在Heroku上部署clojure网页应用，$ PORT绑定

我写了一个需要快速部署的20分钟的web服务，所以我想到了Heroku。我通过自己的例子去，增加了Procfile按照文档：

web: java $JVM_OPTS -cp target/random-pairs.jar Clojure.main -m random-pairs.system

服务器刚刚码头包裹在一个组件/生命周期接口的实现，所以我补充说，读Heroku的ENV PORT/HOST电话，也没“T需要很长时间：

(defn new [] 
    (let [host (or (System/getenv "HOST") "localhost") 
     port (or (Integer. (System/getenv "PORT")) 8080)] 
    (map->Server {:host host :port port :server nil :database nil})))

然后我被推到Heroku的分支，很高兴地看到，它建立：

remote: -----> Clojure (Leiningen 2) app detected 
remote: -----> Installing OpenJDK 1.8... done 
remote: -----> Using cached Leiningen 2.7.1 
remote:  Writing: lein script 
remote: -----> Building with Leiningen 
remote:  Running: lein uberjar 
remote:  Compiling random-pairs.api 
remote:  Compiling random-pairs.routing 
remote:  Compiling random-pairs.server 
remote:  Compiling random-pairs.system 
remote:  Compiling random-pairs.utils 
remote:  Created /tmp/build_39db3b5354727cb980092a4caa080664/target/random-pairs-0.1.0-SNAPSHOT.jar 
remote:  Created /tmp/build_39db3b5354727cb980092a4caa080664/target/random-pairs.jar 
remote: -----> Discovering process types 
remote:  Procfile declares types -> web 
remote: 
remote: -----> Compressing... 
remote:  Done: 70.5M 
remote: -----> Launching...

我在日志偷看确认：

2017-09-27T10:11:43.214499+00:00 heroku[web.1]: Starting process with command `java $JVM_OPTS -cp target/random-pairs.jar clojure.main -m random-pairs.system` 
2017-09-27T10:11:46.312843+00:00 app[web.1]: Setting JAVA_TOOL_OPTIONS defaults based on dyno size. Custom settings will override them. 
2017-09-27T10:11:46.316262+00:00 app[web.1]: Picked up JAVA_TOOL_OPTIONS: -Xmx300m -Xss512k -Dfile.encoding=UTF-8 
2017-09-27T10:11:49.562990+00:00 app[web.1]: 2017-09-27 10:11:49.559 INFO default org.eclipse.jetty.util.log - Logging initialized @3234ms 
2017-09-27T10:11:50.401779+00:00 app[web.1]: 2017-09-27 10:11:50.401 INFO default random-pairs.system - :random-pairs.system/create-system Creating system 
2017-09-27T10:11:50.404459+00:00 app[web.1]: 2017-09-27 10:11:50.404 INFO default random-pairs.system - :random-pairs.system/start Starting the application 
2017-09-27T10:11:50.409370+00:00 app[web.1]: 2017-09-27 10:11:50.409 INFO default random-pairs.server - :random-pairs.server/server-start Starting Server component host: localhost port: 15701 
2017-09-27T10:11:50.435805+00:00 app[web.1]: 2017-09-27 10:11:50.435 INFO default org.eclipse.jetty.server.Server - jetty-9.2.z-SNAPSHOT 
2017-09-27T10:11:50.478304+00:00 app[web.1]: 2017-09-27 10:11:50.477 INFO default o.e.jetty.server.ServerConnector - Started [email protected]{HTTP/1.1}{localhost:15701} 
2017-09-27T10:11:50.478742+00:00 app[web.1]: 2017-09-27 10:11:50.478 INFO default org.eclipse.jetty.server.Server - Started @4162ms 
2017-09-27T10:11:50.479247+00:00 app[web.1]: 2017-09-27 10:11:50.479 INFO default random-pairs.system - :random-pairs.system/main Application fully functional

不错，Heroku看起来很整齐。所以我继续发送一些请求来测试一切正常。只有它没有。我再一次看着原木，看到：

2017-09-27T10:13:48.345516+00:00 heroku[web.1]: Error R10 (Boot timeout) -> Web process failed to bind to $PORT within 60 seconds of launch 
2017-09-27T10:13:48.345575+00:00 heroku[web.1]: Stopping process with SIGKILL 
2017-09-27T10:13:48.488069+00:00 heroku[web.1]: State changed from starting to crashed 
2017-09-27T10:13:48.476415+00:00 heroku[web.1]: Process exited with status 137

这是以宙斯的名义是什么？无法绑定到$ PORT？我清楚地看到在日志码头拿起港口和系统上线？

来源

2017-09-27 fbielejec

你需要：主机？我认为你只需要端口声明。 –

无论如何，我认为它只会绑定到0.0.0.0，你认为这是问题吗？ – fbielejec

是的，我认为这就是问题 –

我知道会发生什么 - 它是经典的IP4/IP6，“localhost”在heroku云计算机上解析为ip6地址。把0.0.0.0（或者大概也没有按照评论中的建议指定主机）解决了这个问题。

来源

2017-09-27 12:12:03 fbielejec

在Heroku上部署clojure网页应用，$ PORT绑定

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