4.4. 为 BGP 创建数据平面网络

要创建 data plane 网络，请定义一个 NetConfig 自定义资源(CR)并为 data plane 网络指定所有子网。您必须为您的数据平面至少定义一个 control plane 网络。您还可以定义 VLAN 网络，为可组合网络创建网络隔离，如 InternalAPI、Storage 和 External。每个网络定义必须包含 IP 地址分配。

提示

使用以下命令查看 NetConfig CRD 定义和规格模式：

oc describe crd netconfig
oc explain netconfig.spec

$ oc describe crd netconfig

$ oc explain netconfig.spec

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流程

在工作站上创建一个名为 netconfig_bgp.yaml 的文件。

将以下配置添加到 netconfig_bgp.yaml 以创建 NetConfig CR：

apiVersion: network.openstack.org/v1beta1
kind: NetConfig
metadata:
  name: bgp-netconfig
  namespace: openstack

apiVersion: network.openstack.org/v1beta1
kind: NetConfig
metadata:
  name: bgp-netconfig
  namespace: openstack

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在 netconfig_bgp.yaml 文件中，为每个 data plane 网络定义拓扑。要在 OpenShift (RHOSO)网络中使用默认的 Red Hat OpenStack Services，您必须为每个网络定义一个规格。有关默认 RHOSO 网络的信息，请参阅 BGP 的 OpenShift 网络上的默认 Red Hat OpenStack Services。以下示例为数据平面创建隔离网络：

apiVersion: network.openstack.org/v1beta1
kind: NetConfig
metadata:
  name: bgp-netconfig
  namespace: openstack
spec:
  networks:
  - name: ctlplane 
    dnsDomain: ctlplane.example.com
    serviceNetwork: ctlplane
    mtu: 1500
    subnets: 
    - name: subnet1 
      allocationRanges: 
      - end: 192.168.122.120
        start: 192.168.122.100
      - end: 192.168.122.200
        start: 192.168.122.150
      cidr: 192.168.122.0/24
      gateway: 192.168.122.1
    - name: subnet2
      allocationRanges:
      - end: 192.168.123.120
        start: 192.168.123.100
      - end: 192.168.123.200
        start: 192.168.123.150
      cidr: 192.168.123.0/24
      gateway: 192.168.123.1
    - name: subnet3
      allocationRanges:
      - end: 192.168.124.120
        start: 192.168.124.100
      - end: 192.168.124.200
        start: 192.168.124.150
      cidr: 192.168.124.0/24
      gateway: 192.168.124.1
  - name: internalapi
    dnsDomain: internalapi.example.com
    serviceNetwork: internalapi
    mtu: 1500
    subnets:
    - name: subnet1
      allocationRanges:
      - end: 172.17.0.250
        start: 172.17.0.100
      cidr: 172.17.0.0/24
    vlan: 20 
  - name: external
    dnsDomain: external.example.com
    mtu: 1500
    subnets:
    - name: subnet1
      allocationRanges:
      - end: 192.168.32.250
        start: 192.168.32.130
      cidr: 192.168.32.0/20
    vlan: 99
  - name: storage
    dnsDomain: storage.example.com
    mtu: 1500
    subnets:
    - name: subnet1
      allocationRanges:
      - end: 172.18.0.250
        start: 172.18.0.100
    cidr: 172.18.0.0/24
    vlan: 21
  - name: tenant
    dnsDomain: tenant.example.com
    mtu: 1500
    subnets:
    - name: subnet1
      allocationRanges:
      - end: 172.19.0.250
        start: 172.19.0.100
      cidr: 172.19.0.0/24
    vlan: 22

apiVersion: network.openstack.org/v1beta1
kind: NetConfig
metadata:
  name: bgp-netconfig
  namespace: openstack
spec:
  networks:
  - name: ctlplane


    dnsDomain: ctlplane.example.com
    serviceNetwork: ctlplane
    mtu: 1500
    subnets:


    - name: subnet1


      allocationRanges:


      - end: 192.168.122.120
        start: 192.168.122.100
      - end: 192.168.122.200
        start: 192.168.122.150
      cidr: 192.168.122.0/24
      gateway: 192.168.122.1
    - name: subnet2
      allocationRanges:
      - end: 192.168.123.120
        start: 192.168.123.100
      - end: 192.168.123.200
        start: 192.168.123.150
      cidr: 192.168.123.0/24
      gateway: 192.168.123.1
    - name: subnet3
      allocationRanges:
      - end: 192.168.124.120
        start: 192.168.124.100
      - end: 192.168.124.200
        start: 192.168.124.150
      cidr: 192.168.124.0/24
      gateway: 192.168.124.1
  - name: internalapi
    dnsDomain: internalapi.example.com
    serviceNetwork: internalapi
    mtu: 1500
    subnets:
    - name: subnet1
      allocationRanges:
      - end: 172.17.0.250
        start: 172.17.0.100
      cidr: 172.17.0.0/24
    vlan: 20


  - name: external
    dnsDomain: external.example.com
    mtu: 1500
    subnets:
    - name: subnet1
      allocationRanges:
      - end: 192.168.32.250
        start: 192.168.32.130
      cidr: 192.168.32.0/20
    vlan: 99
  - name: storage
    dnsDomain: storage.example.com
    mtu: 1500
    subnets:
    - name: subnet1
      allocationRanges:
      - end: 172.18.0.250
        start: 172.18.0.100
    cidr: 172.18.0.0/24
    vlan: 21
  - name: tenant
    dnsDomain: tenant.example.com
    mtu: 1500
    subnets:
    - name: subnet1
      allocationRanges:
      - end: 172.19.0.250
        start: 172.19.0.100
      cidr: 172.19.0.0/24
    vlan: 22

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1: 网络的名称，如 CtlPlane。
2: IPv4 子网规格。
3: 子网的名称，如 subnet1。
4: NetConfig allocationRange。allocationRange 不得与 MetalLB IPAddressPool 范围和 IP 地址池范围重叠。
5: 网络 VLAN。有关默认 RHOSO 网络的信息，请参阅 BGP 的 OpenShift 网络上的默认 Red Hat OpenStack Services。

在 netconfig_bgp.yaml 文件中，定义在每个区内建立连接的网络接口。以下示例定义了两个网络接口，eth2 的 bgpnet0 和 bgpnet1 用于 'eth3，每个区都有一个子网：

  - name: bgpnet0 
    dnsDomain: bgpnet0.example.com
    serviceNetwork: bgpnet0
    mtu: 1500
    subnets:
    - name: subnet0
      allocationRanges:
      - end: 100.64.0.36
        start: 100.64.0.1
      cidr: 100.64.0.0/24
      gateway: 100.64.0.1
      routes:
      - destination: 0.0.0.0/0
        nexthop: 100.64.0.1
    - name: subnet1
      allocationRanges:
      - end: 100.64.1.36
        start: 100.64.1.1
      cidr: 100.64.1.0/24
      gateway: 100.64.1.1
      routes:
      - destination: 0.0.0.0/0
        nexthop: 100.64.1.1
    - name: subnet2
      allocationRanges:
      - end: 100.64.2.36
        start: 100.64.2.1
      cidr: 100.64.2.0/24
      gateway: 100.64.2.1
      routes:
      - destination: 0.0.0.0/0
        nexthop: 100.64.2.1
  - name: bgpnet1 
    dnsDomain: bgpnet1.example.com
    serviceNetwork: bgpnet1
    mtu: 1500
    subnets:
    - name: subnet0
      allocationRanges:
      - end: 100.65.0.36
        start: 100.65.0.1
      cidr: 100.65.0.0/24
      gateway: 100.65.0.1
      routes:
      - destination: 0.0.0.0/0
        nexthop: 100.65.0.1
    - name: subnet1
      allocationRanges:
      - end: 100.65.1.36
        start: 100.65.1.1
      cidr: 100.65.1.0/24
      gateway: 100.65.1.1
      routes:
      - destination: 0.0.0.0/0
        nexthop: 100.65.1.1
    - name: subnet2
      allocationRanges:
      - end: 100.65.2.36
        start: 100.65.2.1
      cidr: 100.65.2.0/24
      gateway: 100.65.2.1
      routes:
      - destination: 0.0.0.0/0
        nexthop: 100.65.2.1

  - name: bgpnet0


    dnsDomain: bgpnet0.example.com
    serviceNetwork: bgpnet0
    mtu: 1500
    subnets:
    - name: subnet0
      allocationRanges:
      - end: 100.64.0.36
        start: 100.64.0.1
      cidr: 100.64.0.0/24
      gateway: 100.64.0.1
      routes:
      - destination: 0.0.0.0/0
        nexthop: 100.64.0.1
    - name: subnet1
      allocationRanges:
      - end: 100.64.1.36
        start: 100.64.1.1
      cidr: 100.64.1.0/24
      gateway: 100.64.1.1
      routes:
      - destination: 0.0.0.0/0
        nexthop: 100.64.1.1
    - name: subnet2
      allocationRanges:
      - end: 100.64.2.36
        start: 100.64.2.1
      cidr: 100.64.2.0/24
      gateway: 100.64.2.1
      routes:
      - destination: 0.0.0.0/0
        nexthop: 100.64.2.1
  - name: bgpnet1


    dnsDomain: bgpnet1.example.com
    serviceNetwork: bgpnet1
    mtu: 1500
    subnets:
    - name: subnet0
      allocationRanges:
      - end: 100.65.0.36
        start: 100.65.0.1
      cidr: 100.65.0.0/24
      gateway: 100.65.0.1
      routes:
      - destination: 0.0.0.0/0
        nexthop: 100.65.0.1
    - name: subnet1
      allocationRanges:
      - end: 100.65.1.36
        start: 100.65.1.1
      cidr: 100.65.1.0/24
      gateway: 100.65.1.1
      routes:
      - destination: 0.0.0.0/0
        nexthop: 100.65.1.1
    - name: subnet2
      allocationRanges:
      - end: 100.65.2.36
        start: 100.65.2.1
      cidr: 100.65.2.0/24
      gateway: 100.65.2.1
      routes:
      - destination: 0.0.0.0/0
        nexthop: 100.65.2.1

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1: bgpnet0 是 data plane 节点用来与其 BGP peer 通信的网络。
2: bgpnet1 是 data plane 节点用来与其 BGP peer 通信的网络。

在 netconfig_bgp.yaml 文件中，配置 loopback 接口 bgpmainnet 的 IP 地址，供每个节点用来相互通信：

  - name: bgpmainnet
    dnsDomain: bgpmainnet.example.com
    serviceNetwork: bgpmainnet
    mtu: 1500
    subnets:
    - name: subnet0
      allocationRanges:
      - end: 99.99.0.36
        start: 99.99.0.2
      cidr: 99.99.0.0/24
    - name: subnet1
      allocationRanges:
      - end: 99.99.1.36
        start: 99.99.1.2
      cidr: 99.99.1.0/24
    - name: subnet2
      allocationRanges:
      - end: 99.99.2.36
        start: 99.99.2.2
      cidr: 99.99.2.0/24

  - name: bgpmainnet
    dnsDomain: bgpmainnet.example.com
    serviceNetwork: bgpmainnet
    mtu: 1500
    subnets:
    - name: subnet0
      allocationRanges:
      - end: 99.99.0.36
        start: 99.99.0.2
      cidr: 99.99.0.0/24
    - name: subnet1
      allocationRanges:
      - end: 99.99.1.36
        start: 99.99.1.2
      cidr: 99.99.1.0/24
    - name: subnet2
      allocationRanges:
      - end: 99.99.2.36
        start: 99.99.2.2
      cidr: 99.99.2.0/24

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保存 ' netconfig_bgp.yaml' 定义文件。

创建 data plane 网络：

oc create -f  netconfig_bgp.yaml -n openstack

$ oc create -f  netconfig_bgp.yaml -n openstack

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创建名为 bgpconfig.yml 的 BGPConfiguration CR 文件，以通过 BGP 声明 pod 的 IP 地址：

apiVersion: network.openstack.org/v1beta1
kind: BGPConfiguration
metadata:
  name: bgpconfiguration
  namespace: openstack
spec: {}

apiVersion: network.openstack.org/v1beta1
kind: BGPConfiguration
metadata:
  name: bgpconfiguration
  namespace: openstack
spec: {}

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创建 BGPConfiguration CR，为每个 pod 创建所需的 FRR 配置：
```
oc create -f bgpconfig.yml
```
```
$ oc create -f bgpconfig.yml
```
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验证

验证是否已创建 data plane 网络：
```
oc get netconfig/openstacknetconfig -n openstack
```
```
$ oc get netconfig/openstacknetconfig -n openstack
```
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如果您看到错误，请检查底层 network-attach-definition 和节点网络配置策略：
```
oc get network-attachment-definitions -n openstack
oc get nncp
```
```
$ oc get network-attachment-definitions -n openstack
$ oc get nncp
```
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4.4. 为 BGP 创建数据平面网络

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