Ansible json test

ansible_json_test.yml

---
# vim: set ft=ansible ts=2 sw=2 et:
 
- hosts:  localhost
  gather_facts: no
  connection: local
  become: no

  vars:
    my_json: |
      {
        "ami_out": {
          "architecture": "x86_64",
          "block_device_mapping": {
              "/dev/sda1": {
                  "delete_on_termination": true,
                  "encrypted": false,
                  "size": 8,
                  "snapshot_id": "snap-0e24e63b741d17279",
                  "volume_type": "gp2"
              },
              "/dev/sdb": {
                  "virtual_name": "ephemeral0"
              },
              "/dev/sdc": {
                  "virtual_name": "ephemeral1"
              }
          }
        }
      }


  tasks:
    - name: Get block_device_mapping
      set_fact:
        blk_dev_map: "{{ (my_json | from_json).ami_out.block_device_mapping }}"

    - debug: 
        msg:
          - "Block Device Mapping"
          - "{{ blk_dev_map }}"
          - "First item of unordered dict"
          - "{{ blk_dev_map | first }}"
          - "Select only those objects that contain snpshot_id - by making it an ordered list first"
          - "{{ blk_dev_map.values() | selectattr('snapshot_id', 'defined')  | list }}"
          - "First"
          - "{{ blk_dev_map.values() | selectattr('snapshot_id', 'defined')  | first }}"
          - "Snapshot id"
          - "{{ (blk_dev_map.values() | selectattr('snapshot_id', 'defined') | first)['snapshot_id'] }}"