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feat: add default networkpolicies #168

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Merged
merged 3 commits into from
Nov 9, 2021
Merged

feat: add default networkpolicies #168

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7e735c5
add default networkpolicies
mglotov Nov 8, 2021
bad1aa9
merge changes from master to resolve conflicts
mglotov Nov 8, 2021
3242498
resolve tfsec complains
mglotov Nov 9, 2021
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171 changes: 121 additions & 50 deletions README.md
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3 changes: 3 additions & 0 deletions docs/FAQ.md
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Original file line number Diff line number Diff line change
Expand Up @@ -100,6 +100,7 @@ module "test_namespace" {
{
name = "allow-this-namespace"
policy_types = ["Ingress"]
pod_selector = {}
ingress = {
from = [
{
Expand All @@ -115,6 +116,7 @@ module "test_namespace" {
{
name = "allow-from-ingress-namespace"
policy_types = ["Ingress"]
pod_selector = {}
ingress = {
from = [
{
Expand All @@ -130,6 +132,7 @@ module "test_namespace" {
{
name = "allow-egress-to-dev"
policy_type = ["Egress"]
pod_selector = {}
egress = {
ports = [
{
Expand Down
97 changes: 83 additions & 14 deletions terraform/layer2-k8s/eks-aws-loadbalancer-controller.tf
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Expand Up @@ -13,23 +13,77 @@ locals {
})
}

#tfsec:ignore:kubernetes-network-no-public-egress tfsec:ignore:kubernetes-network-no-public-ingress
module "aws_load_balancer_controller_namespace" {
source = "../modules/kubernetes-namespace"
name = "aws-load-balancer-controller"
}

resource "helm_release" "aws_loadbalancer_controller" {
count = var.aws_loadbalancer_controller_enable ? 1 : 0

name = "aws-load-balancer-controller"
chart = local.aws-load-balancer-controller.chart
repository = local.aws-load-balancer-controller.repository
version = local.aws-load-balancer-controller.chart_version
namespace = module.aws_load_balancer_controller_namespace.name
max_history = var.helm_release_history_size

values = [
local.alb_ingress_controller
source = "../modules/kubernetes-namespace"
name = "aws-load-balancer-controller"
network_policies = [
{
name = "default-deny"
policy_types = ["Ingress", "Egress"]
pod_selector = {}
},
{
name = "allow-this-namespace"
policy_types = ["Ingress"]
pod_selector = {}
ingress = {
from = [
{
namespace_selector = {
match_labels = {
name = "aws-load-balancer-controller"
}
}
}
]
}
},
{
name = "allow-control-plane"
policy_types = ["Ingress"]
pod_selector = {
match_expressions = {
key = "app.kubernetes.io/name"
operator = "In"
values = ["aws-load-balancer-controller"]
}
}
ingress = {
ports = [
{
port = "9443"
protocol = "TCP"
}
]
from = [
{
ip_block = {
cidr = "0.0.0.0/0"
}
}
]
}
},
{
name = "allow-egress"
policy_types = ["Egress"]
pod_selector = {}
egress = {
to = [
{
ip_block = {
cidr = "0.0.0.0/0"
except = [
"169.254.169.254/32"
]
}
}
]
}
}
]
}

Expand Down Expand Up @@ -249,3 +303,18 @@ module "aws_iam_aws_loadbalancer_controller" {
]
})
}

resource "helm_release" "aws_loadbalancer_controller" {
count = var.aws_loadbalancer_controller_enable ? 1 : 0

name = "aws-load-balancer-controller"
chart = local.aws-load-balancer-controller.chart
repository = local.aws-load-balancer-controller.repository
version = local.aws-load-balancer-controller.chart_version
namespace = module.aws_load_balancer_controller_namespace[count.index].name
max_history = var.helm_release_history_size

values = [
local.alb_ingress_controller
]
}
41 changes: 41 additions & 0 deletions terraform/layer2-k8s/eks-aws-node-termination-handler.tf
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Original file line number Diff line number Diff line change
Expand Up @@ -6,9 +6,50 @@ locals {
}
}

#tfsec:ignore:kubernetes-network-no-public-egress tfsec:ignore:kubernetes-network-no-public-ingress
module "aws_node_termination_handler_namespace" {
source = "../modules/kubernetes-namespace"
name = "aws-node-termination-handler"
network_policies = [
{
name = "default-deny"
policy_types = ["Ingress", "Egress"]
pod_selector = {}
},
{
name = "allow-this-namespace"
policy_types = ["Ingress"]
pod_selector = {}
ingress = {
from = [
{
namespace_selector = {
match_labels = {
name = "aws-node-termination-handler"
}
}
}
]
}
},
{
name = "allow-egress"
policy_types = ["Egress"]
pod_selector = {}
egress = {
to = [
{
ip_block = {
cidr = "0.0.0.0/0"
except = [
"169.254.169.254/32"
]
}
}
]
}
}
]
}

resource "helm_release" "aws_node_termination_handler" {
Expand Down
95 changes: 81 additions & 14 deletions terraform/layer2-k8s/eks-cert-manager.tf
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Original file line number Diff line number Diff line change
Expand Up @@ -14,23 +14,76 @@ data "template_file" "cert_manager" {
}
}

resource "helm_release" "cert_manager" {
name = "cert-manager"
chart = local.cert-manager.chart
repository = local.cert-manager.repository
version = local.cert-manager.chart_version
namespace = module.certmanager_namespace.name
wait = true
max_history = var.helm_release_history_size

values = [
data.template_file.cert_manager.rendered,
]
}

#tfsec:ignore:kubernetes-network-no-public-egress tfsec:ignore:kubernetes-network-no-public-ingress
module "certmanager_namespace" {
source = "../modules/kubernetes-namespace"
name = "certmanager"
network_policies = [
{
name = "default-deny"
policy_types = ["Ingress", "Egress"]
pod_selector = {}
},
{
name = "allow-this-namespace"
policy_types = ["Ingress"]
pod_selector = {}
ingress = {
from = [
{
namespace_selector = {
match_labels = {
name = "certmanager"
}
}
}
]
}
},
{
name = "allow-control-plane"
policy_types = ["Ingress"]
pod_selector = {
match_expressions = {
key = "app.kubernetes.io/name"
operator = "In"
values = ["webhook"]
}
}
ingress = {
ports = [
{
port = "10250"
protocol = "TCP"
}
]
from = [
{
ip_block = {
cidr = "0.0.0.0/0"
}
}
]
}
},
{
name = "allow-egress"
policy_types = ["Egress"]
pod_selector = {}
egress = {
to = [
{
ip_block = {
cidr = "0.0.0.0/0"
except = [
"169.254.169.254/32"
]
}
}
]
}
}
]
}

#tfsec:ignore:aws-iam-no-policy-wildcards
Expand Down Expand Up @@ -73,3 +126,17 @@ module "aws_iam_cert_manager" {
]
})
}

resource "helm_release" "cert_manager" {
name = "cert-manager"
chart = local.cert-manager.chart
repository = local.cert-manager.repository
version = local.cert-manager.chart_version
namespace = module.certmanager_namespace.name
wait = true
max_history = var.helm_release_history_size

values = [
data.template_file.cert_manager.rendered,
]
}
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