Add a new key-value to a json file using Ansible

Question

I\'m using Ansible to automate some configuration steps for my application VM, but having difficult to insert a new key-value to an existing json file on the remote host.

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Answer 1

 - name: update log
    copy:
      content: "{{ log | to_nice_json}}"
      dest: "{{ log_file }}"
    vars:
      log: "{{ (lookup('file', log_file) | from_json) + ([{'job': (build_id if build_id != '' else 'dev'), 'keystore': ks, 'timestamp': ansible_date_time.iso8601}]) }}"
      log_file: log/log.json
      build_id: "{{ lookup('ENV', 'BUILD_ID') }}"
    tags: log