如何在ELBV2中注册EC2实例？

Question

我正在尝试向ELBV2注册新的EC2实例。我正在尝试使用AWSPowershell模块，但无法正常工作。

$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".

我检查了文档，可以看到它也可以占用一个端口（可选）。曾尝试添加端口，但仍然没有运气。

Answer 1

您没有正确创建TargetDescription对象，它应该类似于：

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

对于到达这里寻求简单答案的任何人，我们使用以下脚本作为实例，以在部署新软件包时向ALB注册自己：

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"