我正在使用 jenkins swarm 插件将一个从节点连接到一个主节点。但是，它给出了Connection Refused错误。
我正在使用 docker swarm 在多节点集群上部署它。现在我仅使用单个节点设置进行测试，这是我的设置文件：
version: '3.1'
services:
viz:
image: manomarks/visualizer
volumes:
- "/var/run/docker.sock:/var/run/docker.sock"
ports:
- "8090:8080"
master:
image: myproject-jenkins-master
ports:
- "8080:8080"
- "50000:50000"
volumes:
- ./jenkins_home:/var/jenkins_home
nginx:
image: myproject-jenkins-nginx
ports:
- "80:80"
linuxagent:
image: myproject-jenkins-linuxagent
并且它是使用命令部署的，docker stack deploy因此上述每个服务都有自己的内部负载均衡器。
Jenkins 通过 nginx 在网络上提供服务。但是我还保留了端口 8080 以进行调试。如果我打开浏览器并点击http://localhost或http://localhost:8080，我可以访问 jenkins Web 界面。在 master 上，我已经安装了 jenkinsswarm插件。linuxagent如果我从打算作为从节点的容器进入 bash shell ，我可以 ping 其他 docker 服务，但是当我尝试运行swarm-client-3.3.jar文件时会发生这种情况。
如果我尝试访问 jenkins，我可以通过访问http://myproject_master:8080
root@d139902be5de:~# curl http://myproject_master:8080
<html><head><meta http-equiv='refresh' content='1;url=/login?from=%2F'/><script>window.location.replace('/login?from=%2F');</script></head><body style='background-color:white; color:white;'>
Authentication required
<!--
You are authenticated as: anonymous
Groups that you are in:
Permission you need to have (but didn't): hudson.model.Hudson.Read
... which is implied by: hudson.security.Permission.GenericRead
... which is implied by: hudson.model.Hudson.Administer
-->
</body></html> root@d139902be5de:~#
另外，我可以通过http://myproject_nginx
root@d139902be5de:~# curl http://myproject_nginx
<html><head><meta http-equiv='refresh' content='1;url=/login?from=%2F'/><script>window.location.replace('/login?from=%2F');</script></head><body style='background-color:white; color:white;'>
Authentication required
<!--
You are authenticated as: anonymous
Groups that you are in:
Permission you need to have (but didn't): hudson.model.Hudson.Read
... which is implied by: hudson.security.Permission.GenericRead
... which is implied by: hudson.model.Hudson.Administer
-->
</body></html> root@d139902be5de:~#
如果我尝试为 swarm 启动 jar 文件，我会收到以下错误：
root@d139902be5de:~# java -jar swarm-client-3.3.jar -username mandeep -password 12213 -master http://myproject_nginx
Apr 09, 2017 5:52:44 PM hudson.plugins.swarm.Client main
INFO: Client.main invoked with: [-username mandeep -password 12213 -master http://myproject_nginx]
Apr 09, 2017 5:52:44 PM hudson.plugins.swarm.Client run
INFO: Discovering Jenkins master
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Apr 09, 2017 5:52:44 PM hudson.plugins.swarm.Client run
INFO: Attempting to connect to http://myproject_nginx/ bc1be8e7-eaf0-47ff-8aeb-36f75d6ba081 with ID c84ce43b
Apr 09, 2017 5:52:45 PM hudson.remoting.jnlp.Main createEngine
INFO: Setting up slave: d139902be5de-c84ce43b
Apr 09, 2017 5:52:45 PM hudson.remoting.jnlp.Main$CuiListener <init>
INFO: Jenkins agent is running in headless mode.
Apr 09, 2017 5:52:45 PM hudson.remoting.jnlp.Main$CuiListener status
INFO: Locating server among [http://myproject_nginx/]
Apr 09, 2017 5:52:45 PM hudson.remoting.jnlp.Main$CuiListener status
INFO: Agent discovery successful
Agent address: myproject_nginx
Agent port: 50000
Identity: 86:5b:f3:77:84:92:21:87:95:4c:4b:0e:f7:4e:e5:1d
Apr 09, 2017 5:52:45 PM hudson.remoting.jnlp.Main$CuiListener status
INFO: Handshaking
Apr 09, 2017 5:52:45 PM hudson.remoting.jnlp.Main$CuiListener status
INFO: Connecting to myproject_nginx:50000
Apr 09, 2017 5:52:55 PM hudson.remoting.jnlp.Main$CuiListener status
INFO: Connecting to myproject_nginx:50000 (retrying:2)
java.io.IOException: Failed to connect to myproject_nginx:50000
at org.jenkinsci.remoting.engine.JnlpAgentEndpoint.open(JnlpAgentEndpoint.java:243)
at hudson.remoting.Engine.connect(Engine.java:500)
at hudson.remoting.Engine.innerRun(Engine.java:364)
at hudson.remoting.Engine.run(Engine.java:287)
Caused by: java.net.ConnectException: Connection refused
at sun.nio.ch.Net.connect0(Native Method)
at sun.nio.ch.Net.connect(Net.java:454)
at sun.nio.ch.Net.connect(Net.java:446)
at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:648)
at java.nio.channels.SocketChannel.open(SocketChannel.java:189)
at org.jenkinsci.remoting.engine.JnlpAgentEndpoint.open(JnlpAgentEndpoint.java:204)
... 3 more
似乎问题是从服务器希望主服务器成为myproject_nginx并因此命中50000失败的端口，因为该服务没有50000暴露端口。所以为了这个目的，我已经暴露了端口8080和服务。但是当我尝试那个 url 时，我得到一个不同的错误50000myproject_master
root@d139902be5de:~# java -jar swarm-client-3.3.jar -username mandeep -password 12213 -master http://myproject_master:8080
Apr 09, 2017 5:57:01 PM hudson.plugins.swarm.Client main
INFO: Client.main invoked with: [-username mandeep -password 12213 -master http://myproject_master:8080]
Apr 09, 2017 5:57:01 PM hudson.plugins.swarm.Client run
INFO: Discovering Jenkins master
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Apr 09, 2017 5:57:01 PM hudson.plugins.swarm.Client run
SEVERE: IOexception occurred
java.net.ConnectException: Connection refused (Connection refused)
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at java.net.Socket.connect(Socket.java:538)
at java.net.Socket.<init>(Socket.java:434)
at java.net.Socket.<init>(Socket.java:286)
at org.apache.commons.httpclient.protocol.DefaultProtocolSocketFactory.createSocket(DefaultProtocolSocketFactory.java:80)
at org.apache.commons.httpclient.protocol.DefaultProtocolSocketFactory.createSocket(DefaultProtocolSocketFactory.java:122)
at org.apache.commons.httpclient.HttpConnection.open(HttpConnection.java:707)
at org.apache.commons.httpclient.MultiThreadedHttpConnectionManager$HttpConnectionAdapter.open(MultiThreadedHttpConnectionManager.java:1361)
at org.apache.commons.httpclient.HttpMethodDirector.executeWithRetry(HttpMethodDirector.java:387)
at org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:171)
at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:397)
at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:323)
at hudson.plugins.swarm.SwarmClient.discoverFromMasterUrl(SwarmClient.java:224)
at hudson.plugins.swarm.Client.run(Client.java:115)
at hudson.plugins.swarm.Client.main(Client.java:88)
这是我完全陷入困境并且无法理解如何解决问题的地方。是否会因为从站在负载均衡器后面运行而出现问题？或者我想要完成的架构中有什么根本性的错误吗？我希望能够linuxagent动态扩展服务，以便每个节点都充当从代理，并且只要启动它就与主节点连接。我阅读了swarmjenkins的插件，发现它可以用来实现这种设置