{"id":83183,"date":"2026-03-25T08:00:00","date_gmt":"2026-03-24T23:00:00","guid":{"rendered":"https:\/\/www.creationline.com\/tech-blog\/?p=83183"},"modified":"2026-03-26T13:54:56","modified_gmt":"2026-03-26T04:54:56","slug":"apparmor-ubuntu-23-10%e4%bb%a5%e9%99%8d%e3%81%a7%e3%81%af%e9%9d%9e%e7%89%b9%e6%a8%a9%e3%83%a6%e3%83%bc%e3%82%b6%e3%83%bc%e3%81%aeuser-namespace%e4%bd%9c%e6%88%90%e3%81%ab%e5%88%b6%e9%99%90%e3%81%8c","status":"publish","type":"post","link":"https:\/\/www.creationline.com\/tech-blog\/cloudnative\/docker\/83183","title":{"rendered":"[AppArmor] Ubuntu 23.10\u4ee5\u964d\u3067\u306f\u975e\u7279\u6a29\u30e6\u30fc\u30b6\u30fc\u306euser namespace\u4f5c\u6210\u306b\u5236\u9650\u304c\u3042\u308b"},"content":{"rendered":"\n<p>Ubuntu 22.04 \u304b\u3089 24.04 \u306b\u30a2\u30c3\u30d7\u30b0\u30ec\u30fc\u30c9\u3059\u308b\u6a5f\u4f1a\u304c\u3042\u3063\u305f\u306e\u3067\u3059\u304c\u3001\u305d\u306e\u969b\u306buser namespace\u5468\u308a\u306e\u554f\u984c\u304c\u767a\u751f\u3057\u305f\u306e\u3067\u8abf\u67fb\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u53c2\u8003\u6587\u732e<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Jacob, 2024, \u300c\u2018unshare -r\u2019 on ubuntu 24.04,&nbsp;23.10\u300d, <a href=\"https:\/\/nitrojacob.wordpress.com\" target=\"_blank\" rel=\"noreferrer noopener\">jacob's Web<\/a>, 2026\u5e743\u670823\u65e5, <a href=\"https:\/\/nitrojacob.wordpress.com\/2024\/08\/14\/unshare-r-on-ubuntu-24-04-23-10\/\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/nitrojacob.wordpress.com\/2024\/08\/14\/unshare-r-on-ubuntu-24-04-23-10\/ <\/a><\/li>\n\n\n\n<li>AppArmor, 2026, \u300cunprivileged_userns_restriction\u300d, <a href=\"https:\/\/gitlab.com\/apparmor\/apparmor\" target=\"_blank\" rel=\"noreferrer noopener\">apparmor<\/a>, 2026\u5e743\u670824\u65e5, <a href=\"https:\/\/gitlab.com\/apparmor\/apparmor\/-\/wikis\/unprivileged_userns_restriction\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/gitlab.com\/apparmor\/apparmor\/-\/wikis\/unprivileged_userns_restriction<\/a><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">user namespace\u3063\u3066\u4f55<\/h2>\n\n\n\n<p>\u8a73\u7d30\u306b\u3064\u3044\u3066\u306f<a href=\"https:\/\/www.man7.org\/linux\/man-pages\/man7\/user_namespaces.7.html\" target=\"_blank\" rel=\"noreferrer noopener\">man page<\/a>\u3092\u53c2\u7167\u3057\u3066\u3044\u305f\u3060\u304f\u3068\u3057\u3066\u3001\u7c21\u5358\u306b\u8aac\u660e\u3057\u307e\u3059\u3002user namespace\u306fLinux\u306e\u6a5f\u80fd\u306e1\u3064\u3067\u3001UID\u304a\u3088\u3073GID\u306e\u540d\u524d\u7a7a\u9593\u3092\u5206\u96e2\u3059\u308b\u6a5f\u80fd\u3092\u6301\u3061\u307e\u3059\u3002AppArmor\u306a\u3069\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30e2\u30b8\u30e5\u30fc\u30eb\u3067\u5236\u9650\u3055\u308c\u3066\u3044\u306a\u3044\u9650\u308a\u3001\u975e\u7279\u6a29\u30e6\u30fc\u30b6\u30fc\u3067\u3082\u6b21\u306e\u30b3\u30de\u30f3\u30c9\u3067user namespace\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059:<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"bash\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">id # uid=1000(user) gid=1000(user) groups=1000(user)\nunshare --map-user=10000 --map-group=10000 # user namespace \u3092\u4f5c\u6210\u3059\u308b\nid # uid=10000 gid=10000 groups=10000,65534(nogroup)<\/pre>\n\n\n\n<p><code>unshare<\/code> \u306e\u5b9f\u884c\u524d\u5f8c\u3067UID\u3068GID\u304c\u5909\u308f\u3063\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306f <code>unshare<\/code> \u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u305f\u3053\u3068\u306b\u3088\u308a\u3001\u65b0\u3057\u3044 user namespace \u304c\u4f5c\u6210\u3055\u308c\u3001\u305d\u306e\u4e2d\u3067\u30b7\u30a7\u30eb\u304c UID=10000, GID=10000 \u3067\u8d77\u52d5\u3057\u305f\u305f\u3081\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u540c\u69d8\u306b\u3057\u3066\u3001\u65b0\u3057\u3044 user namespace \u3067 UID=0 \u3092\u7372\u5f97\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059:<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"bash\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">id # uid=1000(user) gid=1000(user) groups=1000(user)\nunshare -Ur # user namespace \u3092\u4f5c\u6210\u3057\u3001\u305d\u306e\u4e2d\u3067root\u30e6\u30fc\u30b6\u30fc\u306b\u306a\u308b\nid # uid=0(root) gid=0(root) groups=0(root),65534(nogroup)<\/pre>\n\n\n\n<p>\u3053\u306enamespace\u5185\u3067\u306eroot\u30e6\u30fc\u30b6\u30fc\u306f\u3001\u672c\u6765\u306eroot\u30e6\u30fc\u30b6\u30fc (global root\u3068\u8a00\u3044\u307e\u3059) \u3067\u306f\u306a\u3044\u305f\u3081\u3001\u6b21\u306e\u3088\u3046\u306a\u64cd\u4f5c\u306f\u5931\u6557\u3057\u307e\u3059:<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"bash\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">unshare -Ur # \u65b0\u3057\u3044user namespace\u3067root\u30e6\u30fc\u30b6\u30fc\u306b\u306a\u308b\ntouch \/root\/test # \u30a8\u30e9\u30fc<\/pre>\n\n\n\n<p>\u3057\u304b\u3057\u3001mount\u3092\u542b\u3080\u4e00\u90e8\u306e\u64cd\u4f5c\u306f\u53ef\u80fd\u3067\u3059 (\u305f\u3060\u3057 mount namespace\u3082\u4f5c\u6210\u306e\u5fc5\u8981\u3042\u308a):<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"bash\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">unshare -Urm # \u65b0\u3057\u3044user namespace\u3067root\u30e6\u30fc\u30b6\u30fc\u306b\u306a\u308a\u3001mount namespace\u3082\u4f5c\u6210\u3059\u308b\nmkdir test\nmount -t tmpfs tmpfs test<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u975e\u7279\u6a29\u30e6\u30fc\u30b6\u30fc\u306b\u3088\u308buser namespace\u4f5c\u6210\u306e\u5fdc\u7528<\/h2>\n\n\n\n<p>\u975e\u7279\u6a29\u30e6\u30fc\u30b6\u30fc\u306b\u3088\u308buser namespace\u306e\u4f5c\u6210\u306f\u3001rootless\u30b3\u30f3\u30c6\u30ca\u306e\u4f5c\u6210\u306b\u5fdc\u7528\u3055\u308c\u3066\u3044\u307e\u3057\u305f\u3002\u30b3\u30f3\u30c6\u30ca\u306e\u4f5c\u6210\u6642\u306b\u306f\u901a\u5e38\u3001\u69d8\u3005\u306a\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u306e\u30de\u30a6\u30f3\u30c8\u3092\u884c\u3044\u307e\u3059\u304c\u3001user namespace (\u3068mount namespace) \u3092\u4f5c\u308b\u3053\u3068\u3067\u3001global root\u30e6\u30fc\u30b6\u30fc\u306e\u5354\u529b\u306a\u3057\u306b\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u3092\u30de\u30a6\u30f3\u30c8\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ubuntu 23.10\u4ee5\u964d\u3067\u306e\u5909\u66f4\u70b9<\/h2>\n\n\n\n<p>Ubuntu 23.10\u4ee5\u964d\u3067\u306fAppArmor\u5468\u308a\u306e\u69cb\u6210\u304c\u5909\u66f4\u3055\u308c\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u975e\u7279\u6a29\u30e6\u30fc\u30b6\u30fc\u304cuser namespace\u3092\u4f5c\u6210\u3059\u308b\u969b\u306b\u5236\u9650\u304c\u304b\u304b\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u975e\u7279\u6a29\u30e6\u30fc\u30b6\u30fc\u304c\u5f93\u6765\u306eroot\u30e6\u30fc\u30b6\u30fc\u306b\u6e96\u3058\u308b\u64cd\u4f5c\u3092\u3067\u304d\u308b\u3053\u3068\u306b\u3088\u308a\u3001Linux\u30ab\u30fc\u30cd\u30eb\u306e\u653b\u6483\u7d4c\u8def\u304c\u5897\u3048\u3066\u3057\u307e\u3063\u3066\u3044\u305f\u304b\u3089\u306e\u3088\u3046\u3067\u3059\u3002\u5177\u4f53\u7684\u306b\u306f<a href=\"https:\/\/gitlab.com\/apparmor\/apparmor\/-\/wikis\/unprivileged_userns_restriction\" target=\"_blank\" rel=\"noreferrer noopener\">\u6b21\u306e\u5236\u9650\u306e\u3044\u305a\u308c\u304b\u304c\u304b\u304b\u308b\u3088\u3046\u3067\u3059<\/a>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u975e\u7279\u6a29\u30e6\u30fc\u30b6\u30fc\u306fuser namespace\u3092\u4f5c\u6210\u3067\u304d\u306a\u3044<\/li>\n\n\n\n<li>\u975e\u7279\u6a29\u30e6\u30fc\u30b6\u30fc\u306fuser namespace\u3092\u4f5c\u6210\u3067\u304d\u308b\u304c\u3001\u305d\u306e\u4e2d\u3067\u3067\u304d\u308b\u4f5c\u696d\u306b\u5236\u9650\u304c\u3042\u308b<\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Two types of restrictions<\/p>\n\n\n\n<p>AppArmor is capable of two styles of restrictions, denying the unprivileged unconfined from creating new user namespaces, and allow unprivileged unconfined process to create a user namespace but restricting tasks within that namespace with a default profile. The default profile is defined in policy and has reduced permissions, if the default profile is not present apparmor will fallback to denying unconfined access to unprivileged user namespaces.<\/p>\n<\/blockquote>\n\n\n\n<p>\u79c1\u306e\u74b0\u5883 (Ubuntu 24.04) \u3067\u306f\u6b21\u306e\u7d50\u679c\u306b\u306a\u308a\u307e\u3057\u305f:<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">unshare -U # OK<\/pre>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">unshare -Ur\n# unshare: write failed \/proc\/self\/uid_map: Operation not permitted<\/pre>\n\n\n\n<p>user namespace\u81ea\u4f53\u306e\u4f5c\u6210\u306f\u3067\u304d\u308b\u3088\u3046\u3067\u3059\u304c\u3001root\u30e6\u30fc\u30b6\u30fc\u306b\u306f\u306a\u308c\u306a\u3044\u3088\u3046\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u5bfe\u7b56<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">AppArmor\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3059\u308b\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u3053\u3061\u3089\u304c\u63a8\u5968\u3055\u308c\u3066\u3044\u308b\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n\n\n\n<p>\/etc\/apparmor.d\/{profile_name} \u306b\u6b21\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3057\u307e\u3059 (profile_name\u306f\u4efb\u610f\u306e\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u540d) :<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># This profile allows everything and only exists to give the\n# application a name instead of having the label \"unconfined\"\n\nabi &lt;abi\/4.0>,\ninclude &lt;tunables\/global>\n\n# \/path\/to\/executable \u306f\u3001user namespace\u306e\u5236\u9650\u3092\u9069\u7528\u3057\u305f\u304f\u306a\u3044\u5b9f\u884c\u30d5\u30a1\u30a4\u30eb\u306e\u30d1\u30b9\nprofile profile_name \/path\/to\/executable flags=(unconfined) {\n  userns,\n}\n<\/pre>\n\n\n\n<p>\u305d\u3057\u3066 <code>systemctl reload apparmor.service<\/code> \u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">AppArmor\u306e\u30ab\u30fc\u30cd\u30eb\u8a2d\u5b9a\u3092\u5909\u66f4\u3059\u308b\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u3053\u3061\u3089\u306f\u63a8\u5968\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002AppArmor\u306b\u3088\u308buser namespace\u5236\u9650\u304c\u5b8c\u5168\u306b\u7121\u52b9\u306b\u306a\u3063\u3066\u3057\u307e\u3046\u305f\u3081\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"bash\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">sudo sysctl kernel.apparmor_restrict_unprivileged_userns=0<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u611f\u60f3<\/h2>\n\n\n\n<p>\u975e\u7279\u6a29\u30e6\u30fc\u30b6\u30fc\u306b\u3088\u308buser namespace\u4f5c\u6210\u306e\u5236\u9650\u306f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u4e0a\u81f4\u3057\u65b9\u306a\u3044\u90e8\u5206\u3082\u3042\u308b\u3068\u601d\u3044\u307e\u3059\u304c\u3001Ubuntu\u3068\u3057\u3066\u306f\u7834\u58ca\u7684\u5909\u66f4\u3068\u306a\u308b\u305f\u3081\u300c\u9762\u5012\u306a\u975e\u7279\u6a29\u30b3\u30f3\u30c6\u30ca\u306f\u3084\u3081\u3088\u3046\uff01\u300d\u3068\u3001\u975e\u7279\u6a29\u30b3\u30f3\u30c6\u30ca\u304b\u3089\u7279\u6a29\u30b3\u30f3\u30c6\u30ca\u3078\u306e\u56de\u5e30\u306e\u52d5\u304d\u304c\u3042\u3063\u305f\u308a\u3001AppArmor\u81ea\u4f53\u3092\u7121\u52b9\u5316\u3059\u308b\u3088\u3046\u306a\u52d5\u304d\u304c\u3042\u3063\u305f\u308a\u3059\u308b\u3068\u672c\u672b\u8ee2\u5012\u306b\u306a\u308a\u304b\u306d\u306a\u3044\u306e\u3067\u306f\u306a\u3044\u304b\u3068\u61f8\u5ff5\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ubuntu 22.04 \u304b\u3089 24.04 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23.10\u4ee5\u964d\u3067\u306f\u975e\u7279\u6a29\u30e6\u30fc\u30b6\u30fc\u306euser namespace\u4f5c\u6210\u306b\u5236\u9650\u304c\u3042\u308b - Tech Blog\uff5c\u30af\u30ea\u30a8\u30fc\u30b7\u30e7\u30f3\u30e9\u30a4\u30f3<\/title>\n<meta name=\"description\" content=\"Docker, k-takahashi |Ubuntu 22.04 \u304b\u3089 24.04 \u306b\u30a2\u30c3\u30d7\u30b0\u30ec\u30fc\u30c9\u3059\u308b\u6a5f\u4f1a\u304c\u3042\u3063\u305f\u306e\u3067\u3059\u304c\u3001\u305d\u306e\u969b\u306buser\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.creationline.com\/tech-blog\/cloudnative\/docker\/83183\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[AppArmor] Ubuntu 23.10\u4ee5\u964d\u3067\u306f\u975e\u7279\u6a29\u30e6\u30fc\u30b6\u30fc\u306euser 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