Question

我正在创建一个基本的AWS CloudFormation模板，其中包含一个VPC，3个安全组和5个EC2实例，我的安全组看起来像这样 -

{
  "WebApplicationServerSG": {
    "Type": "AWS::EC2::SecurityGroup",
    "Properties": {
      "VpcId": {
        "Ref": "DevVpc"
      },
      "GroupDescription": "Enable HTTP, HTTPS and SSH access",
      "Tags": [
        {
          "Key": "Name",
          "Value": "WebApplicationServer Service Group"
        }
      ],
      "SecurityGroupIngress": [
        {
          "IpProtocol": "tcp",
          "FromPort": "443",
          "ToPort": "443",
          "CidrIp": "0.0.0.0/0"
        },
        {
          "IpProtocol": "tcp",
          "FromPort": "80",
          "ToPort": "80",
          "CidrIp": "0.0.0.0/0"
        },
        {
          "IpProtocol": "tcp",
          "FromPort": "22",
          "ToPort": "22",
          "CidrIp": "0.0.0.0/0"
        }
      ],
      "SecurityGroupEgress": [
        {
          "IpProtocol": "tcp",
          "FromPort": "443",
          "ToPort": "443",
          "CidrIp": "0.0.0.0/0"
        },
        {
          "IpProtocol": "tcp",
          "FromPort": "80",
          "ToPort": "80",
          "CidrIp": "0.0.0.0/0"
        },
        {
          "IpProtocol": "tcp",
          "FromPort": "22",
          "ToPort": "22",
          "CidrIp": "0.0.0.0/0"
        }
      ]
    },
    "Metadata": {
      "AWS::CloudFormation::Designer": {
        "id": "a7977f00-48d6-488f-9e23-9bcd0785d399"
      }
    }
  }
}

VPC就像下面这样 -

{
  "DevVpc": {
    "Type": "AWS::EC2::VPC",
    "Properties": {
      "CidrBlock": "172.31.0.0/16",
      "EnableDnsSupport": "false",
      "EnableDnsHostnames": "false",
      "InstanceTenancy": "dedicated",
      "Tags": [
        {
          "Key": "Name",
          "Value": "DevStackVpc"
        }
      ]
    }
  }
}

使用模板创建堆栈时出现错误 -

安全组sg-31f91b5a和子网subnet-ea0aa3a7属于不同的网络。

11:13:01 UTC+0550   CREATE_FAILED   AWS::EC2::Instance  WebApplicationServer    Security group sg-5147a53a and subnet subnet-ea0aa3a7 belong to different networks.

这里有完整模板的gist，真的很感激任何帮助。

Answer 1

我通过评论中提供的指针解决了上述问题，subnet VPC，Security-Groups和EC2实例之间的关系如下所示 -

获得并且应该创建的第一件事是VPC 第二个是Subnet，你提到之前创建的VpcId 3您在此创建security groups，同时提及您之前创建的VpcId。 4有一个属性NetworkInterfaces，您提供SubnetId和GroupSet这是一组安全组ID，您可以在此定义安全组，vpc和子网之间的关系。是什么解决了这个问题。

以下是实际工作的示例模板 -

{
"AWSTemplateFormatVersion": "2010-09-09",
"Parameters": {
    "DevServerKeyPair": {
        "Description": "Name of an existing EC2 KeyPair to enable SSH access to the instance",
        "Type": "AWS::EC2::KeyPair::KeyName",
        "ConstraintDescription": "Must be the name of an existing EC2 KeyPair."
    }
},
"Resources": {
    "DevVpc": {
        "Type": "AWS::EC2::VPC",
        "Properties": {
            "CidrBlock": "172.31.0.0/16",
            "EnableDnsSupport": "false",
            "EnableDnsHostnames": "false",
            "InstanceTenancy": "dedicated",
            "Tags": [
                {
                    "Key": "Name",
                    "Value": "DevStackVpc"
                }
            ]
        }
    },
    "DevSubnet": {
        "Type": "AWS::EC2::Subnet",
        "Properties": {
            "VpcId": {
                "Ref": "DevVpc"
            },
            "CidrBlock": "172.31.0.0/16",
            "AvailabilityZone": {
                "Fn::Select": [
                    0,
                    {
                        "Fn::GetAZs": ""
                    }
                ]
            }
        }
    },
    "WebApplicationServerSG": {
        "Type": "AWS::EC2::SecurityGroup",
        "Properties": {
            "VpcId": {
                "Ref": "DevVpc"
            },
            "GroupDescription": "Enable HTTP, HTTPS and SSH access",
            "Tags": [
                {
                    "Key": "Name",
                    "Value": "WebApplicationServer Service Group"
                }
            ],
            "SecurityGroupIngress": [
                {
                    "IpProtocol": "tcp",
                    "FromPort": "443",
                    "ToPort": "443",
                    "CidrIp": "0.0.0.0/0"
                },
                {
                    "IpProtocol": "tcp",
                    "FromPort": "80",
                    "ToPort": "80",
                    "CidrIp": "0.0.0.0/0"
                },
                {
                    "IpProtocol": "tcp",
                    "FromPort": "22",
                    "ToPort": "22",
                    "CidrIp": "0.0.0.0/0"
                }
            ],
            "SecurityGroupEgress": [
                {
                    "IpProtocol": "tcp",
                    "FromPort": "443",
                    "ToPort": "443",
                    "CidrIp": "0.0.0.0/0"
                },
                {
                    "IpProtocol": "tcp",
                    "FromPort": "80",
                    "ToPort": "80",
                    "CidrIp": "0.0.0.0/0"
                },
                {
                    "IpProtocol": "tcp",
                    "FromPort": "22",
                    "ToPort": "22",
                    "CidrIp": "0.0.0.0/0"
                }
            ]
        }
    },
    "WebApplicationServer": {
        "Type": "AWS::EC2::Instance",
        "Properties": {
            "ImageId": "ami-f3e5aa9c",
            "InstanceType": "t2.micro",
            "Tags": [
                {
                    "Key": "Name",
                    "Value": "WebApplicationServer"
                }
            ],
            "KeyName": {
                "Ref": "DevServerKeyPair"
            },
            "NetworkInterfaces": [
                {
                    "SubnetId": {"Ref": "DevSubnet"},
                    "AssociatePublicIpAddress": "true",
                    "DeviceIndex": "0",
                    "GroupSet": [{ "Ref" : "WebApplicationServerSG" }]
                }
            ]
        }
    }
  }
}

希望它可以帮助有人解决类似的问题。

Answer 2

您尝试使用的安全组有问题！当您使用模板创建模板时，它将使用默认的VPC。在创建安全组的CLoudFormation模板上，您需要标识要使用的VpcId（非默认值），它将解决此问题。或者，您可以使用（NON-Default）VPC手动创建一个新的安全组，然后运行新实例。

Answer 3

如果有人使用Terraform来到这里，我也会收到类似的错误消息，并且最终发生的事情如下：

variable "name" {}

locals {
  vpc_id    = "..."
  subnet_id = "..."
}

resource "aws_instance" "web" {
  ami                         = "ami-09def150731bdbcc2"
  instance_type               = "t3.micro"
  vpc_security_group_ids      = ["${aws_security_group.allow_http.id}"]

  user_data = <<-EOF
    #!/bin/bash
    sudo amazon-linux-extras install nginx1.12 -y
    sudo nginx
  EOF

  tags {
    Name = "${var.name}"
  }
}

resource "aws_security_group" "allow_http" {
  description = "Allow inbound HTTP traffic for ${var.name} instance"
  vpc_id      = "${local.vpc_id}"

  ingress {
    from_port   = 80
    to_port     = 80
    protocol    = "TCP"
    cidr_blocks = ["0.0.0.0/0"]
  }

  egress {
    from_port   = 0
    to_port     = 0
    protocol    = "-1"
    cidr_blocks = ["0.0.0.0/0"]
  }
}

我要部署到的子网未启用auto assign public IPs。因此，我更新了aws_instance，使其包含subnet_id和associate_public_ip_address：

resource "aws_instance" "web" {
  ami                         = "ami-09def150731bdbcc2"
  instance_type               = "t3.micro"
  subnet_id                   = "${local.subnet_id}"
  vpc_security_group_ids      = ["${aws_security_group.allow_http.id}"]
  associate_public_ip_address = true

  user_data = <<-EOF
    #!/bin/bash
    sudo amazon-linux-extras install nginx1.12 -y
    sudo nginx
  EOF

  tags {
    Name = "${var.name}"
  }
}

此后，一切正常。

安全组和子网属于不同的网络

3 个答案: