v1

ansible.cfg

@@ -0,0 +1,4 @@
+[defaults]
+inventory = ./inventory
+roles_path = ./roles
+host_key_checking = False

inventory

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+[all]
+pvgapp1 ansible_host=192.168.11.121
+pvgapp2 ansible_host=192.168.11.122
+pvgapp3 ansible_host=192.168.11.123
+
+[staging]
+pvgapp1 ansible_host=192.168.11.121
+pvgapp2 ansible_host=192.168.11.122
+pvgapp3 ansible_host=192.168.11.123

main.yml

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+---
+- name: main task
+  hosts: staging
+  roles:
+    - role: hello_world

roles/hello_world/tasks/main.yml

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+---
+- name: show remote host
+  debug:
+    msg: "the remote server is {{ ansible_host }}"
+- name: show vars of this playbook
+  debug:
+    msg: "{{ greeting }}"

roles/hello_world/vars/main.yml

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+greeting: "hello ansible-playbook"