我們可以在System Manager 的 Parameter Store裡面定義一些參數，然後在我們的cloudformation 模闆檔案裡面直接調用這些參數。
下面給兩個例子進行說明。
例1. 通過 Parameter Store來傳入參數。
來看看下面的模闆檔案，這是一個标準的模闆檔案，他會建立一個EC2執行個體和一個安全組。參數部分，我們定義了KeyName， InstanceType 和SSHLocation。作為對照，我們嘗試把InstanceType這部分通過Parameter Store的參數替換。
{
"AWSTemplateFormatVersion" : "2010-09-09",
"Description" : "AWS CloudFormation Sample Template EC2InstanceWithSecurityGroupSample: Create an Amazon EC2 instance running the Amazon Linux AMI. The AMI is chosen based on the region in which the stack is run. This example creates an EC2 security group for the instance to give you SSH access. **WARNING** This template creates an Amazon EC2 instance. You will be billed for the AWS resources used if you create a stack from this template.",
"Parameters" : {
"KeyName": {
"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."
},
"InstanceType" : {
"Description" : "WebServer EC2 instance type",
"Type" : "String",
"Default" : "t2.small",
"AllowedValues" : [ "t1.micro", "t2.nano", "t2.micro", "t2.small", "t2.medium", "t2.large", "m1.small", "m1.medium", "m1.large", "m1.xlarge", "m2.xlarge", "m2.2xlarge", "m2.4xlarge", "m3.medium", "m3.large", "m3.xlarge", "m3.2xlarge", "m4.large", "m4.xlarge", "m4.2xlarge", "m4.4xlarge", "m4.10xlarge", "c1.medium", "c1.xlarge", "c3.large", "c3.xlarge", "c3.2xlarge", "c3.4xlarge", "c3.8xlarge", "c4.large", "c4.xlarge", "c4.2xlarge", "c4.4xlarge", "c4.8xlarge", "g2.2xlarge", "g2.8xlarge", "r3.large", "r3.xlarge", "r3.2xlarge", "r3.4xlarge", "r3.8xlarge", "i2.xlarge", "i2.2xlarge", "i2.4xlarge", "i2.8xlarge", "d2.xlarge", "d2.2xlarge", "d2.4xlarge", "d2.8xlarge", "hi1.4xlarge", "hs1.8xlarge", "cr1.8xlarge", "cc2.8xlarge", "cg1.4xlarge"]
,
"ConstraintDescription" : "must be a valid EC2 instance type."
},
"SSHLocation" : {
"Description" : "The IP address range that can be used to SSH to the EC2 instances",
"Type": "String",
"MinLength": "9",
"MaxLength": "18",
"Default": "0.0.0.0/0",
"AllowedPattern": "(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})/(\\d{1,2})",
"ConstraintDescription": "must be a valid IP CIDR range of the form x.x.x.x/x."
}
},
"Mappings" : {
"AWSInstanceType2Arch" : {
"t1.micro" : { "Arch" : "HVM64" },
"t2.nano" : { "Arch" : "HVM64" },
"t2.micro" : { "Arch" : "HVM64" },
"t2.small" : { "Arch" : "HVM64" },
"t2.medium" : { "Arch" : "HVM64" },
"t2.large" : { "Arch" : "HVM64" },
"m1.small" : { "Arch" : "HVM64" },
"m1.medium" : { "Arch" : "HVM64" },
"m1.large" : { "Arch" : "HVM64" },
"m1.xlarge" : { "Arch" : "HVM64" },
"m2.xlarge" : { "Arch" : "HVM64" },
"m2.2xlarge" : { "Arch" : "HVM64" },
"m2.4xlarge" : { "Arch" : "HVM64" },
"m3.medium" : { "Arch" : "HVM64" },
"m3.large" : { "Arch" : "HVM64" },
"m3.xlarge" : { "Arch" : "HVM64" },
"m3.2xlarge" : { "Arch" : "HVM64" },
"m4.large" : { "Arch" : "HVM64" },
"m4.xlarge" : { "Arch" : "HVM64" },
"m4.2xlarge" : { "Arch" : "HVM64" },
"m4.4xlarge" : { "Arch" : "HVM64" },
"m4.10xlarge" : { "Arch" : "HVM64" },
"c1.medium" : { "Arch" : "HVM64" },
"c1.xlarge" : { "Arch" : "HVM64" },
"c3.large" : { "Arch" : "HVM64" },
"c3.xlarge" : { "Arch" : "HVM64" },
"c3.2xlarge" : { "Arch" : "HVM64" },
"c3.4xlarge" : { "Arch" : "HVM64" },
"c3.8xlarge" : { "Arch" : "HVM64" },
"c4.large" : { "Arch" : "HVM64" },
"c4.xlarge" : { "Arch" : "HVM64" },
"c4.2xlarge" : { "Arch" : "HVM64" },
"c4.4xlarge" : { "Arch" : "HVM64" },
"c4.8xlarge" : { "Arch" : "HVM64" },
"g2.2xlarge" : { "Arch" : "HVMG2" },
"g2.8xlarge" : { "Arch" : "HVMG2" },
"r3.large" : { "Arch" : "HVM64" },
"r3.xlarge" : { "Arch" : "HVM64" },
"r3.2xlarge" : { "Arch" : "HVM64" },
"r3.4xlarge" : { "Arch" : "HVM64" },
"r3.8xlarge" : { "Arch" : "HVM64" },
"i2.xlarge" : { "Arch" : "HVM64" },
"i2.2xlarge" : { "Arch" : "HVM64" },
"i2.4xlarge" : { "Arch" : "HVM64" },
"i2.8xlarge" : { "Arch" : "HVM64" },
"d2.xlarge" : { "Arch" : "HVM64" },
"d2.2xlarge" : { "Arch" : "HVM64" },
"d2.4xlarge" : { "Arch" : "HVM64" },
"d2.8xlarge" : { "Arch" : "HVM64" },
"hi1.4xlarge" : { "Arch" : "HVM64" },
"hs1.8xlarge" : { "Arch" : "HVM64" },
"cr1.8xlarge" : { "Arch" : "HVM64" },
"cc2.8xlarge" : { "Arch" : "HVM64" }
},
"AWSInstanceType2NATArch" : {
"t1.micro" : { "Arch" : "NATHVM64" },
"t2.nano" : { "Arch" : "NATHVM64" },
"t2.micro" : { "Arch" : "NATHVM64" },
"t2.small" : { "Arch" : "NATHVM64" },
"t2.medium" : { "Arch" : "NATHVM64" },
"t2.large" : { "Arch" : "NATHVM64" },
"m1.small" : { "Arch" : "NATHVM64" },
"m1.medium" : { "Arch" : "NATHVM64" },
"m1.large" : { "Arch" : "NATHVM64" },
"m1.xlarge" : { "Arch" : "NATHVM64" },
"m2.xlarge" : { "Arch" : "NATHVM64" },
"m2.2xlarge" : { "Arch" : "NATHVM64" },
"m2.4xlarge" : { "Arch" : "NATHVM64" },
"m3.medium" : { "Arch" : "NATHVM64" },
"m3.large" : { "Arch" : "NATHVM64" },
"m3.xlarge" : { "Arch" : "NATHVM64" },
"m3.2xlarge" : { "Arch" : "NATHVM64" },
"m4.large" : { "Arch" : "NATHVM64" },
"m4.xlarge" : { "Arch" : "NATHVM64" },
"m4.2xlarge" : { "Arch" : "NATHVM64" },
"m4.4xlarge" : { "Arch" : "NATHVM64" },
"m4.10xlarge" : { "Arch" : "NATHVM64" },
"c1.medium" : { "Arch" : "NATHVM64" },
"c1.xlarge" : { "Arch" : "NATHVM64" },
"c3.large" : { "Arch" : "NATHVM64" },
"c3.xlarge" : { "Arch" : "NATHVM64" },
"c3.2xlarge" : { "Arch" : "NATHVM64" },
"c3.4xlarge" : { "Arch" : "NATHVM64" },
"c3.8xlarge" : { "Arch" : "NATHVM64" },
"c4.large" : { "Arch" : "NATHVM64" },
"c4.xlarge" : { "Arch" : "NATHVM64" },
"c4.2xlarge" : { "Arch" : "NATHVM64" },
"c4.4xlarge" : { "Arch" : "NATHVM64" },
"c4.8xlarge" : { "Arch" : "NATHVM64" },
"g2.2xlarge" : { "Arch" : "NATHVMG2" },
"g2.8xlarge" : { "Arch" : "NATHVMG2" },
"r3.large" : { "Arch" : "NATHVM64" },
"r3.xlarge" : { "Arch" : "NATHVM64" },
"r3.2xlarge" : { "Arch" : "NATHVM64" },
"r3.4xlarge" : { "Arch" : "NATHVM64" },
"r3.8xlarge" : { "Arch" : "NATHVM64" },
"i2.xlarge" : { "Arch" : "NATHVM64" },
"i2.2xlarge" : { "Arch" : "NATHVM64" },
"i2.4xlarge" : { "Arch" : "NATHVM64" },
"i2.8xlarge" : { "Arch" : "NATHVM64" },
"d2.xlarge" : { "Arch" : "NATHVM64" },
"d2.2xlarge" : { "Arch" : "NATHVM64" },
"d2.4xlarge" : { "Arch" : "NATHVM64" },
"d2.8xlarge" : { "Arch" : "NATHVM64" },
"hi1.4xlarge" : { "Arch" : "NATHVM64" },
"hs1.8xlarge" : { "Arch" : "NATHVM64" },
"cr1.8xlarge" : { "Arch" : "NATHVM64" },
"cc2.8xlarge" : { "Arch" : "NATHVM64" }
}
,
"AWSRegionArch2AMI" : {
"us-east-1" : {"HVM64" : "ami-0080e4c5bc078760e", "HVMG2" : "ami-0aeb704d503081ea6"},
"us-west-2" : {"HVM64" : "ami-01e24be29428c15b2", "HVMG2" : "ami-0fe84a5b4563d8f27"},
"us-west-1" : {"HVM64" : "ami-0ec6517f6edbf8044", "HVMG2" : "ami-0a7fc72dc0e51aa77"},
"eu-west-1" : {"HVM64" : "ami-08935252a36e25f85", "HVMG2" : "ami-0d5299b1c6112c3c7"},
"eu-west-2" : {"HVM64" : "ami-01419b804382064e4", "HVMG2" : "NOT_SUPPORTED"},
"eu-west-3" : {"HVM64" : "ami-0dd7e7ed60da8fb83", "HVMG2" : "NOT_SUPPORTED"},
"eu-central-1" : {"HVM64" : "ami-0cfbf4f6db41068ac", "HVMG2" : "ami-0aa1822e3eb913a11"},
"eu-north-1" : {"HVM64" : "ami-86fe70f8", "HVMG2" : "ami-32d55b4c"},
"ap-northeast-1" : {"HVM64" : "ami-00a5245b4816c38e6", "HVMG2" : "ami-09d0e0e099ecabba2"},
"ap-northeast-2" : {"HVM64" : "ami-00dc207f8ba6dc919", "HVMG2" : "NOT_SUPPORTED"},
"ap-northeast-3" : {"HVM64" : "ami-0b65f69a5c11f3522", "HVMG2" : "NOT_SUPPORTED"},
"ap-southeast-1" : {"HVM64" : "ami-05b3bcf7f311194b3", "HVMG2" : "ami-0e46ce0d6a87dc979"},
"ap-southeast-2" : {"HVM64" : "ami-02fd0b06f06d93dfc", "HVMG2" : "ami-0c0ab057a101d8ff2"},
"ap-south-1" : {"HVM64" : "ami-0ad42f4f66f6c1cc9", "HVMG2" : "ami-0244c1d42815af84a"},
"us-east-2" : {"HVM64" : "ami-0cd3dfa4e37921605", "HVMG2" : "NOT_SUPPORTED"},
"ca-central-1" : {"HVM64" : "ami-07423fb63ea0a0930", "HVMG2" : "NOT_SUPPORTED"},
"sa-east-1" : {"HVM64" : "ami-05145e0b28ad8e0b2", "HVMG2" : "NOT_SUPPORTED"},
"cn-north-1" : {"HVM64" : "ami-053617c9d818c1189", "HVMG2" : "NOT_SUPPORTED"},
"cn-northwest-1" : {"HVM64" : "ami-0f7937761741dc640", "HVMG2" : "NOT_SUPPORTED"}
}
},
"Resources" : {
"EC2Instance" : {
"Type" : "AWS::EC2::Instance",
"Properties" : {
"InstanceType" : { "Ref" : "InstanceType" },
"SecurityGroups" : [ { "Ref" : "InstanceSecurityGroup" } ],
"KeyName" : { "Ref" : "KeyName" },
"ImageId" : { "Fn::FindInMap" : [ "AWSRegionArch2AMI", { "Ref" : "AWS::Region" },
{ "Fn::FindInMap" : [ "AWSInstanceType2Arch", { "Ref" : "InstanceType" }, "Arch" ] } ] }
}
},
"InstanceSecurityGroup" : {
"Type" : "AWS::EC2::SecurityGroup",
"Properties" : {
"GroupDescription" : "Enable SSH access via port 22",
"SecurityGroupIngress" : [ {
"IpProtocol" : "tcp",
"FromPort" : "22",
"ToPort" : "22",
"CidrIp" : { "Ref" : "SSHLocation"}
} ]
}
}
},
"Outputs" : {
"InstanceId" : {
"Description" : "InstanceId of the newly created EC2 instance",
"Value" : { "Ref" : "EC2Instance" }
},
"AZ" : {
"Description" : "Availability Zone of the newly created EC2 instance",
"Value" : { "Fn::GetAtt" : [ "EC2Instance", "AvailabilityZone" ] }
},
"PublicDNS" : {
"Description" : "Public DNSName of the newly created EC2 instance",
"Value" : { "Fn::GetAtt" : [ "EC2Instance", "PublicDnsName" ] }
},
"PublicIP" : {
"Description" : "Public IP address of the newly created EC2 instance",
"Value" : { "Fn::GetAtt" : [ "EC2Instance", "PublicIp" ] }
}
}
} 首先在AWS System Manager裡面的Parameter Store裡面建立兩個參數
這兩個參數都是string類型，devinstance 我定義為 t2.micro; prodinstance我定義為 t3.micro
然後我們可以在模闆檔案的parameters 部分，通過 "AWS::SSM::Parameter::Value<String>" 這種方式來直接調用參數，這裡我設定了一個預設值
執行看看
1分鐘左右就建立好了
可以看見EC2的類型和我定義的參數是一緻的
例2 在Resource部分調用Parameter Store的參數
同樣的，我們做一個對照性的修改。這個是原始的模闆，建立一個publicread 的S3 Bucket。ACL權限是寫死的，我們把他改成parameter store的參數
AWSTemplateFormatVersion: 2010-09-09
Description: >-
AWS CloudFormation Sample Template S3_Website_Bucket_With_Retain_On_Delete:
Sample template showing how to create a publicly accessible S3 bucket
configured for website access with a deletion policy of retail on delete.
**WARNING** This template creates an S3 bucket that will NOT be deleted when
the stack is deleted. You will be billed for the AWS resources used if you
create a stack from this template.
Resources:
S3Bucket:
Type: 'AWS::S3::Bucket'
Properties:
AccessControl: PublicRead
WebsiteConfiguration:
IndexDocument: index.html
ErrorDocument: error.html
DeletionPolicy: Retain
Outputs:
WebsiteURL:
Value: !GetAtt
- S3Bucket
- WebsiteURL
Description: URL for website hosted on S3
S3BucketSecureURL:
Value: !Join
- ''
- - 'https://'
- !GetAtt
- S3Bucket
- DomainName
Description: Name of S3 bucket to hold website content 先定義一個參數
新的參數S3Access
然後在我們的模闆檔案裡面，這次我們需要在Resource部分調用，這裡需要使用另外一個方式調用 resolve:ssm:S3Access:1