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feat: Add support for enabling EFA resources (#2936)

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* feat: Add support for enabling EFA resources

* feat: Add support for creating placement group and ensuring subnet ID used supports the instance type provided

* chore: Update README and examples

* feat: Update AWS provider MSV to support `maximum_network_cards` attribute

* fix: Update self-managed example after last round of testing; improve EFA support wording
This commit is contained in:
Bryant Biggs
2024-02-23 09:29:10 -05:00
committed by GitHub
parent 6a1e124e99
commit 7f472ec660
30 changed files with 366 additions and 50 deletions
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96
modules/eks-managed-node-group/main.tf
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@@ -24,6 +24,33 @@ module "user_data" {
user_data_template_path = var.user_data_template_path
}
################################################################################
# EFA Support
################################################################################
data "aws_ec2_instance_type" "this" {
count = var.enable_efa_support ? 1 : 0
instance_type = local.efa_instance_type
}
locals {
efa_instance_type = try(element(var.instance_types, 0), "")
num_network_cards = try(data.aws_ec2_instance_type.this[0].maximum_network_cards, 0)
efa_network_interfaces = [
for i in range(local.num_network_cards) : {
associate_public_ip_address = false
delete_on_termination = true
device_index = i == 0 ? 0 : 1
network_card_index = i
interface_type = "efa"
}
]
network_interfaces = var.enable_efa_support ? local.efa_network_interfaces : var.network_interfaces
}
################################################################################
# Launch template
################################################################################
@@ -31,6 +58,8 @@ module "user_data" {
locals {
launch_template_name = coalesce(var.launch_template_name, "${var.name}-eks-node-group")
security_group_ids = compact(concat([var.cluster_primary_security_group_id], var.vpc_security_group_ids))
placement = var.create && var.enable_efa_support ? { group_name = aws_placement_group.this[0].name } : var.placement
}
resource "aws_launch_template" "this" {
@@ -215,7 +244,8 @@ resource "aws_launch_template" "this" {
name_prefix = var.launch_template_use_name_prefix ? "${local.launch_template_name}-" : null
dynamic "network_interfaces" {
for_each = var.network_interfaces
for_each = local.network_interfaces
content {
associate_carrier_ip_address = try(network_interfaces.value.associate_carrier_ip_address, null)
associate_public_ip_address = try(network_interfaces.value.associate_public_ip_address, null)
@@ -243,14 +273,14 @@ resource "aws_launch_template" "this" {
}
dynamic "placement" {
for_each = length(var.placement) > 0 ? [var.placement] : []
for_each = length(local.placement) > 0 ? [local.placement] : []
content {
affinity = try(placement.value.affinity, null)
availability_zone = try(placement.value.availability_zone, null)
group_name = try(placement.value.group_name, null)
host_id = try(placement.value.host_id, null)
host_resource_group_arn = try(placement.value.host_resource_group_arn, null)
availability_zone = lookup(placement.value, "availability_zone", null)
group_name = lookup(placement.value, "group_name", null)
host_id = lookup(placement.value, "host_id", null)
host_resource_group_arn = lookup(placement.value, "host_resource_group_arn", null)
partition_number = try(placement.value.partition_number, null)
spread_domain = try(placement.value.spread_domain, null)
tenancy = try(placement.value.tenancy, null)
@@ -280,7 +310,7 @@ resource "aws_launch_template" "this" {
update_default_version = var.update_launch_template_default_version
user_data = module.user_data.user_data
vpc_security_group_ids = length(var.network_interfaces) > 0 ? [] : local.security_group_ids
vpc_security_group_ids = length(local.network_interfaces) > 0 ? [] : local.security_group_ids
tags = var.tags
@@ -311,7 +341,7 @@ resource "aws_eks_node_group" "this" {
# Required
cluster_name = var.cluster_name
node_role_arn = var.create_iam_role ? aws_iam_role.this[0].arn : var.iam_role_arn
subnet_ids = var.subnet_ids
subnet_ids = var.enable_efa_support ? data.aws_subnets.efa[0].ids : var.subnet_ids
scaling_config {
min_size = var.min_size
@@ -448,6 +478,56 @@ resource "aws_iam_role_policy_attachment" "additional" {
role = aws_iam_role.this[0].name
}
################################################################################
# Placement Group
################################################################################
resource "aws_placement_group" "this" {
count = var.create && var.enable_efa_support ? 1 : 0
name = "${var.cluster_name}-${var.name}"
strategy = "cluster"
tags = var.tags
}
################################################################################
# Instance AZ Lookup
# Instances usually used in placement groups w/ EFA are only available in
# select availability zones. These data sources will cross reference the availability
# zones supported by the instance type with the subnets provided to ensure only
# AZs/subnets that are supported are used.
################################################################################
# Find the availability zones supported by the instance type
data "aws_ec2_instance_type_offerings" "this" {
count = var.create && var.enable_efa_support ? 1 : 0
filter {
name = "instance-type"
values = [local.efa_instance_type]
}
location_type = "availability-zone-id"
}
# Reverse the lookup to find one of the subnets provided based on the availability
# availability zone ID of the queried instance type (supported)
data "aws_subnets" "efa" {
count = var.create && var.enable_efa_support ? 1 : 0
filter {
name = "subnet-id"
values = var.subnet_ids
}
filter {
name = "availability-zone-id"
values = data.aws_ec2_instance_type_offerings.this[0].locations
}
}
################################################################################
# Autoscaling Group Schedule
################################################################################