Abort execution of remaining task if certain condition is failed

Question

I want to abort execution of remaining task if certain condition is failed. and display proper error message.

So instead of skipping remaining task I want to show error message and stop execution of ansible playbook.

Lets say I am running below command

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

My playbook look like this:-

playbook.yml:-

---     - 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. 

As I have mentioned in my last task comment. I am executing more than 10 task based on validParams and param1 different value. What I need here if validParams is undefined then abort all execution and show error messages.

Is there any efficient way to do this . Please suggest me.

Answer 1

You can use

• assert https://docs.ansible.com/ansible/latest/collections/ansible/builtin/assert_module.html
• or fail https://docs.ansible.com/ansible/latest/collections/ansible/builtin/fail_module.html

It will go along with something like this

        #check if params are invalid then abort below all tasks.           - name: 'check parm is null or invalid'            fail: msg="Please enter correct Params"           when: "param1 is not defined or param2 is not defined " ## whatever condition you want