{"id":1483,"date":"2025-06-03T18:34:03","date_gmt":"2025-06-03T09:34:03","guid":{"rendered":"https:\/\/itstudy365.com\/blog\/?p=1483"},"modified":"2025-06-03T18:34:03","modified_gmt":"2025-06-03T09:34:03","slug":"kubernetes-learning-%e7%ac%ac30%e7%ab%a0%ef%bc%9anetworkpolicy%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9-%e3%80%9cpod%e9%96%93%e9%80%9a%e4%bf%a1%e3%82%92%e5%88%b6%e5%be%a1%e3%81%99%e3%82%8b%e3%82%bb","status":"publish","type":"post","link":"https:\/\/itstudy365.com\/blog\/2025\/06\/03\/kubernetes-learning-%e7%ac%ac30%e7%ab%a0%ef%bc%9anetworkpolicy%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9-%e3%80%9cpod%e9%96%93%e9%80%9a%e4%bf%a1%e3%82%92%e5%88%b6%e5%be%a1%e3%81%99%e3%82%8b%e3%82%bb\/","title":{"rendered":"Kubernetes Learning \u7b2c30\u7ae0\uff1aNetworkPolicy\u306e\u4f7f\u3044\u65b9 \u301cPod\u9593\u901a\u4fe1\u3092\u5236\u5fa1\u3059\u308b\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u8981\u301c"},"content":{"rendered":"\n<button id=\"bb1\" type=\"button\" value=\"Play\" class=\"responsivevoice-button\" title=\"ResponsiveVoice Tap to Start\/Stop Speech\"><span>&#128266; Play<\/span><\/button>\n        <script>\n            bb1.onclick = function(){\n                if(responsiveVoice.isPlaying()){\n                    responsiveVoice.cancel();\n                }else{\n                    responsiveVoice.speak(\"Kubernetes\u30af\u30e9\u30b9\u30bf\u30fc\u3067\u306f\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f\u3059\u3079\u3066\u306ePod\u9593\u901a\u4fe1\u304c\u8a31\u53ef\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306f\u958b\u767a\u521d\u671f\u306b\u306f\u4fbf\u5229\u3067\u3059\u304c\u3001\u672c\u756a\u74b0\u5883\u3067\u306f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u4e0a\u306e\u30ea\u30b9\u30af\u306b\u306a\u308a\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u300c\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306ePod\u304b\u3089\u3057\u304bDB\u306b\u30a2\u30af\u30bb\u30b9\u3055\u305b\u305f\u304f\u306a\u3044\u300d\u306a\u3069\u3001\u901a\u4fe1\u306e\u5236\u9650\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002 \u3053\u306e\u3088\u3046\u306a\u901a\u4fe1\u5236\u5fa1\u3092\u884c\u3046\u305f\u3081\u306b\u4f7f\u308f\u308c\u308b\u306e\u304c\u3001NetworkPolicy\uff08\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30dd\u30ea\u30b7\u30fc\uff09 \u3067\u3059\u3002 \u2705 NetworkPolicy\u3068\u306f\uff1f NetworkPolicy \u306f\u3001Kubernetes\u306b\u304a\u3051\u308bPod\u9593\u3084Pod\u21d4\u5916\u90e8\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u901a\u4fe1\u3092\u5236\u9650\u30fb\u8a31\u53ef\u3059\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002 \u5177\u4f53\u7684\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff1a \u7279\u5b9a\u306ePod\u304b\u3089\u306e\u901a\u4fe1\u306e\u307f\u3092\u8a31\u53ef\uff08\u30a4\u30f3\u30d0\u30a6\u30f3\u30c9\u5236\u5fa1\uff09 \u7279\u5b9a\u306e\u5b9b\u5148\u3078\u306e\u901a\u4fe1\u306e\u307f\u3092\u8a31\u53ef\uff08\u30a2\u30a6\u30c8\u30d0\u30a6\u30f3\u30c9\u5236\u5fa1\uff09 Namespace \u3084 Label \u306b\u57fa\u3065\u3044\u305f\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0 \ud83e\udde9 \u57fa\u672c\u7684\u306a\u69cb\u9020 NetworkPolicy\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306aYAML\u5f62\u5f0f\u3067\u5b9a\u7fa9\u3057\u307e\u3059\uff1a apiVersion: networking.k8s.io\/v1 kind: NetworkPolicy metadata: name: allow-from-frontend namespace: my-app spec: podSelector: matchLabels: role: backend ingress: - from: - podSelector: matchLabels: role: frontend \u3053\u306e\u4f8b\u3067\u306f\uff1a my-app \u540d\u524d\u7a7a\u9593\u306e role=backend \u306ePod\u306b\u5bfe\u3057\u3001 role=frontend \u306ePod\u304b\u3089\u306e\u901a\u4fe1 \u3060\u3051 \u3092\u8a31\u53ef\u3057\u307e\u3059\u3002 \u26a0\ufe0f \u30dd\u30a4\u30f3\u30c8\uff1aNetworkPolicy\u30921\u3064\u3067\u3082\u4f5c\u6210\u3059\u308b\u3068\u3001\u305d\u308c\u306b\u30de\u30c3\u30c1\u3057\u306a\u3044\u901a\u4fe1\u306f\u906e\u65ad\u3055\u308c\u307e\u3059\uff08\u30db\u30ef\u30a4\u30c8\u30ea\u30b9\u30c8\u65b9\u5f0f\uff09\u3002 \ud83d\udd0d \u8a2d\u5b9a\u5bfe\u8c61\u3068\u3067\u304d\u308b\u3053\u3068 \u9805\u76ee\u8aac\u660epodSelector\u5bfe\u8c61\u3068\u306a\u308bPod\u3092\u30e9\u30d9\u30eb\u3067\u6307\u5b9aingress\u5916\u90e8\u304b\u3089Pod\u3078\u306e\u901a\u4fe1\u3092\u5236\u5fa1egressPod\u304b\u3089\u5916\u90e8\u3078\u306e\u901a\u4fe1\u3092\u5236\u5fa1\uff08\u4efb\u610f\uff09from \/ to\u8a31\u53ef\u5bfe\u8c61\uff08Pod\u3084Namespace\u306a\u3069\uff09ports\u8a31\u53ef\u3059\u308b\u30dd\u30fc\u30c8\u756a\u53f7 \ud83d\udee0 \u4f8b\uff1aPostgreSQL\u3078\u306e\u30a2\u30af\u30bb\u30b9\u5236\u5fa1 \u4f8b\u3048\u3070\u3001DB Pod\u306b\u5bfe\u3057\u3001app=backend \u3068\u3044\u3046\u30e9\u30d9\u30eb\u3092\u6301\u3064Pod\u3060\u3051\u304c\u30dd\u30fc\u30c85432\u3067\u901a\u4fe1\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u307e\u3059\uff1a apiVersion: networking.k8s.io\/v1 kind: NetworkPolicy metadata: name: allow-backend-to-db namespace: prod spec: podSelector: matchLabels: app: db ingress: - from: - podSelector: matchLabels: app: backend ports: - protocol: TCP port: 5432 \ud83d\udea6 NetworkPolicy\u306e\u6ce8\u610f\u70b9 Kubernetes\u5358\u4f53\u3067\u306fNetworkPolicy\u3092\u89e3\u91c8\u3059\u308b\u3060\u3051\u3067\u3001\u5b9f\u969b\u306e\u901a\u4fe1\u5236\u5fa1\u306fCNI\u30d7\u30e9\u30b0\u30a4\u30f3\u5074\u304c\u5b9f\u884c\u3057\u307e\u3059\uff08\u4f8b: Calico, Cilium, Weave Net \u306a\u3069\uff09\u3002 kubectl get networkpolicy \u3067\u5b9a\u7fa9\u3055\u308c\u305f\u30dd\u30ea\u30b7\u30fc\u3092\u78ba\u8a8d\u3067\u304d\u307e\u3059\u304c\u3001\u52d5\u4f5c\u78ba\u8a8d\u306b\u306f\u5b9f\u969b\u306e\u901a\u4fe1\u30c6\u30b9\u30c8\u304c\u91cd\u8981\u3067\u3059\u3002 Namespace\u3092\u307e\u305f\u3044\u3060\u901a\u4fe1\u5236\u5fa1\u3082\u53ef\u80fd\u3067\u3059\u3002 \u2705 \u3088\u304f\u3042\u308b\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9 \u30e6\u30fc\u30b9\u30b1\u30fc\u30b9NetworkPolicy\u3067\u5b9f\u73fe\u3067\u304d\u308b\u3053\u3068DB\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u4e00\u90e8\u306ePod\u306b\u9650\u5b9aingress \u3067\u5236\u5fa1\u5916\u90e8\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u7981\u6b62egress \u3067\u5236\u5fa1Namespace\u3054\u3068\u306b\u9694\u96e2namespaceSelector \u3092\u6d3b\u7528 \ud83d\udccc \u52d5\u4f5c\u78ba\u8a8d\u306e\u30dd\u30a4\u30f3\u30c8 \u7c21\u6613\u7684\u306b busybox Pod \u306a\u3069\u3092\u7acb\u3061\u4e0a\u3052\u3001wget \u3084 nc \u30b3\u30de\u30f3\u30c9\u3067\u901a\u4fe1\u30c6\u30b9\u30c8\u3059\u308b\u3068\u7406\u89e3\u304c\u9032\u307f\u307e\u3059\u3002 kubectl exec \u3092\u4f7f\u3063\u3066\u5bfe\u8c61Pod\u306b\u5165\u3063\u3066\u78ba\u8a8d\u3067\u304d\u307e\u3059\uff1a kubectl exec -it busybox -- \/bin\/sh wget less thandb-servicegreater than:5432 \ud83d\udd1a \u307e\u3068\u3081 NetworkPolicy\u306f\u3001Kubernetes\u306b\u304a\u3051\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u8981\u3067\u3059\u3002 \u30c7\u30d5\u30a9\u30eb\u30c8\u306f\u5168\u958b\u653e \u2192 \u660e\u793a\u7684\u306a\u5236\u9650\u3092\u52a0\u3048\u308b\u3053\u3068\u3067\u5b89\u5168\u306b Pod\u306e\u30e9\u30d9\u30eb\u3084Namespace\u3092\u6d3b\u7528\u3057\u3066\u67d4\u8edf\u306a\u5236\u5fa1\u304c\u53ef\u80fd \u5b9f\u969b\u306b\u306fCNI\u30d7\u30e9\u30b0\u30a4\u30f3\u3068\u30bb\u30c3\u30c8\u3067\u4f7f\u3046\u70b9\u306b\u6ce8\u610f\", \"Japanese Female\");\n                }\n            };\n        <\/script>\n    <\/p>\n\n\n\n<p>Kubernetes\u30af\u30e9\u30b9\u30bf\u30fc\u3067\u306f\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f<strong>\u3059\u3079\u3066\u306ePod\u9593\u901a\u4fe1\u304c\u8a31\u53ef<\/strong>\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306f\u958b\u767a\u521d\u671f\u306b\u306f\u4fbf\u5229\u3067\u3059\u304c\u3001\u672c\u756a\u74b0\u5883\u3067\u306f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u4e0a\u306e\u30ea\u30b9\u30af\u306b\u306a\u308a\u307e\u3059\u3002<br>\u305f\u3068\u3048\u3070\u3001\u300c\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306ePod\u304b\u3089\u3057\u304bDB\u306b\u30a2\u30af\u30bb\u30b9\u3055\u305b\u305f\u304f\u306a\u3044\u300d\u306a\u3069\u3001<strong>\u901a\u4fe1\u306e\u5236\u9650\u304c\u5fc5\u8981<\/strong>\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306a\u901a\u4fe1\u5236\u5fa1\u3092\u884c\u3046\u305f\u3081\u306b\u4f7f\u308f\u308c\u308b\u306e\u304c\u3001<strong>NetworkPolicy\uff08\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30dd\u30ea\u30b7\u30fc\uff09<\/strong> \u3067\u3059\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u2705 NetworkPolicy\u3068\u306f\uff1f<\/h3>\n\n\n\n<p>NetworkPolicy \u306f\u3001Kubernetes\u306b\u304a\u3051\u308b<strong>Pod\u9593\u3084Pod\u21d4\u5916\u90e8\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u901a\u4fe1\u3092\u5236\u9650\u30fb\u8a31\u53ef\u3059\u308b\u4ed5\u7d44\u307f<\/strong>\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u5177\u4f53\u7684\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<ul>\n<li>\u7279\u5b9a\u306ePod\u304b\u3089\u306e\u901a\u4fe1\u306e\u307f\u3092\u8a31\u53ef\uff08\u30a4\u30f3\u30d0\u30a6\u30f3\u30c9\u5236\u5fa1\uff09<\/li>\n\n\n\n<li>\u7279\u5b9a\u306e\u5b9b\u5148\u3078\u306e\u901a\u4fe1\u306e\u307f\u3092\u8a31\u53ef\uff08\u30a2\u30a6\u30c8\u30d0\u30a6\u30f3\u30c9\u5236\u5fa1\uff09<\/li>\n\n\n\n<li>Namespace \u3084 Label \u306b\u57fa\u3065\u3044\u305f\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83e\udde9 \u57fa\u672c\u7684\u306a\u69cb\u9020<\/h3>\n\n\n\n<p>NetworkPolicy\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306aYAML\u5f62\u5f0f\u3067\u5b9a\u7fa9\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\" data-show-lang=\"0\"><code>apiVersion: networking.k8s.io\/v1\nkind: NetworkPolicy\nmetadata:\n  name: allow-from-frontend\n  namespace: my-app\nspec:\n  podSelector:\n    matchLabels:\n      role: backend\n  ingress:\n    - from:\n        - podSelector:\n            matchLabels:\n              role: frontend<\/code><\/pre><\/div>\n\n\n\n<p>\u3053\u306e\u4f8b\u3067\u306f\uff1a<\/p>\n\n\n\n<ul>\n<li><code>my-app<\/code> \u540d\u524d\u7a7a\u9593\u306e <code>role=backend<\/code> \u306ePod\u306b\u5bfe\u3057\u3001<\/li>\n\n\n\n<li><code>role=frontend<\/code> \u306ePod\u304b\u3089\u306e\u901a\u4fe1 <strong>\u3060\u3051<\/strong> \u3092\u8a31\u53ef\u3057\u307e\u3059\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u26a0\ufe0f \u30dd\u30a4\u30f3\u30c8\uff1a<br>NetworkPolicy\u3092<strong>1\u3064\u3067\u3082\u4f5c\u6210\u3059\u308b\u3068\u3001\u305d\u308c\u306b\u30de\u30c3\u30c1\u3057\u306a\u3044\u901a\u4fe1\u306f\u906e\u65ad<\/strong>\u3055\u308c\u307e\u3059\uff08\u30db\u30ef\u30a4\u30c8\u30ea\u30b9\u30c8\u65b9\u5f0f\uff09\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udd0d \u8a2d\u5b9a\u5bfe\u8c61\u3068\u3067\u304d\u308b\u3053\u3068<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u9805\u76ee<\/th><th>\u8aac\u660e<\/th><\/tr><\/thead><tbody><tr><td><code>podSelector<\/code><\/td><td>\u5bfe\u8c61\u3068\u306a\u308bPod\u3092\u30e9\u30d9\u30eb\u3067\u6307\u5b9a<\/td><\/tr><tr><td><code>ingress<\/code><\/td><td>\u5916\u90e8\u304b\u3089Pod\u3078\u306e\u901a\u4fe1\u3092\u5236\u5fa1<\/td><\/tr><tr><td><code>egress<\/code><\/td><td>Pod\u304b\u3089\u5916\u90e8\u3078\u306e\u901a\u4fe1\u3092\u5236\u5fa1\uff08\u4efb\u610f\uff09<\/td><\/tr><tr><td><code>from<\/code> \/ <code>to<\/code><\/td><td>\u8a31\u53ef\u5bfe\u8c61\uff08Pod\u3084Namespace\u306a\u3069\uff09<\/td><\/tr><tr><td><code>ports<\/code><\/td><td>\u8a31\u53ef\u3059\u308b\u30dd\u30fc\u30c8\u756a\u53f7<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udee0 \u4f8b\uff1aPostgreSQL\u3078\u306e\u30a2\u30af\u30bb\u30b9\u5236\u5fa1<\/h3>\n\n\n\n<p>\u4f8b\u3048\u3070\u3001DB Pod\u306b\u5bfe\u3057\u3001<code>app=backend<\/code> \u3068\u3044\u3046\u30e9\u30d9\u30eb\u3092\u6301\u3064Pod\u3060\u3051\u304c\u30dd\u30fc\u30c85432\u3067\u901a\u4fe1\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>apiVersion: networking.k8s.io\/v1\nkind: NetworkPolicy\nmetadata:\n  name: allow-backend-to-db\n  namespace: prod\nspec:\n  podSelector:\n    matchLabels:\n      app: db\n  ingress:\n    - from:\n        - podSelector:\n            matchLabels:\n              app: backend\n      ports:\n        - protocol: TCP\n          port: 5432<\/code><\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udea6 NetworkPolicy\u306e\u6ce8\u610f\u70b9<\/h3>\n\n\n\n<ul>\n<li>Kubernetes\u5358\u4f53\u3067\u306fNetworkPolicy\u3092\u89e3\u91c8\u3059\u308b\u3060\u3051\u3067\u3001<strong>\u5b9f\u969b\u306e\u901a\u4fe1\u5236\u5fa1\u306fCNI\u30d7\u30e9\u30b0\u30a4\u30f3\u5074\u304c\u5b9f\u884c<\/strong>\u3057\u307e\u3059\uff08\u4f8b: Calico, Cilium, Weave Net \u306a\u3069\uff09\u3002<\/li>\n\n\n\n<li><code>kubectl get networkpolicy<\/code> \u3067\u5b9a\u7fa9\u3055\u308c\u305f\u30dd\u30ea\u30b7\u30fc\u3092\u78ba\u8a8d\u3067\u304d\u307e\u3059\u304c\u3001<strong>\u52d5\u4f5c\u78ba\u8a8d\u306b\u306f\u5b9f\u969b\u306e\u901a\u4fe1\u30c6\u30b9\u30c8\u304c\u91cd\u8981<\/strong>\u3067\u3059\u3002<\/li>\n\n\n\n<li><strong>Namespace\u3092\u307e\u305f\u3044\u3060\u901a\u4fe1\u5236\u5fa1<\/strong>\u3082\u53ef\u80fd\u3067\u3059\u3002<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u2705 \u3088\u304f\u3042\u308b\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9<\/th><th>NetworkPolicy\u3067\u5b9f\u73fe\u3067\u304d\u308b\u3053\u3068<\/th><\/tr><\/thead><tbody><tr><td>DB\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u4e00\u90e8\u306ePod\u306b\u9650\u5b9a<\/td><td><code>ingress<\/code> \u3067\u5236\u5fa1<\/td><\/tr><tr><td>\u5916\u90e8\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u7981\u6b62<\/td><td><code>egress<\/code> \u3067\u5236\u5fa1<\/td><\/tr><tr><td>Namespace\u3054\u3068\u306b\u9694\u96e2<\/td><td><code>namespaceSelector<\/code> \u3092\u6d3b\u7528<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udccc \u52d5\u4f5c\u78ba\u8a8d\u306e\u30dd\u30a4\u30f3\u30c8<\/h3>\n\n\n\n<ul>\n<li>\u7c21\u6613\u7684\u306b <code>busybox<\/code> Pod \u306a\u3069\u3092\u7acb\u3061\u4e0a\u3052\u3001<code>wget<\/code> \u3084 <code>nc<\/code> \u30b3\u30de\u30f3\u30c9\u3067\u901a\u4fe1\u30c6\u30b9\u30c8\u3059\u308b\u3068\u7406\u89e3\u304c\u9032\u307f\u307e\u3059\u3002<\/li>\n\n\n\n<li><code>kubectl exec<\/code> \u3092\u4f7f\u3063\u3066\u5bfe\u8c61Pod\u306b\u5165\u3063\u3066\u78ba\u8a8d\u3067\u304d\u307e\u3059\uff1a<\/li>\n<\/ul>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-bash\" data-lang=\"Bash\"><code>kubectl exec -it busybox -- \/bin\/sh\nwget &lt;db-service&gt;:5432<\/code><\/pre><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udd1a \u307e\u3068\u3081<\/h2>\n\n\n\n<p>NetworkPolicy\u306f\u3001<strong>Kubernetes\u306b\u304a\u3051\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u8981<\/strong>\u3067\u3059\u3002<\/p>\n\n\n\n<ul>\n<li>\u30c7\u30d5\u30a9\u30eb\u30c8\u306f\u5168\u958b\u653e \u2192 \u660e\u793a\u7684\u306a\u5236\u9650\u3092\u52a0\u3048\u308b\u3053\u3068\u3067\u5b89\u5168\u306b<\/li>\n\n\n\n<li>Pod\u306e\u30e9\u30d9\u30eb\u3084Namespace\u3092\u6d3b\u7528\u3057\u3066\u67d4\u8edf\u306a\u5236\u5fa1\u304c\u53ef\u80fd<\/li>\n\n\n\n<li>\u5b9f\u969b\u306b\u306fCNI\u30d7\u30e9\u30b0\u30a4\u30f3\u3068\u30bb\u30c3\u30c8\u3067\u4f7f\u3046\u70b9\u306b\u6ce8\u610f<\/li>\n<\/ul>\n\n\n\n<p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[55],"tags":[56],"_links":{"self":[{"href":"https:\/\/itstudy365.com\/blog\/wp-json\/wp\/v2\/posts\/1483"}],"collection":[{"href":"https:\/\/itstudy365.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itstudy365.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/itstudy365.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/itstudy365.com\/blog\/wp-json\/wp\/v2\/comments?post=1483"}],"version-history":[{"count":1,"href":"https:\/\/itstudy365.com\/blog\/wp-json\/wp\/v2\/posts\/1483\/revisions"}],"predecessor-version":[{"id":1484,"href":"https:\/\/itstudy365.com\/blog\/wp-json\/wp\/v2\/posts\/1483\/revisions\/1484"}],"wp:attachment":[{"href":"https:\/\/itstudy365.com\/blog\/wp-json\/wp\/v2\/media?parent=1483"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itstudy365.com\/blog\/wp-json\/wp\/v2\/categories?post=1483"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itstudy365.com\/blog\/wp-json\/wp\/v2\/tags?post=1483"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}