i am using jenkins kubernetes plugin.Configure it and testing a sample pipeline code as below:
podTemplate(containers: [
containerTemplate(name: 'ssh-client', image: 'kroniak/ssh-client:3.6', ttyEnabled: true, command: 'cat')
]) {
node(POD_LABEL) {
stage('container log') {
container('ssh-client') {
sshagent (credentials: ['ContainerExecDecoratorPipelineTest-sshagent']) {
sh 'env'
sh 'ssh-add -L'
sh 'ssh -vT -o "StrictHostKeyChecking=no" git@github.com'
}
}
}
}
}
while this is building i can check my kubernetes cluster and noticed that pods are creating but terminating also after few seconds. It keeps happening infinitely. I even checked with all other sample pipelines. The console output in Jenkins shows :
Running in Durability level: MAX_SURVIVABILITY
[Pipeline] Start of Pipeline
[Pipeline] podTemplate
[Pipeline] {
[Pipeline] node
Created Pod: ns-jenkins/tests-14-zm889-hxd6p-j19bl
[Normal][ns-jenkins/tests-14-zm889-hxd6p-j19bl][Scheduled] Successfully assigned ns-jenkins/tests-14-zm889-hxd6p-j19bl to docker-desktop
[Normal][ns-jenkins/tests-14-zm889-hxd6p-j19bl][Pulling] Pulling image "kroniak/ssh-client:3.6"
Still waiting to schedule task
‘tests-14-zm889-hxd6p-j19bl’ is offline
[Normal][ns-jenkins/tests-14-zm889-hxd6p-j19bl][Pulled] Successfully pulled image "kroniak/ssh-client:3.6"
[Normal][ns-jenkins/tests-14-zm889-hxd6p-j19bl][Created] Created container ssh-client
[Normal][ns-jenkins/tests-14-zm889-hxd6p-j19bl][Started] Started container ssh-client
[Normal][ns-jenkins/tests-14-zm889-hxd6p-j19bl][Pulled] Container image "jenkins/inbound-agent:4.3-4" already present on machine
[Normal][ns-jenkins/tests-14-zm889-hxd6p-j19bl][Created] Created container jnlp
[Normal][ns-jenkins/tests-14-zm889-hxd6p-j19bl][Started] Started container jnlp
Created Pod: ns-jenkins/tests-14-zm889-hxd6p-23hwk
[Normal][ns-jenkins/tests-14-zm889-hxd6p-23hwk][Scheduled] Successfully assigned ns-jenkins/tests-14-zm889-hxd6p-23hwk to docker-desktop
[Normal][ns-jenkins/tests-14-zm889-hxd6p-23hwk][Pulled] Container image "kroniak/ssh-client:3.6" already present on machine
[Normal][ns-jenkins/tests-14-zm889-hxd6p-23hwk][Created] Created container ssh-client
[Normal][ns-jenkins/tests-14-zm889-hxd6p-23hwk][Started] Started container ssh-client
[Normal][ns-jenkins/tests-14-zm889-hxd6p-23hwk][Pulled] Container image "jenkins/inbound-agent:4.3-4" already present on machine
[Normal][ns-jenkins/tests-14-zm889-hxd6p-23hwk][Created] Created container jnlp
[Normal][ns-jenkins/tests-14-zm889-hxd6p-23hwk][Started] Started container jnlp
Created Pod: ns-jenkins/tests-14-zm889-hxd6p-wnxr9
[Normal][ns-jenkins/tests-14-zm889-hxd6p-wnxr9][Scheduled] Successfully assigned ns-jenkins/tests-14-zm889-hxd6p-wnxr9 to docker-desktop
[Normal][ns-jenkins/tests-14-zm889-hxd6p-wnxr9][Pulled] Container image "kroniak/ssh-client:3.6" already present on machine
[Normal][ns-jenkins/tests-14-zm889-hxd6p-wnxr9][Created] Created container ssh-client
[Normal][ns-jenkins/tests-14-zm889-hxd6p-wnxr9][Started] Started container ssh-client
[Normal][ns-jenkins/tests-14-zm889-hxd6p-wnxr9][Pulled] Container image "jenkins/inbound-agent:4.3-4" already present on machine
[Normal][ns-jenkins/tests-14-zm889-hxd6p-wnxr9][Created] Created container jnlp
[Normal][ns-jenkins/tests-14-zm889-hxd6p-wnxr9][Started] Started container jnlpI had the same issue. I ran the command kubectl logs -l jenkins=slave -f then I was able to identify the issue.
The issue was Failed to connect to jenkins-agent:50000 so I think the agent pod wasn't able to connect to jenkins-agent on port 50000.
I went to https://your-jenkins-domain.com/configureSecurity/ and set TCP port for inbound agents to 50000.
The issue is gone after I made that change
kubectl logs <jenkins-pod> --namespace=<jenkins-namespace> is a good starting point to start debugging the issue.
When you define your Kubernetes clusters under Manage Jenkins -> Configure System -> Cloud -> Kubernetes Cloud Details, does the Jenkins URL match the Endpoint address in kubectl describe service jenkins?
The Endpoint address must match the Jenkins URL in the Kubernetes Cloud Details
kubectl describe service jenkins -n jenkins | grep Endpoint
Endpoints: 192.168.151.57:8080