Red Hat Ansible for Network Automation

Create a variables file defining the variables that will be used.

1. Create a vars file named vars/adjustment-data.yml that defines two variables: new_layer3_data and new_interface_data. The new_layer3_data variable should be used in your playbook to configure interface layer 3 addresses. The new_interface_data variable should be used in your playbook to configure interface descriptions. See the Adjustment Phase Interface Descriptions and Adjustment Phase Layer 3 Addressing tables for interface descriptions and layer 3 addresses.

   Create the vars/ directory if it does not already exist.

   [student@workstation ansible-generic-project]$ mkdir -p vars

   Create the vars/adjustment-data.yml file.

   [student@workstation ansible-generic-project]$ cat \
   > vars/adjustment-data.yml
   new_layer3_data:
     spine01:
     - { name: eth3, ipv4: 172.16.50.1/30 }
     spine02:
     - { name: eth3, ipv4: 172.16.50.2/30 }
   new_interface_data:
     spine01:
       eth3:
         description: spine02-as19216
     spine02:
       eth3:
         description: spine01-as10101

Perform a play that implements layer three address and interface description changes.

1. Compose a playbook named adjustment.yml. It should consist of a play that targets only spine01 and spine02. The play should (1) make the new link interfaces passive with respect to OSPF, (2) apply interface descriptions to the new link interfaces, and (3) assign layer 3 addresses to the new link interfaces. The command that would be typed a the command line of a VyOS device to make an interface passive is "set protocols ospf passive-interface interface-name".

   [student@workstation ansible-generic-project]$ cat adjustment.yml
   ---
   - name: adjust the network layer 3 model
     hosts: spine01, spine02
     vars_files:
       - vars/adjustment-data.yml
   
     tasks:
   
       - name: make the new interfaces passive with respect to OSPF
         vyos_config:
         lines:
           - "set protocols ospf passive-interface 'eth3'"
         when: ansible_network_os == 'vyos'
   
       - name: configure interface descriptions
         vyos_interface:
           name: "{{ item.key }}"
           description: "{{ item.value.description }}"
         with_dict: "{{ new_interface_data[inventory_hostname] }}"
         when: ansible_network_os == 'vyos'
   
       - name: configure layer 3
         vyos_l3_interface:
           aggregate: "{{ new_layer3_data[inventory_hostname] }}"
         when: ansible_network_os == 'vyos'

2. Perform the play in adjustment.yml that implements the desired changes.

   [student@workstation ansible-generic-project]$ ansible-playbook adjustment.yml

Verify that the outcome is as desired. Execute an ad hoc command to verify that interface descriptions and layer 3 addresses are correct for the new link interfaces on spine01 and spine02.

[student@workstation ansible-generic-project]$ ansible -m vyos_command \
> -a "commands='sh int|grep eth3'" spines
spine01 | SUCCESS => {
    "changed": false,
    "stdout": [
        "eth3             172.16.50.1/30                    u/u  spine02-as19216"
    ],
    "stdout_lines": [
        [
            "eth3             172.16.50.1/30                    u/u  spine02-as19216"
        ]
    ]
}
spine02 | SUCCESS => {
    "changed": false,
    "stdout": [
        "eth3             172.16.50.2/30                    u/u  spine01-as10101"
    ],
    "stdout_lines": [
        [
            "eth3             172.16.50.2/30                    u/u  spine01-as10101"
        ]
    ]
}