release failing using kubernetes-workflow

[rawlingsj]

latest release seems to fails but not sure why, docker.io is accessible from the node but we still get the error below, @iocanel can you see what am I missing?

here's the Jenkinsfile

http://jenkins.cd.origin.fabric8.io/job/fabric8io/job/kansible/branch/master/7/console

Caused by: java.net.ProtocolException: Expected HTTP 101 response but was '500 Internal Server Error'
    at com.squareup.okhttp.ws.WebSocketCall.createWebSocket(WebSocketCall.java:123)
    at com.squareup.okhttp.ws.WebSocketCall.access$000(WebSocketCall.java:40)
    at com.squareup.okhttp.ws.WebSocketCall$1.onResponse(WebSocketCall.java:98)
    at com.squareup.okhttp.Call$AsyncCall.execute(Call.java:177)
    at com.squareup.okhttp.internal.NamedRunnable.run(NamedRunnable.java:33)
    ... 3 more

full stacktrace..

[master] Running shell script
[Pipeline] } //withKubernetesPod
[Pipeline] Run build steps as a Kubernetes Pod : End
[Pipeline] } //node
[Pipeline] Allocate node : End
[Pipeline] End of Pipeline
io.fabric8.kubernetes.client.KubernetesClientException: An error has occurred.
    at io.fabric8.kubernetes.client.KubernetesClientException.launderThrowable(KubernetesClientException.java:53)
    at io.fabric8.kubernetes.client.dsl.internal.ExecWebSocketListener.waitUntilReady(ExecWebSocketListener.java:120)
    at io.fabric8.kubernetes.client.dsl.internal.PodOperationsImpl.exec(PodOperationsImpl.java:215)
    at io.fabric8.kubernetes.client.dsl.internal.PodOperationsImpl.exec(PodOperationsImpl.java:51)
    at io.fabric8.kubernetes.workflow.KubernetesFacade.exec(KubernetesFacade.java:203)
    at io.fabric8.kubernetes.workflow.PodExecDecorator$1.launch(PodExecDecorator.java:58)
    at hudson.Launcher$ProcStarter.start(Launcher.java:381)
    at org.jenkinsci.plugins.durabletask.BourneShellScript.launchWithCookie(BourneShellScript.java:106)
    at org.jenkinsci.plugins.durabletask.FileMonitoringTask.launch(FileMonitoringTask.java:57)
    at org.jenkinsci.plugins.workflow.steps.durable_task.DurableTaskStep$Execution.start(DurableTaskStep.java:98)
    at org.jenkinsci.plugins.workflow.cps.DSL.invokeMethod(DSL.java:136)
    at org.jenkinsci.plugins.workflow.cps.CpsScript.invokeMethod(CpsScript.java:112)
    at groovy.lang.GroovyObject$invokeMethod.call(Unknown Source)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:42)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108)
    at org.kohsuke.groovy.sandbox.impl.Checker$1.call(Checker.java:151)
    at org.kohsuke.groovy.sandbox.GroovyInterceptor.onMethodCall(GroovyInterceptor.java:21)
    at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.SandboxInterceptor.onMethodCall(SandboxInterceptor.java:75)
    at org.kohsuke.groovy.sandbox.impl.Checker$1.call(Checker.java:149)
    at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:146)
    at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:123)
    at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:123)
    at com.cloudbees.groovy.cps.sandbox.SandboxInvoker.methodCall(SandboxInvoker.java:15)
    at WorkflowScript.run(WorkflowScript:13)
    at io.fabric8.kubernetes.workflow.Kubernetes$Pod.inside(jar:file:/var/jenkins_home/plugins/kubernetes-steps/WEB-INF/lib/kubernetes-steps.jar!/io/fabric8/kubernetes/workflow/Kubernetes.groovy:123)
    at ___cps.transform___(Native Method)
    at com.cloudbees.groovy.cps.impl.ContinuationGroup.methodCall(ContinuationGroup.java:55)
    at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.dispatchOrArg(FunctionCallBlock.java:106)
    at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.fixArg(FunctionCallBlock.java:79)
    at sun.reflect.GeneratedMethodAccessor276.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.cloudbees.groovy.cps.impl.ContinuationPtr$ContinuationImpl.receive(ContinuationPtr.java:72)
    at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.dispatchOrArg(FunctionCallBlock.java:100)
    at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.fixArg(FunctionCallBlock.java:79)
    at sun.reflect.GeneratedMethodAccessor276.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.cloudbees.groovy.cps.impl.ContinuationPtr$ContinuationImpl.receive(ContinuationPtr.java:72)
    at com.cloudbees.groovy.cps.impl.ContinuationGroup.methodCall(ContinuationGroup.java:57)
    at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.dispatchOrArg(FunctionCallBlock.java:106)
    at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.fixArg(FunctionCallBlock.java:79)
    at sun.reflect.GeneratedMethodAccessor276.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.cloudbees.groovy.cps.impl.ContinuationPtr$ContinuationImpl.receive(ContinuationPtr.java:72)
    at com.cloudbees.groovy.cps.impl.ConstantBlock.eval(ConstantBlock.java:21)
    at com.cloudbees.groovy.cps.Next.step(Next.java:58)
    at com.cloudbees.groovy.cps.Continuable.run0(Continuable.java:154)
    at org.jenkinsci.plugins.workflow.cps.SandboxContinuable.access$001(SandboxContinuable.java:19)
    at org.jenkinsci.plugins.workflow.cps.SandboxContinuable$1.call(SandboxContinuable.java:33)
    at org.jenkinsci.plugins.workflow.cps.SandboxContinuable$1.call(SandboxContinuable.java:30)
    at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.GroovySandbox.runInSandbox(GroovySandbox.java:106)
    at org.jenkinsci.plugins.workflow.cps.SandboxContinuable.run0(SandboxContinuable.java:30)
    at org.jenkinsci.plugins.workflow.cps.CpsThread.runNextChunk(CpsThread.java:164)
    at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.run(CpsThreadGroup.java:277)
    at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.access$000(CpsThreadGroup.java:77)
    at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:186)
    at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:184)
    at org.jenkinsci.plugins.workflow.cps.CpsVmExecutorService$2.call(CpsVmExecutorService.java:47)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at hudson.remoting.SingleLaneExecutorService$1.run(SingleLaneExecutorService.java:112)
    at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.net.ProtocolException: Expected HTTP 101 response but was '500 Internal Server Error'
    at com.squareup.okhttp.ws.WebSocketCall.createWebSocket(WebSocketCall.java:123)
    at com.squareup.okhttp.ws.WebSocketCall.access$000(WebSocketCall.java:40)
    at com.squareup.okhttp.ws.WebSocketCall$1.onResponse(WebSocketCall.java:98)
    at com.squareup.okhttp.Call$AsyncCall.execute(Call.java:177)
    at com.squareup.okhttp.internal.NamedRunnable.run(NamedRunnable.java:33)
    ... 3 more
Finished: FAILURE