Warning: JnlpProtocol3 is disabled by default, use JNLP_PROTOCOL_OPTS to alter the behavior
Aug 16, 2018 9:43:28 AM hudson.remoting.jnlp.Main createEngine
INFO: Setting up agent: jenkins-slave-kp9w7-080vf
Aug 16, 2018 9:43:28 AM hudson.remoting.jnlp.Main$CuiListener <init>
INFO: Jenkins agent is running in headless mode.
Aug 16, 2018 9:43:28 AM hudson.remoting.Engine startEngine
INFO: Using Remoting version: 3.19
Aug 16, 2018 9:43:28 AM hudson.remoting.Engine startEngine
WARNING: No Working Directory. Using the legacy JAR Cache location: /home/jenkins/.jenkins/cache/jars
Aug 16, 2018 9:43:28 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Locating server among http://192.168.0.2:8080/
Aug 16, 2018 9:43:28 AM org.jenkinsci.remoting.engine.JnlpAgentEndpointResolver resolve
INFO: Remoting server accepts the following protocols: [JNLP4-connect, Ping]
Aug 16, 2018 9:43:28 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Agent discovery successful
Agent address: 192.168.0.2
Agent port: 50000
Identity: 98:9a:10:d2:0b:01:f0:4a:34:5b:f2:cb:bf:03:49:41
Aug 16, 2018 9:43:28 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Handshaking
Aug 16, 2018 9:43:28 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Connecting to 192.168.0.2:50000
Aug 16, 2018 9:43:28 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Trying protocol: JNLP4-connect
Aug 16, 2018 9:43:29 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Remote identity confirmed: 98:9a:10:d2:0b:01:f0:4a:34:5b:f2:cb:bf:03:49:41
Aug 16, 2018 9:43:30 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Connected
logs ? https://github.com/jenkinsci/kubernetes-plugin#debugging