3
我有一個Elastic Load Balancer已經配置了端口和SSL證書等，Route 53設置爲將我的網站流量路由到它。創建autoscaling網絡服務器組添加到現有elb
我想知道是否有一個示例cloudFormation模板創建一個ec2實例的自動縮放組，其中每個實例都添加到現有的負載均衡器中並從中移除。
我在網上查了一些例子 - 下面的例子似乎幾乎是我所需要的，但是它的問題（以及所有其他似乎使用這種變體的問題）是它假設你想創建一個新的負載平衡器。我不。
是否有可能，做我的建議？有人有一個例子嗎？
我的CloudFormation腳本如下所示（我刪除了實際的服務器軟件包配置部分）。這成功創建了一個新實例，但它不會添加到負載平衡器「load4」。我可以手動將主機添加到負載平衡器，但這顯然會失敗。
{
"AWSTemplateFormatVersion" : "2010-09-09",
"Description" : "Create an Auto-scaling group that will attach to existing load balancer and inhereit existing security groups.",
"Parameters" : {
"KeyName" : {
"Description" : "mykeyname",
"Type" : "String"
},
"InstanceType" : {
"Type" : "String",
"Default" : "m1.small",
"AllowedValues" : [ "m1.small", "m1.medium", "m1.large", "m1.xlarge", "m2.xlarge", "m2.2xlarge", "m2.4xlarge", "c1.xlarge", "cc1.4xlarge" ],
"Description" : "EC2 instance type (e.g. m1.large, m1.xlarge, m2.xlarge)"
},
"SpotPrice": {
"Description": "Spot price for application AutoScaling Group",
"Type": "Number",
"MinValue" : ".03"
},
"MinInstances" : {
"Description" : "The minimum number of Workers",
"Type" : "Number",
"MinValue" : "0",
"Default" : "0",
"ConstraintDescription" : "Enter a number >=0"
},
"MaxInstances" : {
"Description" : "The maximum number of Workers",
"Type" : "Number",
"MinValue" : "1",
"Default" : "4",
"ConstraintDescription" : "Enter a number >1"
},
"OperatorEmail": {
"Description": "Email address to notify if there are any scaling operations",
"Type": "String"
}
},
"Mappings" : {
"AWSInstanceType2Arch" : {
"t1.micro" : { "Arch" : "64" },
"m1.small" : { "Arch" : "64" },
"m1.medium" : { "Arch" : "64" },
"m1.large" : { "Arch" : "64" },
"m1.xlarge" : { "Arch" : "64" },
"m2.xlarge" : { "Arch" : "64" },
"m2.2xlarge" : { "Arch" : "64" },
"m2.4xlarge" : { "Arch" : "64" },
"m3.xlarge" : { "Arch" : "64" },
"m3.2xlarge" : { "Arch" : "64" },
"c1.medium" : { "Arch" : "64" },
"c1.xlarge" : { "Arch" : "64" },
"cc1.4xlarge" : { "Arch" : "64HVM" },
"cc2.8xlarge" : { "Arch" : "64HVM" },
"cg1.4xlarge" : { "Arch" : "64HVM" }
},
"AWSRegionArch2AMI" : {
"us-east-1" : { "32" : "ami-31814f58", "64" : "ami-1b814f72", "64HVM" : "ami-0da96764" },
"us-west-2" : { "32" : "ami-38fe7308", "64" : "ami-30fe7300", "64HVM" : "NOT_YET_SUPPORTED" },
"us-west-1" : { "32" : "ami-11d68a54", "64" : "ami-1bd68a5e", "64HVM" : "NOT_YET_SUPPORTED" },
"eu-west-1" : { "32" : "ami-973b06e3", "64" : "ami-953b06e1", "64HVM" : "NOT_YET_SUPPORTED" },
"ap-southeast-1" : { "32" : "ami-b4b0cae6", "64" : "ami-beb0caec", "64HVM" : "NOT_YET_SUPPORTED" },
"ap-southeast-2" : { "32" : "ami-b3990e89", "64" : "ami-bd990e87", "64HVM" : "NOT_YET_SUPPORTED" },
"ap-northeast-1" : { "32" : "ami-0644f007", "64" : "ami-0a44f00b", "64HVM" : "NOT_YET_SUPPORTED" },
"sa-east-1" : { "32" : "ami-3e3be423", "64" : "ami-3c3be421", "64HVM" : "NOT_YET_SUPPORTED" }
}
},
"Resources" : {
"NotificationTopic": {
"Type": "AWS::SNS::Topic",
"Properties": {
"Subscription": [ {
"Endpoint": { "Ref": "OperatorEmail" },
"Protocol": "email" } ]
}
},
"WebServerGroup" : {
"Type" : "AWS::AutoScaling::AutoScalingGroup",
"Properties" : {
"AvailabilityZones" : { "Fn::GetAZs" : ""},
"LaunchConfigurationName" : { "Ref" : "LaunchConfig" },
"MinSize" : "0",
"MaxSize" : "4",
"LoadBalancerNames" : [ "load4" ],
"NotificationConfiguration" : {
"TopicARN" : { "Ref" : "NotificationTopic" },
"NotificationTypes" : [ "autoscaling:EC2_INSTANCE_LAUNCH","autoscaling:EC2_INSTANCE_LAUNCH_ERROR","autoscaling:EC2_INSTANCE_TERMINATE", "autoscaling:EC2_INSTANCE_TERMINATE_ERROR"]
}
}
},
"CfnUser" : {
"Type" : "AWS::IAM::User",
"Properties" : {
"Path": "/",
"Policies": [ {
"PolicyName": "root",
"PolicyDocument": { "Statement": [ {
"Effect":"Allow",
"Action":"cloudformation:DescribeStackResource",
"Resource":"*"
} ] }
} ]
}
},
"HostKeys" : {
"Type" : "AWS::IAM::AccessKey",
"Properties" : {
"UserName" : { "Ref" : "CfnUser" }
}
},
"LaunchConfig" : {
"Type" : "AWS::AutoScaling::LaunchConfiguration",
"Metadata" : {
"Comment" : "Create a single webserver",
"AWS::CloudFormation::Init" : {
"config" : {
"packages" : {
"yum" : {
}
},
"files" : {
}
}
}
},
"Properties" : {
"KeyName" : { "Ref" : "KeyName" },
"SpotPrice" : { "Ref" : "SpotPrice" },
"ImageId" : { "Fn::FindInMap" : [ "AWSRegionArch2AMI", { "Ref" : "AWS::Region" },
{ "Fn::FindInMap" : [ "AWSInstanceType2Arch", { "Ref" : "InstanceType" },
"Arch" ] } ] },
"SecurityGroups" : [ "webserver" ],
"InstanceType" : { "Ref" : "InstanceType" },
"UserData" : { "Fn::Base64" : { "Fn::Join" : ["", [
"#!/bin/bash\n",
"yum update -y aws-cfn-bootstrap\n",
"# Install the Worker application\n",
"/opt/aws/bin/cfn-init ",
" --stack ", { "Ref" : "AWS::StackId" },
" --resource LaunchConfig ",
" --configset ALL",
" --region ", { "Ref" : "AWS::Region" }, "\n"
]]}}
}
},
"WorkerGroup" : {
"Type" : "AWS::AutoScaling::AutoScalingGroup",
"Properties" : {
"AvailabilityZones" : { "Fn::GetAZs" : ""},
"LaunchConfigurationName" : { "Ref" : "LaunchConfig" },
"MinSize" : { "Ref" : "MinInstances" },
"MaxSize" : { "Ref" : "MaxInstances" }
}
},
"WebServerScaleUpPolicy" : {
"Type" : "AWS::AutoScaling::ScalingPolicy",
"Properties" : {
"AdjustmentType" : "ChangeInCapacity",
"AutoScalingGroupName" : { "Ref" : "WorkerGroup" },
"Cooldown" : "60",
"ScalingAdjustment" : "1"
}
},
"WebServerScaleDownPolicy" : {
"Type" : "AWS::AutoScaling::ScalingPolicy",
"Properties" : {
"AdjustmentType" : "ChangeInCapacity",
"AutoScalingGroupName" : { "Ref" : "WorkerGroup" },
"Cooldown" : "60",
"ScalingAdjustment" : "-1"
}
}, ...
"WorkerThreadHigh": {
"Type": "AWS::CloudWatch::Alarm",
"Properties": {
"AlarmDescription": "Scale-up if Worker Thread Vs. Idle Percent > 80% for 10min",
"MetricName": "PctActiveWorkers",
"Namespace": "EC2",
"Statistic": "Average",
"Period": "300",
"EvaluationPeriods": "2",
"Threshold": "80",
"AlarmActions": [ { "Ref": "WebServerScaleUpPolicy" } ],
"Dimensions": [
{
"Name": "AutoScalingGroupName",
"Value": { "Ref": "WebServerGroup" }
}
],
"ComparisonOperator": "GreaterThanThreshold"
}
},
"WorkerThreadLow": {
"Type": "AWS::CloudWatch::Alarm",
"Properties": {
"AlarmDescription": "Scale-down if CPU < 50% for 10 minutes",
"MetricName": "PctActiveWorkers",
"Namespace": "EC2",
"Statistic": "Average",
"Period": "300",
"EvaluationPeriods": "2",
"Threshold": "50",
"AlarmActions": [ { "Ref": "WebServerScaleDownPolicy" } ],
"Dimensions": [
{
"Name": "AutoScalingGroupName",
"Value": { "Ref": "WebServerGroup" }
}
],
"ComparisonOperator": "LessThanThreshold"
}
}
}
}
jeez，如果它確實真的吸吮！爲了防止別人可能有衝突的答案或其他漂亮的解決方法，我會在開放之前留出一段時間。謝謝。 – Ross
我想現在我能想到的最佳解決方法是使用外部監視機制（腳本）來輪詢cloudwatch指標或一組指標，並添加/刪除instacnes以取代自動縮放的cloudformation ...不完全理想！ – Ross
這不再是事實。您可以使用LoadBalancerNames屬性（我剛剛驗證過）將實例添加到現有ELB中 - 請參閱@steffenopel。 – Rilindo