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14.6. 创建使用 AWS 本地区域的 VPC

您必须在 OpenShift Container Platform 集群的 Amazon Web Services (AWS) 中创建一个 Virtual Private Cloud (VPC) 和子网，以将 worker 节点扩展到边缘位置。您可以进一步自定义 VPC 以满足您的要求，包括 VPN、路由表和添加新的 Local Zone 子网，这些子网没有包括在初始部署中。

您可以使用提供的 CloudFormation 模板和自定义参数文件创建代表 VPC 的 AWS 资源堆栈。

注意

如果不使用提供的 CloudFormation 模板来创建 AWS 基础架构，您必须检查提供的信息并手动创建基础架构。如果集群没有正确初始化，您可能需要联系红帽支持并提供您的安装日志。

先决条件

  • 已配置了一个 AWS 帐户。
  • 您可以通过运行 aws configure，将 AWS 密钥和区域添加到本地 AWS 配置集中。
  • 您可以选择 AWS 帐户上的 AWS 区域区域。

流程

  1. 创建一个 JSON 文件，其包含模板所需的参数值： 

    [
  {
    "ParameterKey": "ClusterName",
    1 
    
    "ParameterValue": "mycluster"
    2 
    
  },
  {
    "ParameterKey": "VpcCidr",
    3 
    
    "ParameterValue": "10.0.0.0/16"
    4 
    
  },
  {
    "ParameterKey": "AvailabilityZoneCount",
    5 
    
    "ParameterValue": "3"
    6 
    
  },
  {
    "ParameterKey": "SubnetBits",
    7 
    
    "ParameterValue": "12"
    8 
    
  }
]
    Copy to Clipboard Toggle word wrap
    1
    一个简短的、代表集群的名称用于主机名等。
    2
    指定您为集群生成 install-config.yaml 文件时所用的集群名称。
    3
    VPC 的 CIDR 块。
    4
    以 x.x.x.x/16-24 格式指定 CIDR 块。
    5
    在其中部署 VPC 的可用区的数量。
    6
    指定一个 1 到 3 之间的整数。
    7
    各个可用区中每个子网的大小。
    8
    指定 5 到 13 之间的整数，其中 5 为 /27，13 为 /19。
  2. 复制本主题的 VPC 的 CloudFormation 模板部分中的模板，并将它以 YAML 文件形式保存到计算机上。此模板描述了集群所需的 VPC。

  3. 运行以下命令，启动 CloudFormation 模板以创建代表 VPC 的 AWS 资源堆栈：

    重要

    您必须在一行内输入命令。 

    $ aws cloudformation create-stack --stack-name <name> \
    1 
    
     --template-body file://<template>.yaml \
    2 
    
     --parameters file://<parameters>.json
    3
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    1
    <name> 是 CloudFormation 堆栈的名称，如 cluster-VPC。如果您删除集群，则需要此堆栈的名称。
    2
    <template> 是您保存的 CloudFormation 模板 YAML 文件的相对路径和名称。
    3
    <parameters> 是 CloudFormation 参数 JSON 文件的相对路径和名称。

    输出示例

    arn:aws:cloudformation:us-east-1:123456789012:stack/cluster-vpc/dbedae40-2fd3-11eb-820e-12a48460849f
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  4. 运行以下命令确认模板组件已存在： 

    $ aws cloudformation describe-stacks --stack-name <name>
    Copy to Clipboard Toggle word wrap

    在 StackStatus 显示 CREATE_COMPLETE 后，输出会显示以下参数的值。您必须将这些参数值提供给您在创建集群时要运行的其他 CloudFormation 模板：

    VpcId

    您的 VPC ID。

    PublicSubnetIds

    新公共子网的 ID。

    PrivateSubnetIds

    新专用子网的 ID。

    PublicRouteTableId

    新公共路由表 ID 的 ID。

您可以使用以下 CloudFormation 模板来部署使用 AWS Local Zones 的 OpenShift Container Platform 集群所需的 VPC。

例 14.1. VPC 的 CloudFormation 模板

AWSTemplateFormatVersion: 2010-09-09
Description: Template for Best Practice VPC with 1-3 AZs

Parameters:
  ClusterName:
    Type: String
    Description: ClusterName used to prefix resource names
  VpcCidr:
    AllowedPattern: ^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])(\/(1[6-9]|2[0-4]))$
    ConstraintDescription: CIDR block parameter must be in the form x.x.x.x/16-24.
    Default: 10.0.0.0/16
    Description: CIDR block for VPC.
    Type: String
  AvailabilityZoneCount:
    ConstraintDescription: "The number of availability zones. (Min: 1, Max: 3)"
    MinValue: 1
    MaxValue: 3
    Default: 1
    Description: "How many AZs to create VPC subnets for. (Min: 1, Max: 3)"
    Type: Number
  SubnetBits:
    ConstraintDescription: CIDR block parameter must be in the form x.x.x.x/19-27.
    MinValue: 5
    MaxValue: 13
    Default: 12
    Description: "Size of each subnet to create within the availability zones. (Min: 5 = /27, Max: 13 = /19)"
    Type: Number

Metadata:
  AWS::CloudFormation::Interface:
    ParameterGroups:
    - Label:
        default: "Network Configuration"
      Parameters:
      - VpcCidr
      - SubnetBits
    - Label:
        default: "Availability Zones"
      Parameters:
      - AvailabilityZoneCount
    ParameterLabels:
      ClusterName:
        default: ""
      AvailabilityZoneCount:
        default: "Availability Zone Count"
      VpcCidr:
        default: "VPC CIDR"
      SubnetBits:
        default: "Bits Per Subnet"

Conditions:
  DoAz3: !Equals [3, !Ref AvailabilityZoneCount]
  DoAz2: !Or [!Equals [2, !Ref AvailabilityZoneCount], Condition: DoAz3]

Resources:
  VPC:
    Type: "AWS::EC2::VPC"
    Properties:
      EnableDnsSupport: "true"
      EnableDnsHostnames: "true"
      CidrBlock: !Ref VpcCidr
      Tags:
      - Key: Name
        Value: !Join [ "", [ !Ref ClusterName, "-vpc" ] ]
      - Key: !Join [ "", [ "kubernetes.io/cluster/unmanaged" ] ]
        Value: "shared"

  PublicSubnet:
    Type: "AWS::EC2::Subnet"
    Properties:
      VpcId: !Ref VPC
      CidrBlock: !Select [0, !Cidr [!Ref VpcCidr, 6, !Ref SubnetBits]]
      AvailabilityZone: !Select
      - 0
      - Fn::GetAZs: !Ref "AWS::Region"
      Tags:
      - Key: Name
        Value: !Join [ "", [ !Ref ClusterName, "-public-1" ] ]
  PublicSubnet2:
    Type: "AWS::EC2::Subnet"
    Condition: DoAz2
    Properties:
      VpcId: !Ref VPC
      CidrBlock: !Select [1, !Cidr [!Ref VpcCidr, 6, !Ref SubnetBits]]
      AvailabilityZone: !Select
      - 1
      - Fn::GetAZs: !Ref "AWS::Region"
      Tags:
      - Key: Name
        Value: !Join [ "", [ !Ref ClusterName, "-public-2" ] ]
  PublicSubnet3:
    Type: "AWS::EC2::Subnet"
    Condition: DoAz3
    Properties:
      VpcId: !Ref VPC
      CidrBlock: !Select [2, !Cidr [!Ref VpcCidr, 6, !Ref SubnetBits]]
      AvailabilityZone: !Select
        - 2
        - Fn::GetAZs: !Ref "AWS::Region"
      Tags:
      - Key: Name
        Value: !Join [ "", [ !Ref ClusterName, "-public-3" ] ]

  InternetGateway:
    Type: "AWS::EC2::InternetGateway"
    Properties:
      Tags:
      - Key: Name
        Value: !Join [ "", [ !Ref ClusterName, "-igw" ] ]
  GatewayToInternet:
    Type: "AWS::EC2::VPCGatewayAttachment"
    Properties:
      VpcId: !Ref VPC
      InternetGatewayId: !Ref InternetGateway

  PublicRouteTable:
    Type: "AWS::EC2::RouteTable"
    Properties:
      VpcId: !Ref VPC
      Tags:
      - Key: Name
        Value: !Join [ "", [ !Ref ClusterName, "-rtb-public" ] ]
  PublicRoute:
    Type: "AWS::EC2::Route"
    DependsOn: GatewayToInternet
    Properties:
      RouteTableId: !Ref PublicRouteTable
      DestinationCidrBlock: 0.0.0.0/0
      GatewayId: !Ref InternetGateway
  PublicSubnetRouteTableAssociation:
    Type: "AWS::EC2::SubnetRouteTableAssociation"
    Properties:
      SubnetId: !Ref PublicSubnet
      RouteTableId: !Ref PublicRouteTable
  PublicSubnetRouteTableAssociation2:
    Type: "AWS::EC2::SubnetRouteTableAssociation"
    Properties:
      SubnetId: !Ref PublicSubnet2
      RouteTableId: !Ref PublicRouteTable
  PublicSubnetRouteTableAssociation3:
    Type: "AWS::EC2::SubnetRouteTableAssociation"
    Properties:
      SubnetId: !Ref PublicSubnet3
      RouteTableId: !Ref PublicRouteTable

  PrivateSubnet:
    Type: "AWS::EC2::Subnet"
    Properties:
      VpcId: !Ref VPC
      CidrBlock: !Select [3, !Cidr [!Ref VpcCidr, 6, !Ref SubnetBits]]
      AvailabilityZone: !Select
      - 0
      - Fn::GetAZs: !Ref "AWS::Region"
      Tags:
      - Key: Name
        Value: !Join [ "", [ !Ref ClusterName, "-private-1" ] ]
  PrivateRouteTable:
    Type: "AWS::EC2::RouteTable"
    Properties:
      VpcId: !Ref VPC
      Tags:
      - Key: Name
        Value: !Join [ "", [ !Ref ClusterName, "-rtb-private-1" ] ]
  PrivateSubnetRouteTableAssociation:
    Type: "AWS::EC2::SubnetRouteTableAssociation"
    Properties:
      SubnetId: !Ref PrivateSubnet
      RouteTableId: !Ref PrivateRouteTable
  NAT:
    DependsOn:
    - GatewayToInternet
    Type: "AWS::EC2::NatGateway"
    Properties:
      AllocationId:
        "Fn::GetAtt":
        - EIP
        - AllocationId
      SubnetId: !Ref PublicSubnet
      Tags:
      - Key: Name
        Value: !Join [ "", [ !Ref ClusterName, "-natgw-private-1" ] ]
  EIP:
    Type: "AWS::EC2::EIP"
    Properties:
      Domain: vpc
  Route:
    Type: "AWS::EC2::Route"
    Properties:
      RouteTableId:
        Ref: PrivateRouteTable
      DestinationCidrBlock: 0.0.0.0/0
      NatGatewayId:
        Ref: NAT

  PrivateSubnet2:
    Type: "AWS::EC2::Subnet"
    Condition: DoAz2
    Properties:
      VpcId: !Ref VPC
      CidrBlock: !Select [4, !Cidr [!Ref VpcCidr, 6, !Ref SubnetBits]]
      AvailabilityZone: !Select
      - 1
      - Fn::GetAZs: !Ref "AWS::Region"
      Tags:
      - Key: Name
        Value: !Join [ "", [ !Ref ClusterName, "-private-2" ] ]
  PrivateRouteTable2:
    Type: "AWS::EC2::RouteTable"
    Condition: DoAz2
    Properties:
      VpcId: !Ref VPC
      Tags:
      - Key: Name
        Value: !Join [ "", [ !Ref ClusterName, "-rtb-private-2" ] ]
  PrivateSubnetRouteTableAssociation2:
    Type: "AWS::EC2::SubnetRouteTableAssociation"
    Condition: DoAz2
    Properties:
      SubnetId: !Ref PrivateSubnet2
      RouteTableId: !Ref PrivateRouteTable2
  NAT2:
    DependsOn:
    - GatewayToInternet
    Type: "AWS::EC2::NatGateway"
    Condition: DoAz2
    Properties:
      AllocationId:
        "Fn::GetAtt":
        - EIP2
        - AllocationId
      SubnetId: !Ref PublicSubnet2
      Tags:
      - Key: Name
        Value: !Join [ "", [ !Ref ClusterName, "-natgw-private-2" ] ]
  EIP2:
    Type: "AWS::EC2::EIP"
    Condition: DoAz2
    Properties:
      Domain: vpc
      Tags:
      - Key: Name
        Value: !Join [ "", [ !Ref ClusterName, "-eip-private-2" ] ]
  Route2:
    Type: "AWS::EC2::Route"
    Condition: DoAz2
    Properties:
      RouteTableId:
        Ref: PrivateRouteTable2
      DestinationCidrBlock: 0.0.0.0/0
      NatGatewayId:
        Ref: NAT2

  PrivateSubnet3:
    Type: "AWS::EC2::Subnet"
    Condition: DoAz3
    Properties:
      VpcId: !Ref VPC
      CidrBlock: !Select [5, !Cidr [!Ref VpcCidr, 6, !Ref SubnetBits]]
      AvailabilityZone: !Select
      - 2
      - Fn::GetAZs: !Ref "AWS::Region"
      Tags:
      - Key: Name
        Value: !Join [ "", [ !Ref ClusterName, "-private-3" ] ]
  PrivateRouteTable3:
    Type: "AWS::EC2::RouteTable"
    Condition: DoAz3
    Properties:
      VpcId: !Ref VPC
      Tags:
      - Key: Name
        Value: !Join [ "", [ !Ref ClusterName, "-rtb-private-3" ] ]
  PrivateSubnetRouteTableAssociation3:
    Type: "AWS::EC2::SubnetRouteTableAssociation"
    Condition: DoAz3
    Properties:
      SubnetId: !Ref PrivateSubnet3
      RouteTableId: !Ref PrivateRouteTable3
  NAT3:
    DependsOn:
    - GatewayToInternet
    Type: "AWS::EC2::NatGateway"
    Condition: DoAz3
    Properties:
      AllocationId:
        "Fn::GetAtt":
        - EIP3
        - AllocationId
      SubnetId: !Ref PublicSubnet3
      Tags:
      - Key: Name
        Value: !Join [ "", [ !Ref ClusterName, "-natgw-private-3" ] ]
  EIP3:
    Type: "AWS::EC2::EIP"
    Condition: DoAz3
    Properties:
      Domain: vpc
      Tags:
      - Key: Name
        Value: !Join [ "", [ !Ref ClusterName, "-eip-private-3" ] ]
  Route3:
    Type: "AWS::EC2::Route"
    Condition: DoAz3
    Properties:
      RouteTableId:
        Ref: PrivateRouteTable3
      DestinationCidrBlock: 0.0.0.0/0
      NatGatewayId:
        Ref: NAT3

  S3Endpoint:
    Type: AWS::EC2::VPCEndpoint
    Properties:
      PolicyDocument:
        Version: 2012-10-17
        Statement:
        - Effect: Allow
          Principal: '*'
          Action:
          - '*'
          Resource:
          - '*'
      RouteTableIds:
      - !Ref PublicRouteTable
      - !Ref PrivateRouteTable
      - !If [DoAz2, !Ref PrivateRouteTable2, !Ref "AWS::NoValue"]
      - !If [DoAz3, !Ref PrivateRouteTable3, !Ref "AWS::NoValue"]
      ServiceName: !Join
      - ''
      - - com.amazonaws.
        - !Ref 'AWS::Region'
        - .s3
      VpcId: !Ref VPC

Outputs:
  VpcId:
    Description: ID of the new VPC.
    Value: !Ref VPC
  PublicSubnetIds:
    Description: Subnet IDs of the public subnets.
    Value:
      !Join [
        ",",
        [!Ref PublicSubnet, !If [DoAz2, !Ref PublicSubnet2, !Ref "AWS::NoValue"], !If [DoAz3, !Ref PublicSubnet3, !Ref "AWS::NoValue"]]
      ]
  PrivateSubnetIds:
    Description: Subnet IDs of the private subnets.
    Value:
      !Join [
        ",",
        [!Ref PrivateSubnet, !If [DoAz2, !Ref PrivateSubnet2, !Ref "AWS::NoValue"], !If [DoAz3, !Ref PrivateSubnet3, !Ref "AWS::NoValue"]]
      ]
  PublicRouteTableId:
    Description: Public Route table ID
    Value: !Ref PublicRouteTable
  PrivateRouteTableId:
    Description: Private Route table ID
    Value: !Ref PrivateRouteTable
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