Capture pod events just before deleting the agent

src/main/java/org/csanchez/jenkins/plugins/kubernetes/KubernetesEventsException.java

@@ -0,0 +1,25 @@
+package org.csanchez.jenkins.plugins.kubernetes;
+
+import io.fabric8.kubernetes.api.model.Event;
+
+import java.util.List;
+
+/**
+ * Prints
+ */
+public class KubernetesEventsException extends Exception {
+    public KubernetesEventsException(List<Event> events) {
+        super(toMessage(events));
+    }
+
+    private static String toMessage(List<Event> events) {
+        StringBuilder sb = new StringBuilder("Events follow:\n");
+        for (Event event : events) {
+            String[] lines = event.getMessage().split("\n");
+            for (String line : lines) {
+                sb.append(String.format("[%s][%s/%s][%s] %s%n", event.getType(), event.getInvolvedObject().getNamespace(), event.getInvolvedObject().getName(), event.getReason(), line));
+            }
+        }
+        return sb.toString();
+    }
+}

src/main/java/org/csanchez/jenkins/plugins/kubernetes/KubernetesLauncher.java

@@ -38,9 +38,11 @@
 import javax.annotation.CheckForNull;
 
 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
+import io.fabric8.kubernetes.api.model.Event;
 import io.fabric8.kubernetes.client.KubernetesClientException;
 import jenkins.metrics.api.Metrics;
 import org.apache.commons.lang.StringUtils;
+import org.jenkinsci.plugins.kubernetes.auth.KubernetesAuthException;
 import org.kohsuke.stapler.DataBoundConstructor;
 
 import com.google.common.base.Throwables;
@@ -255,6 +257,14 @@ else if (httpCode == 409 && e.getMessage().contains("Operation cannot be fulfill
             }
             Metrics.metricRegistry().counter(MetricNames.PODS_LAUNCHED).inc();
         } catch (Throwable ex) {
+            try {
+                List<Event> podEvents = ((KubernetesComputer) computer).getPodEvents();
+                if (!podEvents.isEmpty()) {
+                    ex.addSuppressed(new KubernetesEventsException(podEvents));
+                }
+            } catch (KubernetesAuthException | IOException e) {
+                LOGGER.log(Level.FINE, "Unable to add Kubernetes events");
+            }
             setProblem(ex);
             LOGGER.log(Level.WARNING, String.format("Error in provisioning; agent=%s, template=%s", node, template), ex);
             LOGGER.log(Level.FINER, "Removing Jenkins node: {0}", node.getNodeName());

src/test/java/org/csanchez/jenkins/plugins/kubernetes/pipeline/KubernetesPipelineTest.java

@@ -30,8 +30,10 @@
 import static org.csanchez.jenkins.plugins.kubernetes.KubernetesTestUtil.deletePods;
 import static org.csanchez.jenkins.plugins.kubernetes.KubernetesTestUtil.getLabels;
 import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.containsString;
 import static org.hamcrest.Matchers.emptyIterable;
 import static org.hamcrest.Matchers.hasEntry;
+import static org.hamcrest.Matchers.hasItem;
 import static org.hamcrest.Matchers.hasSize;
 import static org.hamcrest.Matchers.oneOf;
 import static org.junit.Assert.assertEquals;
@@ -675,6 +677,13 @@ public void invalidPodGetsCancelled() throws Exception {
         r.assertLogContains("ERROR: Queue task was cancelled", b);
     }
 
+    @Test
+    public void podEventsPrinted() throws Exception {
+        Thread.sleep(5000);
+        b.doKill();
+        assertThat(logs.getMessages(), hasItem(containsString("Readiness probe failed")));
+    }
+
     @Issue("SECURITY-1646")
     @Test
     public void substituteEnv() throws Exception {

src/test/resources/org/csanchez/jenkins/plugins/kubernetes/pipeline/podEventsPrinted.groovy

@@ -0,0 +1,18 @@
+podTemplate(slaveConnectTimeout:10, yaml:'''
+  spec:
+    containers:
+    - name: neverready
+      image: busybox
+      command: ['sleep', '99999999']
+      readinessProbe:
+        exec:
+          command:
+          - cat
+          - /tmp/healthy
+        initialDelaySeconds: 5
+        periodSeconds: 5
+''') {
+  node(POD_LABEL) {
+    sh 'true'
+  }
+}