如何让我的VPC通过云端访问互联网？

我有一个VPC设置，我的lambda函数可以与我的RDS服务器交谈。这是行得通的。我也需要我的lambda功能才能访问互联网。为此，我试图设置一个互联网网关和允许它的路线。我失败了。如何让我的VPC通过云端访问互联网？

的VPC路由和网关创建为以下

"VPC": { 
    "Type": "AWS::EC2::VPC", 
    "Properties": { 
    "CidrBlock": "10.0.0.0/16", 
    "EnableDnsSupport": "true", 
    "EnableDnsHostnames": "true", 
    "InstanceTenancy": "default", 
    "Tags" : [{ "Key": "Name", "Value": { "Ref": "DomainName" } }] 
    } 
}, 

"VPCRouteTable" : { 
    "Type" : "AWS::EC2::RouteTable", 
    "Properties" : { 
     "VpcId" : { "Ref" : "VPC" }, 
     "Tags" : [{ "Key": "Name", "Value": { "Ref": "DomainName" } }] 
    } 
}, 

"InternetGateway" : { 
    "Type" : "AWS::EC2::InternetGateway", 
    "Properties" : { 
    "Tags" : [{ "Key": "Name", "Value": { "Ref": "DomainName" } }] 
    } 
}, 

"AttachGateway": { 
    "Type" : "AWS::EC2::VPCGatewayAttachment", 
    "Properties" : { 
     "VpcId" : { "Ref" : "VPC" }, 
     "InternetGatewayId" : { "Ref" : "InternetGateway" } 
    } 
}, 

"InternetRoute" : { 
    "Type" : "AWS::EC2::Route", 
    "DependsOn" : "InternetGateway", 
    "Properties" : { 
     "RouteTableId" : { "Ref" : "VPCRouteTable" }, 
     "DestinationCidrBlock" : "0.0.0.0/0", 
     "GatewayId" : { "Ref" : "InternetGateway" } 
    } 
},

我创建子网并将其与路由表

"SubnetA": { 
    "Type": "AWS::EC2::Subnet", 
    "Properties": { 
    "VpcId": { "Ref": "VPC" }, 
    "CidrBlock": "10.0.0.0/24", 
    "AvailabilityZone": { "Fn::Select": [ "0", { "Fn::GetAZs": { "Ref": "AWS::Region" } }]}, 
    "Tags" : [{ "Key": "Name", "Value": { "Ref": "DomainName" } }] 
    } 
}, 

"SubnetB": { 
    "Type": "AWS::EC2::Subnet", 
    "Properties": { 
    "VpcId": { "Ref": "VPC" }, 
    "CidrBlock": "10.0.1.0/24", 
    "AvailabilityZone": { "Fn::Select": [ "1", { "Fn::GetAZs": { "Ref": "AWS::Region" } }]}, 
    "Tags" : [{ "Key": "Name", "Value": { "Ref": "DomainName" } }] 
    } 
}, 

"SubnetARouteTableAssociation" : { 
    "Type" : "AWS::EC2::SubnetRouteTableAssociation", 
    "Properties" : { 
     "SubnetId" : { "Ref" : "SubnetA" }, 
     "RouteTableId" : { "Ref" : "VPCRouteTable" } 
    } 
}, 

"SubnetBRouteTableAssociation" : { 
    "Type" : "AWS::EC2::SubnetRouteTableAssociation", 
    "Properties" : { 
     "SubnetId" : { "Ref" : "SubnetB" }, 
     "RouteTableId" : { "Ref" : "VPCRouteTable" } 
    } 
},

我有数据库安全组关联

"DBSubnetGroup": { 
    "Type": "AWS::RDS::DBSubnetGroup", 
    "Properties": { 
    "DBSubnetGroupDescription": "Database Access", 
    "SubnetIds" : [{ "Ref": "SubnetA" }, { "Ref": "SubnetB" }], 
    "Tags" : [{ "Key": "Name", "Value": { "Ref": "DomainName" } }] 
    } 
}, 

"DBEC2SecurityGroup": { 
    "Type": "AWS::EC2::SecurityGroup", 
    "Properties": { 
    "GroupDescription": "Security group for RDS DB Instance", 
    "VpcId": {"Ref": "VPC"}, 
    "SecurityGroupIngress" : [{ 
     "IpProtocol": "tcp", 
     "FromPort": "3306", 
     "ToPort": "3306", 
     "CidrIp": "10.0.0.0/16" 
    }], 
    "Tags" : [{ "Key": "Name", "Value": { "Ref": "DomainName" } }] 
    } 
},

和拉姆达安全组

"LambdaSecurityGroup": { 
    "Type": "AWS::EC2::SecurityGroup", 
    "Properties": { 
    "GroupDescription": "Security group for Lambda", 
    "VpcId": {"Ref": "VPC"}, 
    "Tags" : [{ "Key": "Name", "Value": { "Ref": "DomainName" } }] 
    } 
},

因此，现在，我的lambda可以与数据库交谈就好了。但他们无法到达互联网。我错过了什么？

来源

2017-04-14 Justin808

如果您的lambda函数需要访问您的VPC资源和Internet，然后创建2个子网：public和private。将您的lambda放入私有子网并在公有子网中配置NAT。

从http://docs.aws.amazon.com/lambda/latest/dg/vpc.html

因此，如果您的lambda函数需要Internet访问（例如，访问AWS服务没有终点VPC，如亚马逊室壁运动），可以配置NAT VPC内的实例或可以使用Amazon VPC NAT网关。有关更多信息，请参阅Amazon VPC用户指南中的NAT 网关。

来源

2017-04-14 11:40:05 Vor

我的理解是我不需要昂贵的ec2，每天24小时运行NAT。由于这个原因，AWS制作了互联网网关。我不想运行和ec2实例。 – Justin808

@ Justin808你的理解是不正确的。互联网网关仅由公共子网上的实体使用，该网络也具有关联的公共IP地址。要从没有公共IP地址的任何实体（包括Lambda容器）访问Internet，需要NAT网关（不在EC2实例上运行）或NAT实例（当然是EC2实例）** ** 。您可以使用t2.nano作为完美的NAT实例，价格约为5美元/月。 –

如何让我的VPC通过云端访问互联网？

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