Further tried by adding below entries in */etc/hosts* file on both *Jenkins/K8s Master* and* K8s-Worker* node system as well. But still result is same.
# cat /etc/hosts 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 75.76.77.5 jenkins-server jenkins-server.company.domain.com 75.76.77.6 k8s-node-1 k8s-node-1.company.domain.com *Excuted below on K8s-Worker node.* # curl -I http://jenkins-server/jenkins/tcpSlaveAgentListener/ HTTP/1.1 200 Server: nginx/1.14.1 Date: Fri, 28 Aug 2020 06:13:34 GMT Content-Type: text/plain;charset=UTF-8 Connection: keep-alive Cache-Control: private Expires: Thu, 01 Jan 1970 00:00:00 GMT X-Content-Type-Options: nosniff X-Hudson-JNLP-Port: 40021 X-Jenkins-JNLP-Port: 40021 X-Instance-Identity: MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAnkgz8Av2x8R9R2KZDzWm1K11O01r7VDikW48rCNQlgw /pUeNSPJu9pv7kH884tOE65GkMepNdtJcOFQFtY1qZ0sr5y4GF5TOc7+U/ TqfwULt60r7OQlKcrsQx/jJkF0xLjR+xaJ64WKnbsl0AiZhd8/ ynk02UxFXKcgwkEP2PGpGyQ1ps5t/ yj6ueFiPAHX2ssK8aI7ynVbf3YyVrtFOlqhnTy11mJFoLAZnpjYRCJsrX5z/ xciVq5c2XmEikLzMpjFl0YBAsDo7JL4eBUwiBr64HPcSKrsBBB9oPE4oI6GkYUCAni8uOLfzoNr9B1eImaETYSdVPdSKW /ez/OeHjQIDAQAB X-Jenkins-Agent-Protocols: JNLP4-connect, Ping X-Remoting-Minimum-Version: 3.14 # curl http://jenkins-server:40021/ Jenkins-Agent-Protocols: JNLP4-connect, Ping Jenkins-Version: 2.235.3 Jenkins-Session: 4455fd45 Client: 75.76.77.6 Server: 75.76.77.5 Remoting-Minimum-Version: 3.14 On Friday, August 28, 2020 at 10:16:45 AM UTC+5:30, Mk wrote: > > Dear Team, > > I have *Jenkins Master* &* K8s-Master* running on same server(*CentOS-8*), > Configured Jenkins *Kubernetes Plugin version - 1.26.4* But while running > pipeline job i always getting an error, Below is K8s cluster jenkins agent > pod log. > > [root@K8s-Master /]# kubectl logs -f pipeline-test-33-sj6tl-r0clh-g559d -c > jnlp > > Aug 08, 2020 8:37:21 AM hudson.remoting.jnlp.Main createEngine > INFO: Setting up agent: pipeline-test-33-sj6tl-r0clh-g559d > Aug 08, 2020 8:37:21 AM hudson.remoting.jnlp.Main$CuiListener <init> > INFO: Jenkins agent is running in headless mode. > Aug 08, 2020 8:37:21 AM hudson.remoting.Engine startEngine > INFO: Using Remoting version: 4.3 > Aug 08, 2020 8:37:21 AM org.jenkinsci.remoting.engine.WorkDirManager > initializeWorkDir > INFO: Using /home/jenkins/agent/remoting as a remoting work directory > Aug 08, 2020 8:37:21 AM org.jenkinsci.remoting.engine.WorkDirManager > setupLogging > INFO: Both error and output logs will be printed to > /home/jenkins/agent/remoting > Aug 08, 2020 8:37:21 AM hudson.remoting.jnlp.Main$CuiListener status > INFO: Locating server among [http://jenkins-serverjenkins/] > Aug 08, 2020 8:37:41 AM hudson.remoting.jnlp.Main$CuiListener error > > SEVERE: Failed to connect to > http://jenkins-server/jenkins/tcpSlaveAgentListener/: jenkins-server > java.io.IOException: Failed to connect to > http://jenkins-serverjenkins/tcpSlaveAgentListener/: jenkins-server > at > org.jenkinsci.remoting.engine.JnlpAgentEndpointResolver.resolve(JnlpAgentEndpointResolver.java:217) > at hudson.remoting.Engine.innerRun(Engine.java:693) > at hudson.remoting.Engine.run(Engine.java:518) > Caused by: java.net.UnknownHostException: jenkins-server > at > java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184) > at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) > at java.net.Socket.connect(Socket.java:607) > at sun.net.NetworkClient.doConnect(NetworkClient.java:175) > at sun.net.www.http.HttpClient.openServer(HttpClient.java:463) > at sun.net.www.http.HttpClient.openServer(HttpClient.java:558) > at sun.net.www.http.HttpClient.<init>(HttpClient.java:242) > at sun.net.www.http.HttpClient.New(HttpClient.java:339) > at sun.net.www.http.HttpClient.New(HttpClient.java:357) > at > sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1226) > at > sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1162) > at > sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1056) > at > sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:990) > at > org.jenkinsci.remoting.engine.JnlpAgentEndpointResolver.resolve(JnlpAgentEndpointResolver.java:214) > > > ... 2 more > > > Below settings configuration already enabled glocal security section. > > Manage Jenkins --> Configure Global Security --> Agents Random [Enabled] > > > > [image: 1.png] > > > > > I am successfully able to communicate from my Jenkins to the K8s master > cluster(Verified in Jenkins Cloud section). > > Even in K8s master server all the namespace pods are running. *Flannel > CNI installed*, Not sure what is causing problem with agent provisioning > through Jenkins. > > Would appreciate any suggestions. > -- You received this message because you are subscribed to the Google Groups "Jenkins Users" group. 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