zdevops

Main features

  • Secure and modern connection of Jenkins to the mainframes through the use of zOSMF REST API
  • The functionality is based on the Kotlin SDK methods, such as JCL jobs submission, download, allocate, write to the dataset, etc., with a log collected upon finish
  • Multiple connections to various mainframes - z/OS Connections List where you can save all the necessary systems and credentials, all data are safely stored under the protection of Jenkins Credentials manager
  • Agent-less solution
  • Fast execution and functional extensibility

Installing a plugin by .hpi executable file

The plugins are packaged as self-contained .hpi files, which have all the necessary code, images, and other resources which the plugin needs to operate successfully.

z/OS DevOps plugin installation .hpi file

Assuming a .hpi file has been downloaded, a logged-in Jenkins administrator may upload the file from within the web UI:

  1. Navigate to the Manage Jenkins > Manage Plugins page in the web UI.
  2. Click on the Advanced tab.
  3. Choose the .hpi file from your system or enter a URL to the archive file under the Deploy Plugin section.
  4. Deploy the plugin file.

Manual Jenkins plugin installation (Installation via source code build and .hpi file upload)

  1. Download the Jenkins zOS DevOps plugin source code from its official GitHub repository
  2. It is necessary to build the project with the help of the Gradle Build Tool
  3. Next, you need to generate an installation file: .hpi or .jpi file (both are installation files for the Jenkins plugin). This can be done by executing “gradle jpi” command. Or for example: Gradle -> build -> jpi
  4. After building the .hpi/.jpi file, it should appear in a /build/libs/<hpi_file_name>.hpi directory
  5. Next you need to login into the Jenkins, move to the “Manage Jenkins” -> “Manage Plugins” -> “Advanced (tab)” -> “Deploy Plugin” (You can select a plugin file from your local system or provide a URL to install a plugin from outside the central plugin repository) -> Specify the path to the generated .hpi/.jpi file (or by dragging the file from Intellij IDEA project to the file upload field in the Jenkins).
  6. Click “Deploy”, reboot Jenkins after installation. The Plugin is ready to go!

Plugin configuration

After successfully installing the plugin, you need to configure it for further work - this will require a minimum of actions.

  1. Move to “Manage Jenkins” -> “Configure System” -> scroll down and find the panel with the name - “z/OS Connection List”
  2. This setting allows you to add all necessary z/OS systems and configure access to them. It is necessary to set the connection name (it is also the ID for the call in the code). For the example: z/os-connection-name
  3. The URL address and port of the required mainframe to connect via z/OSMF. Example: https://<ip-addres>:<port number>
  4. Add credentials (Mainframe User ID + Password) under which you can connect to the system.

You can save as many connections as you like, the system will keep the corresponding user IDs/passwords.

Use case

  • Add a zosmf connection in settings (Manage Jenkins -> Configure System -> z/OS Connection List). Enter a connection name, zosmf url, username and password.
  • Create a new item -> Pipeline and open its configuration. Create a zosmf section inside the steps of the stage and pass the connection name as a parameter of the section. Inside the zosmf body invoke necessary zosmf functions (they will be automatically done in a specified connection context). Take a look at the example below:
stage ("stage-name") {
    steps {
        // ...
        zosmf("z/os-connection-name") {
            submitJob "//'EXAMPLE.DATASET(JCLJOB)'"
            submitJobSync "//'EXAMPLE.DATASET(JCLJOB)'"
            downloadDS "USER.LIB(MEMBER)"
            downloadDS dsn:"USER.LIB(MEMBER)", vol:"VOL001"
            allocateDS dsn:"STV.TEST5", alcUnit:"TRK", dsOrg:"PS", primary:1, secondary:1, recFm:"FB"
            writeFileToDS dsn:"USER.DATASET", file:"workspaceFile"
            writeFileToDS dsn:"USER.DATASET", file:"D:\\files\\localFile"
            writeToDS dsn:"USER.DATASET", text:"Write this string to dataset"
            writeFileToMember dsn:"USER.DATASET", member:"MEMBER", file:"workspaceFile"
            writeFileToMember dsn:"USER.DATASET", member:"MEMBER", file:"D:\\files\\localFile"
            writeToMember dsn:"USER.DATASET", member:"MEMBER", text:"Write this string to member"
        }
        // ...
    }
}

How to run in Debug:

  • ./gradlew server --debug-jvm
  • wait until Attach debugger appears in console
  • click it
  • wait until Jenkins is deployed
  • open localhost:8080
  • enjoy