Credentials from Kubernetes Secrets will not be available

Hi,

Could you please help me gaining insight in the following problem:

On the Manage Jenkins Page, I see hundreds of these messages:

“Credentials from Kubernetes Secrets will not be available.See the log for more details.”

When clicking on the log link, I see the following log entry from “com.cloudbees.jenkins.plugins.kubernetes_credentials_provider.KubernetesCredentialProvider.initialize”

"Failed to initialize Kubernetes secret provider

java.net.UnknownHostException: kubernetes.default.svc: Name or service not known
at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:929)
at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1324)
at java.net.InetAddress.getAllByName0(InetAddress.java:1277)
at java.net.InetAddress.getAllByName(InetAddress.java:1193)
at java.net.InetAddress.getAllByName(InetAddress.java:1127)
at okhttp3.Dns$1.lookup(Dns.java:40)
at okhttp3.internal.connection.RouteSelector.resetNextInetSocketAddress(RouteSelector.java:185)
at okhttp3.internal.connection.RouteSelector.nextProxy(RouteSelector.java:149)
at okhttp3.internal.connection.RouteSelector.next(RouteSelector.java:84)
at okhttp3.internal.connection.StreamAllocation.findConnection(StreamAllocation.java:215)
at okhttp3.internal.connection.StreamAllocation.findHealthyConnection(StreamAllocation.java:135)
at okhttp3.internal.connection.StreamAllocation.newStream(StreamAllocation.java:114)
at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:42)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.java:93)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.java:93)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.java:127)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
at io.fabric8.kubernetes.client.utils.BackwardsCompatibilityInterceptor.intercept(BackwardsCompatibilityInterceptor.java:133)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
at io.fabric8.kubernetes.client.utils.TokenRefreshInterceptor.intercept(TokenRefreshInterceptor.java:42)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
at io.fabric8.kubernetes.client.utils.ImpersonatorInterceptor.intercept(ImpersonatorInterceptor.java:68)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
at io.fabric8.kubernetes.client.utils.HttpClientUtils.lambda$createApplicableInterceptors$6(HttpClientUtils.java:286)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
at okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:257)
at okhttp3.RealCall.execute(RealCall.java:93)
at io.fabric8.kubernetes.client.dsl.base.OperationSupport.handleResponse(OperationSupport.java:541)
at io.fabric8.kubernetes.client.dsl.base.OperationSupport.handleResponse(OperationSupport.java:504)
at io.fabric8.kubernetes.client.dsl.base.OperationSupport.handleResponse(OperationSupport.java:487)
at io.fabric8.kubernetes.client.dsl.base.BaseOperation.listRequestHelper(BaseOperation.java:163)
Caused: io.fabric8.kubernetes.client.KubernetesClientException: Operation: [list] for kind: [Secret] with name: [null] in namespace: [null] failed.
at io.fabric8.kubernetes.client.KubernetesClientException.launderThrowable(KubernetesClientException.java:64)
at io.fabric8.kubernetes.client.KubernetesClientException.launderThrowable(KubernetesClientException.java:72)
at io.fabric8.kubernetes.client.dsl.base.BaseOperation.listRequestHelper(BaseOperation.java:170)
at io.fabric8.kubernetes.client.dsl.base.BaseOperation.list(BaseOperation.java:672)
at io.fabric8.kubernetes.client.dsl.base.BaseOperation.list(BaseOperation.java:86)
at com.cloudbees.jenkins.plugins.kubernetes_credentials_provider.KubernetesCredentialProvider.startWatchingForSecrets(KubernetesCredentialProvider.java:116)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at hudson.init.TaskMethodFinder.invoke(TaskMethodFinder.java:104)
at hudson.init.TaskMethodFinder$TaskImpl.run(TaskMethodFinder.java:180)
at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:296)
at jenkins.model.Jenkins$5.runTask(Jenkins.java:1158)
at org.jvnet.hudson.reactor.Reactor$2.run(Reactor.java:214)
at org.jvnet.hudson.reactor.Reactor$Node.run(Reactor.java:117)
at jenkins.security.ImpersonatingExecutorService$1.run(ImpersonatingExecutorService.java:68)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)"

I inherited the whole setup, so, unfortunately, I do not know the details of it. There are two types of Kubernetes-credentials configured in our Jenkins-installation, “Kubeconfig” and “Secret File”. By aligning the “Kubeconfig” credentials with the secrets we found on the Kubernetes server, we were able to obtain a situation, where the builds can contact Kubernetes and complete successfully.

However, we still see these messages on the “Manage Jenkins” page. They disappear after a Jenkins restart and after that, they immedeately start reappearing and the number of messages grows with one, every five minutes.

I already tried to set the log level to “all”, but I do not get any hints about which credential it is, Jenkins is having problems with.

Any help is highly appreciated.

That’s where I would start. I believe it’s trying to talk to the kubernetes API server. It’s been a while though

Hi Gavin,

Thanks for your message. Not sure what you mean, though. Are you saying that Jenkins should not try to access the Kubernetes API server?

In the meanwhile, we temporarily disabled all Kubernetes-related pipelines. But the error persisits.

I am also puzzled about this part of the exception message:

“Caused: io.fabric8.kubernetes.client.KubernetesClientException: Operation: [list] for kind: [Secret] with name: [null] in namespace: [null] failed.”

Best regards

Thomas