Add --noReconnectAfter 1d option when available in the agent image. (#1553)

Author: Vlatombe

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

@@ -73,6 +73,7 @@
 import java.util.regex.Pattern;
 import java.util.stream.Collectors;
 import jenkins.model.Jenkins;
+import jenkins.util.SystemProperties;
 import org.apache.commons.lang.StringUtils;
 import org.csanchez.jenkins.plugins.kubernetes.model.TemplateEnvVar;
 import org.csanchez.jenkins.plugins.kubernetes.pipeline.PodTemplateStepExecution;
@@ -100,6 +101,8 @@ public class PodTemplateBuilder {
     public static final Pattern FROM_DIRECTIVE = Pattern.compile("^FROM (.*)$");
 
     public static final String LABEL_KUBERNETES_CONTROLLER = "kubernetes.jenkins.io/controller";
+    static final String NO_RECONNECT_AFTER_TIMEOUT =
+            SystemProperties.getString(PodTemplateBuilder.class.getName() + ".noReconnectAfter", "1d");
 
     @SuppressFBWarnings(value = "MS_SHOULD_BE_FINAL", justification = "tests")
     @Restricted(NoExternalUse.class)
@@ -446,6 +449,7 @@ private Map<String, EnvVar> jnlpEnvVars(String workingDir) {
                 env.put("JENKINS_PROTOCOLS", "JNLP4-connect");
                 env.put("JENKINS_INSTANCE_IDENTITY", tcpSlaveAgentListener.getIdentityPublicKey());
             }
+            env.put("REMOTING_OPTS", "-noReconnectAfter " + NO_RECONNECT_AFTER_TIMEOUT);
         }
         Map<String, EnvVar> envVarsMap = new HashMap<>();
 

src/main/resources/org/csanchez/jenkins/plugins/kubernetes/Dockerfile

@@ -1 +1 @@
-FROM jenkins/inbound-agent:3206.vb_15dcf73f6a_9-2
+FROM jenkins/inbound-agent:3248.v65ecb_254c298-2

src/test/java/org/csanchez/jenkins/plugins/kubernetes/PodTemplateBuilderTest.java

@@ -480,6 +480,7 @@ private void validateJnlpContainer(Container jnlp, KubernetesSlave slave, boolea
             envVars.add(new EnvVar("JENKINS_NAME", AGENT_NAME, null));
             envVars.add(new EnvVar("JENKINS_AGENT_NAME", AGENT_NAME, null));
             envVars.add(new EnvVar("JENKINS_AGENT_WORKDIR", ContainerTemplate.DEFAULT_WORKING_DIR, null));
+            envVars.add(new EnvVar("REMOTING_OPTS", "-noReconnectAfter " + NO_RECONNECT_AFTER_TIMEOUT, null));
         } else {
             assertThat(jnlp.getArgs(), empty());
         }