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security.tf
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security.tf
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# Copyright © 2021-2023, SAS Institute Inc., Cary, NC, USA. All Rights Reserved.
# SPDX-License-Identifier: Apache-2.0
data "aws_security_group" "sg" {
count = var.security_group_id == null ? 0 : 1
id = var.security_group_id
}
# Security Groups - https://www.terraform.io/docs/providers/aws/r/security_group.html
resource "aws_security_group" "sg_a" {
count = var.security_group_id == null && var.vpc_private_endpoints_enabled == false ? 1 : 0
name = "${var.prefix}-sg"
vpc_id = module.vpc.vpc_id
description = "Auxiliary security group associated with RDS ENIs and VPC Endpoint ENIs as well as Jump/NFS VM ENIs when they have public IPs"
egress {
description = "Allow all outbound traffic."
from_port = 0
to_port = 0
protocol = "-1"
cidr_blocks = ["0.0.0.0/0"]
}
tags = merge(local.tags, { "Name" : "${var.prefix}-sg" })
}
# Security Groups - https://www.terraform.io/docs/providers/aws/r/security_group.html
resource "aws_security_group" "sg_b" {
count = var.security_group_id == null && var.vpc_private_endpoints_enabled ? 1 : 0
name = "${var.prefix}-sg"
vpc_id = module.vpc.vpc_id
description = "Auxiliary security group associated with RDS ENIs and VPC Endpoint ENIs as well as Jump/NFS VM ENIs when they have public IPs"
egress {
description = "Allow all outbound traffic."
from_port = 0
to_port = 0
protocol = "-1"
cidr_blocks = ["0.0.0.0/0"]
}
ingress {
description = "Allow tcp port 443 ingress to all AWS Services targeted by the VPC endpoints"
from_port = 443
to_port = 443
protocol = "tcp"
cidr_blocks = local.vpc_endpoint_private_access_cidrs
}
tags = merge(local.tags, { "Name" : "${var.prefix}-sg" })
}
resource "aws_security_group_rule" "vms" {
count = (length(local.vm_public_access_cidrs) > 0
&& var.security_group_id == null
&& ((var.create_jump_public_ip && var.create_jump_vm)
|| (var.create_nfs_public_ip && var.storage_type == "standard")
)
? 1 : 0
)
type = "ingress"
description = "Allow SSH from source"
from_port = 22
to_port = 22
protocol = "tcp"
cidr_blocks = local.vm_public_access_cidrs
security_group_id = local.security_group_id
}
resource "aws_security_group_rule" "all" {
type = "ingress"
description = "Allow internal security group communication."
from_port = 0
to_port = 0
protocol = "all"
security_group_id = local.security_group_id
self = true
}
resource "aws_security_group_rule" "postgres_internal" {
for_each = local.postgres_sgr_ports != null ? toset(local.postgres_sgr_ports) : toset([])
type = "ingress"
description = "Allow Postgres within network"
from_port = each.key
to_port = each.key
protocol = "tcp"
self = true
security_group_id = local.security_group_id
}
resource "aws_security_group_rule" "postgres_external" {
for_each = (length(local.postgres_public_access_cidrs) > 0
? local.postgres_sgr_ports != null
? toset(local.postgres_sgr_ports)
: toset([])
: toset([])
)
type = "ingress"
description = "Allow Postgres from source"
from_port = each.key
to_port = each.key
protocol = "tcp"
cidr_blocks = local.postgres_public_access_cidrs
security_group_id = local.security_group_id
}
resource "aws_security_group" "cluster_security_group" {
name = "${var.prefix}-eks_cluster_sg"
vpc_id = module.vpc.vpc_id
tags = merge(local.tags, { "Name" : "${var.prefix}-eks_cluster_sg" })
count = var.cluster_security_group_id == null ? 1 : 0
description = "EKS cluster security group."
egress {
description = "Allow all outbound traffic."
from_port = 0
to_port = 0
protocol = "-1"
cidr_blocks = ["0.0.0.0/0"]
}
ingress {
description = "Allow additional HTTPS/443 ingress to private EKS cluster API server endpoint per var.cluster_endpoint_private_access_cidrs"
from_port = 443
to_port = 443
protocol = "tcp"
cidr_blocks = local.cluster_endpoint_private_access_cidrs
}
}
resource "aws_security_group_rule" "cluster_ingress" {
count = var.cluster_security_group_id == null ? 1 : 0
type = "ingress"
description = "Allow pods to communicate with the EKS cluster API."
from_port = 443
to_port = 443
protocol = "tcp"
source_security_group_id = local.workers_security_group_id
security_group_id = local.cluster_security_group_id
}
resource "aws_security_group" "workers_security_group" {
name = "${var.prefix}-eks_worker_sg"
vpc_id = module.vpc.vpc_id
tags = merge(local.tags,
{ "Name" : "${var.prefix}-eks_worker_sg" },
{ "kubernetes.io/cluster/${local.cluster_name}" : "owned" }
)
count = var.workers_security_group_id == null ? 1 : 0
description = "Security group for all nodes in the cluster."
egress = [
{
cidr_blocks = [
"0.0.0.0/0",
]
ipv6_cidr_blocks = []
prefix_list_ids = []
self = false
security_groups = []
description = "Allow cluster egress access to the Internet."
from_port = 0
to_port = 0
protocol = "-1"
},
]
}
resource "aws_security_group_rule" "worker_self" {
count = var.workers_security_group_id == null ? 1 : 0
type = "ingress"
description = "Allow node to communicate with each other."
from_port = 0
protocol = "-1"
self = true
to_port = 0
security_group_id = aws_security_group.workers_security_group[0].id
}
resource "aws_security_group_rule" "worker_cluster_api" {
count = var.workers_security_group_id == null ? 1 : 0
type = "ingress"
description = "Allow worker pods to receive communication from the cluster control plane."
from_port = 1025
protocol = "tcp"
source_security_group_id = local.cluster_security_group_id
to_port = 65535
security_group_id = aws_security_group.workers_security_group[0].id
}
resource "aws_security_group_rule" "worker_cluster_api_443" {
count = var.workers_security_group_id == null ? 1 : 0
type = "ingress"
description = "Allow pods running extension API servers on port 443 to receive communication from cluster control plane."
from_port = 443
protocol = "tcp"
source_security_group_id = local.cluster_security_group_id
to_port = 443
security_group_id = aws_security_group.workers_security_group[0].id
}
resource "aws_security_group_rule" "vm_private_access_22" {
count = (length(local.vm_private_access_cidrs) > 0
&& var.workers_security_group_id == null
&& ((var.create_jump_public_ip == false && var.create_jump_vm)
|| (var.create_nfs_public_ip == false && var.storage_type == "standard")
)
? 1 : 0
)
type = "ingress"
description = "Allow SSH to a private IP based Jump VM per var.vm_private_access_cidrs. Required for DAC baseline client VM."
from_port = 22
to_port = 22
protocol = "tcp"
cidr_blocks = local.vm_private_access_cidrs
security_group_id = aws_security_group.workers_security_group[0].id
}