Red Hat Ansible for Network Automation

Reinitialize non-management resources on the VyOS devices. If you did not create a playbook named vyos-reinitialize-l3.yml in a previous guided exercise, download it from http://materials.example.com/playbooks/.

[student@workstation proj]$ ansible-playbook vyos-reinitialize-l3.yml

Create a variables file that defines the variables that are needed. Download the breakup-data.yml file into the vars/ directory. This file maps layer 3 address data to interfaces and also provides interface descriptions.

[student@workstation proj]$ cd vars
[student@workstation vars]$ wget \
> http://materials.example.com/full/vars/breakup-data.yml
[student@workstation vars]$ cd ..
[student@workstation proj]$

Perform a play that implements layer 3 address and interface description changes.

1. Write a play that implements layer 3 address and interface description changes. Create a file named breakup.yml with the following content:

   ---
   - name: break up the layer 3 network
     hosts: network
     vars_files:
       - vars/breakup-data.yml
   
     tasks:
   
     - name: remove the legacy layer3 data
       vyos_l3_interface:
         aggregate: "{{ remove_layer3_data[inventory_hostname] }}"
         state: absent
       when: ansible_network_os == 'vyos'
   
     - name: configure interface descriptions
       vyos_interface:
         name: "{{ item.key }}"
         description: "{{ item.value.description }}"
       with_dict: "{{ interface_data[inventory_hostname] }}"
       when: ansible_network_os == 'vyos'
   
     - name: configure layer 3
       vyos_l3_interface:
         aggregate: "{{ layer3_data[inventory_hostname] }}"
       when: ansible_network_os == 'vyos'
   
     - name: configure interface descriptions
       ios_interface:
         name: "{{ item.key }}"
         description: "{{ item.value.description }}"
       with_dict: "{{ interface_data[inventory_hostname] }}"
       when: ansible_network_os == 'ios'
   
     - name: configure layer 3
       ios_l3_interface:
         aggregate: "{{ layer3_data[inventory_hostname] }}"
       when: ansible_network_os == 'ios'

2. Perform the play found in the breakup.yml playbook. This provisions the networks at layer 3.

   [student@workstation proj]$ ansible-playbook breakup.yml

3. Execute ad hoc commands and verify that layer 3 addresses and interface descriptions are mapped to interfaces as described in the tables found at the start of this exercise. Here the syntax of the command is shown for use with the VyOS devices:

   [student@workstation proj]$ ansible -m vyos_command -a "commands='sh int'" vyos

   The following ad hoc command can be used to verify that layer 3 addresses are listed correctly for the IOS networking device cs01.

   [student@workstation proj]$ ansible -m ios_command \
   > -a "commands='sh ip int br'" cs01

Perform a play that implements OSPF configuration changes.

1. Copy the existing ospf-consolidation.yml file and modify it to create a new ospf-breakup.yml playbook.

   [student@workstation proj]$ cp ospf-consolidation.yml ospf-breakup.yml

   The only change is to use the breakupdata.yml variables file. After editing, the ospf-breakup.yml file should contain the following:

   ---
   - name: play that configures OSPF according to data and templates
     hosts: network
     vars:
       vyos_ospf_template: j2/vyos-ospf.j2
       ios_ospf_template: j2/ios-ospf.j2
   
     vars_files:
       - vars/breakup-data.yml
   
     tasks:
   
     - name: configure ospf on vyos
       vyos_config:
         src: "{{ vyos_ospf_template }}"
         save: True
       when: ansible_network_os == 'vyos'
   
     - name: configure ospf on ios
       ios_config:
         src: "{{ ios_ospf_template }}"
         save_when: changed
       when: ansible_network_os == 'ios'

2. Perform the play in the ospf-breakup.yml playbook.

   [student@workstation proj]$ ansible-playbook ospf-breakup.yml

3. Execute ad hoc commands to confirm that the desired routes are present.

   [student@workstation proj]$ ansible -m vyos_command \
   > -a "commands='sh ip ro'" vyos
   [student@workstation proj]$ ansible -m ios_command -a "commands='sh ip ro'" ios

Verify that the outcome is as desired. Perform the end-to-end reachability test using the e2e.yml playbook.

[student@workstation proj]$ ansible-playbook e2e.yml