Define interfaces

Define interfaces

Since Cookiecutter is simply a tool to generate projects from templates, it cannot handle all networking use-cases. Your cluster may include a single interface, two interfaces in bond, bond and management interfaces, and so on.

This section explains how to handle 3 interfaces configuration:

  • eth0 interface for pxe

  • eth1 and eth2 as bond0 slave interfaces

To configure network interfaces:

  1. Open your MCP Git project repository.

  2. Open the {{ cookiecutter.cluster_name }}/kubernetes/init.yml file for editing.

  3. Add the following example definition to this file:

    parameters:
    
     _param:
       deploy_nic: eth0
       primary_first_nic: eth1
       primary_second_nic: eth2
     linux:
       ...
       network:
       ...
         interface:
           deploy_nic:
             name: ${_param:deploy_nic}
             enabled: true
             type: eth
             proto: static
             address: ${_param:deploy_address}
             netmask: 255.255.255.0
           primary_first_nic:
             name: ${_param:primary_first_nic}
             enabled: true
             type: slave
             master: bond0
             mtu: 9000
             pre_up_cmds:
             - /sbin/ethtool --offload eth6 rx off tx off tso off gro off
           primary_second_nic:
             name: ${_param:primary_second_nic}
             type: slave
             master: bond0
             mtu: 9000
             pre_up_cmds:
             - /sbin/ethtool --offload eth7 rx off tx off tso off gro off
           bond0:
             enabled: true
             proto: static
             type: bond
             use_interfaces:
             - ${_param:primary_first_nic}
             - ${_param:primary_second_nic}
             slaves: ${_param:primary_first_nic} ${_param:primary_second_nic}
             mode: active-backup
             mtu: 9000
             address: ${_param:single_address}
             netmask: 255.255.255.0
             name_servers:
              - {{ cookiecutter.dns_server01 }}
              - {{ cookiecutter.dns_server02 }}