18장. Configuring network settings by using RHEL system roles

Procedure

1. Edit the ~/inventory file, and append the host-specific settings to the host entries:

   managed-node-01.example.com interface=enp1s0 ip_v4=192.0.2.1/24 ip_v6=2001:db8:1::1/64 gateway_v4=192.0.2.254 gateway_v6=2001:db8:1::fffe
   
   managed-node-02.example.com interface=enp1s0 ip_v4=192.0.2.2/24 ip_v6=2001:db8:1::2/64 gateway_v4=192.0.2.254 gateway_v6=2001:db8:1::fffe

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

   ---
   - name: Configure the network
     hosts: managed-node-01.example.com,managed-node-02.example.com
     tasks:
       - name: Ethernet connection profile with static IP address settings
         ansible.builtin.include_role:
           name: redhat.rhel_system_roles.network
         vars:
           network_connections:
             - name: "{{ interface }}"
               interface_name: "{{ interface }}"
               type: ethernet
               autoconnect: yes
               ip:
                 address:
                   - "{{ ip_v4 }}"
                   - "{{ ip_v6 }}"
                 gateway4: "{{ gateway_v4 }}"
                 gateway6: "{{ gateway_v6 }}"
                 dns:
                   - 192.0.2.200
                   - 2001:db8:1::ffbb
                 dns_search:
                   - example.com
               state: up

   This playbook reads certain values dynamically for each host from the inventory file and uses static values in the playbook for settings which are the same for all hosts.

   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.

3. 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.

4. Run the playbook:

   $ ansible-playbook ~/playbook.yml