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Added AWS Account Role ARN support #5

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2 changes: 2 additions & 0 deletions examples/main.tf
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,8 @@ module "kubernetes" {
source = "scholzj/kubernetes/aws"

aws_region = "eu-central-1"
aws_role_arn = "arn:aws:iam::12345678900:role/terraform"

cluster_name = "aws-kubernetes"
master_instance_type = "t2.medium"
worker_instance_type = "t2.medium"
Expand Down
211 changes: 111 additions & 100 deletions main.tf
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,13 @@

# Retrieve AWS credentials from env variables AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY
provider "aws" {
alias = "kubernetes"
region = "${var.aws_region}"

assume_role {
session_name = "Terraform"
role_arn = "${var.aws_role_arn}"
}
}

#####
Expand All @@ -28,15 +34,16 @@ data "template_file" "master_policy_json" {
}

resource "aws_iam_policy" "master_policy" {
provider = "aws.kubernetes"
name = "${var.cluster_name}-master"
path = "/"
description = "Policy for role ${var.cluster_name}-master"
policy = "${data.template_file.master_policy_json.rendered}"
}

resource "aws_iam_role" "master_role" {
name = "${var.cluster_name}-master"

provider = "aws.kubernetes"
name = "${var.cluster_name}-master"
assume_role_policy = <<EOF
{
"Version": "2012-10-17",
Expand All @@ -55,14 +62,16 @@ EOF
}

resource "aws_iam_policy_attachment" "master-attach" {
provider = "aws.kubernetes"
name = "master-attachment"
roles = ["${aws_iam_role.master_role.name}"]
policy_arn = "${aws_iam_policy.master_policy.arn}"
}

resource "aws_iam_instance_profile" "master_profile" {
name = "${var.cluster_name}-master"
role = "${aws_iam_role.master_role.name}"
provider = "aws.kubernetes"
name = "${var.cluster_name}-master"
role = "${aws_iam_role.master_role.name}"
}

# Node
Expand All @@ -74,15 +83,16 @@ data "template_file" "node_policy_json" {
}

resource "aws_iam_policy" "node_policy" {
provider = "aws.kubernetes"
name = "${var.cluster_name}-node"
path = "/"
description = "Policy for role ${var.cluster_name}-node"
policy = "${data.template_file.node_policy_json.rendered}"
}

resource "aws_iam_role" "node_role" {
name = "${var.cluster_name}-node"

provider = "aws.kubernetes"
name = "${var.cluster_name}-node"
assume_role_policy = <<EOF
{
"Version": "2012-10-17",
Expand All @@ -101,14 +111,16 @@ EOF
}

resource "aws_iam_policy_attachment" "node-attach" {
provider = "aws.kubernetes"
name = "node-attachment"
roles = ["${aws_iam_role.node_role.name}"]
policy_arn = "${aws_iam_policy.node_policy.arn}"
}

resource "aws_iam_instance_profile" "node_profile" {
name = "${var.cluster_name}-node"
role = "${aws_iam_role.node_role.name}"
provider = "aws.kubernetes"
name = "${var.cluster_name}-node"
role = "${aws_iam_role.node_role.name}"
}

#####
Expand All @@ -117,56 +129,61 @@ resource "aws_iam_instance_profile" "node_profile" {

# Find VPC details based on Master subnet
data "aws_subnet" "cluster_subnet" {
id = "${var.master_subnet_id}"
provider = "aws.kubernetes"
id = "${var.master_subnet_id}"
}

resource "aws_security_group" "kubernetes" {
vpc_id = "${data.aws_subnet.cluster_subnet.vpc_id}"
name = "${var.cluster_name}"

tags = "${merge(map("Name", var.cluster_name, format("kubernetes.io/cluster/%v", var.cluster_name), "owned"), var.tags)}"
provider = "aws.kubernetes"
vpc_id = "${data.aws_subnet.cluster_subnet.vpc_id}"
name = "${var.cluster_name}"
tags = "${merge(map("Name", var.cluster_name, format("kubernetes.io/cluster/%v", var.cluster_name), "owned"), var.tags)}"
}

# Allow outgoing connectivity
resource "aws_security_group_rule" "allow_all_outbound_from_kubernetes" {
type = "egress"
from_port = 0
to_port = 0
protocol = "-1"
cidr_blocks = ["0.0.0.0/0"]
security_group_id = "${aws_security_group.kubernetes.id}"
provider = "aws.kubernetes"
type = "egress"
from_port = 0
to_port = 0
protocol = "-1"
cidr_blocks = ["0.0.0.0/0"]
security_group_id = "${aws_security_group.kubernetes.id}"
}

# Allow SSH connections only from specific CIDR (TODO)
resource "aws_security_group_rule" "allow_ssh_from_cidr" {
count = "${length(var.ssh_access_cidr)}"
type = "ingress"
from_port = 22
to_port = 22
protocol = "tcp"
cidr_blocks = ["${var.ssh_access_cidr[count.index]}"]
security_group_id = "${aws_security_group.kubernetes.id}"
provider = "aws.kubernetes"
count = "${length(var.ssh_access_cidr)}"
type = "ingress"
from_port = 22
to_port = 22
protocol = "tcp"
cidr_blocks = ["${var.ssh_access_cidr[count.index]}"]
security_group_id = "${aws_security_group.kubernetes.id}"
}

# Allow the security group members to talk with each other without restrictions
resource "aws_security_group_rule" "allow_cluster_crosstalk" {
type = "ingress"
from_port = 0
to_port = 0
protocol = "-1"
source_security_group_id = "${aws_security_group.kubernetes.id}"
security_group_id = "${aws_security_group.kubernetes.id}"
provider = "aws.kubernetes"
type = "ingress"
from_port = 0
to_port = 0
protocol = "-1"
source_security_group_id = "${aws_security_group.kubernetes.id}"
security_group_id = "${aws_security_group.kubernetes.id}"
}

# Allow API connections only from specific CIDR (TODO)
resource "aws_security_group_rule" "allow_api_from_cidr" {
count = "${length(var.api_access_cidr)}"
type = "ingress"
from_port = 6443
to_port = 6443
protocol = "tcp"
cidr_blocks = ["${var.api_access_cidr[count.index]}"]
security_group_id = "${aws_security_group.kubernetes.id}"
provider = "aws.kubernetes"
count = "${length(var.api_access_cidr)}"
type = "ingress"
from_port = 6443
to_port = 6443
protocol = "tcp"
cidr_blocks = ["${var.api_access_cidr[count.index]}"]
security_group_id = "${aws_security_group.kubernetes.id}"
}

##########
Expand Down Expand Up @@ -201,11 +218,11 @@ data "template_file" "init_node" {
}

data "template_file" "cloud_init_config" {
template = "${file("${path.module}/scripts/cloud-init-config.yaml")}"
template = "${file("${path.module}/scripts/cloud-init-config.yaml")}"

vars {
calico_yaml = "${base64gzip("${file("${path.module}/scripts/calico.yaml")}")}"
}
vars {
calico_yaml = "${base64gzip("${file("${path.module}/scripts/calico.yaml")}")}"
}
}

data "template_cloudinit_config" "master_cloud_init" {
Expand Down Expand Up @@ -241,7 +258,8 @@ data "template_cloudinit_config" "node_cloud_init" {
##########

resource "aws_key_pair" "keypair" {
key_name = "${var.cluster_name}"
provider = "aws.kubernetes"
key_name = "${var.cluster_name}"
public_key = "${file(var.ssh_public_key)}"
}

Expand All @@ -250,7 +268,8 @@ resource "aws_key_pair" "keypair" {
#####

data "aws_ami_ids" "centos7" {
owners = ["aws-marketplace"]
provider = "aws.kubernetes"
owners = ["aws-marketplace"]

filter {
name = "product-code"
Expand All @@ -273,46 +292,40 @@ data "aws_ami_ids" "centos7" {
#####

resource "aws_eip" "master" {
provider = "aws.kubernetes"
vpc = true
}

resource "aws_instance" "master" {
instance_type = "${var.master_instance_type}"

ami = "${data.aws_ami_ids.centos7.ids[0]}"

key_name = "${aws_key_pair.keypair.key_name}"

subnet_id = "${var.master_subnet_id}"
provider = "aws.kubernetes"
instance_type = "${var.master_instance_type}"
ami = "${data.aws_ami_ids.centos7.ids[0]}"
key_name = "${aws_key_pair.keypair.key_name}"
subnet_id = "${var.master_subnet_id}"
associate_public_ip_address = false
vpc_security_group_ids = ["${aws_security_group.kubernetes.id}"]
iam_instance_profile = "${aws_iam_instance_profile.master_profile.name}"
user_data = "${data.template_cloudinit_config.master_cloud_init.rendered}"

tags = "${merge(map("Name", join("-", list(var.cluster_name, "master")), format("kubernetes.io/cluster/%v", var.cluster_name), "owned"), var.tags)}"

associate_public_ip_address = false
root_block_device {
volume_type = "gp2"
volume_size = "50"
delete_on_termination = true
}

vpc_security_group_ids = [
"${aws_security_group.kubernetes.id}"
lifecycle {
ignore_changes = [
"ami",
"user_data",
"associate_public_ip_address"
]

iam_instance_profile = "${aws_iam_instance_profile.master_profile.name}"

user_data = "${data.template_cloudinit_config.master_cloud_init.rendered}"

tags = "${merge(map("Name", join("-", list(var.cluster_name, "master")), format("kubernetes.io/cluster/%v", var.cluster_name), "owned"), var.tags)}"

root_block_device {
volume_type = "gp2"
volume_size = "50"
delete_on_termination = true
}

lifecycle {
ignore_changes = [
"ami",
"user_data",
"associate_public_ip_address"
]
}
}
}

resource "aws_eip_association" "master_assoc" {
provider = "aws.kubernetes"
instance_id = "${aws_instance.master.id}"
allocation_id = "${aws_eip.master.id}"
}
Expand All @@ -322,19 +335,15 @@ resource "aws_eip_association" "master_assoc" {
#####

resource "aws_launch_configuration" "nodes" {
name = "${var.cluster_name}-nodes"
image_id = "${data.aws_ami_ids.centos7.ids[0]}"
instance_type = "${var.worker_instance_type}"
key_name = "${aws_key_pair.keypair.key_name}"
iam_instance_profile = "${aws_iam_instance_profile.node_profile.name}"

security_groups = [
"${aws_security_group.kubernetes.id}"
]

provider = "aws.kubernetes"
name = "${var.cluster_name}-nodes"
image_id = "${data.aws_ami_ids.centos7.ids[0]}"
instance_type = "${var.worker_instance_type}"
key_name = "${aws_key_pair.keypair.key_name}"
iam_instance_profile = "${aws_iam_instance_profile.node_profile.name}"
security_groups = ["${aws_security_group.kubernetes.id}"]
associate_public_ip_address = true

user_data = "${data.template_cloudinit_config.node_cloud_init.rendered}"
user_data = "${data.template_cloudinit_config.node_cloud_init.rendered}"

root_block_device {
volume_type = "gp2"
Expand All @@ -345,19 +354,19 @@ resource "aws_launch_configuration" "nodes" {
lifecycle {
create_before_destroy = true
ignore_changes = [
"user_data"
"user_data"
]
}
}

resource "aws_autoscaling_group" "nodes" {
vpc_zone_identifier = ["${var.worker_subnet_ids}"]

name = "${var.cluster_name}-nodes"
max_size = "${var.max_worker_count}"
min_size = "${var.min_worker_count}"
desired_capacity = "${var.min_worker_count}"
launch_configuration = "${aws_launch_configuration.nodes.name}"
provider = "aws.kubernetes"
vpc_zone_identifier = ["${var.worker_subnet_ids}"]
name = "${var.cluster_name}-nodes"
max_size = "${var.max_worker_count}"
min_size = "${var.min_worker_count}"
desired_capacity = "${var.min_worker_count}"
launch_configuration = "${aws_launch_configuration.nodes.name}"

tags = [{
key = "Name"
Expand All @@ -379,14 +388,16 @@ resource "aws_autoscaling_group" "nodes" {
#####

data "aws_route53_zone" "dns_zone" {
provider = "aws.kubernetes"
name = "${var.hosted_zone}."
private_zone = "${var.hosted_zone_private}"
}

resource "aws_route53_record" "master" {
zone_id = "${data.aws_route53_zone.dns_zone.zone_id}"
name = "${var.cluster_name}.${var.hosted_zone}"
type = "A"
records = ["${aws_eip.master.public_ip}"]
ttl = 300
provider = "aws.kubernetes"
zone_id = "${data.aws_route53_zone.dns_zone.zone_id}"
name = "${var.cluster_name}.${var.hosted_zone}"
type = "A"
records = ["${aws_eip.master.public_ip}"]
ttl = 300
}
4 changes: 4 additions & 0 deletions variables.tf
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Original file line number Diff line number Diff line change
@@ -1,3 +1,7 @@
variable "aws_role_arn" {
description = "Account Role ARN where Cloud Formation is created"
}

variable "aws_region" {
description = "Region where Cloud Formation is created"
default = "eu-central-1"
Expand Down