[JIRA] (JENKINS-58491) Cannot configure Nomad plugin with JCasC

kanthak@freenet.de (JIRA)

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Jul 15, 2019, 6:08:02 AM7/15/19

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Christian Kanthak created an issue

Jenkins /

JENKINS-58491

Cannot configure Nomad plugin with JCasC

Issue Type:	Bug
Assignee:	Ivo Verberk
Components:	nomad-plugin
Created:	2019-07-15 10:07
Environment:	Jenkins 2.176.1 (docker container) Nomad plugin 0.6.5 JCasC plugin 1.23
Labels:	jcasc-compatibility
Priority:	Blocker
Reporter:	Christian Kanthak

JCasC plugin does not apply all of the 'Nomad plugin' related entries from jenkins.yaml although these entries are listed in the JSON schema (<jenkins_url>/configuration-as-code/schema).
In the result the Nomad plugin is not well configured and java.lang.NullPointerException are caused in the plugin's code when a slave is set up (e.g. at org.jenkinsci.plugins.nomad.NomadApi.buildDriverConfig(NomadApi.java:142)).

The missing entries in my case are

org.jenkinsci.plugins.nomad.NomadCloud.jenkinsTunnel
org.jenkinsci.plugins.nomad.NomadSlaveTemplate.remoteFs
org.jenkinsci.plugins.nomad.NomadSlaveTemplate.prefixCmd

If I add them manually to the Jenkins' config.xml the setup of a Nomad slave succeeds.

Beside that the export of the configuration causes an StackOverflowError:

FAILED TO EXPORT
org.jenkinsci.plugins.nomad.NomadSlaveTemplate#cloud: java.lang.StackOverflowError
at java.util.Collections$UnmodifiableCollection$1.<init>(Collections.java:1039)
at java.util.Collections$UnmodifiableCollection.iterator(Collections.java:1038)
...
Caused: java.lang.reflect.InvocationTargetException
at sun.reflect.GeneratedConstructorAccessor133.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at io.jenkins.plugins.casc.impl.configurators.DataBoundConfigurator.describe(DataBoundConfigurator.java:265)
at io.jenkins.plugins.casc.Attribute.describe(Attribute.java:202)
at io.jenkins.plugins.casc.BaseConfigurator.compare(BaseConfigurator.java:391)
at io.jenkins.plugins.casc.impl.configurators.DataBoundConfigurator.describe(DataBoundConfigurator.java:268)
at io.jenkins.plugins.casc.Attribute.describe(Attribute.java:198)

This seems to be caused by recursive loop: The cloud definition contains an arry of node templates. Each template definition contains a cloud object which references the cloud object which this template list belongs to.

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kanthak@freenet.de (JIRA)

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Jul 18, 2019, 8:17:02 AM7/18/19

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Christian Kanthak commented on

JENKINS-58491

Re: Cannot configure Nomad plugin with JCasC

It pointed out that the missing configuration of

org.jenkinsci.plugins.nomad.NomadCloud.jenkinsTunnel
org.jenkinsci.plugins.nomad.NomadSlaveTemplate.remoteFs
org.jenkinsci.plugins.nomad.NomadSlaveTemplate.prefixCmd

was caused by an error of our automatic setup (which led to a missing update of jenkins.yaml).
I will resolve this issue.

However, it is required to configure these values (also they are empty strings) otherwise java.lang.NullPointerException occur in the NomadAPI.java as mentioned above.

Beside that the StackOverflowError is still caused when exporting configuration of such system with casc plugin.

This recursive definition of nomad cloud (once as top level and then for every slave in templates) enforced us to repeat all values. Here it would be nice to just mention the 'name' property for a slave template to assign the corresponding cloud.
If someone arrives here looking for a definition of nomad cloud and slave via casc this worked for us:

 
                                                                jenkins:
  clouds:
  - nomad:
      jenkinsTunnel: ''
      jenkinsUrl: https://jenkins.url
      name: nomad_cloud
      nomadACLCredentialsId: ''
      nomadUrl: http://nomad.url
      prune: true
      slaveUrl: https://jenkins.url/jnlpJars/slave.jar
      workerTimeout: 1
      templates:
      - cloud:
          jenkinsTunnel: ''
          jenkinsUrl: https://jenkins.url
          name: nomad_cloud
          nomadACLCredentialsId: ''
          nomadUrl: http://nomad.url
          prune: true
          slaveUrl: https://jenkins.url/jnlpJars/slave.jar
          workerTimeout: 1
        cpu: 512
        datacenters: data_center
        disk: 4000
        forcePull: true
        hostVolumes: "/etc/ssl/cacerts:/usr/local/openjdk-8/jre/lib/security/cacerts,"
        idleTerminationInMinutes: 10
        image: jenkins/slave:3.29-2
        labels: nomad_slave
        memory: 1024
        mode: NORMAL
        network: bridge
        numExecutors: 1
        prefix: jenkins_
        prefixCmd: ''
        priority: 50
        privileged: false
        region: global
        remoteFs: ''
        reusable: true
 
                                                            