Hi Team,

we are running jenkins master as docker container in DC/OS(mesos) environment.  we have two ports available for setting up the configuration. 

container port 8080 is mapped to service port 29XXXfor jenkins.

container port 50000 is mapped to service port  29XXX for jenkins-agent.

I have configured the jenkins-agent port in manage Jenkins->Global Security->TCP port for JNLP agents. and also tried to give the default port and multiple random ports but while running the agent i get the error as port is not reachable.

SEVERE: https://develop.qa.ampf.com/jenkins/ provided port:41172 is not reachable
java.io.IOException: https://develop.qa.ampf.com/jenkins/ provided port:41172 is not reachable
at org.jenkinsci.remoting.engine.JnlpAgentEndpointResolver.resolve(JnlpAgentEndpointResolver.java:286)
at hudson.remoting.Engine.innerRun(Engine.java:523)
at hudson.remoting.Engine.run(Engine.java:474)
Suppressed: java.io.IOException: http://develop.qa.ampf.com/jenkins/tcpSlaveAgentListener/ is invalid: 302 Found
at org.jenkinsci.remoting.engine.JnlpAgentEndpointResolver.resolve(JnlpAgentEndpointResolver.java:201)
... 2 more

Do i need to mention anything in the tunnel part?

Thanks,

Mohit Saraf