build_snake.yml

- hosts: dut
  connection: local
  gather_facts: no
  vars:
    state: present
    snake_tag: snake
    max_vnf: 255
  roles:
    - ansible-nfvis
  tags:
    - facts
  tasks:
  - name: Get NFVIS facts
    nfvis_facts:
      host: "{{ ansible_host }}"
      user: "{{ ansible_user }}"
      password: "{{ ansible_password }}"
    register: nfvis_facts

  - set_fact:
      total_vcpus_available: "{{ nfvis_facts['cpu-info']['total-logical-cpus'] - total_vcpus_used | int }}"
    vars:
      total_vcpus_used: "{{ nfvis_facts['cpu-info']['logical-cpus-used-by-system'] + nfvis_facts['cpu-info']['logical-cpus-used-by-vnfs'] | int }}"

#  - debug:
#      var: nfvis_facts

  - set_fact:
      num_snakes: "{{ total_vcpus_available|int if total_vcpus_available|int < max_vnf|int else  max_vnf|int }}"

  - debug:
      msg: "{{ total_vcpus_available }} VCPUs available. Building {{ num_snakes }} VNF snake test"

  - name: Add VNF to inventory
    add_host:
      name: "{{ snake_tag }}{{ item }}"
      group: snake_test
      vnf_number: "{{ item }}"
      vnf_total: "{{ num_snakes }}"
    with_sequence: start=1 end="{{ num_snakes }}"

- hosts: snake_test
  connection: local
  gather_facts: no
  roles:
    - ansible-nfvis
  vars:
    snake_tag: snake
    mgmt_bridge: 'wan-br'
    test_wan_net: test-wan
    test_lan_net: test-lan
    wan_net: test-wan
    lan_net: test-lan
    lan_cidr_block: 192.168.0.0/16
    dest_lan_cidr: "{{ lan_cidr_block | ipsubnet(24, 255) }}"
    lan_cidr: "{{ lan_cidr_block | ipsubnet(24, 255) }}"
    vnf_image: isrv_16.09.01a_noll
    vnf_flavor: isrv-small
    vnf_template: ios/cli.j2
    state: present
  tasks:
    - name: Calculate wan-net
      set_fact:
        wan_net: "{{ snake_tag }}-net{{ vnf_number|int - 1 }}"
      when: vnf_number|int > 1

    - name: Calculate lan-net
      set_fact:
        lan_net: "{{ snake_tag }}-net{{ vnf_number }}"
        lan_cidr: "{{ lan_cidr_block | ipsubnet(24, vnf_number) }}"
      when: vnf_number != vnf_total

    - name: Calculate network addresses
      set_fact:
        lan_ip: "{{ lan_cidr | ipaddr(1) }}"
        lan_route: "{{ lan_cidr | ipaddr(2) }}"
        wan_cidr: "{{ lan_cidr_block | ipsubnet(24, vnf_number|int - 1) }}"
        wan_ip: "{{ lan_cidr_block | ipsubnet(24, vnf_number|int - 1) | ipaddr(2) }}"
        wan_gateway: "{{ lan_cidr_block | ipsubnet(24, vnf_number|int - 1) | ipaddr(1) }}"

#    - debug:
#        msg: "{{ vnf_number }}/{{ vnf_total }} vnf: {{ inventory_hostname }}, wan_net: {{ wan_net }}, lan_net: {{ lan_net }}, lan_cidr: {{ lan_cidr }}"

    - name: Build snake bridges
      nfvis_bridge:
        host: "{{ hostvars['dut'].ansible_host }}"
        user: "{{ ansible_user }}"
        password: "{{ ansible_password }}"
        name: "{{ lan_net }}_br"
        state: "{{ state }}"
      register: results
      when: lan_net != test_lan_net

    - name: Build snake networks
      nfvis_network:
        host: "{{ hostvars['dut'].ansible_host }}"
        user: "{{ ansible_user }}"
        password: "{{ ansible_password }}"
        name: "{{ lan_net }}"
        bridge: "{{ lan_net }}_br"
        state: "{{ state }}"
      register: results
      when: lan_net != test_lan_net

    - set_fact:
        interfaces:
          GigabitEthernet2:
            enabled: true
            ip:
              primary: "{{ wan_ip }}"
              gateway: "{{ wan_gateway | ipaddr('address') }}"

          GigabitEthernet3:
            enabled: true
            ip:
              primary: "{{ lan_ip }}"
        router:
          ospf:
            id: 1
            router_id: "{{ wan_ip }}"
            default_information_originate: true
            networks:
              - network: "{{ wan_cidr }}"
                area: 0
              - network: "{{ lan_cidr }}"
                area: 0

#    - set_fact:
#        static_routes:
#          global:
#            - network: "{{ dest_lan_cidr }}"
#              fwd_list:
#                - fwd: "{{ lan_route }}"
#      when: vnf_number < vnf_total
#
#    - debug:
#        var: static_routes
#      when: vnf_number < vnf_total

#    - copy:
#        content: "{{ lookup('template', 'ios/cli.j2') }}"
#        dest: "{{ snake_tag }}-{{ vnf_number }}.cfg"

    - name: Build snake VNFs
      nfvis_deployment:
        host: "{{ hostvars['dut'].ansible_host }}"
        user: "{{ ansible_user }}"
        password: "{{ ansible_password }}"
        name: "{{ snake_tag }}-{{ vnf_number }}"
        timeout: 60
        state: "{{ state }}"
        image: "{{ vnf_image }}"
        flavor: "{{ vnf_flavor }}"
        interfaces:
          - network: int-mgmt-net
          - network: "{{ wan_net }}"
          - network: "{{ lan_net }}"
        bootup_time: 600
        port_forwarding:
          - proxy_port: "{{ 21000 + vnf_number|int }}"
            source_bridge: "{{ mgmt_bridge }}"
        config_data:
          - dst: iosxe_config.txt
            data: "{{ lookup('template', 'ios/nfvis.j2') }}"
      register: deployment_results
      until: "'OK' in deployment_results.response"
      retries: 6
      delay: 10