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elbv2_splunk.tf
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elbv2_splunk.tf
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resource "aws_lb" "splunk_alb" {
name = "splunk-alb"
load_balancer_type = "application"
security_groups = [
aws_security_group.splunk_alb.id
]
subnets = [
module.vpc.subnet_public1,
module.vpc.subnet_public2,
module.vpc.subnet_public3
]
}
resource "aws_lb_listener" "splunk_console_http" {
load_balancer_arn = aws_lb.splunk_alb.arn
port = 80
protocol = "HTTP"
default_action {
type = "forward"
target_group_arn = aws_lb_target_group.splunk_alb_console.arn
}
}
resource "aws_lb_listener" "splunk_hec" {
load_balancer_arn = aws_lb.splunk_alb.arn
port = 8088
protocol = "HTTP"
default_action {
type = "forward"
target_group_arn = aws_lb_target_group.splunk_alb_hec.arn
}
}
resource "aws_lb_target_group" "splunk_alb_hec" {
vpc_id = module.vpc.vpc_id
name = "splunk-tg-hec"
port = 8088
protocol = "HTTP"
target_type = "ip"
deregistration_delay = 0
health_check {
path = "/services/collector/health"
healthy_threshold = 2
interval = 5
timeout = 2
}
}
resource "aws_lb_target_group" "splunk_alb_console" {
vpc_id = module.vpc.vpc_id
name = "splunk-tg-console"
port = 8000
protocol = "HTTP"
target_type = "ip"
deregistration_delay = 0
health_check {
matcher = "200-399"
healthy_threshold = 2
interval = 5
timeout = 2
}
}
resource "aws_security_group" "splunk_alb" {
vpc_id = module.vpc.vpc_id
name = "splunk-alb"
}
resource "aws_security_group_rule" "splunk_alb_egress_all" {
security_group_id = aws_security_group.splunk_alb.id
type = "egress"
from_port = 0
to_port = 0
protocol = "-1"
cidr_blocks = ["0.0.0.0/0"]
}
resource "aws_security_group_rule" "splunk_alb_ingress_80_admin" {
security_group_id = aws_security_group.splunk_alb.id
type = "ingress"
protocol = "tcp"
from_port = 80
to_port = 80
cidr_blocks = [var.admin_cidr]
}
resource "aws_security_group_rule" "splunk_alb_ingress_8088_admin" {
security_group_id = aws_security_group.splunk_alb.id
type = "ingress"
protocol = "tcp"
from_port = 8088
to_port = 8088
cidr_blocks = [var.admin_cidr]
}
resource "aws_security_group_rule" "splunk_alb_ingress_hec_vpc" {
type = "ingress"
protocol = "tcp"
from_port = 8088
to_port = 8088
cidr_blocks = ["10.0.0.0/16"]
security_group_id = aws_security_group.splunk_alb.id
}
resource "aws_security_group_rule" "splunk_alb_ingress_hec_cloudfront" {
security_group_id = aws_security_group.splunk_alb.id
type = "ingress"
protocol = "tcp"
# hack - ideally there's be a rule for 80-80 and 8080-8080 but was hitting max Rules per SG
from_port = 80
to_port = 8088
prefix_list_ids = [data.aws_ec2_managed_prefix_list.cloudfront_origin_facing.id]
}
#resource "aws_security_group_rule" "splunk_alb_ingress_console_all" {
# security_group_id = aws_security_group.splunk_alb.id
# type = "ingress"
# protocol = "tcp"
# from_port = 80
# to_port = 80
#
# cidr_blocks = ["0.0.0.0/0"]
#}
#
#resource "aws_security_group_rule" "splunk_alb_ingress_hec_all" {
# security_group_id = aws_security_group.splunk_alb.id
# type = "ingress"
# protocol = "tcp"
# from_port = 8080
# to_port = 8080
#
# cidr_blocks = ["0.0.0.0/0"]
#}
data "aws_ec2_managed_prefix_list" "cloudfront_origin_facing" {
filter {
name = "prefix-list-name"
values = ["com.amazonaws.global.cloudfront.origin-facing"]
}
}