当前位置: 首页 > news >正文

aws(学习笔记第十五课) 如何从灾难中恢复(recover)

aws(学习笔记第十五课)

  • 如何从灾难中恢复

学习内容:

  • 使用CloudWatch对服务器进行监视与恢复
  • 区域(region),可用区(available zone)和子网(subnet)
  • 使用自动扩展(AutoScalingGroup)

1. 使用CloudWatch对服务器进行监视与恢复

  1. 整体架构
    这里模拟Jenkins Server在灾难时候,可以由AWS Cloudwatch Alarm监视到,之后将其recover
    在这里,elastic ip定义了,并且将其指向了Jenkins Server。为什么平时没有使用elastic ip,这里特意使用它呢。
    因为默认如果让AWS自动配置给ec2internet ip,都是临时的ip,每次ec2实例重启了之后,都会重新分配ip。但是作为Jenkins Server来使用,并且一旦从灾难中recover之后,ip address变化的话,运用起来将会特别不方便。

在这里插入图片描述
2. 代码解析

  • 代码
    {"AWSTemplateFormatVersion": "2010-09-09","Description": " (Jenkins (CI server) running on EC2 with AWS CloudWatch recovery)","Parameters": {"KeyName": {"Description": "Key Pair name","Type": "AWS::EC2::KeyPair::KeyName","Default": "my-cli-key"},"JenkinsAdminPassword": {"Description": "Password for Jenkins admin user","Type": "String","AllowedPattern" : "[a-zA-Z0-9]*","MinLength" : "8","MaxLength" : "42"}},"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": {"EnableDnsSupport": "true","EnableDnsHostnames": "true","CidrBlock": "10.0.0.0/16","Tags": [{"Key": "Name","Value": "jenkins-recovery"}]}},"Subnet": {"Type": "AWS::EC2::Subnet","Properties": {"VpcId": {"Ref": "VPC"},"AvailabilityZone": {"Fn::Select": ["0", {"Fn::GetAZs": ""}]},"CidrBlock": "10.0.0.0/24","Tags": [{"Key": "Name","Value": "jenkins-recovery"}]}},"InternetGateway": {"Type": "AWS::EC2::InternetGateway","Properties": {"Tags": [{"Key": "Name","Value": "jenkins-recovery"}]}},"GatewayToInternet": {"Type": "AWS::EC2::VPCGatewayAttachment","Properties": {"VpcId": {"Ref": "VPC"},"InternetGatewayId": {"Ref": "InternetGateway"}}},"RouteTable": {"Type": "AWS::EC2::RouteTable","Properties": {"VpcId": {"Ref": "VPC"},"Tags": [{"Key": "Name","Value": "jenkins-recovery"}]}},"InternetRoute": {"Type": "AWS::EC2::Route","Properties": {"RouteTableId": {"Ref": "RouteTable"},"DestinationCidrBlock": "0.0.0.0/0","GatewayId": {"Ref": "InternetGateway"}},"DependsOn": "GatewayToInternet"			},"RouteTableAssociation": {"Type": "AWS::EC2::SubnetRouteTableAssociation","Properties": {"SubnetId": {"Ref": "Subnet"},"RouteTableId": {"Ref": "RouteTable"}}},"NetworkAcl": {"Type": "AWS::EC2::NetworkAcl","Properties": {"VpcId": {"Ref": "VPC"},"Tags": [{"Key": "Name","Value": "jenkins-recovery"}]}},"NetworkAceSSH": {"Type": "AWS::EC2::NetworkAclEntry","Properties": {"NetworkAclId": {"Ref": "NetworkAcl"},"RuleNumber": "10","Protocol": "6","RuleAction": "allow","Egress": "false","CidrBlock": "0.0.0.0/0","PortRange": {"From": "22","To": "22"}}},"NetworkAceJenkinsHTTP": {"Type": "AWS::EC2::NetworkAclEntry","Properties": {"NetworkAclId": {"Ref": "NetworkAcl"},"RuleNumber": "11","Protocol": "6","RuleAction": "allow","Egress": "false","CidrBlock": "0.0.0.0/0","PortRange": {"From": "8080","To": "8080"}}},"NetworkAceNTP": {"Type": "AWS::EC2::NetworkAclEntry","Properties": {"NetworkAclId": {"Ref": "NetworkAcl"},"RuleNumber": "20","Protocol": "17","RuleAction": "allow","Egress": "false","CidrBlock": "0.0.0.0/0","PortRange": {"From": "123","To": "123"}}},"NetworkAceICMP": {"Type": "AWS::EC2::NetworkAclEntry","Properties": {"NetworkAclId": {"Ref": "NetworkAcl"},"RuleNumber": "30","Protocol": "1","RuleAction": "allow","Egress": "false","CidrBlock": "0.0.0.0/0","Icmp": {"Code": "-1","Type": "-1"}}},"NetworkAceHighPortsTCP": {"Type": "AWS::EC2::NetworkAclEntry","Properties": {"NetworkAclId": {"Ref": "NetworkAcl"},"RuleNumber": "40","Protocol": "6","RuleAction": "allow","Egress": "false","CidrBlock": "0.0.0.0/0","PortRange": {"From": "1024","To": "65535"}}},"NetworkAceHighPortsUDP": {"Type": "AWS::EC2::NetworkAclEntry","Properties": {"NetworkAclId": {"Ref": "NetworkAcl"},"RuleNumber": "41","Protocol": "17","RuleAction": "allow","Egress": "false","CidrBlock": "0.0.0.0/0","PortRange": {"From": "1024","To": "65535"}}},"NetworkAceEgress": {"Type": "AWS::EC2::NetworkAclEntry","Properties": {"NetworkAclId": {"Ref": "NetworkAcl"},"RuleNumber": "10","Protocol": "-1","RuleAction": "allow","Egress": "true","CidrBlock": "0.0.0.0/0","PortRange": {"From": "0","To": "65535"}}},"NetworkAclAssociation": {"Type": "AWS::EC2::SubnetNetworkAclAssociation","Properties": {"SubnetId": {"Ref": "Subnet"},"NetworkAclId": {"Ref": "NetworkAcl"}}},"SecurityGroup": {"Type": "AWS::EC2::SecurityGroup","Properties": {"GroupDescription": "SecurityGroupforjenkins","VpcId": {"Ref": "VPC"},"Tags": [{"Key": "Name","Value": "jenkins-recovery"}],"SecurityGroupIngress": [{"IpProtocol": "tcp","FromPort": "22","ToPort": "22","CidrIp": "0.0.0.0/0"},{"IpProtocol": "tcp","FromPort": "8080","ToPort": "8080","CidrIp": "0.0.0.0/0"},{"IpProtocol": "icmp","FromPort": "-1","ToPort": "-1","CidrIp": "0.0.0.0/0"}]}},"ElasticIP": {"Type": "AWS::EC2::EIP","Properties": {"InstanceId": {"Ref": "Server"},"Domain": "vpc"},"DependsOn": "GatewayToInternet"},"Server": {"Type": "AWS::EC2::Instance","Properties": {"ImageId": {"Fn::FindInMap": ["EC2RegionMap", {"Ref": "AWS::Region"}, "AmazonLinuxAMIHVMEBSBacked64bit"]},"InstanceType": "t2.micro","KeyName": {"Ref": "KeyName"},"SecurityGroupIds": [{"Ref": "SecurityGroup"}],"SubnetId": {"Ref": "Subnet"},"UserData": {"Fn::Base64": {"Fn::Join": ["", ["#!/bin/bash -ex\n","wget http://pkg.jenkins-ci.org/redhat/jenkins-1.616-1.1.noarch.rpm\n","rpm --install jenkins-1.616-1.1.noarch.rpm\n","sed -i -e 's/JENKINS_ARGS=\\\"\\\"/JENKINS_ARGS=\\\"--argumentsRealm.passwd.admin=", {"Ref": "JenkinsAdminPassword"}, " --argumentsRealm.roles.admin=admin\\\"/g' /etc/sysconfig/jenkins\n","echo \"<?xml version='1.0' encoding='UTF-8'?><hudson><version>1.0</version><useSecurity>true</useSecurity><authorizationStrategy class=\\\"hudson.security.FullControlOnceLoggedInAuthorizationStrategy\\\"/><securityRealm class=\\\"hudson.security.LegacySecurityRealm\\\"/></hudson>\" > /var/lib/jenkins/config.xml\n","service jenkins start\n"]]}},"Tags": [{"Key": "Name","Value": "jenkins-recovery"}]},"DependsOn": "GatewayToInternet"},"RecoveryAlarm": {"Type": "AWS::CloudWatch::Alarm","Properties": {"AlarmDescription": "Recover server when underlying hardware fails.","Namespace": "AWS/EC2" ,"MetricName": "StatusCheckFailed_System","Statistic": "Minimum","Period": "60","EvaluationPeriods": "5","ComparisonOperator": "GreaterThanThreshold","Threshold": "0","AlarmActions": [{"Fn::Join": ["", ["arn:aws:automate:", { "Ref": "AWS::Region"}, ":ec2:recover"]]}],"Dimensions": [{"Name": "InstanceId", "Value": {"Ref": "Server"}}]}}},"Outputs": {"JenkinsURL": {"Description": "URL to access web interface of Jenkins server.","Value": {"Fn::Join": ["", ["http://", {"Ref": "ElasticIP"}, ":8080"]]}},"User": {"Description": "Administrator user for Jenkins.","Value": "admin"},"Password": {"Description": "Password for Jenkins administrator user.","Value": {"Ref": "JenkinsAdminPassword"}}}
    }
    
  • 分析
    • 这里使用了AWS:CloudWatch:Alarm,如下所示。
      "RecoveryAlarm": {"Type": "AWS::CloudWatch::Alarm","Properties": {"AlarmDescription": "Recover server when underlying hardware fails.","Namespace": "AWS/EC2" ,"MetricName": "StatusCheckFailed_System","Statistic": "Minimum","Period": "60","EvaluationPeriods": "5","ComparisonOperator": "GreaterThanThreshold","Threshold": "0","AlarmActions": [{"Fn::Join": ["", ["arn:aws:automate:", { "Ref": "AWS::Region"}, ":ec2:recover"]]}],"Dimensions": [{"Name": "InstanceId", "Value": {"Ref": "Server"}}]}}
      
      这里,设置了AWS::CloudWatch::Alarm,每隔60秒检查下ec2的状态,如有ec2有问题,那么使用arn:aws:automate:进行在其他的Available Zone恢复,但是这里无法让ec2 server模拟出问题的场合,所以这里不能实际上让arn:aws:automate:ec2:recover发生。

2. 区域(region),可用区(available zone)和子网(subnet)

  1. 区域(region),可用区(available zone)
    • 一个区域(region)里面,包含多个可用区(available zone),每个可用区(available zone)有多个数据中心(DataCenter)。
    • 不同区域(region)的之间通过低延时的链路链接。可以想象,在同一个region的服务之前的网络延时会非常小。
      在这里插入图片描述
  2. 全球性的服务跨多个区域
    • 各种服务的不同区域
      在这里插入图片描述
  3. VPC,区域(region)以及子网(subnet
    • VPC一定会属于一个区域(region
    • 子网(subnet)一定属于一个可用区(Availibility Zone
      在这里插入图片描述

3. 使用自动扩展(AutoScalingGroup)

  1. 使用自动扩展(AutoScalingGroup),可以保证执行数量的虚拟服务器一直运行。

    • 代码
      {"AWSTemplateFormatVersion": "2010-09-09","Description": "(Jenkins (CI server) running with Auto Scaling Group over multiple AZs)","Parameters": {"KeyName": {"Description": "Key Pair name","Type": "AWS::EC2::KeyPair::KeyName","Default": "my-cli-key"},"JenkinsAdminPassword": {"Description": "Password for Jenkins admin user","Type": "String","AllowedPattern" : "[a-zA-Z0-9]*","MinLength" : "8","MaxLength" : "42"}},"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": {"EnableDnsSupport": "true","EnableDnsHostnames": "true","CidrBlock": "10.0.0.0/16","Tags": [{"Key": "Name","Value": "jenkins-multiaz"}]}},"SubnetA": {"Type": "AWS::EC2::Subnet","Properties": {"VpcId": {"Ref": "VPC"},"AvailabilityZone": {"Fn::Select": ["0", {"Fn::GetAZs": ""}]},"CidrBlock": "10.0.0.0/24","Tags": [{"Key": "Name","Value": "jenkins-multiaz"}]}},"SubnetB": {"Type": "AWS::EC2::Subnet","Properties": {"VpcId": {"Ref": "VPC"},"AvailabilityZone": {"Fn::Select": ["1", {"Fn::GetAZs": ""}]},"CidrBlock": "10.0.1.0/24","Tags": [{"Key": "Name","Value": "jenkins-multiaz"}]}},"InternetGateway": {"Type": "AWS::EC2::InternetGateway","Properties": {"Tags": [{"Key": "Name","Value": "jenkins-multiaz"}]}},"GatewayToInternet": {"Type": "AWS::EC2::VPCGatewayAttachment","Properties": {"VpcId": {"Ref": "VPC"},"InternetGatewayId": {"Ref": "InternetGateway"}}},"RouteTable": {"Type": "AWS::EC2::RouteTable","Properties": {"VpcId": {"Ref": "VPC"},"Tags": [{"Key": "Name","Value": "jenkins-multiaz"}]}},"InternetRoute": {"Type": "AWS::EC2::Route","Properties": {"RouteTableId": {"Ref": "RouteTable"},"DestinationCidrBlock": "0.0.0.0/0","GatewayId": {"Ref": "InternetGateway"}},"DependsOn": "GatewayToInternet"},"RouteTableAssociationA": {"Type": "AWS::EC2::SubnetRouteTableAssociation","Properties": {"SubnetId": {"Ref": "SubnetA"},"RouteTableId": {"Ref": "RouteTable"}}},"RouteTableAssociationB": {"Type": "AWS::EC2::SubnetRouteTableAssociation","Properties": {"SubnetId": {"Ref": "SubnetB"},"RouteTableId": {"Ref": "RouteTable"}}},"NetworkAcl": {"Type": "AWS::EC2::NetworkAcl","Properties": {"VpcId": {"Ref": "VPC"},"Tags": [{"Key": "Name","Value": "jenkins-multiaz"}]}},"NetworkAceSSH": {"Type": "AWS::EC2::NetworkAclEntry","Properties": {"NetworkAclId": {"Ref": "NetworkAcl"},"RuleNumber": "10","Protocol": "6","RuleAction": "allow","Egress": "false","CidrBlock": "0.0.0.0/0","PortRange": {"From": "22","To": "22"}}},"NetworkAceJenkinsHTTP": {"Type": "AWS::EC2::NetworkAclEntry","Properties": {"NetworkAclId": {"Ref": "NetworkAcl"},"RuleNumber": "11","Protocol": "6","RuleAction": "allow","Egress": "false","CidrBlock": "0.0.0.0/0","PortRange": {"From": "8080","To": "8080"}}},"NetworkAceNTP": {"Type": "AWS::EC2::NetworkAclEntry","Properties": {"NetworkAclId": {"Ref": "NetworkAcl"},"RuleNumber": "20","Protocol": "17","RuleAction": "allow","Egress": "false","CidrBlock": "0.0.0.0/0","PortRange": {"From": "123","To": "123"}}},"NetworkAceICMP": {"Type": "AWS::EC2::NetworkAclEntry","Properties": {"NetworkAclId": {"Ref": "NetworkAcl"},"RuleNumber": "30","Protocol": "1","RuleAction": "allow","Egress": "false","CidrBlock": "0.0.0.0/0","Icmp": {"Code": "-1","Type": "-1"}}},"NetworkAceHighPortsTCP": {"Type": "AWS::EC2::NetworkAclEntry","Properties": {"NetworkAclId": {"Ref": "NetworkAcl"},"RuleNumber": "40","Protocol": "6","RuleAction": "allow","Egress": "false","CidrBlock": "0.0.0.0/0","PortRange": {"From": "1024","To": "65535"}}},"NetworkAceHighPortsUDP": {"Type": "AWS::EC2::NetworkAclEntry","Properties": {"NetworkAclId": {"Ref": "NetworkAcl"},"RuleNumber": "41","Protocol": "17","RuleAction": "allow","Egress": "false","CidrBlock": "0.0.0.0/0","PortRange": {"From": "1024","To": "65535"}}},"NetworkAceEgress": {"Type": "AWS::EC2::NetworkAclEntry","Properties": {"NetworkAclId": {"Ref": "NetworkAcl"},"RuleNumber": "10","Protocol": "-1","RuleAction": "allow","Egress": "true","CidrBlock": "0.0.0.0/0","PortRange": {"From": "0","To": "65535"}}},"NetworkAclAssociationA": {"Type": "AWS::EC2::SubnetNetworkAclAssociation","Properties": {"SubnetId": {"Ref": "SubnetA"},"NetworkAclId": {"Ref": "NetworkAcl"}}},"NetworkAclAssociationB": {"Type": "AWS::EC2::SubnetNetworkAclAssociation","Properties": {"SubnetId": {"Ref": "SubnetB"},"NetworkAclId": {"Ref": "NetworkAcl"}}},"SecurityGroupJenkins": {"Type": "AWS::EC2::SecurityGroup","Properties": {"GroupDescription": "SecurityGroupforjenkins","VpcId": {"Ref": "VPC"},"Tags": [{"Key": "Name","Value": "jenkins-multiaz"}],"SecurityGroupIngress": [{"IpProtocol": "tcp","FromPort": "22","ToPort": "22","CidrIp": "0.0.0.0/0"},{"IpProtocol": "tcp","FromPort": "8080","ToPort": "8080","CidrIp": "0.0.0.0/0"},{"IpProtocol": "icmp","FromPort": "-1","ToPort": "-1","CidrIp": "0.0.0.0/0"}]}},"LaunchTemplate": {"Type": "AWS::EC2::LaunchTemplate","Properties": {"LaunchTemplateName": "LaunchTemplate","LaunchTemplateData":{"ImageId": {"Fn::FindInMap": ["EC2RegionMap", {"Ref": "AWS::Region"}, "AmazonLinuxAMIHVMEBSBacked64bit"]},"KeyName": {"Ref": "KeyName"},"NetworkInterfaces":[{"DeviceIndex":0,"AssociatePublicIpAddress":true,"Groups":[{"Ref": "SecurityGroupJenkins"}],"DeleteOnTermination":true}],"InstanceType": "t2.micro","UserData": {"Fn::Base64": {"Fn::Join": ["",["#!/bin/bash -ex\n","wget http://pkg.jenkins-ci.org/redhat/jenkins-1.616-1.1.noarch.rpm\n","rpm --install jenkins-1.616-1.1.noarch.rpm\n","sed -i -e 's/JENKINS_ARGS=\\\"\\\"/JENKINS_ARGS=\\\"--argumentsRealm.passwd.admin=", {"Ref": "JenkinsAdminPassword"}, " --argumentsRealm.roles.admin=admin\\\"/g' /etc/sysconfig/jenkins\n","echo \"<?xml version='1.0' encoding='UTF-8'?><hudson><version>1.0</version><useSecurity>true</useSecurity><authorizationStrategy class=\\\"hudson.security.FullControlOnceLoggedInAuthorizationStrategy\\\"/><securityRealm class=\\\"hudson.security.LegacySecurityRealm\\\"/></hudson>\" > /var/lib/jenkins/config.xml\n","service jenkins start\n"]]}}}}},"AutoScalingGroup": {"Type": "AWS::AutoScaling::AutoScalingGroup","Properties": {"LaunchTemplate" : {"LaunchTemplateId" : {"Ref" : "LaunchTemplate"},"Version" : {"Fn::GetAtt" : ["LaunchTemplate","LatestVersionNumber"]}},"Tags": [{"Key": "Name","Value": "jenkins-multiaz","PropagateAtLaunch": true}],"DesiredCapacity": 1,"MinSize": 1,"MaxSize": 1,"VPCZoneIdentifier": [{"Ref": "SubnetA"}, {"Ref": "SubnetB"}],"HealthCheckGracePeriod": 600,"HealthCheckType": "EC2"},"DependsOn": "GatewayToInternet"}}
      }
      
    • 代码解析
      • AutoScalingGroup设定了两个subnet,可以在一个subnetEC2 server出现问题的时候,在另一个subnet启动另一个EC2 server
        在这里插入图片描述
      • subnet Asubnet B
        每个subnet都在不同的Availability Zone
        在这里插入图片描述
    • 创建一个jenkins task
      在这里插入图片描述
    • 删除jenkins实例
      在这里插入图片描述
    • 检测Auto Scaling Group的动作
      可以看到Auto Scaling Group会马上启动另一个EC2 server来支持jenkins服务。

    在这里插入图片描述
    注意,这里,IP地址和建立的jenkins task都已经没有了,接下来解决两个问题。

  2. 使用AMI进行恢复。

    • 在现在的jenkins server上建立task
      在这里插入图片描述
    • 对当前的jenkins server保存镜像
      Dell@DESKTOP-DHMQMJG MINGW64 ~/.ssh
      $ aws ec2 create-image --instance-id i-05593a7ba7b94e566 --name jenkins-multiaz
      {"ImageId": "ami-01ed9b718c5a467c4"
      }
      
    • cloudformation进行更新
      *在参数中增加AMISnapshot,稍后更新CloudFormation的时候会选择上面建立的AMI
      在这里插入图片描述
      • cloudformation进行更新,LaunchTemplate里面设定AMI参数

        • 在参数中增加AMISnapshot,稍后更新CloudFormation的时候会选择上面建立的AMI

        在这里插入图片描述

        • cloudformation进行更新
          在这里插入图片描述
      • Cloudformation更新成功
        在这里插入图片描述

      • 删除当前的Jenkins server
        在这里插入图片描述

      • 重启之后的jenkins server确认
        可以看到上面建立的jenkins task已经保留过来了,原因是使用了AMI,对当前的EBS进行了保存。
        在这里插入图片描述

    • cloudformation代码
      {"AWSTemplateFormatVersion": "2010-09-09","Description": "AWS in Action: chapter 11 (Jenkins (CI server) running with Auto Scaling Group over multiple AZs)","Parameters": {"KeyName": {"Description": "Key Pair name","Type": "AWS::EC2::KeyPair::KeyName","Default": "my-cli-key"},"JenkinsAdminPassword": {"Description": "Password for Jenkins admin user","Type": "String","AllowedPattern" : "[a-zA-Z0-9]*","MinLength" : "8","MaxLength" : "42"},"AMISnapshot": {"Description": "AMI ID to start virtual server from.","Type": "String","AllowedPattern" : "[\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\n\t]*","MinLength" : "1","MaxLength" : "255"}},"Resources": {"VPC": {"Type": "AWS::EC2::VPC","Properties": {"EnableDnsSupport": "true","EnableDnsHostnames": "true","CidrBlock": "10.0.0.0/16","Tags": [{"Key": "Name","Value": "jenkins-multiaz"}]}},"SubnetA": {"Type": "AWS::EC2::Subnet","Properties": {"VpcId": {"Ref": "VPC"},"AvailabilityZone": {"Fn::Select": ["0", {"Fn::GetAZs": ""}]},"CidrBlock": "10.0.0.0/24","Tags": [{"Key": "Name","Value": "jenkins-multiaz"}]}},"SubnetB": {"Type": "AWS::EC2::Subnet","Properties": {"VpcId": {"Ref": "VPC"},"AvailabilityZone": {"Fn::Select": ["1", {"Fn::GetAZs": ""}]},"CidrBlock": "10.0.1.0/24","Tags": [{"Key": "Name","Value": "jenkins-multiaz"}]}},"InternetGateway": {"Type": "AWS::EC2::InternetGateway","Properties": {"Tags": [{"Key": "Name","Value": "jenkins-multiaz"}]}},"GatewayToInternet": {"Type": "AWS::EC2::VPCGatewayAttachment","Properties": {"VpcId": {"Ref": "VPC"},"InternetGatewayId": {"Ref": "InternetGateway"}}},"RouteTable": {"Type": "AWS::EC2::RouteTable","Properties": {"VpcId": {"Ref": "VPC"},"Tags": [{"Key": "Name","Value": "jenkins-multiaz"}]}},"InternetRoute": {"Type": "AWS::EC2::Route","Properties": {"RouteTableId": {"Ref": "RouteTable"},"DestinationCidrBlock": "0.0.0.0/0","GatewayId": {"Ref": "InternetGateway"}},"DependsOn": "GatewayToInternet"},"RouteTableAssociationA": {"Type": "AWS::EC2::SubnetRouteTableAssociation","Properties": {"SubnetId": {"Ref": "SubnetA"},"RouteTableId": {"Ref": "RouteTable"}}},"RouteTableAssociationB": {"Type": "AWS::EC2::SubnetRouteTableAssociation","Properties": {"SubnetId": {"Ref": "SubnetB"},"RouteTableId": {"Ref": "RouteTable"}}},"NetworkAcl": {"Type": "AWS::EC2::NetworkAcl","Properties": {"VpcId": {"Ref": "VPC"},"Tags": [{"Key": "Name","Value": "jenkins-multiaz"}]}},"NetworkAceSSH": {"Type": "AWS::EC2::NetworkAclEntry","Properties": {"NetworkAclId": {"Ref": "NetworkAcl"},"RuleNumber": "10","Protocol": "6","RuleAction": "allow","Egress": "false","CidrBlock": "0.0.0.0/0","PortRange": {"From": "22","To": "22"}}},"NetworkAceJenkinsHTTP": {"Type": "AWS::EC2::NetworkAclEntry","Properties": {"NetworkAclId": {"Ref": "NetworkAcl"},"RuleNumber": "11","Protocol": "6","RuleAction": "allow","Egress": "false","CidrBlock": "0.0.0.0/0","PortRange": {"From": "8080","To": "8080"}}},"NetworkAceNTP": {"Type": "AWS::EC2::NetworkAclEntry","Properties": {"NetworkAclId": {"Ref": "NetworkAcl"},"RuleNumber": "20","Protocol": "17","RuleAction": "allow","Egress": "false","CidrBlock": "0.0.0.0/0","PortRange": {"From": "123","To": "123"}}},"NetworkAceICMP": {"Type": "AWS::EC2::NetworkAclEntry","Properties": {"NetworkAclId": {"Ref": "NetworkAcl"},"RuleNumber": "30","Protocol": "1","RuleAction": "allow","Egress": "false","CidrBlock": "0.0.0.0/0","Icmp": {"Code": "-1","Type": "-1"}}},"NetworkAceHighPortsTCP": {"Type": "AWS::EC2::NetworkAclEntry","Properties": {"NetworkAclId": {"Ref": "NetworkAcl"},"RuleNumber": "40","Protocol": "6","RuleAction": "allow","Egress": "false","CidrBlock": "0.0.0.0/0","PortRange": {"From": "1024","To": "65535"}}},"NetworkAceHighPortsUDP": {"Type": "AWS::EC2::NetworkAclEntry","Properties": {"NetworkAclId": {"Ref": "NetworkAcl"},"RuleNumber": "41","Protocol": "17","RuleAction": "allow","Egress": "false","CidrBlock": "0.0.0.0/0","PortRange": {"From": "1024","To": "65535"}}},"NetworkAceEgress": {"Type": "AWS::EC2::NetworkAclEntry","Properties": {"NetworkAclId": {"Ref": "NetworkAcl"},"RuleNumber": "10","Protocol": "-1","RuleAction": "allow","Egress": "true","CidrBlock": "0.0.0.0/0","PortRange": {"From": "0","To": "65535"}}},"NetworkAclAssociationA": {"Type": "AWS::EC2::SubnetNetworkAclAssociation","Properties": {"SubnetId": {"Ref": "SubnetA"},"NetworkAclId": {"Ref": "NetworkAcl"}}},"NetworkAclAssociationB": {"Type": "AWS::EC2::SubnetNetworkAclAssociation","Properties": {"SubnetId": {"Ref": "SubnetB"},"NetworkAclId": {"Ref": "NetworkAcl"}}},"SecurityGroupJenkins": {"Type": "AWS::EC2::SecurityGroup","Properties": {"GroupDescription": "SecurityGroupforjenkins","VpcId": {"Ref": "VPC"},"Tags": [{"Key": "Name","Value": "jenkins-multiaz"}],"SecurityGroupIngress": [{"IpProtocol": "tcp","FromPort": "22","ToPort": "22","CidrIp": "0.0.0.0/0"},{"IpProtocol": "tcp","FromPort": "8080","ToPort": "8080","CidrIp": "0.0.0.0/0"},{"IpProtocol": "icmp","FromPort": "-1","ToPort": "-1","CidrIp": "0.0.0.0/0"}]}},"LaunchTemplate": {"Type": "AWS::EC2::LaunchTemplate","Properties": {"LaunchTemplateName": "LaunchTemplate","LaunchTemplateData":{"ImageId": {"Ref": "AMISnapshot"},"KeyName": {"Ref": "KeyName"},"NetworkInterfaces":[{"DeviceIndex":0,"AssociatePublicIpAddress":true,"Groups":[{"Ref": "SecurityGroupJenkins"}],"DeleteOnTermination":true}],"InstanceType": "t2.micro","UserData": {"Fn::Base64": {"Fn::Join": ["",["#!/bin/bash -ex\n","wget http://pkg.jenkins-ci.org/redhat/jenkins-1.616-1.1.noarch.rpm\n","rpm --install jenkins-1.616-1.1.noarch.rpm\n","sed -i -e 's/JENKINS_ARGS=\\\"\\\"/JENKINS_ARGS=\\\"--argumentsRealm.passwd.admin=", {"Ref": "JenkinsAdminPassword"}, " --argumentsRealm.roles.admin=admin\\\"/g' /etc/sysconfig/jenkins\n","echo \"<?xml version='1.0' encoding='UTF-8'?><hudson><version>1.0</version><useSecurity>true</useSecurity><authorizationStrategy class=\\\"hudson.security.FullControlOnceLoggedInAuthorizationStrategy\\\"/><securityRealm class=\\\"hudson.security.LegacySecurityRealm\\\"/></hudson>\" > /var/lib/jenkins/config.xml\n","service jenkins start\n"]]}}}}},"AutoScalingGroup": {"Type": "AWS::AutoScaling::AutoScalingGroup","Properties": {"LaunchTemplate" : {"LaunchTemplateId" : {"Ref" : "LaunchTemplate"},"Version" : {"Fn::GetAtt" : ["LaunchTemplate","LatestVersionNumber"]}},"Tags": [{"Key": "Name","Value": "jenkins-multiaz","PropagateAtLaunch": true}],"DesiredCapacity": 1,"MinSize": 1,"MaxSize": 1,"VPCZoneIdentifier": [{"Ref": "SubnetA"}, {"Ref": "SubnetB"}],"HealthCheckGracePeriod": 600,"HealthCheckType": "EC2"},"DependsOn": "GatewayToInternet"}}
      }
      
  3. 使用elastic IP进行对网络接口进行固定。

    • IP地址每次都要发生变化,还是不理想。
    • 利用elastic IP进行网络接口的固定
    • 修改的代码
      • 设定IamRole

        "IamRole": {"Type": "AWS::IAM::Role","Properties": {"AssumeRolePolicyDocument": {"Version": "2012-10-17","Statement": [{"Effect": "Allow","Principal": {"Service": ["ec2.amazonaws.com"]},"Action": ["sts:AssumeRole"]}]},"Path": "/","Policies": [{"PolicyName": "root","PolicyDocument": {"Version": "2012-10-17","Statement": [{"Action": ["ec2:AssociateAddress"],"Resource": ["*"],"Effect": "Allow"}]}}]}},"IamInstanceProfile": {"Type": "AWS::IAM::InstanceProfile","Properties": {"Path": "/","Roles": [{"Ref": "IamRole"}]}},
        

        在这里插入图片描述

        • LaunchTemplate设定IamRole参数
          这里主要是为了给EC2 server实例设定IamRole,以便EC2 server能够执行aws ec2 associate-address命令,在灾难恢复的时候设定固定的Elastic IP
          在这里插入图片描述
        • 更新cloudformation堆栈
          在这里插入图片描述
        • Elastic IP整体代码
          {"AWSTemplateFormatVersion": "2010-09-09","Description": "AWS in Action: chapter 11 (Jenkins (CI server) running with Auto Scaling Group over multiple AZs)","Parameters": {"KeyName": {"Description": "Key Pair name","Type": "AWS::EC2::KeyPair::KeyName","Default": "my-cli-key"},"JenkinsAdminPassword": {"Description": "Password for Jenkins admin user","Type": "String","AllowedPattern" : "[a-zA-Z0-9]*","MinLength" : "8","MaxLength" : "42"},"AMISnapshot": {"Description": "AMI ID to start virtual server from.","Type": "String","AllowedPattern" : "[\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\n\t]*","MinLength" : "1","MaxLength" : "255"}},"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": {"EnableDnsSupport": "true","EnableDnsHostnames": "true","CidrBlock": "10.0.0.0/16","Tags": [{"Key": "Name","Value": "jenkins-multiaz"}]}},"SubnetA": {"Type": "AWS::EC2::Subnet","Properties": {"VpcId": {"Ref": "VPC"},"AvailabilityZone": {"Fn::Select": ["0", {"Fn::GetAZs": ""}]},"CidrBlock": "10.0.0.0/24","Tags": [{"Key": "Name","Value": "jenkins-multiaz"}]}},"SubnetB": {"Type": "AWS::EC2::Subnet","Properties": {"VpcId": {"Ref": "VPC"},"AvailabilityZone": {"Fn::Select": ["1", {"Fn::GetAZs": ""}]},"CidrBlock": "10.0.1.0/24","Tags": [{"Key": "Name","Value": "jenkins-multiaz"}]}},"InternetGateway": {"Type": "AWS::EC2::InternetGateway","Properties": {"Tags": [{"Key": "Name","Value": "jenkins-multiaz"}]}},"GatewayToInternet": {"Type": "AWS::EC2::VPCGatewayAttachment","Properties": {"VpcId": {"Ref": "VPC"},"InternetGatewayId": {"Ref": "InternetGateway"}}},"RouteTable": {"Type": "AWS::EC2::RouteTable","Properties": {"VpcId": {"Ref": "VPC"},"Tags": [{"Key": "Name","Value": "jenkins-multiaz"}]}},"InternetRoute": {"Type": "AWS::EC2::Route","Properties": {"RouteTableId": {"Ref": "RouteTable"},"DestinationCidrBlock": "0.0.0.0/0","GatewayId": {"Ref": "InternetGateway"}},"DependsOn": "GatewayToInternet"},"RouteTableAssociationA": {"Type": "AWS::EC2::SubnetRouteTableAssociation","Properties": {"SubnetId": {"Ref": "SubnetA"},"RouteTableId": {"Ref": "RouteTable"}}},"RouteTableAssociationB": {"Type": "AWS::EC2::SubnetRouteTableAssociation","Properties": {"SubnetId": {"Ref": "SubnetB"},"RouteTableId": {"Ref": "RouteTable"}}},"NetworkAcl": {"Type": "AWS::EC2::NetworkAcl","Properties": {"VpcId": {"Ref": "VPC"},"Tags": [{"Key": "Name","Value": "jenkins-multiaz"}]}},"NetworkAceSSH": {"Type": "AWS::EC2::NetworkAclEntry","Properties": {"NetworkAclId": {"Ref": "NetworkAcl"},"RuleNumber": "10","Protocol": "6","RuleAction": "allow","Egress": "false","CidrBlock": "0.0.0.0/0","PortRange": {"From": "22","To": "22"}}},"NetworkAceJenkinsHTTP": {"Type": "AWS::EC2::NetworkAclEntry","Properties": {"NetworkAclId": {"Ref": "NetworkAcl"},"RuleNumber": "11","Protocol": "6","RuleAction": "allow","Egress": "false","CidrBlock": "0.0.0.0/0","PortRange": {"From": "8080","To": "8080"}}},"NetworkAceNTP": {"Type": "AWS::EC2::NetworkAclEntry","Properties": {"NetworkAclId": {"Ref": "NetworkAcl"},"RuleNumber": "20","Protocol": "17","RuleAction": "allow","Egress": "false","CidrBlock": "0.0.0.0/0","PortRange": {"From": "123","To": "123"}}},"NetworkAceICMP": {"Type": "AWS::EC2::NetworkAclEntry","Properties": {"NetworkAclId": {"Ref": "NetworkAcl"},"RuleNumber": "30","Protocol": "1","RuleAction": "allow","Egress": "false","CidrBlock": "0.0.0.0/0","Icmp": {"Code": "-1","Type": "-1"}}},"NetworkAceHighPortsTCP": {"Type": "AWS::EC2::NetworkAclEntry","Properties": {"NetworkAclId": {"Ref": "NetworkAcl"},"RuleNumber": "40","Protocol": "6","RuleAction": "allow","Egress": "false","CidrBlock": "0.0.0.0/0","PortRange": {"From": "1024","To": "65535"}}},"NetworkAceHighPortsUDP": {"Type": "AWS::EC2::NetworkAclEntry","Properties": {"NetworkAclId": {"Ref": "NetworkAcl"},"RuleNumber": "41","Protocol": "17","RuleAction": "allow","Egress": "false","CidrBlock": "0.0.0.0/0","PortRange": {"From": "1024","To": "65535"}}},"NetworkAceEgress": {"Type": "AWS::EC2::NetworkAclEntry","Properties": {"NetworkAclId": {"Ref": "NetworkAcl"},"RuleNumber": "10","Protocol": "-1","RuleAction": "allow","Egress": "true","CidrBlock": "0.0.0.0/0","PortRange": {"From": "0","To": "65535"}}},"NetworkAclAssociationA": {"Type": "AWS::EC2::SubnetNetworkAclAssociation","Properties": {"SubnetId": {"Ref": "SubnetA"},"NetworkAclId": {"Ref": "NetworkAcl"}}},"NetworkAclAssociationB": {"Type": "AWS::EC2::SubnetNetworkAclAssociation","Properties": {"SubnetId": {"Ref": "SubnetB"},"NetworkAclId": {"Ref": "NetworkAcl"}}},"SecurityGroupJenkins": {"Type": "AWS::EC2::SecurityGroup","Properties": {"GroupDescription": "SecurityGroupforjenkins","VpcId": {"Ref": "VPC"},"Tags": [{"Key": "Name","Value": "jenkins-multiaz"}],"SecurityGroupIngress": [{"IpProtocol": "tcp","FromPort": "22","ToPort": "22","CidrIp": "0.0.0.0/0"},{"IpProtocol": "tcp","FromPort": "8080","ToPort": "8080","CidrIp": "0.0.0.0/0"},{"IpProtocol": "icmp","FromPort": "-1","ToPort": "-1","CidrIp": "0.0.0.0/0"}]}},"IamRole": {"Type": "AWS::IAM::Role","Properties": {"AssumeRolePolicyDocument": {"Version": "2012-10-17","Statement": [{"Effect": "Allow","Principal": {"Service": ["ec2.amazonaws.com"]},"Action": ["sts:AssumeRole"]}]},"Path": "/","Policies": [{"PolicyName": "AttachIP","PolicyDocument": {"Version": "2012-10-17","Statement": [{"Action": ["ec2:AssociateAddress"],"Resource": ["*"],"Effect": "Allow"}]}}]}},"IamInstanceProfile": {"Type": "AWS::IAM::InstanceProfile","Properties": {"Path": "/","Roles": [{"Ref": "IamRole"}]}},"ElasticIP": {"Type": "AWS::EC2::EIP","Properties": {"Domain": "vpc"},"DependsOn": "GatewayToInternet"},"LaunchTemplate": {"Type": "AWS::EC2::LaunchTemplate","Properties": {"LaunchTemplateName": "LaunchTemplate","LaunchTemplateData":{"ImageId": {"Ref": "AMISnapshot"},"KeyName": {"Ref": "KeyName"},"IamInstanceProfile": { "Arn": {"Fn::GetAtt": ["IamInstanceProfile","Arn"]}},"NetworkInterfaces":[{"DeviceIndex":0,"AssociatePublicIpAddress":true,"Groups":[{"Ref": "SecurityGroupJenkins"}],"DeleteOnTermination":true}],"InstanceType": "t2.micro","UserData": {"Fn::Base64": {"Fn::Join": ["",["#!/bin/bash -ex\n","aws configure set default.region ", {"Ref": "AWS::Region"},"\n","INSTANCE_ID=`curl -s http://169.254.169.254/latest/meta-data/instance-id`\n","aws ec2 associate-address --instance-id $INSTANCE_ID --allocation-id ", {"Fn::GetAtt": ["ElasticIP", "AllocationId"]}, "\n","wget http://pkg.jenkins-ci.org/redhat/jenkins-1.616-1.1.noarch.rpm\n","rpm --install jenkins-1.616-1.1.noarch.rpm\n","sed -i -e 's/JENKINS_ARGS=\\\"\\\"/JENKINS_ARGS=\\\"--argumentsRealm.passwd.admin=", {"Ref": "JenkinsAdminPassword"}, " --argumentsRealm.roles.admin=admin\\\"/g' /etc/sysconfig/jenkins\n","echo \"<?xml version='1.0' encoding='UTF-8'?><hudson><version>1.0</version><useSecurity>true</useSecurity><authorizationStrategy class=\\\"hudson.security.FullControlOnceLoggedInAuthorizationStrategy\\\"/><securityRealm class=\\\"hudson.security.LegacySecurityRealm\\\"/></hudson>\" > /var/lib/jenkins/config.xml\n","service jenkins start\n"]]}}}}},"AutoScalingGroup": {"Type": "AWS::AutoScaling::AutoScalingGroup","Properties": {"LaunchTemplate" : {"LaunchTemplateId" : {"Ref" : "LaunchTemplate"},"Version" : {"Fn::GetAtt" : ["LaunchTemplate","LatestVersionNumber"]}},"Tags": [{"Key": "Name","Value": "jenkins-elasticip","PropagateAtLaunch": true}],"DesiredCapacity": 1,"MinSize": 1,"MaxSize": 1,"VPCZoneIdentifier": [{"Ref": "SubnetA"}, {"Ref": "SubnetB"}],"HealthCheckGracePeriod": 600,"HealthCheckType": "EC2"},"DependsOn": "GatewayToInternet"}},"Outputs": {"JenkinsURL": {"Description": "URL to access web interface of Jenkins server.","Value": {"Fn::Join": ["", ["http://", {"Ref": "ElasticIP"}, ":8080"]]}},"User": {"Description": "Administrator user for Jenkins.","Value": "admin"},"Password": {"Description": "Password for Jenkins administrator user.","Value": {"Ref": "JenkinsAdminPassword"}}}
          }
          
        • Jenkins ServerIP地址是Elastic IP
          可以看到IP地址是54.92.85.184,和Elastic IP相同的。

        在这里插入图片描述

        • 删除了Jenkins Server之后,重新启动的的IP地址还是Elastic IP
          在这里插入图片描述

相关文章:

aws(学习笔记第十五课) 如何从灾难中恢复(recover)

aws(学习笔记第十五课) 如何从灾难中恢复 学习内容&#xff1a; 使用CloudWatch对服务器进行监视与恢复区域(region)&#xff0c;可用区(available zone)和子网(subnet)使用自动扩展(AutoScalingGroup) 1. 使用CloudWatch对服务器进行监视与恢复 整体架构 这里模拟Jenkins Se…...

github webhooks 实现网站自动更新

本文目录 Github Webhooks 介绍Webhooks 工作原理配置与验证应用云服务器通过 Webhook 自动部署网站实现复制私钥编写 webhook 接口Github 仓库配置 webhook以服务的形式运行 app.py Github Webhooks 介绍 Webhooks是GitHub提供的一种通知方式&#xff0c;当GitHub上发生特定事…...

【C语言】递归的内存占用过程

递归 递归是函数调用自身的一种编程技术。在C语言中&#xff0c;递归的实现会占用内存栈&#xff08;Call Stack&#xff09;&#xff0c;每次递归调用都会在栈上分配一个新的 “栈帧&#xff08;Stack Frame&#xff09;”&#xff0c;用于存储本次调用的函数局部变量、返回地…...

365天深度学习训练营-第P6周:VGG-16算法-Pytorch实现人脸识别

&#x1f368; 本文为&#x1f517;365天深度学习训练营中的学习记录博客&#x1f356; 原作者&#xff1a;K同学啊 文为「365天深度学习训练营」内部文章 参考本文所写记录性文章&#xff0c;请在文章开头带上「&#x1f449;声明」 &#x1f37a;要求&#xff1a; 保存训练过…...

企业AI助理在数据分析与决策中扮演的角色

在当今这个数据驱动的时代&#xff0c;企业每天都需要处理和分析大量的数据&#xff0c;以支持其业务决策。然而&#xff0c;面对如此庞大的数据量&#xff0c;传统的数据分析方法已经显得力不从心。幸运的是&#xff0c;随着人工智能&#xff08;AI&#xff09;技术的不断发展…...

洛谷 B2029:大象喝水 ← 圆柱体体积

【题目来源】https://www.luogu.com.cn/problem/B2029【题目描述】 一只大象口渴了&#xff0c;要喝 20 升水才能解渴&#xff0c;但现在只有一个深 h 厘米&#xff0c;底面半径为 r 厘米的小圆桶 &#xff08;h 和 r 都是整数&#xff09;。问大象至少要喝多少桶水才会解渴。 …...

go每日一题:mock打桩、defer、recovery、panic的调用顺序

题目一&#xff1a;单元测试中使用—打桩 打桩概念&#xff1a;使用A替换 原函数B&#xff0c;那么A就是打桩函数打桩原理&#xff1a;运行时&#xff0c;通过一个包&#xff0c;将内存中函数的地址替换为桩函数的地址打桩操作&#xff1a;利用Patch&#xff08;&#xff09;函…...

STM32F103 HSE时钟倍频以及设置频率函数(新手向,本人也是新手)

HSE_SetSysCLK是野火教程里的,不懂的去这 16-RCC&#xff08;第3节&#xff09;使用HSE配置系统时钟并使用MCO输出监控系统时钟_哔哩哔哩_bilibili HSE_AutoSetHSE的算法部分是自己写的,用了一个转接数组。C语言不支持bool所以自己定义了一个boolK代替bool。 AutoHSE.h: /**…...

renderExtraFooter 添加本周,本月,本年

在 Ant Design Vue 中&#xff0c;a-date-picker 组件提供了一个 renderExtraFooter 属性&#xff0c;可以用来渲染额外的页脚内容。你可以利用这个属性来添加“本周”、“本月”和“本年”的按钮。下面是如何在 Vue 2 项目中实现这一功能的具体步骤&#xff1a; 1.确保安装了…...

SprinBoot整合KafKa的使用(详解)

前言 1. 高吞吐量&#xff08;High Throughput&#xff09; Kafka 设计的一个核心特性是高吞吐量。它能够每秒处理百万级别的消息&#xff0c;适合需要高频次、低延迟消息传递的场景。即使在大规模分布式环境下&#xff0c;它也能保持很高的吞吐量和性能&#xff0c;支持低延…...

【机器学习】CatBoost 模型实践:回归与分类的全流程解析

一. 引言 本篇博客首发于掘金 https://juejin.cn/post/7441027173430018067。 PS&#xff1a;转载自己的文章也算原创吧。 在机器学习领域&#xff0c;CatBoost 是一款强大的梯度提升框架&#xff0c;特别适合处理带有类别特征的数据。本篇博客以脱敏后的保险数据集为例&#x…...

PyTorch 实现动态输入

使用 PyTorch 实现动态输入&#xff1a;支持训练和推理输入维度不一致的 CNN 和 LSTM/GRU 模型 在深度学习中&#xff0c;处理不同大小的输入数据是一个常见的挑战。许多实际应用需要模型能够灵活地处理可变长度的输入。本文将介绍如何使用 PyTorch 实现支持动态输入的 CNN 和…...

【Linux相关】查看conda路径和conda和cudnn版本、安装cudnn、cuDNN无需登录官方下载链接

【Linux相关】 查看conda路径和conda和cudnn版本 安装cudnn cuDNN无需登录官方下载链接 文章目录 1. 查看信息1.1 查看 Conda 路径1.2 查看 Conda 版本1.3 查看 cuDNN 版本1.4 总结 2. 安装cudnn2.1 安装cudnn步骤2.2 cuDNN无需登录官方下载链接 1. 查看信息 查看Conda 路径、C…...

基于Java Springboot环境保护生活App且微信小程序

一、作品包含 源码数据库设计文档万字PPT全套环境和工具资源部署教程 二、项目技术 前端技术&#xff1a;Html、Css、Js、Vue、Element-ui 数据库&#xff1a;MySQL 后端技术&#xff1a;Java、Spring Boot、MyBatis 三、运行环境 开发工具&#xff1a;IDEA/eclipse 微信…...

简单的springboot使用sse功能

什么是sse? 1、SSE 是Server-Sent Events&#xff08;服务器发送事件&#xff09; 2、SSE是一种允许服务器主动向客户端推送实时更新的技术。 3、它基于HTTP协议&#xff0c;并使用了其长连接特性&#xff0c;在客户端与服务器之间建立一条持久化的连接。 通过这条连接&am…...

【服务器问题】xshell 登录远程服务器卡住( 而 vscode 直接登录不上)

打开 xshell ssh 登录远程服务器&#xff1a;卡在下面这里&#xff0c;迟迟不继续 当 SSH 连接卡在 Connection established. 之后&#xff0c;但没有显示远程终端提示符时&#xff0c;这通常意味着连接已经成功建立&#xff0c;说明不是网络连接和服务器连接问题&#xff0c;…...

AI×5G 市场前瞻及应用现状

本文为《5GAI时代&#xff1a;生活方式和市场的裂变》一书读后总结及研究。 本书的上架建议是“经营”&#xff0c;内容也更偏向于市场分析。书出版于2021年&#xff0c;现在是2024年&#xff0c;可以收集整理一些例子&#xff0c;看看书里的前瞻性5GAI应用预测&#xff0c;到…...

利用 Redis 与 Lua 脚本解决秒杀系统中的高并发与库存超卖问题

1. 前言 1.1 秒杀系统中的库存超卖问题 在电商平台上&#xff0c;秒杀活动是吸引用户参与并提升销量的一种常见方式。秒杀通常会以极低的价格限量出售某些商品&#xff0c;目的是制造紧迫感&#xff0c;吸引大量用户参与。然而&#xff0c;这种活动的特殊性也带来了许多技术挑…...

【MySQL】创建数据库、用户和密码

创建数据库、用户和密码参考sql语句 drop database if exists demoshop; drop user if exists demoshop%; -- 支持emoji&#xff1a;需要mysql数据库参数&#xff1a; character_set_serverutf8mb4 create database demoshop default character set utf8mb4 collate utf8mb4_un…...

leetcode hot100【Leetcode 72.编辑距离】java实现

Leetcode 72.编辑距离 题目描述 给定两个单词 word1 和 word2&#xff0c;返回将 word1 转换为 word2 所使用的最少操作数。 你可以对一个单词执行以下三种操作之一&#xff1a; 插入一个字符删除一个字符替换一个字符 示例 1: 输入: word1 "horse", word2 &…...

Vue2 第一节_Vue2上手_插值表达式{{}}_访问数据和修改数据_Vue开发者工具

文章目录 1.Vue2上手-如何创建一个Vue实例,进行初始化渲染2. 插值表达式{{}}3. 访问数据和修改数据4. vue响应式5. Vue开发者工具--方便调试 1.Vue2上手-如何创建一个Vue实例,进行初始化渲染 准备容器引包创建Vue实例 new Vue()指定配置项 ->渲染数据 准备一个容器,例如: …...

数据链路层的主要功能是什么

数据链路层&#xff08;OSI模型第2层&#xff09;的核心功能是在相邻网络节点&#xff08;如交换机、主机&#xff09;间提供可靠的数据帧传输服务&#xff0c;主要职责包括&#xff1a; &#x1f511; 核心功能详解&#xff1a; 帧封装与解封装 封装&#xff1a; 将网络层下发…...

稳定币的深度剖析与展望

一、引言 在当今数字化浪潮席卷全球的时代&#xff0c;加密货币作为一种新兴的金融现象&#xff0c;正以前所未有的速度改变着我们对传统货币和金融体系的认知。然而&#xff0c;加密货币市场的高度波动性却成为了其广泛应用和普及的一大障碍。在这样的背景下&#xff0c;稳定…...

USB Over IP专用硬件的5个特点

USB over IP技术通过将USB协议数据封装在标准TCP/IP网络数据包中&#xff0c;从根本上改变了USB连接。这允许客户端通过局域网或广域网远程访问和控制物理连接到服务器的USB设备&#xff08;如专用硬件设备&#xff09;&#xff0c;从而消除了直接物理连接的需要。USB over IP的…...

算法岗面试经验分享-大模型篇

文章目录 A 基础语言模型A.1 TransformerA.2 Bert B 大语言模型结构B.1 GPTB.2 LLamaB.3 ChatGLMB.4 Qwen C 大语言模型微调C.1 Fine-tuningC.2 Adapter-tuningC.3 Prefix-tuningC.4 P-tuningC.5 LoRA A 基础语言模型 A.1 Transformer &#xff08;1&#xff09;资源 论文&a…...

【LeetCode】3309. 连接二进制表示可形成的最大数值(递归|回溯|位运算)

LeetCode 3309. 连接二进制表示可形成的最大数值&#xff08;中等&#xff09; 题目描述解题思路Java代码 题目描述 题目链接&#xff1a;LeetCode 3309. 连接二进制表示可形成的最大数值&#xff08;中等&#xff09; 给你一个长度为 3 的整数数组 nums。 现以某种顺序 连接…...

STM32---外部32.768K晶振(LSE)无法起振问题

晶振是否起振主要就检查两个1、晶振与MCU是否兼容&#xff1b;2、晶振的负载电容是否匹配 目录 一、判断晶振与MCU是否兼容 二、判断负载电容是否匹配 1. 晶振负载电容&#xff08;CL&#xff09;与匹配电容&#xff08;CL1、CL2&#xff09;的关系 2. 如何选择 CL1 和 CL…...

用神经网络读懂你的“心情”:揭秘情绪识别系统背后的AI魔法

用神经网络读懂你的“心情”:揭秘情绪识别系统背后的AI魔法 大家好,我是Echo_Wish。最近刷短视频、看直播,有没有发现,越来越多的应用都开始“懂你”了——它们能感知你的情绪,推荐更合适的内容,甚至帮客服识别用户情绪,提升服务体验。这背后,神经网络在悄悄发力,撑起…...

32位寻址与64位寻址

32位寻址与64位寻址 32位寻址是什么&#xff1f; 32位寻址是指计算机的CPU、内存或总线系统使用32位二进制数来标识和访问内存中的存储单元&#xff08;地址&#xff09;&#xff0c;其核心含义与能力如下&#xff1a; 1. 核心定义 地址位宽&#xff1a;CPU或内存控制器用32位…...

李沐--动手学深度学习--GRU

1.GRU从零开始实现 #9.1.2GRU从零开始实现 import torch from torch import nn from d2l import torch as d2l#首先读取 8.5节中使用的时间机器数据集 batch_size,num_steps 32,35 train_iter,vocab d2l.load_data_time_machine(batch_size,num_steps) #初始化模型参数 def …...