{"id":781,"date":"2024-11-19T21:39:08","date_gmt":"2024-11-19T13:39:08","guid":{"rendered":"https:\/\/www.db2go.net\/?p=781"},"modified":"2024-11-19T21:39:08","modified_gmt":"2024-11-19T13:39:08","slug":"c-kubeedge%e4%b8%ad%e4%ba%91%e5%92%8c%e8%be%b9%e9%80%9a%e4%bf%a1%e7%9a%84%e6%a0%b8%e5%bf%83%e4%bb%a3%e7%a0%81","status":"publish","type":"post","link":"https:\/\/www.db2go.net\/?p=781","title":{"rendered":"C-kubeedge\u4e2d\u4e91\u548c\u8fb9\u901a\u4fe1\u7684\u6838\u5fc3\u4ee3\u7801"},"content":{"rendered":"<h2>kubeedge\u4e2d\u4e91\u548c\u8fb9\u901a\u4fe1\u7684\u6838\u5fc3\u4ee3\u7801<\/h2>\n<p>\u8fb9\u7f18\u7aef\u7ec4\u4ef6\uff08edgecore\uff09\u4e4b\u95f4\u5efa\u7acb\u7684\u53cc\u5411\u901a\u4fe1\u901a\u9053\u6765\u5b9e\u73b0\u7684\u3002KubeEdge \u4f7f\u7528 WebSocket \u548c MQTT \u534f\u8bae\u6765\u652f\u6301\u4e91\u8fb9\u4e4b\u95f4\u7684\u6570\u636e\u4f20\u8f93\u548c\u547d\u4ee4\u63a7\u5236\uff0c\u4e3b\u8981\u6a21\u5757\u5305\u62ec\u8bbe\u5907\u7ba1\u7406\u3001\u5e94\u7528\u7ba1\u7406\u548c\u8d44\u6e90\u540c\u6b65\u7b49\u3002\u4ee5\u4e0b\u662f\u4e91\u8fb9\u901a\u4fe1\u6838\u5fc3\u4ee3\u7801\u7684\u51e0\u4e2a\u5173\u952e\u70b9\u3002<\/p>\n<h3><strong>1. WebSocket \u901a\u4fe1\u5b9e\u73b0\u7684\u5e95\u5c42\u673a\u5236<\/strong><\/h3>\n<h4>1.1 <strong>\u4e91\u7aef\u76d1\u542c\u673a\u5236<\/strong><\/h4>\n<p>\u5728\u4e91\u7aef <code>cloudcore<\/code> \u7684 WebSocket \u670d\u52a1\u4e2d\uff0c\u76d1\u542c\u903b\u8f91\u5b9e\u73b0\u4e3b\u8981\u96c6\u4e2d\u5728\u4ee5\u4e0b\u6a21\u5757\uff1a<\/p>\n<ul>\n<li><code>pkg\/cloudhub\/servers\/httpserver\/server.go<\/code>\n<ul>\n<li>\u6838\u5fc3\u529f\u80fd\uff1a\u542f\u52a8 HTTP\/HTTPS \u76d1\u542c\u670d\u52a1\uff0c\u540c\u65f6\u5904\u7406 WebSocket \u7684\u63e1\u624b\u8bf7\u6c42\u3002<\/p>\n<\/li>\n<li>\n<p>\u5173\u952e\u4ee3\u7801\u5206\u6790\uff1a<\/p>\n<\/li>\n<\/ul>\n<pre><code class=\"language-go line-numbers\">upgrader := websocket.Upgrader{\n    CheckOrigin: func(r *http.Request) bool {\n        return true\n    },\n}\nconn, err := upgrader.Upgrade(w, r, nil)\n<\/code><\/pre>\n<p>\u8fd9\u91cc\u7684 <code>websocket.Upgrader<\/code> \u5b9e\u73b0\u4e86\u4ece HTTP\/HTTPS \u8bf7\u6c42\u5230 WebSocket \u8fde\u63a5\u7684\u5347\u7ea7\uff0c\u5b89\u5168\u7b56\u7565\uff08\u5982 CORS\uff09\u53ef\u4ee5\u901a\u8fc7 <code>CheckOrigin<\/code> \u81ea\u5b9a\u4e49\u3002<\/p>\n<\/li>\n<\/ul>\n<h4>1.2 <strong>\u8fb9\u7aef\u8fde\u63a5\u7684\u6301\u4e45\u5316<\/strong><\/h4>\n<p>\u8fb9\u7aef <code>edgecore<\/code> \u5728\u5efa\u7acb\u8fde\u63a5\u540e\uff0c\u4f1a\u542f\u52a8\u957f\u8fde\u63a5\u4fdd\u6301\u673a\u5236\u3002\u6838\u5fc3\u4ee3\u7801\u4f4d\u4e8e <code>pkg\/edgehub\/clients\/wsclient<\/code> \u4e2d\uff1a<\/p>\n<ul>\n<li>\u81ea\u52a8\u91cd\u8fde\u673a\u5236\uff1a\n<p>\u5f53\u7f51\u7edc\u65ad\u5f00\u65f6\uff0cWebSocket \u5ba2\u6237\u7aef\u4f1a\u81ea\u52a8\u5c1d\u8bd5\u91cd\u65b0\u8fde\u63a5\u4e91\u7aef\u3002\u5b9e\u73b0\u65b9\u5f0f\u5982\u4e0b\uff1a<\/p>\n<pre><code class=\"language-go line-numbers\">for {\n  conn, _, err := websocket.DefaultDialer.Dial(url, nil)\n  if err != nil {\n      time.Sleep(retryInterval)\n      continue\n  }\n  \/\/ \u6210\u529f\u8fde\u63a5\u540e\u8fdb\u5165\u6d88\u606f\u5904\u7406\u903b\u8f91\n}\n<\/code><\/pre>\n<p><code>retryInterval<\/code> \u63a7\u5236\u4e86\u91cd\u8fde\u7684\u65f6\u95f4\u95f4\u9694\uff0c\u7f51\u7edc\u65ad\u8fde\u65f6\u4e0d\u4f1a\u5f71\u54cd\u6574\u4f53\u4e1a\u52a1\u3002<\/p>\n<\/li>\n<\/ul>\n<hr \/>\n<h3><strong>2. \u6d88\u606f\u8def\u7531\u4e0e\u89e3\u6790\u7684\u6df1\u5165\u5b9e\u73b0<\/strong><\/h3>\n<p>KubeEdge \u7684\u6d88\u606f\u4f20\u9012\u4f9d\u8d56\u4e8e\u4e00\u4e2a\u5f3a\u5927\u7684\u8def\u7531\u4e0e\u89e3\u6790\u7cfb\u7edf\uff0c\u5176\u6838\u5fc3\u4ee3\u7801\u4e3b\u8981\u5206\u5e03\u5728\u4ee5\u4e0b\u6a21\u5757\u4e2d\uff1a<\/p>\n<h4>2.1 <strong>\u8def\u7531\u8868\u8bbe\u8ba1\u4e0e\u5b9e\u73b0<\/strong><\/h4>\n<p>KubeEdge \u7684\u6d88\u606f\u8def\u7531\u4f9d\u8d56\u4e8e\u4e00\u4e2a\u7075\u6d3b\u7684\u8def\u7531\u8868\uff08Routing Table\uff09\u673a\u5236\u3002\u6838\u5fc3\u4ee3\u7801\u4f4d\u4e8e <code>pkg\/common\/message<\/code>\uff1a<\/p>\n<ul>\n<li>\u8def\u7531\u4fe1\u606f\u7684\u5b9a\u4e49\uff1a\n<pre><code class=\"language-go line-numbers\">type Router struct {\n  Source  string\n  Group   string\n  Target  string\n  Resource string\n}\n<\/code><\/pre>\n<p><code>Source<\/code> \u548c <code>Target<\/code> \u7528\u4e8e\u6807\u8bc6\u6d88\u606f\u6765\u6e90\u4e0e\u76ee\u7684\uff0c<code>Resource<\/code> \u8868\u793a\u5177\u4f53\u7684\u8d44\u6e90\u8def\u5f84\uff08\u5982\u8bbe\u5907\u3001\u5e94\u7528\uff09\uff0c<code>Group<\/code> \u5219\u652f\u6301\u5206\u7ec4\u5e7f\u64ad\u901a\u4fe1\u3002<\/p>\n<\/li>\n<\/ul>\n<h4>2.2 <strong>\u4e0a\u4e0b\u884c\u6a21\u5757\u7684\u5904\u7406\u903b\u8f91<\/strong><\/h4>\n<ul>\n<li>\n<p>\u4e0b\u884c\u6d88\u606f\u5904\u7406\uff08Cloud \u2192 Edge\uff09\uff1a<\/p>\n<p>\u6a21\u5757\uff1a<code>pkg\/edgehub\/process\/downstream.go<\/code><\/p>\n<p>\u903b\u8f91\uff1a\u5728\u4e91\u7aef\u63a5\u6536\u5230\u63a7\u5236\u547d\u4ee4\u540e\uff0c\u5229\u7528\u8def\u7531\u4fe1\u606f\u5c06\u6d88\u606f\u4e0b\u53d1\u81f3\u8fb9\u7f18\u8bbe\u5907\u3002\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<pre><code class=\"language-go line-numbers\">func handleDownstream(msg common.Message) {\n  resource := msg.Router.Resource\n  switch resource {\n  case \"device\":\n      handleDeviceCommand(msg)\n  case \"config\":\n      updateConfiguration(msg)\n  }\n}\n<\/code><\/pre>\n<\/li>\n<li>\u4e0a\u884c\u6d88\u606f\u5904\u7406\uff08Edge \u2192 Cloud\uff09\uff1a\n<p>\u6a21\u5757\uff1a<code>pkg\/edgehub\/process\/upstream.go<\/code><\/p>\n<p>\u903b\u8f91\uff1a\u5728\u8fb9\u7aef\uff0c\u8bbe\u5907\u6216\u5e94\u7528\u72b6\u6001\u53d8\u5316\u65f6\uff0c\u81ea\u52a8\u89e6\u53d1\u4e0a\u884c\u6d88\u606f\u540c\u6b65\u5230\u4e91\u7aef\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code class=\"language-go line-numbers\">func handleUpstream(event common.Event) {\n  msg := createMessage(event)\n  sendToCloud(msg)\n}\n<\/code><\/pre>\n<\/li>\n<\/ul>\n<hr \/>\n<h3><strong>3. \u6570\u636e\u5e8f\u5217\u5316\u4e0e\u9ad8\u6548\u4f20\u8f93<\/strong><\/h3>\n<p>\u4e3a\u4e86\u63d0\u9ad8\u4f20\u8f93\u6548\u7387\uff0cKubeEdge \u7684 JSON \u6d88\u606f\u683c\u5f0f\u7ecf\u8fc7\u4f18\u5316\uff0c\u652f\u6301\u8f7b\u91cf\u5316\u7684\u5e8f\u5217\u5316\/\u53cd\u5e8f\u5217\u5316\u3002<\/p>\n<ul>\n<li>\u6a21\u5757\uff1a<code>pkg\/common\/message\/serialization.go<\/code><\/li>\n<li>\u5173\u952e\u70b9\uff1a\n<ul>\n<li><strong>\u538b\u7f29\u7b56\u7565\uff1a<\/strong> \u652f\u6301\u5bf9\u5927\u6570\u636e\u6d88\u606f\uff08\u5982\u65e5\u5fd7\u3001\u8bbe\u5907\u9065\u6d4b\u6570\u636e\uff09\u8fdb\u884c GZIP \u538b\u7f29\u3002<\/li>\n<li><strong>\u7ed3\u6784\u8bbe\u8ba1\uff1a<\/strong> \u6d88\u606f\u4e2d\u7684 <code>Content<\/code> \u652f\u6301\u81ea\u5b9a\u4e49\u6570\u636e\u7c7b\u578b\uff0c\u6269\u5c55\u6027\u5f3a\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<hr \/>\n<h3><strong>4. MQTT \u534f\u8bae\u5728\u8bbe\u5907\u7ba1\u7406\u4e2d\u7684\u6df1\u5165\u5206\u6790<\/strong><\/h3>\n<p>MQTT \u901a\u4fe1\u673a\u5236\u4e3b\u8981\u5728\u8bbe\u5907\u63a7\u5236\u548c\u6570\u636e\u91c7\u96c6\u4e2d\u4f7f\u7528\uff0c\u4e91\u7aef\u4e0e\u8bbe\u5907\u7aef\u7684\u4ea4\u4e92\u903b\u8f91\u5982\u4e0b\uff1a<\/p>\n<h4>4.1 <strong>\u4e91\u7aef\u5230\u8bbe\u5907\u7684\u6570\u636e\u53d1\u5e03<\/strong><\/h4>\n<p>\u6a21\u5757\uff1a<code>pkg\/devicecontroller\/controller\/devicecontroller.go<\/code><\/p>\n<ul>\n<li>\u5b9e\u73b0\u4e86\u57fa\u4e8e\u4e3b\u9898\u7684\u53d1\u5e03\u673a\u5236\u3002\u4f8b\u5982\uff0c\u4e0b\u53d1\u547d\u4ee4\u81f3\u8bbe\u5907\u65f6\uff0cMQTT \u6d88\u606f\u7684\u4e3b\u9898\u683c\u5f0f\u901a\u5e38\u4e3a\uff1a\n<pre><code class=\"language-bash line-numbers\">$ke\/device\/{device_id}\/command\n<\/code><\/pre>\n<p>\u5176\u4e2d\uff0c<code>{device_id}<\/code> \u8868\u793a\u76ee\u6807\u8bbe\u5907\u7684\u552f\u4e00\u6807\u8bc6\u3002<\/p>\n<\/li>\n<\/ul>\n<h4>4.2 <strong>\u8bbe\u5907\u5230\u4e91\u7aef\u7684\u6570\u636e\u4e0a\u4f20<\/strong><\/h4>\n<p>\u6a21\u5757\uff1a<code>pkg\/devicecontroller\/dtclient\/mqtt.go<\/code><\/p>\n<ul>\n<li>\u5b9a\u4e49\u4e86 MQTT \u6d88\u606f\u7684\u8ba2\u9605\u903b\u8f91\u3002\u4f8b\u5982\uff0c\u8ba2\u9605\u8bbe\u5907\u4e0a\u4f20\u7684\u6570\u636e\u4e3b\u9898\uff1a\n<pre><code class=\"language-bash line-numbers\">$ke\/device\/{device_id}\/data\n<\/code><\/pre>\n<p>\u6bcf\u5f53\u6709\u65b0\u7684\u6570\u636e\u4e0a\u4f20\u65f6\uff0c\u901a\u8fc7\u56de\u8c03\u51fd\u6570\u89e6\u53d1\u6d88\u606f\u5904\u7406\u903b\u8f91\uff1a<\/p>\n<pre><code class=\"language-go line-numbers\">mqttClient.Subscribe(topic, qos, func(client MQTT.Client, msg MQTT.Message) {\n  processIncomingData(msg)\n})\n<\/code><\/pre>\n<\/li>\n<\/ul>\n<hr \/>\n<h3><strong>5. TLS \u52a0\u5bc6\u673a\u5236\u7684\u589e\u5f3a\u8bbe\u8ba1<\/strong><\/h3>\n<h4>5.1 <strong>\u8bc1\u4e66\u7ba1\u7406<\/strong><\/h4>\n<p>KubeEdge \u652f\u6301\u53cc\u5411\u8ba4\u8bc1\u7684 TLS \u52a0\u5bc6\uff0c\u786e\u4fdd\u4e91\u8fb9\u901a\u4fe1\u7684\u5b89\u5168\u6027\u3002\u5173\u952e\u914d\u7f6e\u4f4d\u4e8e <code>pkg\/edgehub\/config\/config.go<\/code>\uff1a<\/p>\n<ul>\n<li><code>certFile<\/code>\uff1a\u5ba2\u6237\u7aef\u8bc1\u4e66\u8def\u5f84\u3002<\/li>\n<li><code>keyFile<\/code>\uff1a\u5ba2\u6237\u7aef\u79c1\u94a5\u8def\u5f84\u3002<\/li>\n<li><code>caFile<\/code>\uff1aCA \u8bc1\u4e66\u8def\u5f84\uff0c\u7528\u4e8e\u9a8c\u8bc1\u4e91\u7aef\u8bc1\u4e66\u3002<\/li>\n<\/ul>\n<h4>5.2 <strong>\u8fde\u63a5\u5b89\u5168\u6821\u9a8c<\/strong><\/h4>\n<p>WebSocket \u548c MQTT \u5747\u91c7\u7528 TLS \u901a\u9053\uff1a<\/p>\n<ul>\n<li>WebSocket\uff1a\u5728\u8fde\u63a5\u521d\u59cb\u5316\u65f6\u52a0\u5165 TLS \u914d\u7f6e\u3002\n<pre><code class=\"language-go line-numbers\">tlsConfig := &amp;tls.Config{\n  InsecureSkipVerify: false,\n  Certificates:       []tls.Certificate{cert},\n}\n<\/code><\/pre>\n<\/li>\n<li>MQTT\uff1a\u901a\u8fc7\u914d\u7f6e\u6587\u4ef6\u6ce8\u5165 TLS \u53c2\u6570\u3002\n<pre><code class=\"language-go line-numbers\">opts := MQTT.NewClientOptions()\nopts.SetTLSConfig(tlsConfig)\n<\/code><\/pre>\n<\/li>\n<\/ul>\n<hr \/>\n<h3><strong>6. \u6027\u80fd\u4f18\u5316\u4e0e\u6269\u5c55<\/strong><\/h3>\n<h4>6.1 <strong>\u6279\u91cf\u6d88\u606f\u5904\u7406<\/strong><\/h4>\n<p>\u4e3a\u4e86\u63d0\u5347\u5927\u89c4\u6a21\u8bbe\u5907\u7ba1\u7406\u4e0b\u7684\u6548\u7387\uff0cKubeEdge \u652f\u6301\u6279\u91cf\u6d88\u606f\u53d1\u9001\u4e0e\u63a5\u6536\u3002\u4ee3\u7801\u5b9e\u73b0\uff1a<\/p>\n<pre><code class=\"language-go line-numbers\">batchMessages := groupMessagesByTarget(msgs)\nfor target, batch := range batchMessages {\n    sendBatchToTarget(target, batch)\n}\n<\/code><\/pre>\n<h4>6.2 <strong>\u8fb9\u7f18\u667a\u80fd\u589e\u5f3a<\/strong><\/h4>\n<p>\u901a\u8fc7\u96c6\u6210 AI \u6a21\u578b\uff08\u5982 TensorFlow Lite\uff09\uff0c\u53ef\u4ee5\u5728\u8fb9\u7f18\u7aef\u5b9e\u73b0\u672c\u5730\u63a8\u7406\uff0c\u51cf\u5c11\u4e91\u7aef\u8d1f\u8f7d\u3002\u4ee3\u7801\u4f4d\u7f6e\uff1a<code>pkg\/edged\/ai\/<\/code>\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>kubeedge\u4e2d\u4e91\u548c\u8fb9\u901a\u4fe1\u7684\u6838\u5fc3\u4ee3\u7801 \u8fb9\u7f18\u7aef\u7ec4\u4ef6\uff08edgecore\uff09\u4e4b\u95f4\u5efa\u7acb\u7684\u53cc\u5411\u901a\u4fe1\u901a\u9053\u6765\u5b9e\u73b0\u7684\u3002Kube&hellip;<\/p>\n <a href=\"https:\/\/www.db2go.net\/?p=781\" title=\"C-kubeedge\u4e2d\u4e91\u548c\u8fb9\u901a\u4fe1\u7684\u6838\u5fc3\u4ee3\u7801\" class=\"entry-more-link\"><span>Read More<\/span> <span class=\"screen-reader-text\">C-kubeedge\u4e2d\u4e91\u548c\u8fb9\u901a\u4fe1\u7684\u6838\u5fc3\u4ee3\u7801<\/span><\/a>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"Layout":"","footnotes":""},"categories":[20],"tags":[],"class_list":["entry","author-suredandan","post-781","post","type-post","status-publish","format-standard","category-20"],"views":1721,"_links":{"self":[{"href":"https:\/\/www.db2go.net\/index.php?rest_route=\/wp\/v2\/posts\/781","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.db2go.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.db2go.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.db2go.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.db2go.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=781"}],"version-history":[{"count":2,"href":"https:\/\/www.db2go.net\/index.php?rest_route=\/wp\/v2\/posts\/781\/revisions"}],"predecessor-version":[{"id":783,"href":"https:\/\/www.db2go.net\/index.php?rest_route=\/wp\/v2\/posts\/781\/revisions\/783"}],"wp:attachment":[{"href":"https:\/\/www.db2go.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=781"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.db2go.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=781"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.db2go.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=781"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}