Mastering Python Networking

Group and host variables

Notice in the previous playbook, we have repeated ourselves in the username and password variables for the two devices under the nexus_devices variable:

    vars:      nexus_devices: {        "nx-osv-1": {          "hostname": "nx-osv-1",          "username": "cisco",          "password": "cisco",          "vlans": [100, 200, 300],        <skip>        "nx-osv-2": {          "hostname": "nx-osv-2",          "username": "cisco",          "password": "cisco",          "vlans": [100, 200, 300],        <skip>

This is not ideal. If we ever need to update the username and password values, we will need to remember to update at two locations. This increases the management burden as well as the chances of making mistakes if we ever forget to update all the locations. For best practice, Ansible suggests that we use group_vars and ...