Check if some rpm is installed

rpm_check.yml

#!/usr/bin/env ansible-playbook
---
- name: rpm_check
  hosts: test_vm
  tasks:
     - name: copy the_silver_searcher rpm
       copy: src=/opt/the_silver_searcher-0.33.0-1.el7.x86_64.rpm dest=/opt/the_silver_searcher-0.33.0-1.el7.x86_64.rpm

     - name: Check if ag.rpm is installed
       command: rpm -q the_silver_searcher
       register: rpm_check
       failed_when: rpm_check.rc > 1
       changed_when: no
     - debug: var=rpm_check

     - name: install ag.rpm (the_silver_searcher)  
       raw: yum install -y /opt/the_silver_searcher-0.33.0-1.el7.x86_64.rpm 
       register: out
       when: rpm_check.rc != 0
     - debug: var=out.stdout_lines

Suppose the error code of a command is meaningless and to tell if there is a failure what really matters is the output of the command, for instance if the string “FAILED” is in the output.