18.9. Configuring a network bridge by using the network RHEL system role

Procedure

1. Create a playbook file, for example, ~/playbook.yml, with the following content:

   ---
   - name: Configure the network
     hosts: managed-node-01.example.com
     tasks:
       - name: Bridge connection profile with two Ethernet ports
         ansible.builtin.include_role:
           name: redhat.rhel_system_roles.network
         vars:
           network_connections:
             # Bridge profile
             - name: bridge0
               type: bridge
               interface_name: bridge0
               ip:
                 dhcp4: yes
                 auto6: yes
               state: up
   
             # Port profile for the 1st Ethernet device
             - name: bridge0-port1
               interface_name: enp7s0
               type: ethernet
               controller: bridge0
               port_type: bridge
               state: up
   
             # Port profile for the 2nd Ethernet device
             - name: bridge0-port2
               interface_name: enp8s0
               type: ethernet
               controller: bridge0
               port_type: bridge
               state: up

   The settings specified in the example playbook include the following:

   type: <profile_type>

   Sets the type of the profile to create. The example playbook creates three connection profiles: One for the bridge and two for the Ethernet devices.

   dhcp4: yes

   Enables automatic IPv4 address assignment from DHCP, PPP, or similar services.

   auto6: yes

   Enables IPv6 auto-configuration. By default, NetworkManager uses Router Advertisements. If the router announces the managed flag, NetworkManager requests an IPv6 address and prefix from a DHCPv6 server.

   For details about all variables used in the playbook, see the /usr/share/ansible/roles/rhel-system-roles.network/README.md file on the control node.

2. Validate the playbook syntax:

   $ ansible-playbook --syntax-check ~/playbook.yml

   Note that this command only validates the syntax and does not protect against a wrong but valid configuration.

3. Run the playbook:

   $ ansible-playbook ~/playbook.yml

Verification

1. Display the link status of Ethernet devices that are ports of a specific bridge:

   # ansible managed-node-01.example.com -m command -a 'ip link show master bridge0'
   managed-node-01.example.com | CHANGED | rc=0 >>
   3: enp7s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel master bridge0 state UP mode DEFAULT group default qlen 1000
       link/ether 52:54:00:62:61:0e brd ff:ff:ff:ff:ff:ff
   4: enp8s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel master bridge0 state UP mode DEFAULT group default qlen 1000
       link/ether 52:54:00:9e:f1:ce brd ff:ff:ff:ff:ff:ff

2. Display the status of Ethernet devices that are ports of any bridge device:

   # ansible managed-node-01.example.com -m command -a 'bridge link show'
   managed-node-01.example.com | CHANGED | rc=0 >>
   3: enp7s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master bridge0 state forwarding priority 32 cost 100
   4: enp8s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master bridge0 state listening priority 32 cost 100