Cannot connect Jenkins jlnp slaves to Centos 7 master installed using Docker jenkins/jenkins? -

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jenkins centos 7 master installed docker jenkins/jenkins.

i cannot connect old windows 7, macos, , linux slaves master using jlnp.

usually jenkins slave agent displays:

  • "trying protocol: jnlp4-connect"
  • "terminated"
  • repeat

clues:

  • occasionally windows7 "jenkins slave agent" display "connected".
  • however, jenkins master displays node not connected.

installed using:

sudo systemctl start docker sudo docker pull jenkins/jenkins sudo docker run --name jenkins -p 8080:8080 -p 50000:50000 -u 1001 -v /home/jenkins/jenkins:/var/jenkins_home jenkins/jenkins sudo firewall-cmd --zone=public --add-port=8080/tcp --permanent sudo firewall-cmd --zone=public --add-service=http --permanent sudo firewall-cmd --reload

added clues:

  • this first time using docker install of jenkins.
  • it running /home/jenkins/jenkins.
  • i can find no useful clues in /jenkins/logs/slaves/

  • i tied disabling centos & firewall on both master , slave

    i docker newbie.

    sudo docker logs -f jenkins

displayed jnlp4 connect error saying root not writable.

my issue sounds similar this:

docker-slave never connects master if user defined in configuration #474

i changed run lts version , can connect slave:

sudo docker run -p 8080:8080 -p 50000:50000 -v jenkins_home:/var/jenkins_home jenkins/jenkins:lts





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