Ansible playbook with multiple play

Playbook_multuple_play_ex.yaml

---

- hosts: mongodb_servers
  tasks:
  - name: Add APT key
    apt_key:
      keyserver: "hkp://keyserver.ubuntu.com:80"
      id: "0C49F3730359A14518585931BC711F9BA15703C6"

  - name: Add APT repository
    apt_repository:
      repo: deb [ arch=amd64,arm64 ] http://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.4 multiverse
      state: present
      filename: 'mongodb-org-3.4'

  - name: Update repo list and download mongodb package
    apt:
      name: mongodb-org
      update_cache: yes

  - name: Start the mongodb service
    service:
      name: mongod
      state: started
      
- hosts: web_servers
  vars:
    http_port: 80
  tasks:
  - name: ensure apache is at the latest version
    yum:
      name: httpd
      state: latest
  - name: write the apache config file
    template:
      src: /srv/httpd.j2
      dest: /etc/httpd.conf
...