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security_group.tf
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resource "aws_security_group" "eks_master" {
name = "${var.cluster_name}-master"
description = "Cluster communication with worker nodes"
vpc_id = var.vpc_id
egress {
from_port = 0
to_port = 0
protocol = "-1"
cidr_blocks = ["0.0.0.0/0"]
}
tags = merge({Name="${var.cluster_name}-master"}, var.eks_tags)
}
resource "aws_security_group_rule" "eks_master_api" {
cidr_blocks = ["0.0.0.0/0"]
description = "Allow workstation to communicate with the cluster API Server"
from_port = 443
protocol = "tcp"
security_group_id = aws_security_group.eks_master.id
to_port = 443
type = "ingress"
}
resource "aws_security_group" "eks_worker" {
name = "${var.cluster_name}-worker"
description = "Security group for all worker nodes in the cluster"
vpc_id = var.vpc_id
egress {
from_port = 0
to_port = 0
protocol = "-1"
cidr_blocks = ["0.0.0.0/0"]
}
tags = merge({Name="${var.cluster_name}-worker"}, var.eks_tags)
}
resource "aws_security_group_rule" "eks_worker_ingress_ssh" {
count = length(var.eks_worker_ssh_cidrs) > 0 ? 1 : 0
description = "Allow ssh connections"
from_port = 22
protocol = "tcp"
security_group_id = aws_security_group.eks_worker.id
cidr_blocks = var.eks_worker_ssh_cidrs
to_port = 22
type = "ingress"
}
resource "aws_security_group_rule" "eks_worker_ingress_self" {
description = "Allow node to communicate with each other"
from_port = 0
protocol = "-1"
security_group_id = aws_security_group.eks_worker.id
source_security_group_id = aws_security_group.eks_worker.id
to_port = 65535
type = "ingress"
}
resource "aws_security_group_rule" "eks_worker_ingress_managed_nodes" {
description = "Allow EC2 nodes to communicate with AWS managed nodes"
from_port = 0
protocol = "-1"
security_group_id = aws_security_group.eks_worker.id
source_security_group_id = aws_eks_cluster.main.vpc_config[0].cluster_security_group_id
to_port = 65535
type = "ingress"
}
resource "aws_security_group_rule" "managed_nodes_ingress_eks_worker" {
description = "Allow AWS managed nodes to communicate with EC2 nodes"
from_port = 0
protocol = "-1"
security_group_id = aws_eks_cluster.main.vpc_config[0].cluster_security_group_id
source_security_group_id = aws_security_group.eks_worker.id
to_port = 65535
type = "ingress"
}
resource "aws_security_group_rule" "eks_worker_ingress_cluster" {
description = "Allow worker Kubelets and pods to receive communication from the cluster control plane"
from_port = 1025
protocol = "tcp"
security_group_id = aws_security_group.eks_worker.id
source_security_group_id = aws_security_group.eks_master.id
to_port = 65535
type = "ingress"
}
resource "aws_security_group_rule" "eks_worker_ingress_https_from_master" {
description = "Allow pods to communicate with the cluster API Server"
from_port = 443
protocol = "tcp"
security_group_id = aws_security_group.eks_worker.id
source_security_group_id = aws_security_group.eks_master.id
to_port = 443
type = "ingress"
}
resource "aws_security_group_rule" "eks_master_ingress_https_from_workers" {
description = "Allow cluster control to receive communication from the worker Kubelets"
from_port = 443
protocol = "tcp"
security_group_id = aws_security_group.eks_master.id
source_security_group_id = aws_security_group.eks_worker.id
to_port = 443
type = "ingress"
}
resource "aws_security_group_rule" "eks_worker_ingress_nginx_from_vpc" {
count = var.helm_ingress_ngnix_enabled ? 1 : 0
description = "Allow VPC CIDR to access ingress port"
from_port = 32080
protocol = "tcp"
security_group_id = aws_security_group.eks_worker.id
cidr_blocks = [data.aws_vpc.main.cidr_block]
to_port = 32080
type = "ingress"
}