Uploaded image for project: 'Jenkins'
  1. Jenkins
  2. JENKINS-64842

Docker Swarm agents not connecting to jenkins with remoting 4.6

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Details

    • Bug
    • Status: Open (View Workflow)
    • Major
    • Resolution: Unresolved
    • remoting
    • None

    Description

      We recently set up a new Jenkins and Swarm setup, it came with the remoting 4.6.

      We are seeing our Agents not able to connect and get stuck here:

      In the Docker Swarm Cloud Config the Jenkins url is set to : http://10.XXX:8080/

      And the swarm url is set to http://10.XYZ:2376

      [6:35:30 PM] Creating Service with Name : agt-of_TestAgents_7-13
      [6:35:30 PM] ServiceSpec created with ID : fbpntizanolp4c1d2d7quyrca
      [6:35:30 PM] ServiceSpec request JSON : {"TaskTemplate":{"ContainerSpec":{"Image":"jenkins-docker-stage.artifactory.svcs.endurance.com/eigi-jenkins-agent-kubernetes","Command":["sh","-cx","curl --connect-timeout 20 --max-time 60 -o agent.jar $DOCKER_SWARM_PLUGIN_JENKINS_AGENT_JAR_URL && java -jar agent.jar -jnlpUrl $DOCKER_SWARM_PLUGIN_JENKINS_AGENT_JNLP_URL -secret $DOCKER_SWARM_PLUGIN_JENKINS_AGENT_SECRET -noReconnect -workDir /tmp"],"Env":["DOCKER_SWARM_PLUGIN_JENKINS_AGENT_SECRET=XXXX","DOCKER_SWARM_PLUGIN_JENKINS_AGENT_JAR_URL=http://10.XXX:8080/jnlpJars/agent.jar","DOCKER_SWARM_PLUGIN_JENKINS_AGENT_JNLP_URL=http://10.XXX:8080/computer/agt-of_TestAgents_7-13/slave-agent.jnlp","DOCKER_SWARM_PLUGIN_JENKINS_AGENT_NAME=agt-of_TestAgents_7-13"],"Dir":"/tmp","User":"jenkins","DNSConfig":{"Nameservers":[],"Search":[],"Options":[]},"Mounts":[{"Target":"/home/jenkins/.ssh","Source":"/var/lib/docker/volumes/JENKINS_SSH/_data","Type":"bind","VolumeOptions":null}],"Hosts":[],"Secrets":[],"Configs":[]},"RestartPolicy":{"Condition":"none","MaxAttempts":0},"Resources":{"Limits":{"NanoCPUs":0,"MemoryBytes":0},"Reservations":{"NanoCPUs":0,"MemoryBytes":0}},"Placement":{"Constraints":[]}},"EndpointSpec":{"Ports":[]},"Name":"agt-of_TestAgents_7-13","Labels":{"ROLE":"jenkins-agent"},"Networks":[]}
      c+ curl --connect-timeout 20 --max-time 60 -o agent.jar http://10.XXX:8080/jnlpJars/agent.jar
      P  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
      N                                 Dload  Upload   Total   Spent    Left  Speed
      �
        0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
      100 1471k  100 1471k    0     0  85.8M      0 --:--:-- --:--:-- --:--:-- 89.8M
      �+ java -jar agent.jar -jnlpUrl http://XXX:8080/computer/agt-of_TestAgents_7-13/slave-agent.jnlp -secret Xxx -noReconnect -workDir /tmp
      WFeb 09, 2021 6:35:32 PM org.jenkinsci.remoting.engine.WorkDirManager initializeWorkDir
      7INFO: Using /tmp/remoting as a remoting work directory
      RFeb 09, 2021 6:35:32 PM org.jenkinsci.remoting.engine.WorkDirManager setupLogging
      BINFO: Both error and output logs will be printed to /tmp/remoting
      ?Feb 09, 2021 6:35:32 PM hudson.remoting.jnlp.Main createEngine
      /INFO: Setting up agent: agt-of_TestAgents_7-13
      EFeb 09, 2021 6:35:32 PM hudson.remoting.jnlp.Main$CuiListener <init>
      1INFO: Jenkins agent is running in headless mode.
      ;Feb 09, 2021 6:35:32 PM hudson.remoting.Engine startEngine
      "INFO: Using Remoting version: 4.6
      WFeb 09, 2021 6:35:32 PM org.jenkinsci.remoting.engine.WorkDirManager initializeWorkDir
      7INFO: Using /tmp/remoting as a remoting work directory
      EFeb 09, 2021 6:35:32 PM hudson.remoting.jnlp.Main$CuiListener status
      HINFO: Locating server among [PRIMARYJENKINSURLIN_GLOBALCONFIG]
      

      What is unique is in the case where it does not work we only see ONE url in the `HINFO: Locating server among [PRIMARYJENKINSURLIN_GLOBALCONFIG]`

      We have another setup on another box with the same version of the Docker Swarm plugin (2.9) but remoting 4.5 and the candidateURLs have two urls `INFO: Locating server among [DOCKERSWARMURLFROMDOCKERCONFIG, PRIMARYJENKINSURL_GLOBALCONFIG]`

       

      We are trying to understand

      1. How do the candidateURLs get set for remoting. Where does it pull that from?

      2. Did something change in this area in remoting 4.6? I see some work with candidateURLs in the commit diff, but not sure entirely related

       

      We are not sure what else to check/try do to get both URLs to show up. If we were to change our JENKINS global config jenkins url to the 10.x url it works.. but we do not want that

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          lorelei_mccollum Lorelei created issue -

          People

            jthompson Jeff Thompson
            lorelei_mccollum Lorelei
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            Dates

              Created:
              Updated: