{"id":47128,"date":"2023-03-11T21:56:21","date_gmt":"2023-06-08T13:08:37","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8graph%e5%87%bd%e6%95%b0%e6%9b%bf%e4%bb%a3open-policy-agent%e4%b8%ad%e7%9a%84%e9%80%92%e5%bd%92%e5%a4%84%e7%90%86\/"},"modified":"2024-04-29T18:28:28","modified_gmt":"2024-04-29T10:28:28","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8graph%e5%87%bd%e6%95%b0%e6%9b%bf%e4%bb%a3open-policy-agent%e4%b8%ad%e7%9a%84%e9%80%92%e5%bd%92%e5%a4%84%e7%90%86","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8graph%e5%87%bd%e6%95%b0%e6%9b%bf%e4%bb%a3open-policy-agent%e4%b8%ad%e7%9a%84%e9%80%92%e5%bd%92%e5%a4%84%e7%90%86\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528graph\u51fd\u6570\u66ff\u4ee3Open Policy Agent\u4e2d\u7684\u9012\u5f52\u5904\u7406"},"content":{"rendered":"<p>\u6211\u662f\u65e5\u7acb\u7f8e\u56fdIoT Edge\u5b9e\u9a8c\u5ba4\u7684\u5927\u5d0e\u3002\u672c\u7bc7\u6587\u7ae0\u662f\u65e5\u7acb\u96c6\u56e2OSS Advent Calendar 2021\u7684\u7b2c19\u5929\u3002<br \/>\n\u672c\u7bc7\u6587\u7ae0\u5c06\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528graph\u51fd\u6570\u53ca\u5176\u7528\u6cd5\u6765\u907f\u514dOpen Policy Agent\u65e0\u6cd5\u5b9e\u73b0\u9012\u5f52\u5904\u7406\u7684\u9650\u5236\uff0c\u5e76\u5b9e\u73b0\u7b49\u6548\u7684\u903b\u8f91\u3002<\/p>\n<h2>Open Policy Agent\u662f\u4ec0\u4e48\uff1f<\/h2>\n<p>\u5f00\u653e\u7b56\u7565\u4ee3\u7406\uff08\u4ee5\u4e0b\u7b80\u79f0OPA\uff09\u662f\u4e00\u4e2a\u901a\u7528\u7684\u7b56\u7565\u5f15\u64ce\u3002\u5b83\u88ab\u7528\u4e8e\u51b3\u5b9aKubernetes\u8d44\u6e90\u521b\u5efa\u7684\u6743\u9650\u5224\u5b9a\u548cWeb\u670d\u52a1\u7684\u6388\u6743\u5224\u5b9a\u3002<\/p>\n<p>Rego\u8bed\u8a00\u662f\u4e3aOPA\u5f00\u53d1\u7684\u4e00\u79cd\u7b56\u7565\u63cf\u8ff0\u8bed\u8a00\u3002 Rego\u8bed\u8a00\u7684\u7279\u70b9\u662f\u65e8\u5728\u4ee5\u58f0\u660e\u6027\u7684\u65b9\u5f0f\u8fdb\u884c\u63cf\u8ff0\u3002\u4e0e\u547d\u4ee4\u6027\u63cf\u8ff0\u5e94\u8be5\u5982\u4f55\u5904\u7406\u4e0d\u540c\uff0c\u5b83\u4e13\u6ce8\u4e8e\u58f0\u660e\u6027\u5730\u63cf\u8ff0\u5e94\u8be5\u5224\u65ad\u4ec0\u4e48\u3002\u56e0\u6b64\uff0c\u53ef\u4ee5\u8ba4\u4e3a\u5b83\u80fd\u591f\u7b80\u6d01\u5730\u5b9e\u73b0\u7b56\u7565\u3002<\/p>\n<blockquote><p>Rego\u662f\u4e00\u79cd\u58f0\u660e\u5f0f\u8bed\u8a00\uff0c\u56e0\u6b64\u7b56\u7565\u4f5c\u8005\u53ef\u4ee5\u4e13\u6ce8\u4e8e\u67e5\u8be2\u5e94\u8be5\u8fd4\u56de\u4ec0\u4e48\uff0c\u800c\u4e0d\u662f\u5982\u4f55\u6267\u884c\u67e5\u8be2\u3002\u76f8\u6bd4\u8d77\u547d\u4ee4\u5f0f\u8bed\u8a00\uff0c\u8fd9\u4e9b\u67e5\u8be2\u66f4\u7b80\u5355\u3001\u66f4\u7b80\u6d01\u3002<\/p><\/blockquote>\n<h2>\u5bf9\u4e8eOPA\u7684\u9012\u5f52\u5904\u7406\u7684\u9650\u5236\u4ee5\u53ca\u4ee4\u4eba\u56f0\u6270\u7684\u60c5\u51b5\u3002<\/h2>\n<p>Open Policy Agent\u548c\u5b83\u7684\u7b56\u7565\u63cf\u8ff0\u8bed\u8a00Rego\uff0c\u6709\u65f6\u4f1a\u9047\u5230\u4e00\u4e2a\u95ee\u9898\uff0c\u5c31\u662f\u65e0\u6cd5\u7f16\u5199\u9012\u5f52\u5904\u7406\u3002<\/p>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u4f8b\u5b50\u4f86\u8aaa\u660e\u5728\u54ea\u7a2e\u60c5\u6cc1\u4e0b\u53ef\u80fd\u6703\u9047\u5230\u56f0\u96e3\u3002<br \/>\n\u5047\u8a2d\u653f\u7b56\u5236\u5b9a\u8005\u5011\u5f7c\u6b64\u64c1\u6709\u76f8\u4e92\u4f9d\u8cf4\u7684\u591a\u500b\u670d\u52d9\uff0c\u4e26\u4e14\u5e0c\u671b\u627e\u5230\u6240\u6709\u8207\u670d\u52d9A\u76f8\u4f9d\u8cf4\u7684\u670d\u52d9\u3002\u5047\u5b9a\u4f9d\u8cf4\u95dc\u4fc2\u5728\u540d\u70baservice_dependency\u7684JSON\u6578\u64da\u4e2d\u88ab\u5b9a\u7fa9\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"p\">{<\/span>\r\n  <span class=\"nl\">\"web\"<\/span><span class=\"p\">:<\/span> <span class=\"p\">[<\/span>\r\n    <span class=\"s2\">\"database\"<\/span>\r\n  <span class=\"p\">],<\/span>\r\n  <span class=\"nl\">\"database\"<\/span><span class=\"p\">:<\/span> <span class=\"p\">[],<\/span>\r\n  <span class=\"nl\">\"kafka\"<\/span><span class=\"p\">:<\/span> <span class=\"p\">[]<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u8fd9\u91cc\uff0c\u5047\u8bbe\u6211\u4eec\u8981\u5c06\u670d\u52a1\u540d\u4e3a &#8220;web&#8221; \u8f93\u5165\uff0c\u5e76\u4e14\u5b9e\u73b0\u4e00\u4e2a\u4e1a\u52a1\u903b\u8f91\u89c4\u5219\uff0c\u5b83\u4f1a\u627e\u5230\u6240\u6709\u4f9d\u8d56\u7684\u670d\u52a1\uff08\u4f8b\u5982[&#8220;web&#8221;, &#8220;database&#8221;]\uff09\uff0c\u7136\u540e\u8f93\u51fa\u3002\u5728 OPA \u4e2d\uff0c\u901a\u5e38\u4f1a\u4f7f\u7528\u89c4\u5219\u6765\u5b9e\u73b0\u7c7b\u4f3c\u51fd\u6570\u7684\u5904\u7406\u65b9\u5f0f\uff08\u5982\u679c\u9700\u8981\u7684\u8bdd\uff0c\u4e5f\u53ef\u4ee5\u7f16\u5199\u51fd\u6570\uff09\u3002<\/p>\n<p>\u6211\u5011\u5c07\u5617\u8a66\u5be6\u65bd\u4ee5\u4e0b\u985e\u4f3c\u7684all_dependencies\u898f\u5247\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"ow\">package<\/span> <span class=\"n\">main<\/span>\r\n\r\n<span class=\"n\">service_dependency<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"s2\">\"web\"<\/span><span class=\"o\">:<\/span> <span class=\"p\">[<\/span>\r\n    <span class=\"s2\">\"database\"<\/span>\r\n  <span class=\"p\">],<\/span>\r\n  <span class=\"s2\">\"database\"<\/span><span class=\"o\">:<\/span> <span class=\"p\">[],<\/span>\r\n  <span class=\"s2\">\"kafka\"<\/span><span class=\"o\">:<\/span> <span class=\"p\">[]<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"n\">all_dependencies<\/span><span class=\"p\">[<\/span><span class=\"n\">serviceName<\/span><span class=\"p\">]<\/span> <span class=\"o\">=<\/span> <span class=\"n\">rtn<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"n\">service<\/span> <span class=\"o\">=<\/span> <span class=\"n\">service_dependency<\/span><span class=\"p\">[<\/span><span class=\"n\">serviceName<\/span><span class=\"p\">][<\/span><span class=\"n\">_<\/span><span class=\"p\">]<\/span>\r\n  <span class=\"n\">rtn<\/span> <span class=\"o\">:=<\/span> <span class=\"p\">{<\/span><span class=\"n\">serviceName<\/span><span class=\"p\">}<\/span> <span class=\"o\">+<\/span> <span class=\"n\">all_dependencies<\/span><span class=\"p\">[<\/span><span class=\"n\">service<\/span><span class=\"p\">]<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<\/code><\/pre>\n<p>\u5c06\u6b64\u6587\u4ef6\u4fdd\u5b58\u4e3a\u540d\u4e3amain.rego\u7684\u6587\u4ef6\uff0c\u5e76\u5728\u540c\u4e00\u6587\u4ef6\u5939\u4e2d\u4f7f\u7528opa\u547d\u4ee4\u5bf9\u6b64\u89c4\u5219\u8fdb\u884c\u8bc4\u4f30\u3002\u7ed3\u679c\u4f1a\u8f93\u51fa\u4e00\u4e2a\u540d\u4e3a&#8221;recursive&#8221;\u7684\u9519\u8bef\u4fe1\u606f\uff0c\u8fd9\u8868\u660e\u6b64\u89c4\u5219\u65e0\u6cd5\u5728opa\u4e2d\u8fdb\u884c\u8bc4\u4f30\u3002<\/p>\n<pre class=\"post-pre\"><code>opa <span class=\"nb\">eval<\/span> <span class=\"nt\">-d<\/span> <span class=\"nb\">.<\/span> <span class=\"s1\">'data.main.all_dependencies[\"web\"]'<\/span> <span class=\"nt\">--format<\/span> pretty\r\n\r\n1 error occurred: main.rego:11: rego_recursion_error: rule all_dependencies is recursive: all_dependencies -&gt; all_dependencies\r\n<\/code><\/pre>\n<p>\u539f\u56e0\u662f\u5728all_dependencies\u89c4\u5219\u4e2d\uff0c\u4f7f\u7528all_dependencies\u81ea\u8eab\uff0copa\u4e0d\u5141\u8bb8\u9012\u5f52\u5904\u7406\uff0c\u56e0\u6b64\u68c0\u6d4b\u5230\u8fd9\u6837\u7684\u5b9e\u73b0\u4f1a\u8f93\u51fa\u9519\u8bef\u3002<\/p>\n<pre class=\"post-pre\"><code>  <span class=\"n\">rtn<\/span> <span class=\"o\">:=<\/span> <span class=\"p\">{<\/span><span class=\"n\">serviceName<\/span><span class=\"p\">}<\/span> <span class=\"o\">+<\/span> <span class=\"n\">all_dependencies<\/span><span class=\"p\">[<\/span><span class=\"n\">service<\/span><span class=\"p\">]<\/span>\r\n<\/code><\/pre>\n<h2>\u7ed5\u8fc7\u9012\u5f52\u5904\u7406\u7684\u9650\u5236\u65b9\u6cd5<\/h2>\n<p>\u653f\u7b56\u5236\u5b9a\u8005\u7684\u76ee\u6807\u662f\u201c\u5e0c\u671b\u627e\u5230\u6240\u6709\u4f9d\u8d56\u7684\u670d\u52a1\u201d\u7684\u4e1a\u52a1\u903b\u8f91\u3002OPA\u4e0d\u652f\u6301\u9012\u5f52\u5904\u7406\u7684\u5b9e\u73b0\uff0c\u4f46\u63d0\u4f9b\u4e86\u53e6\u4e00\u79cd\u5b9e\u73b0\u76f8\u540c\u76ee\u6807\u7684\u65b9\u5f0f\uff0c\u90a3\u5c31\u662f\u201c\u56fe\u201d\u3002<\/p>\n<p>\u603b\u7ed3\u4e00\u4e0b\uff0c\u4e0d\u662f\u8ba9\u7528\u6237\u6765\u5b9e\u73b0\u50cffor\u5faa\u73af\u8fd9\u6837\u7684\u9012\u5f52\u5904\u7406\uff0c\u800c\u662f\u53ea\u5b9a\u4e49\u60f3\u8981\u7528\u9012\u5f52\u5904\u7406\u641c\u7d22\u7684\u56fe\u4fe1\u606f\u3002\u5269\u4e0b\u7684\u641c\u7d22\u8fc7\u7a0b\u7531OPA\u7684\u56fe\u9690\u53bb\u3002<\/p>\n<p>\u6211\u8981\u5bf9main.rego\u7684\u5b9e\u73b0\u8fdb\u884c\u4ee5\u4e0b\u66f4\u6539\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"ow\">package<\/span> <span class=\"n\">main<\/span>\r\n\r\n<span class=\"n\">service_dependency<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"s2\">\"web\"<\/span><span class=\"o\">:<\/span> <span class=\"p\">[<\/span>\r\n    <span class=\"s2\">\"database\"<\/span>\r\n  <span class=\"p\">],<\/span>\r\n  <span class=\"s2\">\"database\"<\/span><span class=\"o\">:<\/span> <span class=\"p\">[],<\/span>\r\n  <span class=\"s2\">\"kafka\"<\/span><span class=\"o\">:<\/span> <span class=\"p\">[]<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"c1\"># all_dependencies[serviceName] = rtn {<\/span>\r\n<span class=\"c1\">#   service = service_dependency[serviceName][_]<\/span>\r\n<span class=\"c1\">#   rtn := {serviceName} + all_dependencies[service]<\/span>\r\n<span class=\"c1\"># }<\/span>\r\n\r\n<span class=\"n\">all_dependencies<\/span><span class=\"p\">[<\/span><span class=\"n\">serviceName<\/span><span class=\"p\">]<\/span> <span class=\"o\">=<\/span> <span class=\"n\">rtn<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"n\">service_dependency<\/span><span class=\"p\">[<\/span><span class=\"n\">serviceName<\/span><span class=\"p\">]<\/span>\r\n  <span class=\"n\">rtn<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">graph<\/span><span class=\"p\">.<\/span><span class=\"n\">reachable<\/span><span class=\"p\">(<\/span><span class=\"n\">service_dependency<\/span><span class=\"p\">,<\/span> <span class=\"p\">{<\/span><span class=\"n\">serviceName<\/span><span class=\"p\">})<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u4ee5\u4e0b\u662f\u5bf9 graphl.reachable() \u90e8\u5206\u7684\u672c\u5730\u5316\u6c49\u8bed\u7ffb\u8bd1\u7ed3\u679c\uff0c\u8fd9\u662fOPA\u63d0\u4f9b\u7684graph\u51fd\u6570\u3002\u73b0\u5728\u6211\u4eec\u7acb\u5373\u8fdb\u884c\u91cd\u65b0\u8bc4\u4f30\u3002<\/p>\n<pre class=\"post-pre\"><code>opa <span class=\"nb\">eval<\/span> <span class=\"nt\">-d<\/span> <span class=\"nb\">.<\/span> <span class=\"s1\">'data.main.all_dependencies[\"web\"]'<\/span> <span class=\"nt\">--format<\/span> pretty\r\n\r\n<span class=\"o\">[<\/span>\r\n  <span class=\"s2\">\"web\"<\/span>,\r\n  <span class=\"s2\">\"database\"<\/span>\r\n<span class=\"o\">]<\/span>\r\n<\/code><\/pre>\n<p>\u53ef\u4ee5\u770b\u5230\uff0c\u6b63\u786e\u8f93\u5165\u670d\u52a1\u540d\u79f0&#8221;web&#8221;\u4f1a\u8f93\u51fa\u4f9d\u8d56\u4e8e\u8be5\u670d\u52a1\u7684\u6240\u6709\u670d\u52a1\u540d\u79f0\u7684\u5217\u8868\uff08[&#8220;web&#8221;\uff0c&#8221;database&#8221;]\uff09\u3002\u7531\u4e8e\u6ca1\u6709\u4f7f\u7528\u9012\u5f52\u5904\u7406\uff0c\u6240\u4ee5\u4e0d\u4f1a\u8f93\u51fa\u9519\u8bef\u4fe1\u606f\u3002<\/p>\n<h2>\u56de\u907f\u7b56\u5728\u67d0\u4e9b\u60c5\u5883\u4e0b\u662f\u6709\u6548\u7684\u4f7f\u7528\u6848\u4f8b\u3002<\/h2>\n<p>\u5728\u4ee5\u4e0b\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u4f7f\u7528graph\u51fd\u6570\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5165\u308c\u5b50\u306b\u306a\u3063\u3066\u3044\u308b\u968e\u5c64\u306e\u63a2\u7d22<\/ul>\n<\/li>\n<\/ul>\n<p>\u305f\u3068\u3048\u3070\u7d44\u7e54A\u306e\u4e2d\u306b\u7d44\u7e54B\u304c\u3042\u308a\u3001\u7d44\u7e54B\u306bC\u3055\u3093\u304c\u6240\u5c5e\u3059\u308b\u5834\u5408\u306b\u306f\u3001\u6240\u5c5e\u95a2\u4fc2\u306fC-&gt;B-&gt;A\u3068\u3044\u3046\u30ea\u30f3\u30af\u3092\u6301\u3064\u6709\u5411\u30b0\u30e9\u30d5\u3067\u8868\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002C\u3055\u3093\u304c\u6240\u5c5e\u3059\u308b\u7d44\u7e54\u3092\u6d17\u3044\u51fa\u3059\u5834\u5408\u3001\u30b0\u30e9\u30d5\u3092\u63a2\u7d22\u3057\u3001\u3059\u3079\u3066\u306e\u7d44\u7e54 B\u3068A\u3092\u898b\u3064\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u30ef\u30fc\u30af\u30d5\u30ed\u30fc\u306e\u3088\u3046\u306a\u76f8\u4e92\u4f9d\u5b58\u95a2\u4fc2\u304c\u3042\u308b\u30b8\u30e7\u30d6\u306e\u63a2\u7d22<\/p>\n<p>\u305f\u3068\u3048\u3070A\u304c\u7d42\u4e86\u3057\u3066\u3044\u306a\u3044\u3068B\u304c\u958b\u59cb\u3067\u304d\u306a\u3044\u3001C\u306fB\u306e\u5f8c\u3001\u3068\u3044\u3046\u3088\u3046\u306a\u5834\u5408\u306b\u3001C-&gt;B-&gt;A\u3068\u3044\u3046\u30ea\u30f3\u30af\u3092\u5f35\u3063\u3066\u304a\u304f\u3068\u3001\u3053\u308c\u3082\u6709\u5411\u30b0\u30e9\u30d5\u306b\u306a\u308a\u307e\u3059\u3002C\u3092\u5b9f\u884c\u3059\u308b\u305f\u3081\u306e\u524d\u63d0\u6761\u4ef6\u3068\u306a\u308b\u30b8\u30e7\u30d6\u3092\u6d17\u3044\u51fa\u3059\u5834\u5408\u3001\u30b0\u30e9\u30d5\u3092\u63a2\u7d22\u3057\u3001C\u304b\u3089\u63a5\u7d9a\u3059\u308b\u3059\u3079\u3066\u306e\u30b8\u30e7\u30d6 B\u3068A\u3092\u898b\u3064\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2>\u56fe\u8868\u7684\u7528\u6cd5<\/h2>\n<p>\u56fe\u8868\u7684\u89c4\u683c\u5728\u4e0b\u9762\u7684\u6587\u6863\u4e2d\u6709\u8be6\u7ec6\u8bf4\u660e\u3002<\/p>\n<p>\u4ee5\u4e0b\u662f\u5177\u4f53\u7684\u6b65\u9aa4\u3002<\/p>\n<h3>\u7b2c\u4e00\u6b65. \u4f7f\u7528JSON\u63cf\u8ff0\u56fe\u5f62\u3002<\/h3>\n<p>OPA\u53ef\u4ee5\u8bfb\u53d6\u7684\u56fe\u5f62\u6570\u636e\u683c\u5f0f\u662f\u4ee5\u4e0b\u8fd9\u79cdJSON\u683c\u5f0f\u3002&#8221;Parent node *&#8221;\u548c&#8221;Child node *&#8221;\u90fd\u662f\u5b57\u7b26\u4e32\u5f62\u5f0f\u7684\u540d\u79f0\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"p\">{<\/span>\r\n  <span class=\"nl\">\"Parent node 1\"<\/span><span class=\"p\">:<\/span> <span class=\"p\">[<\/span> <span class=\"s2\">\"Child node 1\"<\/span><span class=\"p\">,<\/span> <span class=\"s2\">\"Child node 2\"<\/span> <span class=\"p\">],<\/span>\r\n  <span class=\"nl\">\"Parent node 2\"<\/span><span class=\"p\">:<\/span> <span class=\"p\">[<\/span> <span class=\"s2\">\"Child node 3\"<\/span><span class=\"p\">,<\/span> <span class=\"s2\">\"Child node 4\"<\/span> <span class=\"p\">]<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u4e0a\u8ff0\u7684\u6837\u672c\u8868\u793a\u94fe\u63a5\u8282\u70b9&#8221;Parent node 1&#8243;\u4e0e\u4e24\u4e2a\u94fe\u63a5\u76ee\u6807&#8221;Child node 1&#8243;\u548c&#8221;Child node 2&#8243;\u76f8\u8fde\u3002\u5373\u4f7f\u624b\u5934\u6ca1\u6709\u4e0a\u8ff0\u683c\u5f0f\u7684\u6570\u636e\uff0c\u4e5f\u53ef\u4ee5\u4ece\u5305\u542b\u6709\u5411\u56fe\u94fe\u63a5\u6e90\u548c\u94fe\u63a5\u76ee\u6807\u4fe1\u606f\u7684\u5176\u4ed6\u6570\u636e\u683c\u5f0f\u5728OPA\u4e0a\u521b\u5efa\u51fa\u6765\u3002<\/p>\n<p>\u6211\u4f1a\u4f7f\u7528OPA\u6765\u8bfb\u53d6\u4e0a\u8ff0JSON\u7684\u56fe\u8868\u63cf\u8ff0\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"n\">graph_data<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"s2\">\"Parent node 1\"<\/span><span class=\"o\">:<\/span> <span class=\"p\">[<\/span> <span class=\"s2\">\"Child node 1\"<\/span><span class=\"p\">,<\/span> <span class=\"s2\">\"Child node 2\"<\/span> <span class=\"p\">],<\/span>\r\n  <span class=\"s2\">\"Parent node 2\"<\/span><span class=\"o\">:<\/span> <span class=\"p\">[<\/span> <span class=\"s2\">\"Child node 3\"<\/span><span class=\"p\">,<\/span> <span class=\"s2\">\"Child node 4\"<\/span> <span class=\"p\">]<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h3>\u7b2c\u4e8c\u6b65\u3002\u641c\u7d22\u56fe\u8868\u3002<\/h3>\n<p>\u56fe\u53ef\u8fbe\u51fd\u6570\u7684\u53c2\u6570\u5982\u4e0b\u3002<\/p>\n<div>\n<div class=\"post-table\">\u5f15\u6570\u6982\u8981\u7b2c1\u5f15\u6570 (graph_data)\u624b\u98061. \u3067\u6e96\u5099\u3057\u305f\u30b0\u30e9\u30d5\u30c7\u30fc\u30bf\u7b2c2\u5f15\u6570 (start_points)\u30b0\u30e9\u30d5\u63a2\u7d22\u306e\u30b9\u30bf\u30fc\u30c8\u4f4d\u7f6e\u3068\u306a\u308b\u30ce\u30fc\u30c9\u540d\u306e\u30bb\u30c3\u30c8<\/div>\n<\/div>\n<p>\u7b2c\u4e8c\u4e2a\u53c2\u6570\u7684\u5b9a\u4e49\u5982\u4e0b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"n\">start_points<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span> <span class=\"s2\">\"Parent node 1\"<\/span><span class=\"p\">,<\/span> <span class=\"s2\">\"Parent node 2\"<\/span> <span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u8c03\u7528\u51fd\u6570\u65f6\uff0c\u53ef\u4ee5\u83b7\u5f97\u4e00\u4e2a\u5305\u542b\u6240\u6709\u53ef\u8bbf\u95ee\u8282\u70b9\u540d\u79f0\u7684\u96c6\u5408\u4f5c\u4e3a\u8fd4\u56de\u503c\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"n\">nodes<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">graph<\/span><span class=\"p\">.<\/span><span class=\"n\">reachable<\/span><span class=\"p\">(<\/span><span class=\"n\">graph_data<\/span><span class=\"p\">,<\/span> <span class=\"n\">start_points<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<p>\u6b64\u5916\uff0c\u8fd8\u6709\u5176\u4ed6\u4e00\u4e9b\u51fd\u6570\u53ef\u4f9b\u4f7f\u7528\uff0c\u5982graph.walk\u7b49\u3002\u7b80\u5355\u6765\u8bf4\uff0c\u53ef\u4ee5\u901a\u8fc7graph.walk(graph_data)\u8fd9\u6837\u7684\u65b9\u5f0f\u8c03\u7528\uff0c\u5b83\u4f1a\u8fd4\u56de\u4e00\u4e2a\u5c06\u8def\u5f84\uff08\u4f8b\u5982[&#8220;web&#8221;]\uff09\u7684\u4f4d\u7f6e\u4fe1\u606f\u6620\u5c04\u5230\u5176\u503c\uff08&#8221;database&#8221;\uff09\u7684\u5b57\u5178\uff08\u952e-\u503c\u7c7b\u578b\u5bf9\u8c61\uff09\u3002({&#8220;[\\&#8221;web\\&#8221;]&#8221;: &#8220;database&#8221;})<\/p>\n<h2>\u603b\u7ed3<\/h2>\n<p>\u8fd9\u6b21\u6211\u4eec\u4ecb\u7ecd\u4e86OPA\u7684graph\u51fd\u6570\u3002<br \/>\n\u901a\u8fc7\u4f7f\u7528OPA\u7684\u56fe\u6570\u636e\u641c\u7d22\u7528\u7684graph\u51fd\u6570\uff0c\u6211\u4eec\u53ef\u4ee5\u5b9e\u73b0\u4f7f\u7528\u9012\u5f52\u5904\u7406\u7684\u4e1a\u52a1\u903b\u8f91\u3002\u53ea\u9700\u8981\u4f7f\u7528JSON\u683c\u5f0f\u6765\u63cf\u8ff0\u7ec4\u7ec7\u3001\u5de5\u4f5c\u7b49\u4e92\u76f8\u4f9d\u8d56\u7684\u4e8b\u7269\uff0c\u5c31\u53ef\u4ee5\u5e94\u7528\u8fd9\u79cd\u65b9\u6cd5\u3002<br \/>\n\u6211\u8ba4\u4e3a\uff0c\u6211\u4eec\u8fd9\u6b21\u4ecb\u7ecd\u7684graph\u51fd\u6570\u662fOPA\u8bbe\u8ba1\u7406\u5ff5\u4e2d\u201c\u58f0\u660e\u6027\u80dc\u4e8e\u547d\u4ee4\u6027\u201d\u7684\u6700\u4f73\u529f\u80fd\u793a\u4f8b\uff0c\u5b83\u4e0d\u9700\u8981\u5199\u5faa\u73af\u7b49\u9012\u5f52\u5904\u7406\u7684\u63cf\u8ff0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6211\u662f\u65e5\u7acb\u7f8e\u56fdIoT Edge\u5b9e\u9a8c\u5ba4\u7684\u5927\u5d0e\u3002\u672c\u7bc7\u6587\u7ae0\u662f\u65e5\u7acb\u96c6\u56e2OSS Advent Calendar 2021\u7684 [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-47128","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u5982\u4f55\u4f7f\u7528graph\u51fd\u6570\u66ff\u4ee3Open Policy Agent\u4e2d\u7684\u9012\u5f52\u5904\u7406 - Blog - Silicon Cloud<\/title>\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.silicloud.com\/zh\/blog\/\u5982\u4f55\u4f7f\u7528graph\u51fd\u6570\u66ff\u4ee3open-policy-agent\u4e2d\u7684\u9012\u5f52\u5904\u7406\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u5982\u4f55\u4f7f\u7528graph\u51fd\u6570\u66ff\u4ee3Open Policy Agent\u4e2d\u7684\u9012\u5f52\u5904\u7406\" \/>\n<meta property=\"og:description\" content=\"\u6211\u662f\u65e5\u7acb\u7f8e\u56fdIoT Edge\u5b9e\u9a8c\u5ba4\u7684\u5927\u5d0e\u3002\u672c\u7bc7\u6587\u7ae0\u662f\u65e5\u7acb\u96c6\u56e2OSS Advent Calendar 2021\u7684 [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u5982\u4f55\u4f7f\u7528graph\u51fd\u6570\u66ff\u4ee3open-policy-agent\u4e2d\u7684\u9012\u5f52\u5904\u7406\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-06-08T13:08:37+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-29T10:28:28+00:00\" \/>\n<meta name=\"author\" content=\"\u96c5, \u609f\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta 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