问题描述
我正在使用一个VPC，3个安全组和5个EC2实例创建一个基本的AWS CloudFormation模板，我的安全组看起来像这样-
I am creating a basic AWS CloudFormation Template with one VPC, 3 Security Group and 5 EC2 Instances my security group looks something like this -
{
"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"
}
}
}
}
如下所示-
{
"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-
I am getting error while stack creation with the template -
11:13:01 UTC+0550 CREATE_FAILED AWS::EC2::Instance WebApplicationServer Security group sg-5147a53a and subnet subnet-ea0aa3a7 belong to different networks.
这是以获得完整的模板，将非常感谢您的帮助。
And here is a gist for complete template, any help would really be appreciated.
推荐答案
我通过注释中提供的指针解决了上述问题，子网 VPC ，安全组和 EC2 实例如下-
I got the above problem resolved by the pointers provided in comments, The relation between subnet VPC, Security-Groups and EC2 instance are as below -
第一件事得到并应该创建的是 VPC
第二个是子网，在这里您提到您先前创建的VpcId
3rd创建安全组在这里您提到 VpcId 也是您之前创建的。
4th有一个属性 NetworkInterfaces ，您可以在其中提供 SubnetId 和 GroupSet 是安全组ID的数组，您可以在其中定义安全组，vpc和子网之间的关系，这就是解决问题的方法。
1st thing which gets and should be created is VPC2nd is the Subnet here you mention the VpcId you created earlier3rd You create security groups here you mention the VpcId you created earlier as well.4th There is a property NetworkInterfaces where you provide SubnetId and GroupSet which is an array of security group ids and this is where you define the relation between the security group, vpc and subnet and this is what solved the problem.
下面是实际工作的示例模板-
Below is the sample template which actually worked -
{
"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" }]
}
]
}
}
}
}
希望它可以帮助调查类似问题的人。
Hope it helps someone looking into similar problem.
这篇关于安全组和子网属于不同的网络的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！