特定ENI的流量日志

Question

所以我应该能够为特定的实例网络接口创建vpc流日志。

我已经能够为整个vpc创建vpc流日志，但不能创建特定实例网络接口。如果我创建了一个实例。它附带一个eni。我认为我应该能够检查实例以找到eni并获得eni id。

对于这个源代码

resource "aws_instance" "master_inst" { ...}
resource "aws_flow_log" "example-instance-flow-log" {
provider = aws.region_master
iam_role_arn    = aws_iam_role.master-vpc-flow-log-role.arn
log_destination = aws_cloudwatch_log_group.master-instance-flow-log.arn
traffic_type    = "ALL"
eni_id          = aws_instance.master_inst.network_interface.id
}
resource "aws_cloudwatch_log_group" "master-instance-flow-log" {
provider = aws.region_master
name = "master-instance-flow-log"
}

我得到

Error: Cannot index a set value
│ 
│   on ../../modules/instances.tf line 78, in resource "aws_flow_log" "example-instance-flow-log":
│   78:   eni_id          = aws_instance.master_inst.network_interface.id
│ 
│ Block type "network_interface" is represented by a set of objects, and set elements do not have addressable keys. To find elements matching specific criteria, use a "for" expression with an "if"
│ clause.

Answer 1

这就成功了为了让Terraform destroy清理日志组，角色需要拥有销毁日志组的权限。现在不幸的是，由于某种原因将删除添加到策略中，三分之一实际上并没有删除日志组。因此，您必须保持控制台打开才能手动删除日志组。

resource "aws_iam_role" "flowlog-role" {
provider = aws.region_master
name     = "flowlog-role"
assume_role_policy = <<EOF
{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "",
"Effect": "Allow",
"Principal": {
"Service": "vpc-flow-logs.amazonaws.com"
},
"Action": "sts:AssumeRole"
}
]
}
EOF
}
resource "aws_iam_role_policy" "flowlog-role-policy" {
provider = aws.region_master
name     = "flowlog-role-policy"
role     = aws_iam_role.flowlog-role.id
policy = <<EOF
{
"Version": "2012-10-17",
"Statement": [
{
"Action": [
"logs:CreateLogGroup",
"logs:DeleteLogGroup",
"logs:CreateLogStream",
"lots:DeleteLogStream",
"logs:PutLogEvents",
"logs:DescribeLogGroups",
"logs:DescribeLogStreams"
],
"Effect": "Allow",
"Resource": "*"
}
]
}
EOF
}

resource "aws_cloudwatch_log_group" "master-instance-flowlog-grp" {
count           = var.enable_instance_flowlog? 1 : 0
provider          = aws.region_master
name              = "master-instance-flowlog-grp"
retention_in_days = 3 ## need to specify number of days otherwise terraform destroy will not remove log group
}
resource "aws_flow_log" "master-instance-flowlog" {
count           = var.enable_instance_flowlog? 1 : 0
provider        = aws.region_master
iam_role_arn    = aws_iam_role.flowlog-role.arn
log_destination = aws_cloudwatch_log_group.master-instance-flowlog-grp[count.index].arn
traffic_type    = "ALL"
eni_id          = aws_instance.master_instance.primary_network_interface_id
}