readme.md

Nice refence:

Below link is to youtube video, nice demo and explaination for JTE Nice JTE Demo

Jenkins Setup

• Use Jcasc
• Add plugings during startup
• Use jcasc.yaml to define setup
• Add secrets to secrets folder in correct directory structure in plain text files. (Need to move to read from Vault for future)
• Use separate *-plugins.txt to enable setup of plugins in layer

Plugins:

• kubernetes-cli:1.10.3

  • Generate Credentials:

      # Create a ServiceAccount named `jenkins-robot` in a given namespace.
      $ kubectl -n <namespace> create serviceaccount jenkins-robot
    
      # The next line gives `jenkins-robot` administator permissions for this namespace.
      # * You can make it an admin over all namespaces by creating a `ClusterRoleBinding` instead of a `RoleBinding`.
      # * You can also give it different permissions by binding it to a different `(Cluster)Role`.
      $ kubectl -n <namespace> create rolebinding jenkins-robot-binding --clusterrole=cluster-admin --serviceaccount=<namespace>:jenkins-robot
    
      # Get the name of the token that was automatically generated for the ServiceAccount `jenkins-robot`.
      $ kubectl -n <namespace> get serviceaccount jenkins-robot -o go-template --template='{{range .secrets}}{{.name}}{{"\n"}}{{end}}'
      jenkins-robot-token-d6d8z
    
      # Retrieve the token and decode it using base64.
      $ kubectl -n <namespace> get secrets jenkins-robot-token-d6d8z -o go-template --template '{{index .data "token"}}' | base64 -d
      eyJhbGciOiJSUzI1NiIsImtpZCI6IiJ9.eyJpc3MiOiJrdWJlcm5ldGVzL3NlcnZpY2V[...]
    

  • Usage example:

      node {
        stage('List pods') {
          withKubeConfig([credentialsId: '<credential-id>',
                          caCertificate: '<ca-certificate>',
                          serverUrl: '<api-server-address>',
                          contextName: '<context-name>',
                          clusterName: '<cluster-name>',
                          namespace: '<namespace>'
                          ]) {
            sh 'kubectl get pods'
          }
        }
      }
    

• jte

JTE template setup

• Plugin: templating-engine:latest

  templateGlobalConfig:
    tier:
      configurationProvider: "null"
      librarySources:
      - libraryProvider:
          scm:
            baseDir: "libraries"
            scm:
              git:
                branches:
                - name: "*/main"
                buildChooser: "default"
                userRemoteConfigs:
                - credentialsId: "github-ci-user"
                  url: "https://github.com/amitkshirsagar13/devops.git"
  
  

JTE Pipeline Sample-Service

sample-service with Scripted Pipeline

sample-service with Declarative Pipeline

https://devopscube.com/jenkins-build-agents-kubernetes/