ansible playbook to install hadoop

hadoop-install.yml

#Install hadoop on namenode and datanodes
- hosts: 
  - hadoop_namenode 
  - hadoop_datanode
  vars:
    - user_directory: "{{ ansible_facts['user_dir']}}"
  tasks:
  
  #copy java software
  - name: "Transfer JDK 8"
    copy:
      src: "jdk-8u171-linux-x64.rpm"
      dest: "{{ user_directory }}/"
    register: java_copy
 
  #install java software
  - name: "Install Java"
    package:
      name: "jdk-8u171-linux-x64.rpm"
      state: present
    register: java_install
    when: java_copy.failed == false
   
  #copy hadoop software
  - name: "Transfer Hadoop software"
    copy:
      src: "hadoop-1.2.1-1.x86_64.rpm"
      dest: "{{ user_directory }}/"
    register: hadoop_copy
    
  #install hadoop software
  - name: "Install Hadoop"
    shell: "rpm -i {{ user_directory }}/hadoop-1.2.1-1.x86_64.rpm --force"
    when: java_install.failed == false and hadoop_copy.failed == false