Uploaded image for project: 'Jenkins'
  1. Jenkins
  2. JENKINS-73993

Access kubernetes node name to expose it in jenkins logs

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      Hi,

      I would like to be able to access Kubernetes Node where pods are running to log them into Jenkins console log. Searching the web they suggest to do it using envvars and accessing spec info were Kubernetes node is stored and take that info from there:

      Something like:

      spec:
  containers:
  - name: example-container
    image: jenkins/inbound-agent
    env:
    - name: NODE_NAME
      valueFrom:
        fieldRef:
          fieldPath: spec.nodeName

       

       

      ----------------------------------------------------------------------------------------------------------------------------------------
      I tried to define an envvar at container level and pod level (separately, on different runs), but it seems like the info is not fully available or I'm having issues with the envars because defining them even with "hard-coded" string values is not setting them as expected neither:

      adapter.podTemplate(            
    cloud: podTemplate.cloud,            
    namespace: this.namespace,            
    label: podName,                       
    containers: podTemplate.containers,            
    volumes: podTemplate.volumes + this.extraVolumes        
    envars:[
        pod_name:[
            key: "pod_name"
            value: "testing_envars"
        ]
    ]
)

       

       

      At Containertemplate level:

      protected def defaultContainer() {              
    return adapter.containerTemplate(            
        name: containerName,            i
        mage: image,
        ttyEnabled: true,            
        command: this.appType ? "cat": "",            
        privileged: this.appType ? false : true,
        resourceRequestCpu: res.resourceRequestCpu,
        resourceRequestMemory: res.resourceRequestMemory,
        resourceLimitCpu: res.resourceLimitCpu,
        resourceLimitMemory: res.resourceLimitMemory,
        resourceRequestEphemeralStorage:res.resourceRequestEphemeralStorage, 
        envars:[
           pod_name:[
              key: "pod_name"
              value: "testing_envars"
]
        )    
}

       

       

      Neither of them worked, and also at Jenkins console level the error was something like:

      14:26:57  [Pipeline] podTemplate
14:26:57  [Pipeline] // podTemplate
14:26:57  [Pipeline] End of Pipeline
14:26:57  java.lang.UnsupportedOperationException: must specify $class with an implementation of interface java.util.List
14:26:57  	at PluginClassLoader for structs//org.jenkinsci.plugins.structs.describable.DescribableModel.resolveClass(DescribableModel.java:580)
14:26:57  	at PluginClassLoader for structs//org.jenkinsci.plugins.structs.describable.DescribableModel.coerce(DescribableModel.java:479)
14:26:57  	at PluginClassLoader for structs//org.jenkinsci.plugins.structs.describable.DescribableModel.injectSetters(DescribableModel.java:435)
14:26:57  	at PluginClassLoader for structs//org.jenkinsci.plugins.structs.describable.DescribableModel.instantiate(DescribableModel.java:332)
14:26:57  Caused: java.lang.IllegalArgumentException: Could not instantiate {name=worker, image=imagelatest, ttyEnabled=true, command=, privileged=true, resourceRequestCpu=2, resourceRequestMemory=2Gi, resourceLimitCpu=8, resourceLimitMemory=12Gi, resourceRequestEphemeralStorage=null, envVars={key=pod_name, value=testing_envars}} for org.csanchez.jenkins.plugins.kubernetes.ContainerTemplate

       

      Just in case all the other parameters at container level and at pod level are working perfectly.

            Unassigned Unassigned
            juansan993 Juan
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              Created:
              Updated: