{"id":17226,"date":"2017-05-09T12:00:11","date_gmt":"2017-05-09T03:00:11","guid":{"rendered":"https:\/\/www.creationline.com\/?p=17226"},"modified":"2017-05-09T12:07:05","modified_gmt":"2017-05-09T03:07:05","slug":"%e3%80%90%e5%92%8c%e8%a8%b3%e3%80%91%e3%82%b3%e3%83%b3%e3%83%86%e3%83%8a%e3%81%a8%e3%82%b9%e3%83%88%e3%83%ac%e3%83%bc%e3%82%b8%e3%81%ae%e5%95%8f%e9%a1%8c%ef%bc%9a%e3%82%b3%e3%83%b3%e3%83%86%e3%83%8a","status":"publish","type":"post","link":"https:\/\/www.creationline.com\/tech-blog\/cloudnative\/docker\/17226","title":{"rendered":"\u3010\u548c\u8a33\u3011\u30b3\u30f3\u30c6\u30ca\u3068\u30b9\u30c8\u30ec\u30fc\u30b8\u306e\u554f\u984c\uff1a
\u30b3\u30f3\u30c6\u30ca\u666e\u53ca\u306e\u8981\u56e0\u5206\u6790\u3000#docker"},"content":{"rendered":"

\u672c\u7a3f\u306f2017\u5e744\u67087\u65e5\u300cContainers and Storage: Why We Aren\u2019t There Yet\u300d<\/a>\u3092\u548c\u8a33\u3057\u305f\u3082\u306e\u3067\u3059\u3002
\n\"\"<\/p>\n

IBM\u306e\u30b3\u30f3\u30c6\u30ca\u6280\u8853\u306e\u5c02\u9580\u5bb6\u3001James Bottomley<\/a>\u6c0f\u306e \u5148\u65e5\u30dc\u30b9\u30c8\u30f3\u3067\u958b\u50ac\u3055\u308c\u305fLinux Foundation Vault<\/a> storage \u30ab\u30f3\u30d5\u30a1\u30ec\u30f3\u30b9\u3067\u306e\u767a\u8868\u306e\u5185\u5bb9\u306b\u3088\u308b\u3068\u3001\u30b3\u30f3\u30c6\u30ca\u306e\u30aa\u30fc\u30b1\u30b9\u30c8\u30ec\u30fc\u30b7\u30e7\u30f3\u7cfb\u306e\u6280\u8853\u304c\u591a\u304f\u767b\u5834\u3057\u3066\u3044\u308b\u304c\u3001\u5b9a\u5e38\u7684\u30b9\u30c8\u30ec\u30fc\u30b8\u306e\u554f\u984c\u304c\u89e3\u6c7a\u3055\u308c\u306a\u3051\u308c\u3070\u3001\u672c\u683c\u7684\u306a\u666e\u53ca\u306f\u96e3\u3057\u3044\u3001\u3068\u8ff0\u3079\u3066\u3044\u308b\u3002<\/p>\n

\u6839\u672c\u7684\u306a\u554f\u984c\uff1a\u30b9\u30c6\u30fc\u30c8\u30d5\u30eb\u30b9\u30c8\u30ec\u30fc\u30b8\uff08\u6052\u5e38\u7684\u30b9\u30c8\u30ec\u30fc\u30b8\uff09\u306fLinux\u7cfb\u306e\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306b\u304a\u3044\u3066\u306f\u3001\u5916\u90e8\u30b9\u30c8\u30ec\u30fc\u30b8\u30b7\u30b9\u30c6\u30e0\u306e\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u81ea\u4f53\u306e\u30e6\u30fc\u30b6ID (fsuid) \u3068 \u30b3\u30f3\u30c6\u30ca\u5185\u3067\u751f\u6210\u3055\u308c\u308b\u30e6\u30fc\u30b6ID (uids) \u3068\u306e\u9023\u643a\u3092\u7dad\u6301\u3059\u308b\u4e8b\u304c\u51fa\u6765\u306a\u3044\u4e8b\u3002<\/p>\n

Linux\u30ab\u30fc\u30cd\u30eb\u5074\u306f\u3001superblock user namespace<\/a>\u306e\u63d0\u4f9b\u3092\u901a\u3057\u3066\u3053\u306e\u554f\u984c\u306e\u5bfe\u5fdc\u306b\u53d6\u308a\u7d44\u3093\u3067\u3044\u308b\u304c\u5b8c\u5168\u306a\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3068\u306f\u8a00\u3044\u304c\u305f\u304f\u3001\u30b3\u30f3\u30c6\u30ca\u5074\u306e\u52aa\u529b\u3082\u307e\u3060\u307e\u3060\u5fc5\u8981\u3067\u3042\u308b\u3002<\/p>\n

\u30cd\u30fc\u30e0\u30b9\u30da\u30fc\u30b9\u306e\u4e16\u754c<\/strong><\/p>\n

\u3053\u3053\u3067Linux\u306euser namespaces<\/a>\u306e\u91cd\u8981\u306a\u5f79\u5272\u3092\u77e5\u308b\u5fc5\u8981\u304c\u3042\u308b\u3001\u3068Bottomley\u6c0f\u306f\u8ff0\u3079\u308b\u3002\u30b3\u30f3\u30c6\u30ca\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306fnamespaces\u306b\u4f9d\u5b58\u3057\u3066\u308b\u3053\u3068\u306f\u77e5\u3089\u308c\u3066\u3044\u308b\u304c\u3001\u8aa4\u89e3\u304c\u591a\u3044\u3068\u306e\u3053\u3068\u3002\u672c\u6765\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30b7\u30b9\u30c6\u30e0\u3068\u3044\u3046\u306e\u306f\u30b7\u30b9\u30c6\u30e0\u304b\u3089\u4eba\u3092\u7de0\u3081\u51fa\u3059\u305f\u3081\u306b\u5b58\u5728\u3059\u308b\u304c\u3001namespace\u306f\u305d\u306e\u9006\u3067\u3001\u30e6\u30fc\u30b6\u306b\u5927\u304d\u306a\u6a29\u9650\u3092\u4e0e\u3048\u308b\u4e8b\u304c\u5f79\u5272\u3067\u3042\u308b\u3001\u3068\u6307\u6458\u3057\u3066\u3044\u308b\u3002<\/p>\n

\"\"<\/p>\n

Root\u6a29\u9650\u3067\u306e\u51e6\u7406\u306fnamespace\u5185\u3067\u306f\u4f7f\u3048\u308b\u304c\u3001\u305d\u306e\u5916\u3067\u306f\u4f7f\u3046\u3053\u3068\u306f\u3067\u304d\u306a\u3044\u3002\u4f8b\u3048\u3070\u3001mount\u30b3\u30de\u30f3\u30c9\u3092namespace\u5185\u3067\u5b9f\u884c\u3067\u304d\u3066\u3082\u3001\u666e\u901a\u306e\u30e6\u30fc\u30b6\u3068\u3057\u3066\u306f\u5b9f\u884c\u3067\u304d\u306a\u3044<\/a>\u3001\u7b49\u306e\u5236\u9650\u304c\u3042\u308b\u3002<\/p>\n

\u30e6\u30fc\u30b6\u306enamespace\u306f\u5185\u90e8\u306einterior uid\u3068\u5916\u90e8\u306eexterior uid\u3092\u30de\u30c3\u30d4\u30f3\u30b0\u3057\u3001\u3053\u306eexterior uid\u304c\u30ab\u30fc\u30cd\u30eb\u304b\u3089\u898b\u3048\u308b\u3082\u306e\u3002interior uid\u306f\u30b3\u30f3\u30c6\u30ca\u5185\u306e\u30e6\u30fc\u30b6\u304c\u898b\u3048\u308b\u3082\u306e\u3002<\/p>\n

\u3053\u306e\u7570\u306a\u308b\u4e16\u754c\u3092\u7d71\u5408\u3057\u3088\u3046\u3068\u3057\u3066\u8272\u3005\u3068\u52aa\u529b\u304c\u3055\u308c\u3066\u3044\u308b\u304c\u3001\u7d50\u5c40\u30b3\u30f3\u30c6\u30ca\u30aa\u30fc\u30b1\u30b9\u30c8\u30ec\u30fc\u30b7\u30e7\u30f3\u306e\u30b7\u30b9\u30c6\u30e0\u306f\u5168\u3066root\u5185\u3067\u904b\u7528\u3059\u308b\u3001\u3068\u3044\u3046\u554f\u984c\u6027\u306e\u3042\u308b\u5fc5\u8981\u6027\u3092\u751f\u3093\u3067\u3057\u307e\u3063\u3066\u3044\u308b\u3002<\/p>\n

\u300cUser namespace\u306b\u95a2\u3059\u308b\u30d0\u30b0\u3084\u554f\u984c\u306f\u3053\u3046\u3044\u3063\u305f\u7d71\u5408\u306e\u8a66\u307f\u304b\u3089\u751f\u307e\u308c\u3066\u3044\u308b\u3002\u300d\u3068Bottomley\u6c0f\u306f\u8ff0\u3079\u308b\u3002\u4f8b\u3048\u3070\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u6a5f\u80fd\u304cnamespace\u5185\u3067\u7a3c\u50cd\u3059\u308b\u4e8b\u3067\u3001\u6a29\u9650\u306e\u30a8\u30b9\u30ab\u30ec\u30fc\u30b7\u30e7\u30f3\u306b\u95a2\u9023\u3057\u305f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u554f\u984c\u304c\u8868\u9762\u5316\u3059\u308b\u3001\u3068\u6307\u6458\u3057\u3066\u3044\u308b\u3002Docker\u793e\u304cv1.10\u3067\u5b9f\u88c5\u3057\u305f\u3001user namespaces\u306e\u30b5\u30dd\u30fc\u30c8<\/a>\u306b\u3064\u3044\u3066\u3082\u3001\u554f\u984c\u306e\u591a\u3044\u6a5f\u80fd\u3060\u3001\u3068\u8a00\u3044\u5207\u3063\u3066\u3044\u308b\u3002<\/p>\n

\u5f93\u3063\u3066\u3001user namespace\u4e0a\u306e\u30aa\u30da\u30ec\u30fc\u30b7\u30e7\u30f3\u306f\u5168\u3066root\u6a29\u9650\u3092\u6301\u3064\u30aa\u30da\u30ec\u30fc\u30b7\u30e7\u30f3\u306b\u306a\u308b\u3002\u696d\u754c\u5168\u4f53\u304c\u76ee\u6307\u3057\u3066\u3044\u308b\u306e\u306f\u6a29\u9650\u3092\u6301\u305f\u306a\u3044\u30b3\u30f3\u30c6\u30ca<\/a>\u306e\u904b\u7528\u3067\u3042\u308b\u304c\u3001\u30af\u30e9\u30a6\u30c9\u4e0a\u3067\u30c7\u30d7\u30ed\u30a4\u3059\u308b\u4e16\u754c\u306b\u304a\u3044\u3066\u3001\u307e\u3060\u307e\u3060\u9053\u306e\u308a\u304c\u9577\u3044\u3001\u3068Bottomley\u6c0f\u306f\u8ff0\u3079\u308b\u3002<\/p>\n

\u5927\u304d\u306a\u554f\u984c\u306f\u3001\u30b3\u30f3\u30c6\u30ca\u304c\u5916\u90e8\u30b9\u30c8\u30ec\u30fc\u30b8\u306b\u30c7\u30fc\u30bf\u3092\u66f8\u304d\u8fbc\u3080\u6642\u3002\u30b9\u30c8\u30ec\u30fc\u30b8\u30b7\u30b9\u30c6\u30e0\u306f\u901a\u5e38\u81ea\u5206\u306euid\u3092\u6301\u3061\uff08\u4e0a\u8a18\u306efsuid\uff09\u3001\u30e6\u30fc\u30b6\u306e\u6301\u3064\u30ab\u30fc\u30cd\u30ebuid\u3068\u5bfe\u5fdc\u3065\u3051\u3089\u308c\u3066\u3044\u308b\u3002\u30ab\u30fc\u30cd\u30eb\u304cuid\u3068fsuid\u3068\u306e\u9593\u306e\u9023\u643a\u3092\u4fdd\u3064\u3002Root\u5185\u306e\u30b3\u30f3\u30c6\u30ca\u306fuid=0\u3092\u6301\u3061\u3001\u30ab\u30fc\u30cd\u30eb\u304c\u305d\u308c\u3092\u30b3\u30f3\u30c6\u30ca\u306e\u30aa\u30fc\u30ca\u30fc\u306e\u6301\u3064uid\uff08fsuid\u306b\u5bfe\u5fdc\uff09\u306b\u5909\u63db\u3057\u3001\u3053\u308c\u306f\u30b7\u30b9\u30c6\u30e0\u4e0a\u306e\u3059\u3079\u3066\u306e\u30e6\u30fc\u30b6\u304c\u898b\u3048\u308b\u69d8\u306b\u306a\u308b\u3002<\/p>\n

\u3053\u3053\u307e\u3067\u306f\u554f\u984c\u306a\u3044\u304c\u3001\u30b3\u30f3\u30c6\u30ca\u3092\u5171\u6709\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u554f\u984c\u304c\u767a\u751f\u3059\u308b\u3002Docker Hub<\/a>\u306e\u69d8\u306b\u3001\u30b3\u30f3\u30c6\u30ca\u3092\u5171\u6709\u3067\u304d\u308b\u74b0\u5883\u306b\u304a\u3044\u3066\u3001\u305d\u308c\u305e\u308c\u7570\u306a\u308broot\u74b0\u5883\u3067\u9020\u3089\u308c\u3066\u3044\u308b\u30b3\u30f3\u30c6\u30ca\u306e\u5171\u5b58\u74b0\u5883\u306f\u6df7\u4e71\u306e\u8981\u56e0\u306b\u306a\u308b\u3002<\/p>\n

\u3069\u3093\u306aOS\u3067\u3082\u3001\u30b3\u30f3\u30c6\u30ca\u5185\u3067\u306f\u7a3c\u50cd\u3059\u308b\u305f\u3081\u306b\u306fuid=0\uff08root\u6a29\u9650\uff09\u3092\u6301\u3064\u5fc5\u8981\u304c\u3042\u308b\u3002\u3057\u304b\u3057\u3001\u305d\u306e\u307e\u307e\u3060\u3068\u30b3\u30f3\u30c6\u30ca\u5185\u306eOS\u304c\u5916\u90e8\u306e\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u3092\u30a2\u30af\u30bb\u30b9\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u30a2\u30af\u30bb\u30b9\u6a29\u9650\u30a8\u30e9\u30fc\u3092\u53d7\u3051\u308b\u7d50\u679c\u306b\u306a\u308b\u3002\u30b3\u30f3\u30c6\u30ca\u30a4\u30e1\u30fc\u30b8\u4e0a\u306eID\u304c\u5168\u304f\u30de\u30c3\u30d4\u30f3\u30b0\u3055\u308c\u3066\u5c45\u306a\u3044\u306e\u3067\u5916\u90e8\u304b\u3089\u306f\u8ab0\u306e\u3082\u306e\u306a\u306e\u304b\u304c\u308f\u304b\u3089\u306a\u3044\u304b\u3089\u3067\u3042\u308b\u3002<\/p>\n

\u3068\u3044\u3046\u4e8b\u3067\u3001\u30b3\u30f3\u30c6\u30ca\u306b\u306f\u6a29\u9650\u306e\u4ed8\u4e0e\u304c\u5fc5\u8981\u306b\u306a\u308b\u3001\u3068\u3044\u3046\u4e8b\u306b\u7e4b\u304c\u308b\u3002\u3057\u304b\u3057\u3001\u5358\u7d14\u306b\u30b3\u30f3\u30c6\u30ca\u306busername\u306eroot\u3067\u306f\u306a\u304f\u3001\u30b7\u30b9\u30c6\u30e0\u306eroot\u6a29\u9650\u3092\u4e0e\u3048\u308b\u308f\u3051\u306b\u306f\u3044\u304b\u306a\u3044\u3002\u5916\u90e8\u304b\u3089\u6765\u305f\u30b3\u30f3\u30c6\u30ca\u306b\u7121\u6761\u4ef6\u306b\u30db\u30b9\u30c8\u306eroot\u6a29\u9650\u3092\u3042\u3052\u308b\u308f\u3051\u306b\u306f\u3044\u304b\u306a\u3044\u304b\u3089\u3067\u3042\u308b\u3002\u305f\u3068\u3048\u3001\u4e00\u90e8\u306e\u6a29\u9650\u3092\u63d0\u4f9b\u3057\u305f\u3068\u3057\u3066\u3082\uff08\u4e00\u90e8\u306e\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3001\u7b49\uff09\u3001\u5927\u4e8b\u306a\u30d5\u30a1\u30a4\u30eb\u306e\u524a\u9664\u306a\u3069\u306e\u88ab\u5bb3\u3092\u88ab\u308b\u4e8b\u304c\u7c21\u5358\u306b\u8d77\u304d\u308b\u3002<\/p>\n

2016\/10\u306b\u3001Linux 4.8<\/a>\u304c\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u3001super block user namespace\uff08\u5909\u6570\u540d\uff1as_user_ns\uff09\u3068\u547c\u3070\u308c\u308b\u6a5f\u80fd\u304c\u767a\u8868\u3055\u308c\u305f\u3002\u3053\u308c\u306f\u3001Red Hat\u793e\u306e\u30a8\u30f3\u30b8\u30cb\u30a2\u3067Eric Biederman<\/a>\u6c0f\u304c\u958b\u767a\u3057\u305f\u3082\u306e\u3002s_user_ns \u306f\u3001\u30b3\u30f3\u30c6\u30ca\u5185\u306euser namespace\u4e0a\u306euid\u3092\u4fdd\u6301\u3057\u3001fuid\u30b9\u30da\u30fc\u30b9\u3067\u306e\u4f7f\u7528\u3067\u304d\u308b\u69d8\u306b\u3059\u308b\u3002Bottomley\u6c0f\u306b\u3088\u308b\u3068\u3001\u3053\u308c\u306b\u3088\u308a\u7279\u5b9a\u306e\u30b3\u30f3\u30c6\u30ca\u30a4\u30e1\u30fc\u30b8\u304b\u3089\u5b89\u5168\u306b\u30d5\u30a1\u30a4\u30eb\u306e\u5b9f\u884c\u3084\u5909\u66f4\u304c\u53ef\u80fd\u306b\u306a\u308b\u3001\u3068\u306e\u3053\u3068\u3002<\/p>\n

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\u3053\u308c\u306b\u306f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u4e0a\u306e\u5371\u967a\u6027\u304c\u4f34\u3046\u3002\u30aa\u30fc\u30b1\u30b9\u30c8\u30ec\u30fc\u30b7\u30e7\u30f3\u30ec\u30a4\u30e4\u30fc\u3067\u3053\u306e\u30e1\u30ab\u30cb\u30ba\u30e0\u3092\u6ce8\u610f\u6df1\u304f\u7ba1\u7406\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u305f\u3081\u3001\u30aa\u30fc\u30b1\u30b9\u30c8\u30ec\u30fc\u30b7\u30e7\u30f3\u30ec\u30a4\u30e4\u30fc\u306b\u5bfe\u3057\u3066\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u4e0a\u306e\u4fe1\u7528\u304c\u3042\u3063\u3066\u521d\u3081\u3066\u3053\u306e\u4ed5\u7d44\u307f\u304c\u6210\u7acb\u3059\u308b\u3001\u3068\u3044\u3046\u3053\u3068\u3067\u3042\u308b\u3002<\/p>\n

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