Kubernetes pligin for jenkins

[adrian lee]

Hi all

I am trying to use jenkins and kubernetes plugin. I deployed a kubernetes cluster in AWS using kubeadm and I installed jenkins on a EC2 VM.

I configured the plugin such that its using Kubernetes server certificate key to connect

I am trying to initiate the deployment of pods in the kubernetes clusters using pipelines in jenkins.

However I keep getting an agent time out 

Any help?

Feb 06, 2020 1:32:59 AM WARNING org.csanchez.jenkins.plugins.kubernetes.KubernetesLauncher launch

Error in provisioning; agent=KubernetesSlave name: mypod-j3d11-nwjvt, template=PodTemplate{, name='mypod-j3d11', label='mypod', nodeUsageMode=EXCLUSIVE, workspaceVolume=EmptyDirWorkspaceVolume [memory=false], containers=[ContainerTemplate{name='golang', image='golang:1.8.0', command='cat', ttyEnabled=true}], annotations=[org.csanchez.jenkins.plugins.kubernetes.PodAnnotation@aab9c821]}
java.lang.IllegalStateException: Containers are terminated with exit codes: {jnlp=255}
	at org.csanchez.jenkins.plugins.kubernetes.KubernetesLauncher.checkTerminatedContainers(KubernetesLauncher.java:224)
	at org.csanchez.jenkins.plugins.kubernetes.KubernetesLauncher.launch(KubernetesLauncher.java:181)
	at hudson.slaves.SlaveComputer.lambda$_connect$0(SlaveComputer.java:292)
	at jenkins.util.ContextResettingExecutorService$2.call(ContextResettingExecutorService.java:46)
	at jenkins.security.ImpersonatingExecutorService$2.call(ImpersonatingExecutorService.java:71)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)

this is my template below which I am using in my pipeline

podTemplate(cloud: 'kubernetes', label: 'mypod',containers: [
    containerTemplate(name: 'golang', image: 'golang:1.8.0', ttyEnabled: true, command: 'cat')
  ]) {

    node('mypod') {

        stage('Get a Golang project') {
            git url: 'https://github.com/hashicorp/terraform.git'
            container('golang') {
                stage('Build a Go project') {
                    sh 'echo hello world'
                }
            }
        }

    }
}

[adrian lee]

On Thursday, February 6, 2020 at 9:53:53 AM UTC+8, adrian lee wrote:

Hi all

I am trying to use jenkins and kubernetes plugin. I deployed a kubernetes cluster in AWS using kubeadm and I installed jenkins on a EC2 VM.

I configured the plugin such that its using Kubernetes server certificate key to connect

I am trying to initiate the deployment of pods in the kubernetes clusters using pipelines in jenkins.

However I keep getting an agent time out 

Any help?

Error in provisioning; agent=KubernetesSlave name: mypod-j3d11-nwjvt, template=PodTemplate{, name='mypod-j3d11', label='mypod', nodeUsageMode=EXCLUSIVE, workspaceVolume=EmptyDirWorkspaceVolume [memory=false], containers=[ContainerTemplate{name='golang', image='golang:1.8.0', command='cat', ttyEnabled=true}], annotations=[org.csanchez.jenkins.plugins.kubernetes.PodAnnotation@aab9c821]}. Container jnlp exited with error 255. Logs: Feb 06, 2020 1:32:28 AM org.jenkinsci.remoting.engine.WorkDirManager setupLogging
INFO: Both error and output logs will be printed to /home/jenkins/agent/remoting
Feb 06, 2020 1:32:28 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Locating server among [http://xxxxxxx.ap-southeast-1.compute.amazonaws.com:8080/]
Feb 06, 2020 1:32:58 AM hudson.remoting.jnlp.Main$CuiListener error
SEVERE: Failed to connect to http://xxxxxxx.ap-southeast-1.compute.amazonaws.com:8080/tcpSlaveAgentListener/: connect timed out
java.io.IOException: Failed to connect to http://ec2-18-140-64-62.ap-southeast-1.compute.amazonaws.com:8080/tcpSlaveAgentListener/: connect timed out
	at org.jenkinsci.remoting.engine.JnlpAgentEndpointResolver.resolve(JnlpAgentEndpointResolver.java:206)
	at hudson.remoting.Engine.innerRun(Engine.java:527)
	at hudson.remoting.Engine.run(Engine.java:488)
Caused by: java.net.SocketTimeoutException: connect timed out
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at org.jenkinsci.remoting.engine.JnlpAgentEndpointResolver.resolve(JnlpAgentEndpointResolver.java:203)
	... 2 more

Feb 06, 2020 1:32:59 AM WARNING org.csanchez.jenkins.plugins.kubernetes.KubernetesLauncher launch

Error in provisioning; agent=KubernetesSlave name: mypod-j3d11-nwjvt, template=PodTemplate{, name='mypod-j3d11', label='mypod', nodeUsageMode=EXCLUSIVE, workspaceVolume=EmptyDirWorkspaceVolume [memory=false], containers=[ContainerTemplate{name='golang', image='golang:1.8.0', command='cat', ttyEnabled=true}], annotations=[org.csanchez.jenkins.plugins.kubernetes.PodAnnotation@aab9c821]}
java.lang.IllegalStateException: Containers are terminated with exit codes: {jnlp=255}
	at org.csanchez.jenkins.plugins.kubernetes.KubernetesLauncher.checkTerminatedContainers(KubernetesLauncher.java:224)
	at org.csanchez.jenkins.plugins.kubernetes.KubernetesLauncher.launch(KubernetesLauncher.java:181)
	at hudson.slaves.SlaveComputer.lambda$_connect$0(SlaveComputer.java:292)
	at jenkins.util.ContextResettingExecutorService$2.call(ContextResettingExecutorService.java:46)
	at jenkins.security.ImpersonatingExecutorService$2.call(ImpersonatingExecutorService.java:71)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)

[Liejun Tao]

Suggest to run a test pod from your cluster and check network connectivity to your jenkins, http://ec2-18-140-64-62.ap-southeast-1.compute.amazonaws.com:8080/

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Thanks,

Baibai

[adrian lee]

 I ran a pod in my cluster  exec the pod and ping my jenkins with no issue.

To view this discussion on the web visit https://groups.google.com/d/msgid/jenkinsci-users/CAMRm5jbyJnwdUxiYRd6hYqg8H-PLrzSg4uA1o%3DF2yObKriCgBw%40mail.gmail.com.

[Liejun Tao]

Try to test beyond ping.

As the error message indicate:

curl http://xxxxxxx.ap-southeast-1.compute.amazonaws.com:8080/tcpSlaveAgentListener/

You should get something.

In Jenkins master, Configure Global Security -> Agent -> TCP port for inbound agents, the default value is 50000.

Try to curl the 50000 port too

for example:

# curl http://xxxx:50000                 

Jenkins-Agent-Protocols: JNLP4-connect, Ping
Jenkins-Version: 2.176.4
Jenkins-Session: c0470948
Client: 10.0.181.80
Server: 10.0.78.182
Remoting-Minimum-Version: 3.4

To view this discussion on the web visit https://groups.google.com/d/msgid/jenkinsci-users/CAJi3E4QeV_Bs-eH2pWh_aHrfUbbvAhTS8syrsKDKGyfQrD5Zcw%40mail.gmail.com.

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Thanks,

Baibai