amazon-ec2 - 使用 cloudformation 堆栈在带有 ansible 的自动缩放组中配置 ec2

Question

我创建了自动扩展组，该组启动具有 ELB 的 EC2。我的问题是如何使用 ansible 配置这些 EC2 实例？之前我使用CNAME，但现在我无法获取实例dns。如果我错了，请纠正我。

我应该使用动态库存还是还有其他选择？

下面是我的云形成模板:

```

{
  "AWSTemplateFormatVersion" : "2010-09-09",
 "Description" : "Template create autoscaling group",
  "Parameters": {
   "devKeyPair": {
  "Description": "Name of an existing EC2 KeyPair to enable SSH access to the instances",
  "Type": "AWS::EC2::KeyPair::KeyName",
  "Default" : "dev-key"

}
},
"Resources" : {
"LaunchConfig" : {
"Type" : "AWS::AutoScaling::LaunchConfiguration",
"Properties" : {
  "KeyName" : { "Ref": "devKeyPair" },
  "ImageId" : "ami-1effc703",
   "UserData" : { "Fn::Base64" : { "Fn::Join" : ["", [
  "#!/bin/bash\n", "\n", "    echo 'Installing Git'\n","    yum --nogpgcheck -y install wget\n""] ]}},
  "InstanceType" : "t2.small",
  "BlockDeviceMappings" : [
     {
       "DeviceName" : "/dev/sda1",
       "Ebs" : { 
          "VolumeSize" : "10", 
          "VolumeType" : "gp2", 
          "DeleteOnTermination" : "true"
          } 
     }
  ]
 }
 },
"BackendGroup" : {
  "Type" : "AWS::AutoScaling::AutoScalingGroup",
  "Properties" : {
    "AvailabilityZones" : ["eu-central-1a"],
  "MinSize" : "1",
  "MaxSize" : "1",
  "LaunchConfigurationName" : { "Ref" : "LaunchConfig" },
  "LoadBalancerNames" : [ { "Ref" : "ElasticLoadBalancer" } ],
  "Tags": [
    {
        "ResourceType": "auto-scaling-group",
        "ResourceId": "bas-auto",
        "Value": "bas-dev",
        "Key": "Name",
        "PropagateAtLaunch" : "true"
    }
]
  }
},

"ElasticLoadBalancer": {
  "Type": "AWS::ElasticLoadBalancing::LoadBalancer",
  "Properties": {
  "AvailabilityZones": ["eu-central-1a"],
    "Listeners": [ {
      "LoadBalancerPort": "80",
      "InstancePort": "80",
      "Protocol": "HTTP"
    } ]
  }
},
"BackendDNS" : {
  "Type" : "AWS::Route53::RecordSetGroup",
  "Properties" : {
    "HostedZoneName" : "example.com.",
    "Comment" : "Targered to Bas instance",
    "RecordSets" : [{
      "Name" : "bas-dev.example.com.",
      "Type" : "CNAME",
      "TTL" : "300",
      "ResourceRecords" :  [
        {
            "Fn::GetAtt": [ "ElasticLoadBalancer", "DNSName" ]
        }
      ]
    }]
  }
},
}
}

```

Answer 1

另一个解决方案是在启动新实例之前配置您的虚拟机。 IE。确保您启动 ASG 实例的镜像已配置。一种方法是使用类似 packer.io 的内容。使用 Ansible 作为您的配置程序来创建新的 AMI。然后，您只需将此新的 AMI ID 传递到 LaunchConfiguration 的 ImageId 属性中即可。

另一种方法可能涉及使用用户数据“打电话回家”并告诉您实例已获取的公共(public) IP 地址。