{"id":736,"date":"2024-11-08T09:41:47","date_gmt":"2024-11-08T01:41:47","guid":{"rendered":"https:\/\/www.db2go.net\/?p=736"},"modified":"2024-11-08T09:41:47","modified_gmt":"2024-11-08T01:41:47","slug":"%e4%b8%80-%e4%ba%91%e8%be%b9%e5%8d%8f%e5%90%8c%e6%9e%b6%e6%9e%84%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=736","title":{"rendered":"\u4e00.\u4e91\u8fb9\u534f\u540c\u67b6\u6784\u7684\u6838\u5fc3\u4ee3\u7801"},"content":{"rendered":"<p>\u5728 KubeEdge \u4e2d\uff0c\u4e91\u8fb9\u534f\u540c\u67b6\u6784\u7684\u6838\u5fc3\u4ee3\u7801\u5206\u5e03\u5728 <code>cloudcore<\/code>\uff08\u4e91\u7aef\uff09\u548c <code>edgecore<\/code>\uff08\u8fb9\u7aef\uff09\u7ec4\u4ef6\u4e2d\u3002\u4e91\u8fb9\u4e4b\u95f4\u7684\u901a\u4fe1\u4e3b\u8981\u901a\u8fc7 WebSocket \u5efa\u7acb\u53cc\u5411\u8fde\u63a5\uff0c<code>cloudcore<\/code> \u4f5c\u4e3a\u670d\u52a1\u7aef\u76d1\u542c\u8fde\u63a5\uff0c<code>edgecore<\/code> \u4f5c\u4e3a\u5ba2\u6237\u7aef\u53d1\u8d77\u8fde\u63a5\u3002\u4ee5\u4e0b\u662f\u5bf9\u4e91\u8fb9\u534f\u540c\u67b6\u6784\u6838\u5fc3\u4ee3\u7801\u7684\u8be6\u7ec6\u5206\u6790\uff1a<\/p>\n<h3>1. <code>cloudcore<\/code> \u7684\u6838\u5fc3\u4ee3\u7801\u5206\u6790<\/h3>\n<p>\u5728 <code>cloudcore<\/code> \u4e2d\uff0c\u4e91\u7aef\u4e3b\u8981\u901a\u8fc7 <code>cloudhub<\/code> \u6a21\u5757\u6765\u7ba1\u7406\u4e0e\u8fb9\u7aef\u7684\u8fde\u63a5\u548c\u901a\u4fe1\u3002<code>cloudhub<\/code> \u4e2d\u5305\u542b\u4e86\u8fde\u63a5\u7684\u5efa\u7acb\u3001\u6d88\u606f\u8def\u7531\u3001\u6570\u636e\u4e0b\u53d1\u7b49\u6838\u5fc3\u903b\u8f91\u3002<\/p>\n<h4>WebSocket \u670d\u52a1\u7aef\u521d\u59cb\u5316<\/h4>\n<p>\u4e91\u7aef\u7684 WebSocket \u670d\u52a1\u7aef\u5728 <code>cloudhub<\/code> \u4e2d\u8fdb\u884c\u521d\u59cb\u5316\uff0c\u5177\u4f53\u5728 <code>cloud\/pkg\/cloudhub\/servers\/server.go<\/code> \u6587\u4ef6\u4e2d\uff1a<\/p>\n<ul>\n<li><strong>WebSocket \u670d\u52a1\u542f\u52a8<\/strong>\uff1a\u5728 <code>NewWsServer<\/code> \u51fd\u6570\u4e2d\uff0c\u5b9a\u4e49\u4e86 WebSocket \u670d\u52a1\u7684\u5730\u5740\u548c\u7aef\u53e3\uff0c\u76d1\u542c\u6765\u81ea\u8fb9\u7f18\u8282\u70b9\u7684\u8fde\u63a5\u8bf7\u6c42\u3002\n<pre><code class=\"language-go line-numbers\">func NewWsServer(config *v1alpha1.EdgeControllerConfig) *WsServer {\n  return &amp;WsServer{\n      Config:  config,\n      Address: config.ControllerContext.Address,\n  }\n}\n<\/code><\/pre>\n<\/li>\n<li><strong>\u8fde\u63a5\u7ba1\u7406<\/strong>\uff1a\u901a\u8fc7 <code>HandleWSConnection<\/code> \u51fd\u6570\u63a5\u6536\u6765\u81ea\u8fb9\u7f18\u7aef\u7684 WebSocket \u8fde\u63a5\u8bf7\u6c42\uff0c\u521b\u5efa\u65b0\u7684\u8fde\u63a5\u5e76\u5c06\u5176\u6dfb\u52a0\u5230\u8fde\u63a5\u6c60\u4e2d\uff0c\u4ee5\u4fbf\u8fdb\u884c\u6d88\u606f\u7684\u63a5\u6536\u548c\u53d1\u9001\u3002\n<pre><code class=\"language-go line-numbers\">func (s *WsServer) HandleWSConnection(conn *websocket.Conn) {\n  go func() {\n      \/\/ \u5904\u7406\u6765\u81ea\u8fb9\u7aef\u7684\u6d88\u606f\n      s.ReceiveMessage(conn)\n  }()\n  go func() {\n      \/\/ \u53d1\u9001\u6d88\u606f\u5230\u8fb9\u7aef\n      s.SendMessage(conn)\n  }()\n}\n<\/code><\/pre>\n<\/li>\n<\/ul>\n<h4>\u6d88\u606f\u8def\u7531<\/h4>\n<p>\u5728 <code>cloudhub<\/code> \u4e2d\uff0c\u6d88\u606f\u8def\u7531\u6a21\u5757\u8d1f\u8d23\u5c06\u6765\u81ea\u4e91\u7aef\u7684\u6d88\u606f\u8def\u7531\u5230\u5bf9\u5e94\u7684\u8fb9\u7f18\u8282\u70b9\uff0c\u540c\u65f6\u5c06\u8fb9\u7aef\u7684\u6570\u636e\u8f6c\u53d1\u5230\u4e91\u7aef\u7684\u5176\u4ed6\u6a21\u5757\u3002\u6d88\u606f\u8def\u7531\u7684\u4e3b\u8981\u5b9e\u73b0\u6587\u4ef6\u662f <code>cloud\/pkg\/cloudhub\/handler\/messagehandler.go<\/code>\u3002<\/p>\n<ul>\n<li><strong>\u6d88\u606f\u5904\u7406\u5668<\/strong>\uff1a\u5728 <code>ProcessMessage<\/code> \u51fd\u6570\u4e2d\uff0c\u63a5\u6536\u548c\u89e3\u6790\u6765\u81ea\u8fb9\u7aef\u7684\u6d88\u606f\uff0c\u6839\u636e\u6d88\u606f\u7684\u76ee\u6807\u548c\u7c7b\u578b\u51b3\u5b9a\u8def\u7531\u7b56\u7565\u3002\n<pre><code class=\"language-go line-numbers\">func (mh *MessageHandler) ProcessMessage(msg model.Message) {\n  target := msg.GetTarget()\n  switch target {\n  case \"edge\":\n      \/\/ \u8f6c\u53d1\u5230\u8fb9\u7aef\u7684\u5904\u7406\u903b\u8f91\n  case \"cloud\":\n      \/\/ \u4e91\u7aef\u5904\u7406\u903b\u8f91\n  default:\n      log.Warningf(\"Unknown target: %s\", target)\n  }\n}\n<\/code><\/pre>\n<\/li>\n<\/ul>\n<h3>2. <code>edgecore<\/code> \u7684\u6838\u5fc3\u4ee3\u7801\u5206\u6790<\/h3>\n<p>\u5728 <code>edgecore<\/code> \u4e2d\uff0c\u8fb9\u7aef\u4e3b\u8981\u901a\u8fc7 <code>edgehub<\/code> \u6a21\u5757\u4e0e\u4e91\u7aef\u5efa\u7acb\u8fde\u63a5\u5e76\u4fdd\u6301\u901a\u4fe1\u3002<code>edgehub<\/code> \u6a21\u5757\u8d1f\u8d23\u7ba1\u7406\u8fde\u63a5\u3001\u6d88\u606f\u5904\u7406\u548c\u65ad\u7ebf\u91cd\u8fde\u7b49\u529f\u80fd\u3002<\/p>\n<h4>WebSocket \u5ba2\u6237\u7aef\u521d\u59cb\u5316<\/h4>\n<p>\u8fb9\u7aef\u7684 WebSocket \u5ba2\u6237\u7aef\u521d\u59cb\u5316\u4ee3\u7801\u4f4d\u4e8e <code>edge\/pkg\/edgehub\/clients\/wsclient\/websocket.go<\/code> \u6587\u4ef6\u4e2d\uff1a<\/p>\n<ul>\n<li><strong>WebSocket \u5ba2\u6237\u7aef\u542f\u52a8<\/strong>\uff1a\u5728 <code>InitWebSocket<\/code> \u51fd\u6570\u4e2d\uff0c\u521d\u59cb\u5316 WebSocket \u5ba2\u6237\u7aef\u8fde\u63a5\u7684\u914d\u7f6e\uff0c\u5305\u62ec\u76ee\u6807\u5730\u5740\u3001\u7aef\u53e3\u3001TLS \u8bbe\u7f6e\u7b49\u3002\n<pre><code class=\"language-go line-numbers\">func (wc *WebSocketClient) InitWebSocket() error {\n  \/\/ \u8bbe\u7f6e\u8fde\u63a5\u5730\u5740\u548c\u534f\u8bae\n  url := fmt.Sprintf(\"wss:\/\/%s:%d\", wc.Config.Server, wc.Config.Port)\n  conn, _, err := websocket.DefaultDialer.Dial(url, nil)\n  if err != nil {\n      return err\n  }\n  wc.Connection = conn\n  return nil\n}\n<\/code><\/pre>\n<\/li>\n<li><strong>\u8fde\u63a5\u5efa\u7acb\u548c\u91cd\u8fde<\/strong>\uff1a\u5728 <code>KeepConnection<\/code> \u51fd\u6570\u4e2d\uff0c\u8d1f\u8d23\u4e0d\u65ad\u5c1d\u8bd5\u4e0e <code>cloudcore<\/code> \u5efa\u7acb WebSocket \u8fde\u63a5\uff0c\u5e76\u5728\u8fde\u63a5\u65ad\u5f00\u65f6\u91cd\u65b0\u8fde\u63a5\u3002\n<pre><code class=\"language-go line-numbers\">func (wc *WebSocketClient) KeepConnection() {\n  for {\n      err := wc.InitWebSocket()\n      if err != nil {\n          \/\/ \u8fde\u63a5\u5931\u8d25\uff0c\u7b49\u5f85\u91cd\u8bd5\n          time.Sleep(retryInterval)\n          continue\n      }\n      \/\/ \u5f00\u59cb\u63a5\u6536\u548c\u53d1\u9001\u6d88\u606f\n      wc.HandleConnection()\n  }\n}\n<\/code><\/pre>\n<\/li>\n<\/ul>\n<h4>\u6d88\u606f\u5904\u7406<\/h4>\n<p>\u5728 <code>edgehub<\/code> \u4e2d\uff0c\u6d88\u606f\u5904\u7406\u903b\u8f91\u4f4d\u4e8e <code>edge\/pkg\/edgehub\/process.go<\/code> \u6587\u4ef6\u4e2d\u3002\u6d88\u606f\u5904\u7406\u6a21\u5757\u8d1f\u8d23\u5c06\u4e91\u7aef\u4e0b\u53d1\u7684\u6d88\u606f\u8f6c\u53d1\u5230\u8fb9\u7aef\u7684\u5176\u4ed6\u6a21\u5757\uff0c\u5e76\u4e0a\u62a5\u8fb9\u7aef\u7684\u72b6\u6001\u5230\u4e91\u7aef\u3002<\/p>\n<ul>\n<li><strong>\u6d88\u606f\u63a5\u6536\u4e0e\u53d1\u9001<\/strong>\uff1a\u5728 <code>HandleConnection<\/code> \u51fd\u6570\u4e2d\uff0c\u5f00\u542f\u4e24\u4e2a\u534f\u7a0b\uff0c\u5206\u522b\u7528\u4e8e\u63a5\u6536\u548c\u53d1\u9001\u6d88\u606f\u3002\n<pre><code class=\"language-go line-numbers\">func (wc *WebSocketClient) HandleConnection() {\n  go wc.ReceiveMessage()\n  go wc.SendMessage()\n}\n<\/code><\/pre>\n<\/li>\n<li><strong>\u6d88\u606f\u8def\u7531<\/strong>\uff1a<code>ProcessDownstream<\/code> \u51fd\u6570\u7528\u4e8e\u5c06\u63a5\u6536\u5230\u7684\u4e91\u7aef\u6d88\u606f\u5206\u53d1\u5230\u8fb9\u7f18\u8bbe\u5907\u6216\u5e94\u7528\u4e2d\u3002\u4f8b\u5982\uff0c\u5982\u679c\u63a5\u6536\u5230\u8d44\u6e90\u66f4\u65b0\u8bf7\u6c42\uff0c\u5c06\u8c03\u7528\u5bf9\u5e94\u7684\u5904\u7406\u903b\u8f91\u3002\n<pre><code class=\"language-go line-numbers\">func (eh *EdgeHub) ProcessDownstream(msg model.Message) {\n  \/\/ \u6839\u636e\u6d88\u606f\u5185\u5bb9\uff0c\u9009\u62e9\u4e0d\u540c\u7684\u5904\u7406\u903b\u8f91\n  switch msg.GetResource() {\n  case \"device\":\n      eh.HandleDeviceMessage(msg)\n  case \"app\":\n      eh.HandleAppMessage(msg)\n  default:\n      log.Warning(\"Unsupported resource type\")\n  }\n}\n<\/code><\/pre>\n<\/li>\n<\/ul>\n<h3>3. \u4e91\u8fb9\u534f\u540c\u7684\u6570\u636e\u4f20\u8f93\u683c\u5f0f<\/h3>\n<p>\u5728 KubeEdge \u4e2d\uff0c\u6d88\u606f\u5728\u4e91\u7aef\u548c\u8fb9\u7aef\u4e4b\u95f4\u4f20\u8f93\u65f6\u4f7f\u7528\u7edf\u4e00\u7684\u6570\u636e\u683c\u5f0f <code>Message<\/code>\uff0c\u5176\u5b9a\u4e49\u4f4d\u4e8e <code>pkg\/common\/message\/message.go<\/code> \u6587\u4ef6\u4e2d\u3002<\/p>\n<pre><code class=\"language-go line-numbers\">type Message struct {\n    Header Header\n    Router Router\n    Content interface{}\n}\n<\/code><\/pre>\n<ul>\n<li><strong>Header<\/strong>\uff1a\u6d88\u606f\u7684\u5143\u6570\u636e\uff0c\u5982\u6d88\u606f ID \u548c\u7236\u6d88\u606f ID\u3002<\/li>\n<li><strong>Router<\/strong>\uff1a\u6d88\u606f\u7684\u8def\u7531\u4fe1\u606f\uff0c\u5305\u62ec\u6765\u6e90\u3001\u76ee\u6807\u3001\u8d44\u6e90\u8def\u5f84\u7b49\u3002<\/li>\n<li><strong>Content<\/strong>\uff1a\u5b9e\u9645\u7684\u6570\u636e\u5185\u5bb9\uff0c\u53ef\u4ee5\u662f JSON \u683c\u5f0f\u7684\u8bbe\u5907\u72b6\u6001\u3001\u5e94\u7528\u914d\u7f6e\u7b49\u3002<\/li>\n<\/ul>\n<h3>4. \u5b89\u5168\u6027\u4e0e TLS \u914d\u7f6e<\/h3>\n<p>KubeEdge \u652f\u6301\u4f7f\u7528 TLS \u8fdb\u884c\u52a0\u5bc6\u901a\u4fe1\uff0c\u4ee5\u4fdd\u8bc1\u6570\u636e\u7684\u5b89\u5168\u6027\u3002\u5728 <code>cloudcore<\/code> \u548c <code>edgecore<\/code> \u7684\u914d\u7f6e\u6587\u4ef6\u4e2d\uff0c\u5b9a\u4e49\u4e86 TLS \u7684\u76f8\u5173\u914d\u7f6e\uff08\u5982\u8bc1\u4e66\u548c\u5bc6\u94a5\u8def\u5f84\uff09\u3002\u5728 WebSocket \u521d\u59cb\u5316\u65f6\u4f1a\u68c0\u67e5\u8fd9\u4e9b\u914d\u7f6e\uff0c\u786e\u4fdd\u901a\u4fe1\u5b89\u5168\u3002<\/p>\n<h3>\u603b\u7ed3<\/h3>\n<p>KubeEdge \u7684\u4e91\u8fb9\u534f\u540c\u67b6\u6784\u4e3b\u8981\u4f9d\u8d56 <code>cloudcore<\/code> \u548c <code>edgecore<\/code> \u4e4b\u95f4\u7684 WebSocket \u8fde\u63a5\u6765\u8fdb\u884c\u53cc\u5411\u901a\u4fe1\u3002\u4e91\u7aef\u7684 <code>cloudhub<\/code> \u6a21\u5757\u8d1f\u8d23 WebSocket \u670d\u52a1\u7aef\u7684\u7ba1\u7406\u3001\u6d88\u606f\u8def\u7531\u548c\u6570\u636e\u4e0b\u53d1\uff0c\u8fb9\u7aef\u7684 <code>edgehub<\/code> \u6a21\u5757\u5219\u8d1f\u8d23 WebSocket \u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u7ba1\u7406\u3001\u6d88\u606f\u5904\u7406\u548c\u65ad\u7ebf\u91cd\u8fde\u3002\u8fd9\u79cd\u8bbe\u8ba1\u5b9e\u73b0\u4e86\u4e91\u7aef\u548c\u8fb9\u7aef\u7684\u534f\u540c\u5de5\u4f5c\uff0c\u5373\u4f7f\u5728\u8fb9\u7f18\u73af\u5883\u4e0b\u4e5f\u80fd\u6709\u6548\u652f\u6301\u5e94\u7528\u548c\u8bbe\u5907\u7684\u7ba1\u7406\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 KubeEdge \u4e2d\uff0c\u4e91\u8fb9\u534f\u540c\u67b6\u6784\u7684\u6838\u5fc3\u4ee3\u7801\u5206\u5e03\u5728 cloudcore\uff08\u4e91\u7aef\uff09\u548c edgecore\uff08\u8fb9\u7aef\uff09&hellip;<\/p>\n <a href=\"https:\/\/www.db2go.net\/?p=736\" title=\"\u4e00.\u4e91\u8fb9\u534f\u540c\u67b6\u6784\u7684\u6838\u5fc3\u4ee3\u7801\" class=\"entry-more-link\"><span>Read More<\/span> <span class=\"screen-reader-text\">\u4e00.\u4e91\u8fb9\u534f\u540c\u67b6\u6784\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-736","post","type-post","status-publish","format-standard","category-20"],"views":955,"_links":{"self":[{"href":"https:\/\/www.db2go.net\/index.php?rest_route=\/wp\/v2\/posts\/736","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=736"}],"version-history":[{"count":1,"href":"https:\/\/www.db2go.net\/index.php?rest_route=\/wp\/v2\/posts\/736\/revisions"}],"predecessor-version":[{"id":738,"href":"https:\/\/www.db2go.net\/index.php?rest_route=\/wp\/v2\/posts\/736\/revisions\/738"}],"wp:attachment":[{"href":"https:\/\/www.db2go.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=736"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.db2go.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=736"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.db2go.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=736"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}