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  1. Jenkins
  2. JENKINS-60798

Setup Kubernetes CLI (kubectl) error: "FATAL: Failed to run kubectl version 1"

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    • kubernetes 1.23.3

      In latest release (1.23.0) I'm getting the below error while trying to use the "Setup Kubernetes CLI (kubectl)" in a job where field "Certificate of authority" is empty and field "Credentials" is populated from type "Username and password":

      [...]
Building in workspace /var/jenkins_home/workspace/backups
$ kubectl version
FATAL: Failed to run kubectl version 1
java.io.IOException: Failed to run kubectl version 1
at org.csanchez.jenkins.plugins.kubernetes.KubectlBuildWrapper.setUp(KubectlBuildWrapper.java:94)
at jenkins.tasks.SimpleBuildWrapper.setUp(SimpleBuildWrapper.java:146)
at hudson.model.Build$BuildExecution.doRun(Build.java:157)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:504)
at hudson.model.Run.execute(Run.java:1853)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:97)
at hudson.model.Executor.run(Executor.java:427)
Finished: FAILURE

      The previous version (1.22.5) works fine and after downgrading all jobs started to work again.
      This happened in two independent Jenkins boxes running the latest LTS Jenkins ver. 2.204.1.

       

      After further investigation, the issue seems to be related to kubernetes config file setup. Although I didn't specify a certificate, the property insecure-skip-tls-verify is set to false, plus the current-context is not set. Sample generated file below: 

      $ cat .kube2280516965942825275config
---
clusters:
- cluster:
 insecure-skip-tls-verify: false
 server: "https://api.k8s-cluster.dummy.com"
 name: "k8s"
contexts:
- context:
 cluster: "k8s"
 user: "cluster-admin"
 name: "k8s"
users:
- name: "cluster-admin"
 user:
 as-user-extra: {}
 password: "XXXXXXXXXXXXX"
 username: "jenkins"

       

          [JENKINS-60798] Setup Kubernetes CLI (kubectl) error: "FATAL: Failed to run kubectl version 1"

          João Salavessa created issue -
          João Salavessa made changes -
          Description Original: {{In latest release (1.23.0) I'm getting the below error while trying to use the "*Setup Kubernetes CLI (kubectl)*" in a job where field "_Certificate of authority_" is empty and field "_Credentials_" is populated from type "_Username and password_":}}
          {{}}
          {code:java}
          [...]
          Building in workspace /var/jenkins_home/workspace/backups
          $ kubectl version
          FATAL: Failed to run kubectl version 1
          java.io.IOException: Failed to run kubectl version 1
          at org.csanchez.jenkins.plugins.kubernetes.KubectlBuildWrapper.setUp(KubectlBuildWrapper.java:94)
          at jenkins.tasks.SimpleBuildWrapper.setUp(SimpleBuildWrapper.java:146)
          at hudson.model.Build$BuildExecution.doRun(Build.java:157)
          at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:504)
          at hudson.model.Run.execute(Run.java:1853)
          at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
          at hudson.model.ResourceController.execute(ResourceController.java:97)
          at hudson.model.Executor.run(Executor.java:427)
          Finished: FAILURE{code}
          The previous version (_1.22.5_) works fine and after downgrading all jobs started to work again.
          This happened in two independent Jenkins boxes running the latest LTS Jenkins ver. 2.204.1.           		New: In latest release (1.23.0) I'm getting the below error while trying to use the "*Setup Kubernetes CLI (kubectl)*" in a job where field "_Certificate of authority_" is empty and field "_Credentials_" is populated from type "_Username and password_":
          {code}
          [...]
          Building in workspace /var/jenkins_home/workspace/backups
          $ kubectl version
          FATAL: Failed to run kubectl version 1
          java.io.IOException: Failed to run kubectl version 1
          at org.csanchez.jenkins.plugins.kubernetes.KubectlBuildWrapper.setUp(KubectlBuildWrapper.java:94)
          at jenkins.tasks.SimpleBuildWrapper.setUp(SimpleBuildWrapper.java:146)
          at hudson.model.Build$BuildExecution.doRun(Build.java:157)
          at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:504)
          at hudson.model.Run.execute(Run.java:1853)
          at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
          at hudson.model.ResourceController.execute(ResourceController.java:97)
          at hudson.model.Executor.run(Executor.java:427)
          Finished: FAILURE{code}
          The previous version (_1.22.5_) works fine and after downgrading all jobs started to work again.
           This happened in two independent Jenkins boxes running the latest LTS Jenkins ver. 2.204.1.

           

          After further investigation, the issue seems to be related to kubernetes config file setup. Although I didn't specify a certificate, the property _*insecure-skip-tls-verify*_ is set to *_false_*, plus the *_current-context_* is *_not set._* Sample generated file below: 
          {code}
          $ cat .kube2280516965942825275config
          ---
          clusters:
          - cluster:
           insecure-skip-tls-verify: false
           server: "https://api.k8s-cluster.dummy.com"
           name: "k8s"
          contexts:
          - context:
           cluster: "k8s"
           user: "cluster-admin"
           name: "k8s"
          users:
          - name: "cluster-admin"
           user:
           as-user-extra: {}
           password: "XXXXXXXXXXXXX"
           username: "jenkins"{code}
           
          Vincent Latombe made changes -
          Status Original: Open [ 1 ] New: In Progress [ 3 ]
          Vincent Latombe made changes -
          Assignee New: Vincent Latombe [ vlatombe ]
          Vincent Latombe made changes -
          Status Original: In Progress [ 3 ] New: In Review [ 10005 ]
          Vincent Latombe made changes -
          Remote Link New: This issue links to "PR #694 (Web Link)" [ 24329 ]
          Vincent Latombe made changes -
          Resolution New: Fixed [ 1 ]
          Status Original: In Review [ 10005 ] New: Fixed but Unreleased [ 10203 ]
          Vincent Latombe made changes -
          Released As New: kubernetes 1.23.2
          Status Original: Fixed but Unreleased [ 10203 ] New: Resolved [ 5 ]

          João Salavessa added a comment -

          Just tested this with version 1.23.2 and issue is still happening.

          The only difference is the error message in the jenkins job (the generated config file has the same issues).
          [...]
          Building in workspace /var/jenkins_home/workspace/backups
          $ kubectl version
          ERROR: Failed to run kubectl version. Returned status code 1.
          Finished: FAILURE

          João Salavessa added a comment - Just tested this with version 1.23.2 and issue is still happening. The only difference is the error message in the jenkins job (the generated config file has the same issues). [...] Building in workspace /var/jenkins_home/workspace/backups $ kubectl version ERROR: Failed to run kubectl version. Returned status code 1. Finished: FAILURE
          João Salavessa made changes -
          Resolution Original: Fixed [ 1 ]
          Status Original: Resolved [ 5 ] New: Reopened [ 4 ]

            vlatombe Vincent Latombe
            salavessa João Salavessa
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              Created:
              Updated:
              Resolved: