Configure networking¶

Before you proceed with the networking configuration, read MOS Reference Architecture: Networking.

This section describes how to configure persistent networking on a host with 3 NICs using the Mirantis Container Cloud L2 Templates:

• eno1 is used as a PXE interface

• ens3f1 and ens3f2 are used for bond0

To configure networking:

1. Create subnets:

   ---
   apiVersion: ipam.mirantis.com/v1alpha1
   kind: Subnet
   metadata:
     labels:
       kaas.mirantis.com/provider: baremetal
       kaas.mirantis.com/region: region-one
     name: storage-backend
     namespace: child-ns
   spec:
     cidr: 10.12.0.0/24
   
   ---
   apiVersion: ipam.mirantis.com/v1alpha1
   kind: Subnet
   metadata:
     labels:
       kaas.mirantis.com/provider: baremetal
       kaas.mirantis.com/region: region-one
     name: storage-frontend
     namespace: child-ns
   spec:
     cidr: 10.12.1.0/24
   

2. Create the openstack-example-3nic L2 template:

   Caution

   The bootstrapping engine automatically assigns an IP address to the PXE nic 0 NIC. To prevent the IP duplication during updates, do not assign the IP address manually.

   apiVersion: ipam.mirantis.com/v1alpha1
   kind: L2Template
   metadata:
     labels:
       ipam/Cluster: child-cluster
       kaas.mirantis.com/provider: baremetal
       kaas.mirantis.com/region: region-one
     name: openstack-example-3nic
     namespace: child-ns
   spec:
     autoIfMappingPrio:
     - provision
     - eno
     - ens
     - enp
     npTemplate: |-
       version: 2
       ethernets:
         {{nic 0}}:
           # IMPORTANT: Do not assign an IP address here explicitly
           # to prevent IP duplication issues. The IP will be assigned
           # automatically by the bootstrapping engine.
           # addresses: []
           match:
             macaddress: {{mac 0}}
           set-name: {{nic 0}}
           mtu: 1500
         {{nic 1}}:
           dhcp4: false
           dhcp6: false
           match:
             macaddress: {{mac 1}}
           set-name: {{nic 1}}
           mtu: 1500
         {{nic 2}}:
           dhcp4: false
           dhcp6: false
           match:
             macaddress: {{mac 2}}
           set-name: {{nic 2}}
           mtu: 1500
       bonds:
         bond0:
           interfaces:
             - {{nic 1}}
             - {{nic 2}}
       vlans:
         pr-floating:
           id: 403
           link: bond0
         stor-frontend:
           id: 404
           link: bond0
           addresses:
             - {{ip "stor-frontend:storage-frontend"}}
         stor-backend:
           id: 405
           link: bond0
           addresses:
             - {{ip "stor-backend:storage-backend"}}