问如果某些条件失败，则中止剩余任务的执行

EN

$ ansible-playbook playbook.yml -e "param1=value1 param2=value"

---
    - hosts: local
      user: roop
      gather_facts: no

      vars: {param1: "", param2: ""}

      tasks:

        #check whether param1 defined
        - name: 'Check for valid param1'
          shell: echo {{ param1 }}
          register: isValidParam1
          when: param1 !=""

        #check if param1 is null or invalid  
        - name: 'check if param1 is null or invalid' 
          debug: msg="Please enter correct param1"
          when: param1 == ""

        #check whether param2 defined
        - name: 'Check for valid param2'
          shell: echo {{ param2 }}
          register: isValidParam2
          when: param2 != ""

        #check if param2 is null or invalid  
        - name: 'check if param2 is null or invalid' 
          debug: msg="Please enter correct param2"
          when: param2 == ""  


        #check params is valid and defined
        - name: 'Check for valid params'
          shell: echo "param1={{ param1 }} param2={{ param2 }}
          register: validParams
          when: isValidParam1 is defined and isValidParam2 is defined

        #check if params are invalid then abort below all tasks.  
        - name: 'check if validParams is null or invalid' 
          debug: msg="Please enter correct Params"
          when: validParams is not defined    


         # based on validParams, and different value of param1 more than 
          10 task executing.