如何向ELBV2注册EC2实例？

Question

我正在尝试使用ELBV2注册一个新的EC2实例。我正在从AWSPowershell模块尝试，但无法使其工作。

$InstanceId = (Invoke-WebRequest 'http://169.254.169.254/latest/meta-data/instance-id').Content
Register-ELB2Target -TargetGroupArn 'arn:etc...' -Target $InstanceID

错误是：

Register-ELB2Target : Cannot bind parameter 'Target'. Cannot convert the "i-redacted" value of type "System.String" to type
"Amazon.ElasticLoadBalancingV2.Model.TargetDescription".

我查看了文档，可以看到它也可以使用端口(可选)。我已经尝试添加端口，但仍然没有成功。

Answer 1

您没有正确创建TargetDescription对象，它应该如下所示：

$thisInstance = New-Object Amazon.ElasticLoadBalancingV2.Model.TargetDescription
$thisInstance.Id = $instanceId
$thisInstance.Port = 80

对于其他来这里寻找简单答案的人，我们使用以下脚本在部署新包时将自己注册到ALB：

Set-DefaultAWSRegion "ap-southeast-2"

# work out the id and load balancer for this instance
$instanceId = (wget -UseBasicParsing "http://169.254.169.254/latest/meta-data/instance-id").Content
$targetGroupArn = (Get-EC2Tag -Filter @{Name="resource-id"; Values=$instanceId}, @{Name="key";Values="<name of key>"}).Value # instances have the alb arn tagged in when created by an autoscaling group

$thisInstance = New-Object Amazon.ElasticLoadBalancingV2.Model.TargetDescription
$thisInstance.Id = $instanceId
$thisInstance.Port = 80

write-host "Adding $instanceId to $targetGroupArn"

# register instace with ALB
Register-ELB2Target -TargetGroupArn $targetGroupArn -Targets @( $thisInstance ) -Force

write-host "Done"

Answer 2

基本上，它与@CamM的答案相同，但语法更短：

Register-ELB2Target -TargetGroupArn $targetGroupArn -Target @{ Id = $instanceId; Port = 80 }