aws(学习笔记第十六课) 使用负载均衡器(ELB)解耦webserver以及输出ELB的日志到S3

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已于 2024-12-08 22:16:10 修改

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分类专栏： aws 文章标签： aws 学习笔记

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aws(学习笔记第十六课)

使用负载均衡器(ELB)以及输出ELB的日志到S3

学习内容：

使用负载均衡器(ELB)解耦web server
输出ELB的日志到S3

1. 使用负载均衡器(`ELB`)

全体架构
使用ELB(Elastic Load Balancer)能够解耦外部internet访问和web server之间的耦合，让外部internet访问只能认识ELB，只知道是ELB为它服务，但是具体的web server对于外部来说却是不意识的。

在这里插入图片描述
2. 代码解析

全体代码

{
     
	"AWSTemplateFormatVersion": "2010-09-09",
	"Description": "AWS in Action: chapter 12 (Load Balancer)",
	"Parameters": {
     
		"KeyName": {
     
			"Description": "Key Pair name",
			"Type": "AWS::EC2::KeyPair::KeyName",
			"Default": "my-cli-key"
		},
		"NumberOfServers": {
     
			"Description": "Number of servers",
			"Type": "Number",
			"Default": "2",
			"MinValue": "2",
			"MaxValue": "4"
		}
	},
	"Mappings": {
     
		"EC2RegionMap": {
     
			"ap-northeast-1": {
     "AmazonLinuxAMIHVMEBSBacked64bit": "ami-cbf90ecb"},
			"ap-southeast-1": {
     "AmazonLinuxAMIHVMEBSBacked64bit": "ami-68d8e93a"},
			"ap-southeast-2": {
     "AmazonLinuxAMIHVMEBSBacked64bit": "ami-fd9cecc7"},
			"eu-central-1": {
     "AmazonLinuxAMIHVMEBSBacked64bit": "ami-a8221fb5"},
			"eu-west-1": {
     "AmazonLinuxAMIHVMEBSBacked64bit": "ami-a10897d6"},
			"sa-east-1": {
     "AmazonLinuxAMIHVMEBSBacked64bit": "ami-b52890a8"},
			"us-east-1": {
     "AmazonLinuxAMIHVMEBSBacked64bit": "ami-1ecae776"},
			"us-west-1": {
     "AmazonLinuxAMIHVMEBSBacked64bit": "ami-d114f295"},
			"us-west-2": {
     "AmazonLinuxAMIHVMEBSBacked64bit": "ami-e7527ed7"}
		}
	},
	"Resources": {
     
		"VPC": {
     
			"Type": "AWS::EC2::VPC",
			"Properties": {
     
				"CidrBlock": "172.31.0.0/16",
				"EnableDnsHostnames": "true"
			}
		},
		"InternetGateway": {
     
			"Type": "AWS::EC2::InternetGateway",
			"Properties": {
     
			}
		},
		"VPCGatewayAttachment": {
     
			"Type": "AWS::EC2::VPCGatewayAttachment",
			"Properties": {
     
				"VpcId": {
     "Ref": "VPC"},
				"InternetGatewayId": {
     "Ref": "InternetGateway"}
			}
		},
		"Subnet": {
     
			"Type": "AWS::EC2::Subnet",
			"Properties": {
     
				"AvailabilityZone": {
     "Fn::Select": ["0", {
     "Fn::GetAZs": ""}]},
				"CidrBlock": "172.31.38.0/24",
				"VpcId": {
     "Ref": "VPC"}
			}
		},
		"RouteTable": {
     
			"Type": "AWS::EC2::RouteTable",