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iam-eks.tf
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iam-eks.tf
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#-------------------------------------------------
# This will perform two things
# create IAM role for EKS and attach it following policies
# AmazonEKSClusterPolicy
# AmazonEKSServicePolicy
#--------------------------------------------------
resource "aws_iam_role" "eks-role" {
name = "rol-glob-${var.environment}-${var.cost_centre}-${var.app_service}eks-${random_string.eks-iam-role-policy-suffix.result}-${var.seq_id}"
force_detach_policies = true
assume_role_policy = <<POLICY
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Principal": {
"Service": [
"eks.amazonaws.com",
"eks-fargate-pods.amazonaws.com"
]
},
"Action": "sts:AssumeRole"
}
]
}
POLICY
}
# Policy help publish (PUT) metric data to cloud watch
# Publishes metric data points to Amazon CloudWatch.
# https://docs.aws.amazon.com/AmazonCloudWatch/latest/APIReference/API_PutMetricData.html
resource "aws_iam_policy" "AmazonEKSClusterCloudWatchMetricsPolicy" {
name = "pol-glob-${var.environment}-${var.cost_centre}-${var.app_service}eksClWatch-${random_string.eks-iam-role-policy-suffix.result}-${var.seq_id}"
policy = <<EOF
{
"Version": "2012-10-17",
"Statement": [
{
"Action": [
"cloudwatch:PutMetricData"
],
"Resource": "*",
"Effect": "Allow"
}
]
}
EOF
}
#policy for helping eks work with load balancer
resource "aws_iam_policy" "AmazonEKSClusterLBPolicy" {
name = "pol-glob-${var.environment}-${var.cost_centre}-${var.app_service}eksElb-${random_string.eks-iam-role-policy-suffix.result}-${var.seq_id}"
policy = <<EOF
{
"Version": "2012-10-17",
"Statement": [
{
"Action": [
"elasticloadbalancing:*",
"ec2:CreateSecurityGroup",
"ec2:Describe*"
],
"Resource": "*",
"Effect": "Allow"
}
]
}
EOF
}
resource "aws_iam_role_policy_attachment" "eks-cluster-policy-attachment" {
policy_arn = "arn:aws:iam::aws:policy/AmazonEKSClusterPolicy"
role = aws_iam_role.eks-role.name
}
resource "aws_iam_role_policy_attachment" "eks-service-policy-attachment" {
policy_arn = "arn:aws:iam::aws:policy/AmazonEKSServicePolicy"
role = aws_iam_role.eks-role.name
}
resource "aws_iam_role_policy_attachment" "eks-vpc-resource-controller-attachment" {
policy_arn = "arn:aws:iam::aws:policy/AmazonEKSVPCResourceController"
role = aws_iam_role.eks-role.name
}
resource "aws_iam_role_policy_attachment" "eks-cluster-cloud-watch-metric-policy-attachment" {
policy_arn = aws_iam_policy.AmazonEKSClusterCloudWatchMetricsPolicy.arn
role = aws_iam_role.eks-role.name
}
resource "aws_iam_role_policy_attachment" "eks-cluster-lb-policy-attachment" {
policy_arn = aws_iam_policy.AmazonEKSClusterLBPolicy.arn
role = aws_iam_role.eks-role.name
}