406504&amp;content_type=Article&amp;match_order=2&amp;q=%E6%B6%88%E6%81%AF%E9%98%9F%E5%88%97&amp;zhida_source=entity\" target=\"_blank\" rel=\"noreferrer noopener\">\u6d88\u606f\u961f\u5217<\/a>\uff0c\u8fd9\u4e9bIPC\u673a\u5236\u90fd\u4f1a\u7528\u5230<a href=\"https:\/\/zhida.zhihu.com\/search?content_id=104406504&amp;content_type=Article&amp;match_order=1&amp;q=%E6%A0%87%E8%AF%86%E7%AC%A6&amp;zhida_source=entity\" target=\"_blank\" rel=\"noreferrer noopener\">\u6807\u8bc6\u7b26<\/a>\uff0c\u6bd4\u5982\u7528\u6807\u8bc6\u7b26\u6765\u533a\u5206\u4e0d\u540c\u7684\u6d88\u606f\u961f\u5217\uff0c<code>IPC Namespace<\/code>\u8981\u8fbe\u5230\u7684\u76ee\u6807\u662f\u76f8\u540c\u7684\u6807\u8bc6\u7b26\u5728\u4e0d\u540c\u7684<code>Namepspace<\/code>\u4e2d\u4ee3\u8868\u4e0d\u540c\u7684\u901a\u4fe1\u4ecb\u8d28(\u6bd4\u5982\u4fe1\u53f7\u91cf\u3001\u6d88\u606f\u961f\u5217\u548c<a href=\"https:\/\/zhida.zhihu.com\/search?content_id=104406504&amp;content_type=Article&amp;match_order=2&amp;q=%E5%85%B1%E4%BA%AB%E5%86%85%E5%AD%98&amp;zhida_source=entity\" target=\"_blank\" rel=\"noreferrer noopener\">\u5171\u4eab\u5185\u5b58<\/a>)\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u672a\u5b8c\u5f85\u7eed<\/h2>\n\n\n\n<ul>\n<li>PID Namepace<\/li>\n\n\n\n<li>Network Namespace<\/li>\n\n\n\n<li>User Namespace<\/li>\n\n\n\n<li>Namespace Demo\u7a0b\u5e8f<\/li>\n\n\n\n<li><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Linux Namespace\u7b80\u4ecb\uff08\u4e00\uff09 Linux&nbsp;Namespace\u63d0\u4f9b\u4e86\u4e00\u79cd\u5185\u6838\u7ea7\u522b\u9694\u79bb\u7cfb\u7edf\u8d44 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"_links":{"self":[{"href":"http:\/\/www.oldjiang.top\/index.php?rest_route=\/wp\/v2\/posts\/32"}],"collection":[{"href":"http:\/\/www.oldjiang.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.oldjiang.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.oldjiang.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.oldjiang.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=32"}],"version-history":[{"count":1,"href":"http:\/\/www.oldjiang.top\/index.php?rest_route=\/wp\/v2\/posts\/32\/revisions"}],"predecessor-version":[{"id":33,"href":"http:\/\/www.oldjiang.top\/index.php?rest_route=\/wp\/v2\/posts\/32\/revisions\/33"}],"wp:attachment":[{"href":"http:\/\/www.oldjiang.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=32"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.oldjiang.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=32"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.oldjiang.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=32"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}