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network_interface

WARNING: This role can be dangerous to use. If you lose network connectivity to your target host by incorrectly configuring your networking, you may be unable to recover without physical access to the machine.

This roles enables users to configure various network components on target machines. The role can be used to configure:

  • Ethernet interfaces
  • Bridge interfaces
  • Bonded interfaces
  • Network routes

Requirements

This role requires Ansible 1.4 or higher, and platform requirements are listed in the metadata file.

Role Variables

The variables that can be passed to this role and a brief description about them are as follows:

# The list of ethernet interfaces to be added to the system
network_ether_interfaces: []

# The list of bridge interfaces to be added to the system
network_bridge_interfaces: []

# The list of bonded interfaces to be added to the system
network_bond_interfaces: []

Note: The values for the list are listed in the examples below.

Examples

  1. Configure eth1 and eth2 on a host with a static IP and a dhcp IP. Also define static routes and a gateway.

    • hosts: myhost roles:
      • role: network network_ether_interfaces:
        • device: eth1 bootproto: static address: 192.168.10.18 netmask: 255.255.255.0 gateway: 192.168.10.1 route:
          • network: 192.168.200.0 netmask: 255.255.255.0 gateway: 192.168.10.1
          • network: 192.168.100.0 netmask: 255.255.255.0 gateway: 192.168.10.1
        • device: eth2 bootproto: dhcp

  2. Configure a bridge interface with multiple NIcs added to the bridge.

    • hosts: myhost roles:
      • role: network network_bridge_interfaces:
        • device: br1 type: bridge address: 192.168.10.10 netmask: 255.255.255.0 bootproto: static stp: "on" ports: [eth1, eth2]

Note: Routes can also be added for this interface in the same way routes are added for ethernet interfaces.

  1. Configure a bond interface with an "active-backup" slave configuration.

    • hosts: myhost roles:
      • role: network network_bond_interfaces:
        • device: bond0 address: 192.168.10.128 netmask: 255.255.255.0 bootproto: static bond_mode: active-backup bond_miimon: 100 bond_slaves: [eth1, eth2] route:
          • network: 192.168.222.0 netmask: 255.255.255.0 gateway: 192.168.10.1

  2. Configure a bonded interface with "802.3ad" as the bonding mode and IP address obtained via DHCP.

    • hosts: myhost roles:
      • role: network network_bond_interfaces:
        • device: bond0 bootproto: dhcp bond_mode: 802.3ad bond_miimon: 100 bond_slaves: [eth1, eth2]

  3. All the above examples show how to configure a single host, The below example shows how to define your network configurations for all your machines.

Assume your host inventory is as follows:

/etc/ansible/hosts

[dc1]
host1
host2

Describe your network configuration for each host in host vars:

host_vars/host1

network_ether_interfaces:
       - device: eth1
         bootproto: static
         address: 192.168.10.18
         netmask: 255.255.255.0
         gateway: 192.168.10.1
         route:
          - network: 192.168.200.0
            netmask: 255.255.255.0
            gateway: 192.168.10.1
network_bond_interfaces:
        - device: bond0
          bootproto: dhcp
          bond_mode: 802.3ad
          bond_miimon: 100
          bond_slaves: [eth2, eth3]

host_vars/host2

network_ether_interfaces:
       - device: eth0
         bootproto: static
         address: 192.168.10.18
         netmask: 255.255.255.0
         gateway: 192.168.10.1

Create a playbook which applies this role to all hosts as shown below, and run the playbook. All the servers should have their network interfaces configured and routed updated.

- hosts: all
  roles:
    - role: network

Note: Ansible needs network connectivity throughout the playbook process, you may need to have a control interface that you do not modify using this method so that Ansible has a stable connection to configure the target systems.

Dependencies

None

License

BSD

Author Information

Benno Joy