Failed to start Kubernetes cloud plugin with IBM 8-jre

[liqlin2015]

When I try to switch from openjdk:8-jre to ibmjava:8-jre, the Kubernetes cloud plugin failed to be started with following error,

[2017-03-30 05:58:02,353][WARN ][io.fabric8.elasticsearch.discovery.kubernetes.KubernetesUnicastHostsProvider] [Meggan] Exception caught during discovery: An error has occurred.
io.fabric8.kubernetes.client.KubernetesClientException: An error has occurred.
	at io.fabric8.kubernetes.client.KubernetesClientException.launderThrowable(KubernetesClientException.java:57)
	at io.fabric8.kubernetes.client.dsl.base.BaseOperation.get(BaseOperation.java:125)
	at io.fabric8.elasticsearch.cloud.kubernetes.KubernetesAPIServiceImpl.endpoints(KubernetesAPIServiceImpl.java:35)
	at io.fabric8.elasticsearch.discovery.kubernetes.KubernetesUnicastHostsProvider.readNodes(KubernetesUnicastHostsProvider.java:112)
	at io.fabric8.elasticsearch.discovery.kubernetes.KubernetesUnicastHostsProvider.lambda$buildDynamicNodes$0(KubernetesUnicastHostsProvider.java:80)
	at io.fabric8.elasticsearch.discovery.kubernetes.KubernetesUnicastHostsProvider$$Lambda$1.00000000DC07A210.run(Unknown Source)
	at java.security.AccessController.doPrivileged(AccessController.java:594)
	at io.fabric8.elasticsearch.discovery.kubernetes.KubernetesUnicastHostsProvider.buildDynamicNodes(KubernetesUnicastHostsProvider.java:79)
	at org.elasticsearch.discovery.zen.ping.unicast.UnicastZenPing.sendPings(UnicastZenPing.java:335)
	at org.elasticsearch.discovery.zen.ping.unicast.UnicastZenPing.ping(UnicastZenPing.java:240)
	at org.elasticsearch.discovery.zen.ping.ZenPingService.ping(ZenPingService.java:106)
	at org.elasticsearch.discovery.zen.ping.ZenPingService.pingAndWait(ZenPingService.java:84)
	at org.elasticsearch.discovery.zen.ZenDiscovery.findMaster(ZenDiscovery.java:945)
	at org.elasticsearch.discovery.zen.ZenDiscovery.innerJoinCluster(ZenDiscovery.java:360)
	at org.elasticsearch.discovery.zen.ZenDiscovery.access$4400(ZenDiscovery.java:96)
	at org.elasticsearch.discovery.zen.ZenDiscovery$JoinThreadControl$1.run(ZenDiscovery.java:1296)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1153)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.lang.Thread.run(Thread.java:785)
Caused by: javax.net.ssl.SSLException: Received fatal alert: protocol_version
	at com.ibm.jsse2.j.a(j.java:35)
	at com.ibm.jsse2.j.a(j.java:31)
	at com.ibm.jsse2.as.b(as.java:806)
	at com.ibm.jsse2.as.a(as.java:102)
	at com.ibm.jsse2.as.i(as.java:969)
	at com.ibm.jsse2.as.a(as.java:680)
	at com.ibm.jsse2.as.startHandshake(as.java:859)
	at com.squareup.okhttp.internal.io.RealConnection.connectTls(RealConnection.java:188)
	at com.squareup.okhttp.internal.io.RealConnection.connectSocket(RealConnection.java:145)
	at com.squareup.okhttp.internal.io.RealConnection.connect(RealConnection.java:108)
	at com.squareup.okhttp.internal.http.StreamAllocation.findConnection(StreamAllocation.java:184)
	at com.squareup.okhttp.internal.http.StreamAllocation.findHealthyConnection(StreamAllocation.java:126)
	at com.squareup.okhttp.internal.http.StreamAllocation.newStream(StreamAllocation.java:95)
	at com.squareup.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:281)
	at com.squareup.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:224)
	at com.squareup.okhttp.Call.getResponse(Call.java:286)
	at com.squareup.okhttp.Call$ApplicationInterceptorChain.proceed(Call.java:243)
	at io.fabric8.kubernetes.client.utils.HttpClientUtils$3.intercept(HttpClientUtils.java:110)
	at com.squareup.okhttp.Call$ApplicationInterceptorChain.proceed(Call.java:232)
	at com.squareup.okhttp.Call.getResponseWithInterceptorChain(Call.java:205)
	at com.squareup.okhttp.Call.execute(Call.java:80)
	at io.fabric8.kubernetes.client.dsl.base.OperationSupport.handleResponse(OperationSupport.java:210)
	at io.fabric8.kubernetes.client.dsl.base.OperationSupport.handleGet(OperationSupport.java:205)
	at io.fabric8.kubernetes.client.dsl.base.BaseOperation.handleGet(BaseOperation.java:510)
	at io.fabric8.kubernetes.client.dsl.base.BaseOperation.get(BaseOperation.java:118)
	... 17 more

Not sure the difference between openjdk:8-jre and ibmjava:8-jre.

[liqlin2015]

Does it support to use insecure connection between Kubernetes API server? Then we can bypass ssl authentication.

[jcantrill]

Consider #140