b3745f2614
* Properly tag instances and subnets with `kubernetes.io/cluster/$cluster_name` This is required by kubernetes to support multiple clusters in a single vpc/az * Get rid of loadbalancer_apiserver_address as it is no longer needed
142 lines
4.2 KiB
HCL
142 lines
4.2 KiB
HCL
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resource "aws_vpc" "cluster-vpc" {
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cidr_block = "${var.aws_vpc_cidr_block}"
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#DNS Related Entries
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enable_dns_support = true
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enable_dns_hostnames = true
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tags = "${merge(var.default_tags, map(
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"Name", "kubernetes-${var.aws_cluster_name}-vpc"
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))}"
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}
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resource "aws_eip" "cluster-nat-eip" {
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count = "${length(var.aws_cidr_subnets_public)}"
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vpc = true
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}
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resource "aws_internet_gateway" "cluster-vpc-internetgw" {
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vpc_id = "${aws_vpc.cluster-vpc.id}"
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tags = "${merge(var.default_tags, map(
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"Name", "kubernetes-${var.aws_cluster_name}-internetgw"
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))}"
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}
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resource "aws_subnet" "cluster-vpc-subnets-public" {
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vpc_id = "${aws_vpc.cluster-vpc.id}"
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count="${length(var.aws_avail_zones)}"
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availability_zone = "${element(var.aws_avail_zones, count.index)}"
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cidr_block = "${element(var.aws_cidr_subnets_public, count.index)}"
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tags = "${merge(var.default_tags, map(
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"Name", "kubernetes-${var.aws_cluster_name}-${element(var.aws_avail_zones, count.index)}-public",
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"kubernetes.io/cluster/${var.aws_cluster_name}", "member"
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))}"
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}
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resource "aws_nat_gateway" "cluster-nat-gateway" {
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count = "${length(var.aws_cidr_subnets_public)}"
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allocation_id = "${element(aws_eip.cluster-nat-eip.*.id, count.index)}"
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subnet_id = "${element(aws_subnet.cluster-vpc-subnets-public.*.id, count.index)}"
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}
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resource "aws_subnet" "cluster-vpc-subnets-private" {
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vpc_id = "${aws_vpc.cluster-vpc.id}"
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count="${length(var.aws_avail_zones)}"
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availability_zone = "${element(var.aws_avail_zones, count.index)}"
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cidr_block = "${element(var.aws_cidr_subnets_private, count.index)}"
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tags = "${merge(var.default_tags, map(
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"Name", "kubernetes-${var.aws_cluster_name}-${element(var.aws_avail_zones, count.index)}-private"
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))}"
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}
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#Routing in VPC
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#TODO: Do we need two routing tables for each subnet for redundancy or is one enough?
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resource "aws_route_table" "kubernetes-public" {
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vpc_id = "${aws_vpc.cluster-vpc.id}"
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route {
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cidr_block = "0.0.0.0/0"
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gateway_id = "${aws_internet_gateway.cluster-vpc-internetgw.id}"
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}
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tags = "${merge(var.default_tags, map(
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"Name", "kubernetes-${var.aws_cluster_name}-routetable-public"
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))}"
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}
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resource "aws_route_table" "kubernetes-private" {
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count = "${length(var.aws_cidr_subnets_private)}"
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vpc_id = "${aws_vpc.cluster-vpc.id}"
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route {
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cidr_block = "0.0.0.0/0"
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nat_gateway_id = "${element(aws_nat_gateway.cluster-nat-gateway.*.id, count.index)}"
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}
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tags = "${merge(var.default_tags, map(
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"Name", "kubernetes-${var.aws_cluster_name}-routetable-private-${count.index}"
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))}"
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}
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resource "aws_route_table_association" "kubernetes-public" {
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count = "${length(var.aws_cidr_subnets_public)}"
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subnet_id = "${element(aws_subnet.cluster-vpc-subnets-public.*.id,count.index)}"
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route_table_id = "${aws_route_table.kubernetes-public.id}"
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}
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resource "aws_route_table_association" "kubernetes-private" {
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count = "${length(var.aws_cidr_subnets_private)}"
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subnet_id = "${element(aws_subnet.cluster-vpc-subnets-private.*.id,count.index)}"
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route_table_id = "${element(aws_route_table.kubernetes-private.*.id,count.index)}"
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}
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#Kubernetes Security Groups
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resource "aws_security_group" "kubernetes" {
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name = "kubernetes-${var.aws_cluster_name}-securitygroup"
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vpc_id = "${aws_vpc.cluster-vpc.id}"
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tags = "${merge(var.default_tags, map(
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"Name", "kubernetes-${var.aws_cluster_name}-securitygroup"
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))}"
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}
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resource "aws_security_group_rule" "allow-all-ingress" {
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type = "ingress"
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from_port = 0
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to_port = 65535
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protocol = "-1"
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cidr_blocks= ["${var.aws_vpc_cidr_block}"]
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security_group_id = "${aws_security_group.kubernetes.id}"
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}
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resource "aws_security_group_rule" "allow-all-egress" {
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type = "egress"
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from_port = 0
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to_port = 65535
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protocol = "-1"
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cidr_blocks = ["0.0.0.0/0"]
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security_group_id = "${aws_security_group.kubernetes.id}"
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}
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resource "aws_security_group_rule" "allow-ssh-connections" {
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type = "ingress"
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from_port = 22
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to_port = 22
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protocol = "TCP"
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cidr_blocks = ["0.0.0.0/0"]
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security_group_id = "${aws_security_group.kubernetes.id}"
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}
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