hadoop-job-tracker.yml

---
- hosts: tag_Name_hadoop_job_tracker
  become: true

  vars_prompt:
    - name: namenode
      prompt: "Enter name node IP address"
      private: no

  tasks:   
  - name: "Configuring Hadoop mapred-site.xml"
    blockinfile:
      path: /etc/hadoop/mapred-site.xml
      insertafter: "<configuration>"
      block:
        "<property>\n
        <name>mapred.job.tracker</name>
        <value>0.0.0.0:9002</value>
        </property>"
    register: res1

  - name: "Configuring Hadoop core-site.xml"
    blockinfile:
      path: "/etc/hadoop/core-site.xml"
      insertafter: "<configuration>"
      block: 
        "<property>\n
         <name>fs.default.name</name>\n
         <value>hdfs://{{ namenode }}:9001</value>\n
         </property>"
    register: res2

  - name: "Starting job tracker"
    shell: hadoop-daemon.sh start jobtracker
    when: res1['changed'] == true or res1['changed'] == true

  - name: "Printing the private IPv4"
    debug:
      var: ansible_facts['all_ipv4_addresses']