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1. Test preparation(Duration: 2 mins)
   

   Demo Diagram

   

   Before the experiment, you can check the return information of the host service by calling the default (unmodified) host service with the following command: 
   Execute it under current user directory: 
   cat check.sh
   (View the service call command)
   The output is as follows: 
   curl -XPOST -H "Content-Type:application/json" http://zsystem.lab.csc:3000x/zosConnect/services/Region?action=invoke
./check.sh
   (Execute the script call service)
   You will see the following return information:
   {"TESTCOMM":{"DATAFLD":"HELLO FROM LAB"}}

2. Log into Gitlab to create a new branch(Duration: 5 mins)
   

   Click Sign in in the browser, and accesshttps://zansible.lab.csc:7443 via Git Account test00x/password. If login is successful, you will see the Gitlab project named "test00x". 
   As shown in the following figure, Note: test001 is used as an example in the figure, and the current actual project name is test00x
   
   
   Enter the project and you can see that the project has two branches: master and base. Click New branch as shown below, and
   
   create a new branch as shown below.
   In Branch Name, enter CTBR0x , and create from base as the source for the new branch, and then click Create branch to create a branch.
   

3. Check the COBOL application code(Duration: 5 mins)
   

   Click on the COBOL app that we are about to modify TESTA.cbl , and COMPILE is a compilation task.
   

   Click Edit to modify  TESTA.cbl. Note: Check it to make sure that it was modified under branch CTBR0x.
   
   We customize the HELLO Message field, ’HELLO FROM LAB‘, for instance, 'HELLO FROM CSC' .
   Note: The total length of the string here is no more than 20 characters, and the extra long part will be truncated.
   After modification, click Commit changes to submit the change.

4. Log into Ansible AWX to view the information of playbook(Duration: 5 mins)
   

   Enter the following address in the browser to access Ansible AWX: http://zansible.lab.csc
   and the account number is  test00x/password. Click Login to access the home page of AWX.
   Any modification to your new branch "CTBR0x" will automatically trigger the execution of template playbook_CTBR0x in Ansible AWX. You can click on Tasks on the top to view the historical execution tasks of the playbook in the lower right part of the AWX homepage, which was automatically triggered after you just submitted the modification for TESTA.cbl.
   Click playbook_CTBR0x on the top to view the Log information of the specific execution of playbook.

   

   After browsing the Log information on the right, you will know that the main functions of the playbook are as follows:
   

   • ssh to Host System
   • Create a temporary directory under z/osuss for storing project code pulled from gitlab
   • Clone code from gitlab to replace source file directory and destination load module directory in a COMPILE task
   • Create z/os dataset to store TESTA program and COMPILE task
   • Copy the TESTA program and COMPILE task under z/osuss into the z/os dataset already built in the previous step
   • Submit the COMPILE task to compile and generate load module
   • Delete the temporary directory under z/osuss
   • Call zowe cics plugin on localhost to deploy a new version of the TESTA program to the corresponding CICS region

   --------The following are for reference--------
   Attached below is an ansible script with playbook_CTBR0x.yml as an example, and you will better understand the entire automated deployment process with the help of the script and the execution Log:

   Click here to download it

5. Test the result of code modification(Duration: 1 min)
   

   You can review the return information of the host service by calling the host service again with the following command: 
   ./check.sh
   You will see the following return information: 
   {"TESTCOMM":{"DATAFLD":"您更改的消息信息"}}
   For instance: 
   {"TESTCOMM":{"DATAFLD":"HELLO FROM CSC"}}
   Congratulations! You have completed this experiment! If you want to modify the code again, you can repeat steps (3) to (5).

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