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feat: Allow security group rules to reference the security group created by the module #51

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Merged
merged 4 commits into from
Sep 25, 2025
Merged

feat: Allow security group rules to reference the security group created by the module #51

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d8e90e2
allow SG rules to reference self SG
FlorinAndrei Sep 19, 2025
5afa22e
add example for the "self" rule
FlorinAndrei Sep 19, 2025
a5ccd27
remove VPC block from example
FlorinAndrei Sep 19, 2025
b4e363a
fix: Execute `pre-commit run -a`
bryantbiggs Sep 25, 2025
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9 changes: 4 additions & 5 deletions examples/redis-cluster/main.tf
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Expand Up @@ -38,11 +38,10 @@ module "elasticache" {
# Security Group
vpc_id = module.vpc.vpc_id
security_group_rules = {
ingress_vpc = {
# Default type is `ingress`
# Default port is based on the default engine port
description = "VPC traffic"
cidr_ipv4 = module.vpc.vpc_cidr_block
ingress-self-redis = {
type = "ingress"
referenced_security_group_id = "self"
description = "Allow traffic from this security group to itself."
}
}

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4 changes: 2 additions & 2 deletions main.tf
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Expand Up @@ -330,7 +330,7 @@ resource "aws_vpc_security_group_ingress_rule" "this" {
description = try(each.value.description, null)
from_port = try(each.value.from_port, local.port)
prefix_list_id = lookup(each.value, "prefix_list_id", null)
referenced_security_group_id = lookup(each.value, "referenced_security_group_id", null)
referenced_security_group_id = lookup(each.value, "referenced_security_group_id", null) == "self" ? aws_security_group.this[0].id : lookup(each.value, "referenced_security_group_id", null)
to_port = try(each.value.to_port, local.port)

tags = merge(local.tags, var.security_group_tags, try(each.value.tags, {}))
Expand All @@ -349,7 +349,7 @@ resource "aws_vpc_security_group_egress_rule" "this" {
description = try(each.value.description, null)
from_port = try(each.value.from_port, null)
prefix_list_id = lookup(each.value, "prefix_list_id", null)
referenced_security_group_id = lookup(each.value, "referenced_security_group_id", null)
referenced_security_group_id = lookup(each.value, "referenced_security_group_id", null) == "self" ? aws_security_group.this[0].id : lookup(each.value, "referenced_security_group_id", null)
to_port = try(each.value.to_port, null)

tags = merge(local.tags, var.security_group_tags, try(each.value.tags, {}))
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