json - CloudFormation AWS::EC2::Instance 指定实例数量

Question

AWS::EC2::Instance 下的 json 模板中是否可以指定实例数量？

Answer 1

您可以使用固定大小的自动缩放组:

"MyFixedSizeGroup":{
        "Type":"AWS::AutoScaling::AutoScalingGroup",
        "Properties":{
            "LaunchConfigurationName":{"Ref":"GlobalWorkersSmallLaunchConf"},
            "AvailabilityZones" : [ "us-east-1a" ],
            "MinSize":"4",
            "MaxSize":"4",
            "DesiredCapacity":"4",
            "Tags":[{"Key":"Name", "Value":"worker instance", "PropagateAtLaunch":"true"}]          
        }           
}

以及所需的启动配置，例如:

"GlobalWorkersSmallLaunchConf":{
        "Type":"AWS::AutoScaling::LaunchConfiguration",
        "Properties":{"KeyName":{"Ref":"MyKeyName"},
                      "ImageId":"ami-SomeAmi",
                      "UserData":{"Fn::Base64":{"Fn::Join":["",[{"Ref":"SomeInitScript"}]]}},
                      "SecurityGroups":[{"Ref":"InstanceSecurityGroup"}],
                      "InstanceType":"m1.small",
                      "InstanceMonitoring":"false"
        }           
}

顺便说一句 - 直到上周才可以通过仪表板使用此功能。