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Bug
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Resolution: Fixed
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Blocker
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None
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Kubernetes 1.15.6
Kubernetes-plugin 1.23.0
Jenkins LTS 2.204.1
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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"
- links to