Networking

bx2cloud implements primitive virtual public cloud (VPC) networking functionality through its network and subnetwork resources.

Network

A network is a resource representing a logical network where compute resources can be placed. It is isolated, so resources on one network do not have connectivity with resources on another network. A network is implemented as a linux network namespace. It handles routing between subnetworks (see below) and additionaly handles source NAT and provides connectivity to the host's interfaces.

Creating a network

CLI

bx2cloud network create examples/api/network/create.yaml

examples/api/network/create.yaml

internetAccess: true

Terraform

resource "bx2cloud_network" "my_network" {
  internet_access = true
}

Subnetwork

Within a network, a subnetwork resource can be defined. A subnetwork represents a range of IPs (expressed in CIDR notation) that compute resources can use. It is implemented as a linux bridge interface in the network's linux network namespace.

The network resource can be treated as an L3 router which connects multiple L2 switches (subnetwork resources).

Creating a subnetwork

CLI

bx2cloud subnetwork create examples/api/subnetwork/create.yaml

examples/api/subnetwork/create.yaml

networkId: 4
cidr: 10.0.42.0/24

Terraform

resource "bx2cloud_subnetwork" "my_subnetwork" {
  network_id = bx2cloud_network.my_network.id
  cidr       = "10.0.42.0/24"
}