{"id":43449,"date":"2023-04-20T19:16:00","date_gmt":"2023-01-08T06:27:42","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%b0%9d%e8%af%95%e4%bd%bf%e7%94%a8opentelemetry%e5%9c%a8node-js%e4%b8%8a%e8%bf%9b%e8%a1%8c%e6%8c%87%e6%a0%87%e6%94%b6%e9%9b%86%e3%80%82\/"},"modified":"2024-04-30T00:25:31","modified_gmt":"2024-04-29T16:25:31","slug":"%e5%b0%9d%e8%af%95%e4%bd%bf%e7%94%a8opentelemetry%e5%9c%a8node-js%e4%b8%8a%e8%bf%9b%e8%a1%8c%e6%8c%87%e6%a0%87%e6%94%b6%e9%9b%86%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%b0%9d%e8%af%95%e4%bd%bf%e7%94%a8opentelemetry%e5%9c%a8node-js%e4%b8%8a%e8%bf%9b%e8%a1%8c%e6%8c%87%e6%a0%87%e6%94%b6%e9%9b%86%e3%80%82\/","title":{"rendered":"\u5c1d\u8bd5\u4f7f\u7528OpenTelemetry\u5728Node.js\u4e0a\u8fdb\u884c\u6307\u6807\u6536\u96c6"},"content":{"rendered":"

\u9996\u5148<\/h1>\n

\u7531\u4e8e\u4e4b\u524d\u5df2\u7ecf\u4f7f\u7528Node.js\uff08JavaScript\uff09\u8fdb\u884c\u4e86OpenTelemetry\u7684\u8ddf\u8e2a\u6570\u636e\u6536\u96c6\uff0c\u6240\u4ee5\u8fd9\u6b21\u6211\u60f3\u603b\u7ed3\u4e00\u4e0b\u5173\u4e8e\u6536\u96c6\u8ba1\u6570\u5668\u503c\u7b49\u5ea6\u91cf\u6570\u636e\u7684\u60c5\u51b5\u3002<\/p>\n

\u6709\u5173OpenTelemetry\u7684\u6982\u8ff0\u548c\u8ddf\u8e2a\u6570\u636e\u6536\u96c6\u7684\u6587\u7ae0\u8bf7\u53c2\u9605\u6b64\u5904\u3002<\/p>\n

\u5c1d\u8bd5\u4e00\u4e0b<\/h1>\n
\"architecture.png\"<\/div>\n

\u6267\u884c\u73af\u5883<\/h1>\n
    \n
  • \n
      MacOS X<\/ul>\n<\/li>\n<\/ul>\n

       <\/p>\n

        \n
      • \n
          node: v13.8.0<\/ul>\n<\/li>\n<\/ul>\n

           <\/p>\n

            \n
          • \n
              npm: v7.5.3<\/ul>\n<\/li>\n<\/ul>\n

               <\/p>\n

                \n
              • \n
                  express: v4.17.1<\/ul>\n<\/li>\n<\/ul>\n

                   <\/p>\n

                    OpenTelemetry: v0.18<\/ul>\n

                    1. \u521b\u5efa\u6837\u672c\u914d\u7f6e<\/h1>\n

                    \u9996\u5148\u521b\u5efa\u4e00\u4e2a\u57fa\u672c\u7684\u793a\u4f8b\u5e94\u7528\u7a0b\u5e8f\u3002
                    \n\u793a\u4f8b\u7684\u5185\u5bb9\u662f\uff0c\u5f53\u8bbf\u95eeURL\u65f6\uff0c\u4f1a\u8fd4\u56de\u7ea2\u8272\u3001\u84dd\u8272\u6216\u9ec4\u8272\u4e2d\u7684\u4e00\u79cd\uff0c\u8fd9\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u903b\u8f91\u3002<\/p>\n

                    1.1 \u521b\u5efa\u6837\u672c<\/h2>\n

                    \u5728\u9879\u76ee\u4e2d\u5b89\u88c5Express\u3002<\/p>\n

                    $ <\/span>npm install <\/span>express\r\n<\/code><\/pre>\n
                    \u521b\u5efa\u5e94\u7528\u7a0b\u5e8f(app.js)\u3002<\/p>\n
                    '<\/span>use strict<\/span>'<\/span>;<\/span>\r\n\r\nconst<\/span> express<\/span> =<\/span> require<\/span>(<\/span>'<\/span>express<\/span>'<\/span>);<\/span>\r\nconst<\/span> app<\/span> =<\/span> express<\/span>();<\/span>\r\nconst<\/span> PORT<\/span> =<\/span> process<\/span>.<\/span>env<\/span>.<\/span>PORT<\/span> ||<\/span> '<\/span>8080<\/span>'<\/span>;<\/span>\r\n\r\napp<\/span>.<\/span>use<\/span>(<\/span>function<\/span>(<\/span>req<\/span>,<\/span> res<\/span>,<\/span> next<\/span>)<\/span> {<\/span>\r\n  \/\/ \u30e9\u30f3\u30c0\u30e0\u3067\u8272\u3092\u9078\u3076<\/span>\r\n  const<\/span> color<\/span> =<\/span> [<\/span>'<\/span>red<\/span>'<\/span>,<\/span> '<\/span>blue<\/span>'<\/span>,<\/span> '<\/span>blue<\/span>'<\/span>,<\/span> '<\/span>yellow<\/span>'<\/span>,<\/span> '<\/span>yellow<\/span>'<\/span>,<\/span> '<\/span>yellow<\/span>'<\/span>];<\/span>\r\n  res<\/span>.<\/span>locals<\/span>.<\/span>color<\/span> =<\/span> color<\/span>[<\/span>Math<\/span>.<\/span>floor<\/span>(<\/span>Math<\/span>.<\/span>random<\/span>()<\/span> *<\/span> color<\/span>.<\/span>length<\/span>)];<\/span>\r\n  next<\/span>();<\/span>\r\n});<\/span>\r\n\r\napp<\/span>.<\/span>get<\/span>(<\/span>'<\/span>\/<\/span>'<\/span>,<\/span> (<\/span>req<\/span>,<\/span> res<\/span>,<\/span> next<\/span>)<\/span> =><\/span> {<\/span>\r\n  res<\/span>.<\/span>send<\/span>(<\/span>res<\/span>.<\/span>locals<\/span>.<\/span>color<\/span>);<\/span>\r\n  next<\/span>();<\/span>\r\n});<\/span>\r\n\r\napp<\/span>.<\/span>listen<\/span>(<\/span>parseInt<\/span>(<\/span>PORT<\/span>,<\/span> 10<\/span>),<\/span> ()<\/span> =><\/span> {<\/span>\r\n  console<\/span>.<\/span>log<\/span>(<\/span>`Listening for requests on http:\/\/localhost:<\/span>${<\/span>PORT<\/span>}<\/span>`<\/span>);<\/span>\r\n});<\/span>\r\n<\/code><\/pre>\n
                    1.2 \u786e\u8ba4\u6837\u672c\u7684\u64cd\u4f5c<\/h2>\n
                    \u8fd0\u884c\u6837\u672c\u540e\uff0c\u4f1a\u5f00\u59cb\u63a5\u53d7\u6765\u81ea\u5ba2\u6237\u7aef\u7684\u8bf7\u6c42\uff0c\u5e76\u5728localhost:8080\u4e0a\u7b49\u5f85\u3002<\/p>\n
                    $ <\/span>node app.js\r\nListening for <\/span>requests on http:\/\/localhost:8080\r\n<\/code><\/pre>\n
                    \u4ece\u53e6\u4e00\u4e2a\u7ec8\u7aef\u8bbf\u95ee\u793a\u4f8b\u7684URL\u3002<\/p>\n
                    $ <\/span>curl localhost:8080\r\nred\r\n<\/code><\/pre>\n
                    \u5982\u4e0a\u6240\u8ff0\uff0c\u5c06\u8fd4\u56de\u7ea2\u8272\u3001\u84dd\u8272\u6216\u9ec4\u8272\u4e2d\u7684\u4efb\u4e00\u79cd\u989c\u8272\u3002<\/p>\n
                    2. Prometheus\u7684\u542f\u52a8<\/h1>\n
                    \u4f5c\u4e3a\u5ea6\u91cf\u6536\u96c6\u7684\u51c6\u5907\u5de5\u4f5c\uff0c\u6211\u4eec\u5c06\u6784\u5efa\u4e00\u4e2aPrometheus\u6765\u5bf9\u5ea6\u91cf\u6570\u636e\u8fdb\u884c\u56fe\u5f62\u5316\u3002\u8fd9\u6b21\u6211\u4eec\u5c06\u4f7f\u7528Docker\u5bb9\u5668\u7248\u672c\u3002<\/p>\n
                    \u5728\u5bb9\u5668\u542f\u52a8\u4e4b\u524d\uff0c\u9996\u5148\u521b\u5efaprometheus.yml\u6587\u4ef6\u3002<\/p>\n
                    global<\/span>:<\/span>\r\n  scrape_interval<\/span>:<\/span> 15s<\/span>\r\n\r\nscrape_configs<\/span>:<\/span>\r\n  -<\/span> job_name<\/span>:<\/span> '<\/span>opentelemetry'<\/span>\r\n    static_configs<\/span>:<\/span>\r\n      -<\/span> targets<\/span>:<\/span> \r\n        -<\/span> '<\/span>host.docker.internal:9464'<\/span>\r\n<\/code><\/pre>\n
                    targets \u662f Prometheus \u4e2d\u6536\u96c6\u5ea6\u91cf\u6570\u636e\u7684\u5730\u65b9\u3002
                    \n\u672c\u6b21\u5c06\u4f5c\u4e3a\u4e3b\u673a\uff0c\u4f46\u4ece\u5bb9\u5668\u7684\u89d2\u5ea6\u6765\u770b\uff0c\u4e3b\u673a\u4e0d\u662f localhost\uff0c\u800c\u662f host.docker.internal\uff08localhost \u662f\u6307\u5bb9\u5668\uff09\u3002
                    \n\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0chost.docker.internal \u5728 Linux \u4e0a\u65e0\u6cd5\u4f7f\u7528\uff08\u4f46\u5728 Mac \u548c Windows \u4e0a\u53ef\u4ee5\uff09\uff0c\u56e0\u6b64\u5728 Linux \u73af\u5883\u4e2d\uff0c\u8bf7\u5c06\u5176\u66ff\u6362\u4e3a\u4e3b\u673a\u7684 IP \u5730\u5740\u3002<\/p>\n
                    docker run \\<\/span>\r\n    -d<\/span> \\<\/span>\r\n    -p<\/span> 9090:9090 \\<\/span>\r\n    -v<\/span> \/path\/to\/prometheus.yml:\/etc\/prometheus\/prometheus.yml \\<\/span>\r\n    prom\/prometheus\r\n<\/code><\/pre>\n
                    \u8bbf\u95ee localhost:9090\uff0c\u82e5\u51fa\u73b0 Prometheus \u7684\u56fe\u5f62\u754c\u9762\uff0c\u5219\u8868\u793a\u542f\u52a8\u6210\u529f\u3002<\/p>\n
                    \"prometheus1.png\"<\/div>\n
                    3. OpenTelemetry\u7684\u96c6\u6210<\/h1>\n
                    \u73b0\u5728\uff0c\u6211\u4eec\u5c06\u5728\u4e4b\u524d\u5236\u4f5c\u7684\u793a\u4f8b\u4e2d\uff0c\u96c6\u6210OpenTelemetry\u8fdb\u884c\u6307\u6807\u6570\u636e\u6536\u96c6\u3002<\/p>\n
                    3.1 \u5b89\u88c5\u8f6f\u4ef6\u5305<\/h2>\n
                    $ <\/span>npm install<\/span> @opentelemetry\/metrics @opentelemetry\/exporter-prometheus\r\n<\/code><\/pre>\n
                    \u521b\u5efa3.2 monitoring.js<\/h2>\n
                    \u6211\u4f1a\u521b\u5efa\u4e00\u4e2a\u5c06\u8ba1\u6570\u5668\u903b\u8f91\u5d4c\u5165\u6837\u672c\u4e2d\u7684\u65b9\u6cd5\u3002<\/p>\n
                    '<\/span>use strict<\/span>'<\/span>;<\/span>\r\n\r\nconst<\/span> {<\/span> MeterProvider<\/span> }<\/span> =<\/span> require<\/span>(<\/span>'<\/span>@opentelemetry\/metrics<\/span>'<\/span>);<\/span>\r\nconst<\/span> {<\/span> PrometheusExporter<\/span> }<\/span> =<\/span> require<\/span>(<\/span>'<\/span>@opentelemetry\/exporter-prometheus<\/span>'<\/span>);<\/span>\r\n\r\nconst<\/span> prometheusPort<\/span> =<\/span> PrometheusExporter<\/span>.<\/span>DEFAULT_OPTIONS<\/span>.<\/span>port<\/span>\r\nconst<\/span> prometheusEndpoint<\/span> =<\/span> PrometheusExporter<\/span>.<\/span>DEFAULT_OPTIONS<\/span>.<\/span>endpoint<\/span>\r\nconst<\/span> exporter<\/span> =<\/span> new<\/span> PrometheusExporter<\/span>(<\/span>\r\n  {<\/span>\r\n    startServer<\/span>:<\/span> true<\/span>,<\/span>\r\n  },<\/span>\r\n  ()<\/span> =><\/span> {<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>\r\n      `prometheus scrape endpoint: http:\/\/localhost:<\/span>${<\/span>prometheusPort<\/span>}${<\/span>prometheusEndpoint<\/span>}<\/span>`<\/span>,<\/span>\r\n    );<\/span>\r\n  },<\/span>\r\n);<\/span>\r\n\r\nconst<\/span> meter<\/span> =<\/span> new<\/span> MeterProvider<\/span>({<\/span>\r\n  exporter<\/span>,<\/span>\r\n  interval<\/span>:<\/span> 1000<\/span>,<\/span>\r\n}).<\/span>getMeter<\/span>(<\/span>'<\/span>color-meter<\/span>'<\/span>);<\/span>\r\n\r\nconst<\/span> colorCount<\/span> =<\/span> meter<\/span>.<\/span>createCounter<\/span>(<\/span>'<\/span>colors<\/span>'<\/span>,<\/span> {<\/span>\r\n  description<\/span>:<\/span> '<\/span>Count each color<\/span>'<\/span>\r\n});<\/span>\r\n\r\n\/\/ \u8272\u3054\u3068\u306bCounter\u3092\u751f\u6210\u3059\u308b<\/span>\r\nconst<\/span> redCounter<\/span> =<\/span> colorCount<\/span>.<\/span>bind<\/span>({<\/span> color<\/span>:<\/span> '<\/span>red<\/span>'<\/span>});<\/span>\r\nconst<\/span> blueCounter<\/span> =<\/span> colorCount<\/span>.<\/span>bind<\/span>({<\/span> color<\/span>:<\/span> '<\/span>blue<\/span>'<\/span>});<\/span>\r\nconst<\/span> yellowCounter<\/span> =<\/span> colorCount<\/span>.<\/span>bind<\/span>({<\/span> color<\/span>:<\/span> '<\/span>yellow<\/span>'<\/span>});<\/span>\r\n\r\nmodule<\/span>.<\/span>exports<\/span>.<\/span>countColorRequests<\/span> =<\/span> ()<\/span> =><\/span> {<\/span>\r\n  return<\/span> (<\/span>req<\/span>,<\/span> res<\/span>,<\/span> next<\/span>)<\/span> =><\/span> {<\/span>\r\n    switch<\/span> (<\/span>res<\/span>.<\/span>locals<\/span>.<\/span>color<\/span>)<\/span> {<\/span>\r\n      case<\/span> '<\/span>red<\/span>'<\/span>:<\/span>\r\n        redCounter<\/span>.<\/span>add<\/span>(<\/span>1<\/span>);<\/span>\r\n        break<\/span>;<\/span>\r\n      case<\/span> '<\/span>blue<\/span>'<\/span>:<\/span>\r\n        blueCounter<\/span>.<\/span>add<\/span>(<\/span>1<\/span>);<\/span>\r\n        break<\/span>;<\/span>\r\n      case<\/span> '<\/span>yellow<\/span>'<\/span>:<\/span>\r\n        yellowCounter<\/span>.<\/span>add<\/span>(<\/span>1<\/span>);<\/span>\r\n        break<\/span>;<\/span>\r\n    }<\/span>\r\n    next<\/span>();<\/span>\r\n  };<\/span>\r\n};<\/span>\r\n<\/code><\/pre>\n
                    \u4f7f\u7528 `meter.createCounter()` \u6765\u521b\u5efa\u8ba1\u6570\u5668\u3002
                    \n\u4f20\u5165\u7684\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u4f1a\u4f5c\u4e3a\u6307\u6807\u6570\u636e\u8868\u7684\u8868\u540d\u3002<\/p>\n
                    \u4e3a\u4e86\u5c06\u6bcf\u4e2a\u5df2\u5f52\u8fd8\u989c\u8272\u7684\u8ba1\u6570\u5668\u503c\u7ed8\u5236\u6210\u56fe\u8868\uff0c\u6211\u4eec\u5c06\u5728\u4ee5\u4e0b\u793a\u4f8b\u4e2d\u4f7f\u7528meter.createCounter()\u521b\u5efa\u8ba1\u6570\u5668\uff0c\u5e76\u5c06\u6807\u7b7e\u7ed1\u5b9a\u5230\u8be5\u8ba1\u6570\u5668\uff0c\u4ece\u800c\u521b\u5efa\u4e09\u4e2a\u989c\u8272\u7684\u8ba1\u6570\u5668\u3002
                    \n\u5728\u8fd9\u91cc\u6307\u5b9a\u7684color: ‘red’\u76f8\u5f53\u4e8e\u56fe\u8868\u7684\u7cfb\u5217\u540d\u79f0\u3002<\/p>\n
                    const redCounter = colorCount.bind({ color: 'red'});\r\n<\/code><\/pre>\n
                    \u5c06\u6837\u54c1\u96c6\u6210<\/h2>\n
                    \u5c06\u521a\u521a\u521b\u5efa\u7684monitoring.js\u6587\u4ef6\u96c6\u6210\u5230\u793a\u4f8b\u4e2d\u3002<\/p>\n
                    '<\/span>use strict<\/span>'<\/span>;<\/span>\r\n\r\nconst<\/span> express<\/span> =<\/span> require<\/span>(<\/span>'<\/span>express<\/span>'<\/span>);<\/span>\r\nconst<\/span> app<\/span> =<\/span> express<\/span>();<\/span>\r\nconst<\/span> PORT<\/span> =<\/span> process<\/span>.<\/span>env<\/span>.<\/span>PORT<\/span> ||<\/span> '<\/span>8080<\/span>'<\/span>;<\/span>\r\n\r\n+ <\/span>const<\/span> {<\/span> countColorRequests<\/span> }<\/span> =<\/span> require<\/span>(<\/span>\"<\/span>.\/monitoring<\/span>\"<\/span>);<\/span>\r\n<\/span>\r\napp<\/span>.<\/span>use<\/span>(<\/span>function<\/span>(<\/span>req<\/span>,<\/span> res<\/span>,<\/span> next<\/span>)<\/span> {<\/span>\r\n  \/\/ \u30e9\u30f3\u30c0\u30e0\u3067\u8272\u3092\u9078\u3076<\/span>\r\n  const<\/span> color<\/span> =<\/span> [<\/span>'<\/span>red<\/span>'<\/span>,<\/span> '<\/span>blue<\/span>'<\/span>,<\/span> '<\/span>blue<\/span>'<\/span>,<\/span> '<\/span>yellow<\/span>'<\/span>,<\/span> '<\/span>yellow<\/span>'<\/span>,<\/span> '<\/span>yellow<\/span>'<\/span>];<\/span>\r\n  res<\/span>.<\/span>locals<\/span>.<\/span>color<\/span> =<\/span> color<\/span>[<\/span>Math<\/span>.<\/span>floor<\/span>(<\/span>Math<\/span>.<\/span>random<\/span>()<\/span> *<\/span> color<\/span>.<\/span>length<\/span>)];<\/span>\r\n  next<\/span>();<\/span>\r\n});<\/span>\r\n\r\n+ <\/span>app<\/span>.<\/span>use<\/span>(<\/span>countColorRequests<\/span>());<\/span>\r\n<\/span>\r\napp<\/span>.<\/span>get<\/span>(<\/span>'<\/span>\/<\/span>'<\/span>,<\/span> (<\/span>req<\/span>,<\/span> res<\/span>,<\/span> next<\/span>)<\/span> =><\/span> {<\/span>\r\n  res<\/span>.<\/span>send<\/span>(<\/span>res<\/span>.<\/span>locals<\/span>.<\/span>color<\/span>);<\/span>\r\n  next<\/span>();<\/span>\r\n});<\/span>\r\n\r\napp<\/span>.<\/span>listen<\/span>(<\/span>parseInt<\/span>(<\/span>PORT<\/span>,<\/span> 10<\/span>),<\/span> ()<\/span> =><\/span> {<\/span>\r\n  console<\/span>.<\/span>log<\/span>(<\/span>`Listening for requests on http:\/\/localhost:<\/span>${<\/span>PORT<\/span>}<\/span>`<\/span>);<\/span>\r\n});<\/span>\r\n<\/code><\/pre>\n
                    \u5728\u4f7f\u7528Math.random()\u65b9\u6cd5\u9009\u62e9\u989c\u8272\u540e\uff0c\u8c03\u7528countColorRequests()\u51fd\u6570\uff0c\u5e76\u5bf9\u9009\u5b9a\u7684\u989c\u8272\u8ba1\u6570\u5668\u8fdb\u884c\u9012\u589e\u64cd\u4f5c\u3002<\/p>\n
                    3.4 \u52a8\u4f5c\u786e\u8ba4<\/h2>\n
                    \u548c\u7b2c\u4e00\u7ae0\u7c7b\u4f3c\uff0c\u4f1a\u542f\u52a8\u793a\u4f8b\u3002\u4e00\u65e6\u542f\u52a8\uff0c\u9664\u4e86\u7b49\u5f85localhost:8080\u7684\u8bf7\u6c42\u5916\uff0c\u8fd8\u4f1a\u7b49\u5f85\u6765\u81eaPrometheus\u7684\u6307\u6807\u6570\u636e\u83b7\u53d6\uff08Pull\uff09\u5728localhost:9464\/metrics\u4e0a\u3002<\/p>\n
                    $ <\/span>node app.js \r\nListening for <\/span>requests on http:\/\/localhost:8080\r\nprometheus scrape endpoint: http:\/\/localhost:9464\/metrics\r\n<\/code><\/pre>\n
                    \u6211\u5c06\u8fde\u7eed100\u6b21\u53d1\u9001\u6837\u672c\u8bf7\u6c42\uff0c\u5e76\u589e\u52a0\u8ba1\u6570\u5668\u7684\u503c\u3002<\/p>\n
                    $ for var in `seq 100`; do curl localhost:8080; done\r\n<\/code><\/pre>\n
                    \u60a8\u53ef\u4ee5\u901a\u8fc7\u8bbf\u95eelocalhost:9464\/metrics\u6765\u67e5\u770b\u8ba1\u6570\u5668\u503c\u3002\uff08Prometheus\u5b9a\u671f\u6536\u96c6\u6b64\u4fe1\u606f\uff09<\/p>\n
                    $ <\/span>curl http:\/\/localhost:9464\/metrics\r\n# HELP colors Count each color<\/span>\r\n# TYPE colors counter<\/span>\r\ncolors{<\/span>color<\/span>=<\/span>\"red\"<\/span>}<\/span> 14 1615214799584\r\ncolors{<\/span>color<\/span>=<\/span>\"blue\"<\/span>}<\/span> 32 1615214799558\r\ncolors{<\/span>color<\/span>=<\/span>\"yellow\"<\/span>}<\/span> 54 1615214799597\r\n<\/code><\/pre>\n
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                    \"prometheus.png\"<\/div>\n
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                    \u5173\u4e8eOpenTelemetry\uff0c\u5982\u679c\u8fd8\u6709\u5176\u4ed6\u6709\u8da3\u7684\u529f\u80fd\uff0c\u6211\u60f3\u5c1d\u8bd5\u4e00\u4e0b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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