{"id":42437,"date":"2021-05-26T10:00:54","date_gmt":"2021-05-26T01:00:54","guid":{"rendered":"https:\/\/www.creationline.com\/?p=42437"},"modified":"2021-09-22T17:51:13","modified_gmt":"2021-09-22T08:51:13","slug":"kubernetes%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e8%aa%8d%e8%a8%bc%e3%81%ae%e6%94%b9%e5%96%84%ef%bc%9a%e3%80%8csystemmasters%e3%80%8d%e3%81%af%e9%81%bf%e3%81%91%e3%81%be%e3%81%97%e3%82%87%e3%81%86-aqu","status":"publish","type":"post","link":"https:\/\/www.creationline.com\/tech-blog\/cloudnative\/aquasecurity\/42437","title":{"rendered":"Kubernetes\u306b\u304a\u3051\u308b\u8a8d\u8a3c\u306e\u6539\u5584\uff1a\u300csystem:masters\u300d\u306f\u907f\u3051\u307e\u3057\u3087\u3046 #aqua #\u30b3\u30f3\u30c6\u30ca #\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3 #k8s"},"content":{"rendered":"<p>\u672c\u30d6\u30ed\u30b0\u306f\u300cAqua Security\u300d\u793e\u306e\u6280\u8853\u30d6\u30ed\u30b0\u30672021\u5e745\u670820\u65e5\u306b\u516c\u958b\u3055\u308c\u305f\u300c<a href=\"https:\/\/blog.aquasec.com\/kubernetes-authorization\" rel=\"nofollow noopener noreferrer\" target=\"_blank\"> Improving Your Kubernetes Authorization: Don\u2019t Use system:masters <\/a>\u300d\u306e\u65e5\u672c\u8a9e\u7ffb\u8a33\u3067\u3059\u3002<\/p>\n<p><center><img loading=\"lazy\" decoding=\"async\" src=\"\/tech-blog\/cms_x3GWkuX\/wp-content\/uploads\/2021\/05\/3a65fa67eecc3b718fff22aea420d6a4.png\" alt=\"\" width=\"865\" height=\"418\" class=\"alignnone size-full wp-image-42438\" srcset=\"https:\/\/www.creationline.com\/tech-blog\/cms_x3GWkuX\/wp-content\/uploads\/2021\/05\/3a65fa67eecc3b718fff22aea420d6a4.png 865w, https:\/\/www.creationline.com\/tech-blog\/cms_x3GWkuX\/wp-content\/uploads\/2021\/05\/3a65fa67eecc3b718fff22aea420d6a4-360x174.png 360w, https:\/\/www.creationline.com\/tech-blog\/cms_x3GWkuX\/wp-content\/uploads\/2021\/05\/3a65fa67eecc3b718fff22aea420d6a4-768x371.png 768w\" sizes=\"auto, (max-width: 865px) 100vw, 865px\" \/><\/center><\/p>\n<h2>Kubernetes\u306b\u304a\u3051\u308b\u8a8d\u8a3c\u306e\u6539\u5584\uff1a\u300csystem:masters\u300d\u306f\u907f\u3051\u307e\u3057\u3087\u3046<\/h2>\n<hr \/>\n<p>Kubernetes\u30af\u30e9\u30b9\u30bf\u30fc\u3092\u904b\u7528\u3059\u308b\u969b\u306b\u91cd\u8981\u306a\u306e\u306f\u3001\u8a8d\u8a3c\u30e2\u30c7\u30eb\u3092\u9069\u6b63\u306b\u3057\u3066\u3001\u30e6\u30fc\u30b6\u304c\u5f79\u5272\u3092\u679c\u305f\u3059\u305f\u3081\u306b\u5fc5\u8981\u306a\u6700\u5c0f\u9650\u306e\u6a29\u9650\u3092\u63d0\u4f9b\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u305d\u306e\u305f\u3081\u3001cluster-admin \u6a29\u9650\u306f\u6c7a\u3057\u3066\u4f7f\u7528\u3059\u3079\u304d\u3067\u306f\u306a\u304f\u3001\u7d44\u307f\u8fbc\u307f\u30b0\u30eb\u30fc\u30d7 system:masters \u306e\u4f7f\u7528\u306f\u7279\u306b\u907f\u3051\u308b\u3079\u304d\u3067\u3059\u3002<\/p>\n<h3>system:masters\u3068\u306f<\/h3>\n<p>\u307b\u3068\u3093\u3069\u306e Kubernetes \u30c7\u30a3\u30b9\u30c8\u30ea\u30d3\u30e5\u30fc\u30b7\u30e7\u30f3\u306b\u306f\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u3044\u304f\u3064\u304b\u306e ClusterRole \u3068 Role \u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306e Role \u306f\u3001\u30b7\u30b9\u30c6\u30e0\u306e\u30e6\u30fc\u30b6\u306b\u4e00\u822c\u7684\u306a\u30d1\u30fc\u30df\u30c3\u30b7\u30e7\u30f3\u306e\u30bb\u30c3\u30c8\u3092\u63d0\u4f9b\u3057\u3001\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u3084\u4ed6\u306e\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u30d7\u30ec\u30fc\u30f3\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3067\u4f7f\u7528\u3055\u308c\u308b\u30d1\u30fc\u30df\u30c3\u30b7\u30e7\u30f3\u3082\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p>\n<p>\u3057\u304b\u3057\u3001\u3053\u308c\u3089\u306b\u52a0\u3048\u3066\u3001Kubernetes \u3067\u4f7f\u7528\u3055\u308c\u308b\u3044\u304f\u3064\u304b\u306e\u7d44\u307f\u8fbc\u307f\u30b0\u30eb\u30fc\u30d7\u304c\u3042\u308a\u307e\u3059\u3002\u6700\u521d\u306e2\u3064\u306f\u6bd4\u8f03\u7684\u308f\u304b\u308a\u3084\u3059\u3044\u3082\u306e\u3067\u3001system:unauthenticated \u306f Kubernetes API \u306b\u5bfe\u3059\u308b\u533f\u540d\u306e\u6a29\u9650\u3092\u63d0\u4f9b\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u3001system:authenticated \u306f\u3059\u3079\u3066\u306e\u8a8d\u8a3c\u6e08\u307f\u30e6\u30fc\u30b6\u306b\u6a29\u9650\u3092\u63d0\u4f9b\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\u3053\u3053\u3067\u30013\u3064\u76ee\u306e\u7d44\u307f\u8fbc\u307f\u30b0\u30eb\u30fc\u30d7\u3067\u3042\u308b system:masters \u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u304c\u3001\u3053\u308c\u306f\u5c11\u3057\u7570\u306a\u308b\u6271\u3044\u306b\u306a\u308a\u307e\u3059\u3002system:masters \u306f\u3001Kubernetes API \u30b5\u30fc\u30d0\u306e\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u306b\u30cf\u30fc\u30c9\u30b3\u30fc\u30c9\u3055\u308c\u3066\u3044\u308b\u30b0\u30eb\u30fc\u30d7\u3067\u3001Kubernetes API \u30b5\u30fc\u30d0\u306b\u5bfe\u3059\u308b\u7121\u5236\u9650\u306e\u6a29\u9650\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<h3>\u306a\u305c system:masters \u306e\u5229\u7528\u3092\u907f\u3051\u308b\u3079\u304d\u306a\u306e\u304b<\/h3>\n<p>\u3053\u306e\u30b0\u30eb\u30fc\u30d7\u306e\u30e1\u30f3\u30d0\u30fc\u3067\u3042\u308b\u30e6\u30fc\u30b6\u306f\u3001\u30af\u30e9\u30b9\u30bf\u30fc\u306b\u5bfe\u3059\u308b\u5b8c\u5168\u306a\u30af\u30e9\u30b9\u30bf\u30fc\u7ba1\u7406\u8005\u306e\u6a29\u9650\u3092\u6301\u3061\u307e\u3059\u3002\u3059\u3079\u3066\u306e ClusterRole \u3084 Role \u304c\u30af\u30e9\u30b9\u30bf\u30fc\u304b\u3089\u524a\u9664\u3055\u308c\u3066\u3082\u3001\u3053\u306e\u30b0\u30eb\u30fc\u30d7\u306e\u30e1\u30f3\u30d0\u30fc\u3067\u3042\u308b\u30e6\u30fc\u30b6\u306f\u30af\u30e9\u30b9\u30bf\u30fc\u3078\u306e\u5b8c\u5168\u306a\u30a2\u30af\u30bb\u30b9\u6a29\u3092\u4fdd\u6301\u3057\u307e\u3059\u3002<\/p>\n<p>\u3053\u308c\u3089\u306e\u30af\u30e9\u30b9\u30bf\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u30e6\u30fc\u30b6\u306f system:masters \u306e\u30e1\u30f3\u30d0\u30fc\u3067\u3042\u308b\u305f\u3081\u3001<a href=\"https:\/\/kind.sigs.k8s.io\/\" rel=\"noopener\" target=\"_blank\">kind<\/a> \u3067\u3053\u306e\u30a2\u30af\u30bb\u30b9\u3092\u5b9f\u6f14\u3067\u304d\u307e\u3059\u3002(\u203b\u7834\u58ca\u3057\u3066\u3082\u554f\u984c\u306a\u3044\u30c6\u30b9\u30c8\u74b0\u5883\u4ee5\u5916\u3067\u306f\u5b9f\u884c\u3057\u306a\u3044\u3067\u304f\u3060\u3055\u3044)\u307e\u305a\u3001\u6b21\u306e\u30b3\u30de\u30f3\u30c9\u3067\u3059\u3079\u3066\u306e ClusterRole \u3092\u524a\u9664\u3057\u307e\u3059\u3002<br \/>\n<span style=\"font-family: 'Courier New', Courier, monospace; font-size: 18px; background-color: #eeeeee;\">kubectl delete clusterroles.rbac.authorization.k8s.io --all<\/span><\/p>\n<p>\u305d\u3057\u3066\u3001\u6b21\u306e\u30b3\u30de\u30f3\u30c9\u3092\u4f7f\u3063\u3066\u3001\u5ff5\u306e\u305f\u3081\u306b kube-system \u30cd\u30fc\u30e0\u30b9\u30da\u30fc\u30b9\u306e\u3059\u3079\u3066\u306e Role \u3092\u524a\u9664\u3057\u307e\u3059\u3002<br \/>\n<span style=\"font-family: 'Courier New', Courier, monospace; background-color: #eeeeee; font-size: 18px;\">kubectl -n kube-system delete roles --all<\/span><\/p>\n<p>\u3053\u306e\u6642\u70b9\u3067\u306f\u3001\u30af\u30e9\u30b9\u30bf\u30fc\u306b\u5bfe\u3059\u308b\u6a29\u9650\u3092\u4e0e\u3048\u308b RBAC \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u6a29\u9650\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081\u306b\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001\u30af\u30e9\u30b9\u30bf\u30fc\u306b\u5bfe\u3059\u308b\u5168\u3066\u306e\u6a29\u9650\u304c\u6b8b\u3063\u3066\u3044\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<br \/>\n<span style=\"font-family: 'Courier New', Courier, monospace; color: #000000; background-color: #eeeeee; font-size: 18px;\">kubectl auth can-i --list<\/span><\/p>\n<div data-hs-responsive-table=\"true\" style=\"overflow-x: auto; max-width: 100%; width: 90%; margin-left: auto; margin-right: auto;\">\n<table border=\"1\" cellpadding=\"4\" style=\"width: 100%; border-color: #EEEEEE; border-style: solid; border-collapse: collapse; table-layout: fixed; height: 196px;\">\n<tbody>\n<tr style=\"height: 63px;\">\n<td style=\"width: 25%; text-align: center; height: 63px; border-color: #FFFFFF; background-color: #1904da;\"><span style=\"color: #ffffff;\">Resources<\/span><\/td>\n<td style=\"width: 25%; text-align: center; height: 63px; border-color: #FFFFFF; background-color: #1904da;\"><span style=\"color: #ffffff;\">Non-Resource URLs&nbsp;<\/span><\/td>\n<td style=\"width: 25%; text-align: center; height: 63px; border-color: #FFFFFF; background-color: #1904da;\"><span style=\"color: #ffffff;\">Resource Names<\/span><\/td>\n<td style=\"width: 25%; text-align: center; height: 63px; border-color: #FFFFFF; background-color: #1904da;\"><span style=\"color: #ffffff;\">Verbs<\/span><\/td>\n<\/tr>\n<tr style=\"height: 57px;\">\n<td style=\"width: 25%; text-align: center; height: 57px; border-color: #FFFFFF; background-color: #ebf3fa;\"><strong>*.*&nbsp;<\/strong><\/td>\n<td style=\"width: 25%; text-align: center; height: 57px; border-color: #FFFFFF; background-color: #ebf3fa;\"><strong>[]&nbsp;&nbsp;<\/strong><\/td>\n<td style=\"width: 25%; text-align: center; height: 57px; border-color: #FFFFFF; background-color: #ebf3fa;\"><strong>[]&nbsp;<\/strong><\/td>\n<td style=\"width: 25%; text-align: center; height: 57px; border-color: #FFFFFF; background-color: #ebf3fa;\"><strong>[*]<\/strong><\/td>\n<\/tr>\n<tr style=\"height: 76px;\">\n<td style=\"width: 25%; text-align: center; height: 76px; border-color: #FFFFFF; background-color: #ebf3fa;\">&nbsp;<\/td>\n<td style=\"width: 25%; text-align: center; height: 76px; border-color: #FFFFFF; background-color: #ebf3fa;\"><strong>[*]&nbsp;<\/strong><\/td>\n<td style=\"width: 25%; text-align: center; height: 76px; border-color: #FFFFFF; background-color: #ebf3fa;\"><strong>[]&nbsp;<\/strong><\/td>\n<td style=\"width: 25%; text-align: center; height: 76px; border-color: #FFFFFF; background-color: #ebf3fa;\"><strong>[*]<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>\u307e\u305f\u3001Kubernetes \u5185\u8535\u306e RBAC \u30b7\u30b9\u30c6\u30e0\u306e\u4ee3\u308f\u308a\u306b\u3001Webhook \u306b\u3088\u308b\u8a8d\u8a3c\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u3067\u3082\u3001\u3053\u306e\u30b0\u30eb\u30fc\u30d7\u306e\u30e1\u30f3\u30d0\u30fc\u306b\u3088\u308b\u30a2\u30af\u30bb\u30b9\u8981\u6c42\u306f Webhook \u306b\u9001\u4fe1\u3055\u308c\u306a\u3044\u305f\u3081\u3001\u540c\u3058\u72b6\u614b\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>system:masters \u306e\u30e1\u30f3\u30d0\u30fc\u30b7\u30c3\u30d7\u306f\u3001Kubernetes \u306e\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u8a3c\u660e\u66f8\u8a8d\u8a3c\u30e2\u30c7\u30eb\u3068\u7d44\u307f\u5408\u308f\u305b\u305f\u5834\u5408\u306b\u7279\u306b\u5371\u967a\u3067\u3059\u3002\u3068\u3044\u3046\u306e\u3082\u3001Kubernetes \u306f\u73fe\u5728\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u8a3c\u660e\u66f8\u3092\u5931\u52b9\u3055\u305b\u308b\u30e1\u30ab\u30cb\u30ba\u30e0\u3092\u63d0\u4f9b\u3057\u3066\u3044\u306a\u3044\u304b\u3089\u3067\u3059\u3002\u3064\u307e\u308a\u3001system:masters \u306e\u30b0\u30eb\u30fc\u30d7\u540d\u3067\u767a\u884c\u3055\u308c\u305f\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u8a3c\u660e\u66f8\u30d9\u30fc\u30b9\u306e\u30af\u30ec\u30c7\u30f3\u30b7\u30e3\u30eb\u306f\u3001\u7c21\u5358\u306b\u306f\u524a\u9664\u3067\u304d\u306a\u3044 Kubernetes API \u3078\u306e\u30d5\u30eb\u30a2\u30af\u30bb\u30b9\u3092\u6301\u3064\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u653b\u6483\u8005\u304c\u3053\u306e\u30af\u30ec\u30c7\u30f3\u30b7\u30e3\u30eb\u306b\u30a2\u30af\u30bb\u30b9\u3057\u305f\u5834\u5408\u3001\u5f7c\u3089\u306f\u74b0\u5883\u3078\u306e\u9577\u671f\u306b\u308f\u305f\u308b\u30af\u30e9\u30b9\u30bf\u30fc\u7ba1\u7406\u8005\u30ec\u30d9\u30eb\u306e\u30a2\u30af\u30bb\u30b9\u6a29\u3092\u6301\u3064\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3>system:masters\u3092\u3069\u3046\u53d6\u308a\u6271\u3046\u3079\u304d\u304b<\/h3>\n<p>\u30af\u30e9\u30b9\u30bf\u30fc\u3067\u53d6\u308b\u3079\u304d\u30a2\u30af\u30b7\u30e7\u30f3\u306e\u6700\u521d\u306e\u30b9\u30c6\u30c3\u30d7\u306f\u3001\u3059\u3079\u3066\u306e\u30e6\u30fc\u30b6\u3092\u3053\u306e\u30b0\u30eb\u30fc\u30d7\u306e\u30e1\u30f3\u30d0\u30fc\u306b\u3057\u306a\u3044\u3053\u3068\u3067\u3059\u3002\u8ab0\u304b\u306b\u30af\u30e9\u30b9\u30bf\u30fc\u7ba1\u7406\u8005\u306e\u6a29\u9650\u3092\u4e0e\u3048\u308b\u5fc5\u8981\u304c\u3042\u308b(\u3053\u308c\u306f\u614e\u91cd\u306b\u4f7f\u7528\u3059\u3079\u304d\u3067\u3059\u304c)\u5834\u5408\u3001\u7d44\u307f\u8fbc\u307f\u306e cluster-admin ClusterRole \u306b ClusterRoleBinding \u3092\u4f5c\u6210\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306f system:masters \u3092\u4f7f\u7528\u3059\u308b\u306e\u3068\u540c\u3058\u52b9\u679c\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066 ClusterRoleBinding \u304b\u3089\u30e6\u30fc\u30b6\u3092\u524a\u9664\u3059\u308b\u3053\u3068\u3067\u3001\u3053\u308c\u3089\u306e\u6a29\u5229\u3092\u524a\u9664\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u6b21\u306b\u78ba\u8a8d\u3059\u3079\u304d\u30dd\u30a4\u30f3\u30c8\u306f\u3001\u4f7f\u7528\u3057\u3066\u3044\u308b Kubernetes \u30c7\u30a3\u30b9\u30c8\u30ea\u30d3\u30e5\u30fc\u30b7\u30e7\u30f3\u304c\u3069\u306e\u3088\u3046\u306b system:masters \u3092\u5229\u7528\u3057\u3066\u3044\u308b\u304b\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002\u591a\u304f\u306e\u30c7\u30a3\u30b9\u30c8\u30ea\u30d3\u30e5\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30af\u30e9\u30b9\u30bf\u30fc\u306e\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u306e\u4e00\u74b0\u3068\u3057\u3066 bootstrap \u30e6\u30fc\u30b6\u304c\u4f5c\u6210\u3055\u308c\u3001\u3053\u306e\u30b0\u30eb\u30fc\u30d7\u306e\u30e1\u30f3\u30d0\u30fc\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001kubeadm \u3084\u305d\u308c\u3092\u30d9\u30fc\u30b9\u306b\u3057\u305f\u30c7\u30a3\u30b9\u30c8\u30ea\u30d3\u30e5\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u306e\u4e00\u74b0\u3068\u3057\u3066 admin.conf \u3068\u3044\u3046\u30d5\u30a1\u30a4\u30eb\u304c\u4f5c\u6210\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u8a3c\u660e\u66f8\u30d9\u30fc\u30b9\u306e\u30af\u30ec\u30c7\u30f3\u30b7\u30e3\u30eb\u3067\u3001system:masters \u30b0\u30eb\u30fc\u30d7\u306b\u5c5e\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u30d5\u30a1\u30a4\u30eb\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u614e\u91cd\u306b\u5236\u5fa1\u3059\u308b\u3053\u3068\u304c\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002\u3053\u306e\u30d5\u30a1\u30a4\u30eb\u306f\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u6709\u52b9\u671f\u9593\u304c1\u5e74\u306e\u4e00\u822c\u7684\u306a\u30d0\u30c3\u30af\u30c9\u30a2\u30e6\u30fc\u30b6\u3067\u3042\u308b\u305f\u3081\u3067\u3059\u3002<a href=\"https:\/\/kubernetes.io\/docs\/setup\/production-environment\/tools\/kubeadm\/create-cluster-kubeadm\/#more-information\" rel=\"noopener\" target=\"_blank\">kubeadm \u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8<\/a>\u306b\u8a18\u8f09\u3055\u308c\u3066\u3044\u308b\u3088\u3046\u306b\u3001\u3053\u306e\u30d5\u30a1\u30a4\u30eb\u306f\u30d5\u30eb\u6a29\u9650\u304c\u4e0e\u3048\u3089\u308c\u3066\u3044\u308b\u306e\u3067\u3001\u4e00\u822c\u7684\u306a\u30af\u30e9\u30b9\u30bf\u30fc\u7ba1\u7406\u306b\u3066\u5b89\u6613\u306b\u4f7f\u7528\u3057\u3066\u306f\u3044\u3051\u307e\u305b\u3093\u3002<\/p>\n<h2>\u307e\u3068\u3081<\/h2>\n<hr \/>\n<p>Kubernetes \u306e\u8a8d\u8a3c\u30fb\u8a8d\u53ef\u30e2\u30c7\u30eb\u306b\u306f\u3001\u30af\u30e9\u30b9\u30bf\u30fc\u3092\u8a2d\u8a08\u30fb\u904b\u7528\u3059\u308b\u969b\u306b\u7406\u89e3\u3057\u3066\u304a\u304f\u3079\u304d\u30b1\u30fc\u30b9\u304c\u6570\u591a\u304f\u3042\u308a\u307e\u3059\u3002\u30af\u30e9\u30b9\u30bf\u30fc\u3078\u306e\u4e0d\u6b63\u30a2\u30af\u30bb\u30b9\u306e\u30ea\u30b9\u30af\u3092\u4f4e\u6e1b\u3059\u308b\u305f\u3081\u306b\u306f\u3001system:masters \u30b0\u30eb\u30fc\u30d7\u306e\u30e1\u30f3\u30d0\u30fc\u3068\u3057\u3066\u4f5c\u6210\u3055\u308c\u305f\u3082\u306e\u306a\u3069\u3001\u9ad8\u3044\u6a29\u9650\u306e\u8a8d\u8a3c\u60c5\u5831\u3092\u614e\u91cd\u306b\u7ba1\u7406\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n<p><center>\n\t\t<!--HubSpot Call-to-Action Code -->\n\t\t<span class=\"hs-cta-wrapper\" id=\"hs-cta-wrapper-fecc193b-bbc5-40d2-9588-ed7b022af3aa\">\n\t\t<span class=\"hs-cta-node hs-cta-fecc193b-bbc5-40d2-9588-ed7b022af3aa\" id=\"fecc193b-bbc5-40d2-9588-ed7b022af3aa\">\n\t\t<!--[if lte IE 8]>\n\t\t<div id=\"hs-cta-ie-element\"><\/div>\n\t\t<![endif]-->\n\t\t<a href=\"https:\/\/cta-redirect.hubspot.com\/cta\/redirect\/6168413\/fecc193b-bbc5-40d2-9588-ed7b022af3aa\" >\n\t\t<img decoding=\"async\" class=\"hs-cta-img\" id=\"hs-cta-img-fecc193b-bbc5-40d2-9588-ed7b022af3aa\" style=\"border-width:0px;\" src=\"https:\/\/no-cache.hubspot.com\/cta\/default\/6168413\/fecc193b-bbc5-40d2-9588-ed7b022af3aa.png\"  alt=\"New call-to-action\"\/>\n\t\t<\/a>\n\t\t<\/span>\n\t\t<script charset=\"utf-8\" src=\"\/\/js.hubspot.com\/cta\/current.js\"><\/script>\n\t\t<script>\n\t\thbspt.cta.load(6168413, 'fecc193b-bbc5-40d2-9588-ed7b022af3aa', {});\n\t\t<\/script>\n\t\t<\/span>\n\t\t<!-- end HubSpot Call-to-Action Code -->\n\t\t<\/center><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u672c\u30d6\u30ed\u30b0\u306f\u300cAqua Security\u300d\u793e\u306e\u6280\u8853\u30d6\u30ed\u30b0\u30672021\u5e745\u670820\u65e5\u306b\u516c\u958b\u3055\u308c\u305f\u300c Improving Your Kubernetes Authorization: Don\u2019t Use system:master [&#8230;]<\/p>\n","protected":false},"author":56,"featured_media":42438,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","footnotes":""},"categories":[176,122],"tags":[174,152,123,112,286,358],"class_list":["post-42437","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-aquasecurity","category-kubernetes","tag-aqua","tag-aquasecurity","tag-k8s","tag-kubernetes","tag-286","tag-358"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Kubernetes\u306b\u304a\u3051\u308b\u8a8d\u8a3c\u306e\u6539\u5584\uff1a\u300csystem:masters\u300d\u306f\u907f\u3051\u307e\u3057\u3087\u3046 #aqua #\u30b3\u30f3\u30c6\u30ca #\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3 #k8s - Tech Blog\uff5c\u30af\u30ea\u30a8\u30fc\u30b7\u30e7\u30f3\u30e9\u30a4\u30f3<\/title>\n<meta name=\"description\" content=\"AquaSecurity, Kubernetes |\u672c\u30d6\u30ed\u30b0\u306f\u300cAqua Security\u300d\u793e\u306e\u6280\u8853\u30d6\u30ed\u30b0\u30672021\u5e745\u670820\u65e5\u306b\u516c\u958b\u3055\u308c\u305f\u300c Improving Your Kubernetes\" \/>\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\/aquasecurity\/42437\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Kubernetes\u306b\u304a\u3051\u308b\u8a8d\u8a3c\u306e\u6539\u5584\uff1a\u300csystem:masters\u300d\u306f\u907f\u3051\u307e\u3057\u3087\u3046 #aqua #\u30b3\u30f3\u30c6\u30ca #\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3 #k8s - Tech Blog\uff5c\u30af\u30ea\u30a8\u30fc\u30b7\u30e7\u30f3\u30e9\u30a4\u30f3\" \/>\n<meta property=\"og:description\" content=\"AquaSecurity, Kubernetes |\u672c\u30d6\u30ed\u30b0\u306f\u300cAqua Security\u300d\u793e\u306e\u6280\u8853\u30d6\u30ed\u30b0\u30672021\u5e745\u670820\u65e5\u306b\u516c\u958b\u3055\u308c\u305f\u300c Improving Your Kubernetes\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.creationline.com\/tech-blog\/cloudnative\/aquasecurity\/42437\" \/>\n<meta property=\"og:site_name\" content=\"Tech Blog\uff5c\u30af\u30ea\u30a8\u30fc\u30b7\u30e7\u30f3\u30e9\u30a4\u30f3\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/creationline\" \/>\n<meta property=\"article:published_time\" content=\"2021-05-26T01:00:54+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2021-09-22T08:51:13+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.creationline.com\/tech-blog\/cms_x3GWkuX\/wp-content\/uploads\/2021\/05\/3a65fa67eecc3b718fff22aea420d6a4.png\" \/>\n\t<meta property=\"og:image:width\" content=\"865\" \/>\n\t<meta property=\"og:image:height\" content=\"418\" 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