Merge pull request #40 from JustFiesta/add-argocd-sec-groups

Add dev security groups for argocd access to backend pods

Author: JustFiesta

terraform/environments/dev/security-groups.tf

@@ -0,0 +1,72 @@
+data "aws_security_groups" "backend_sg" {
+  filter {
+    name   = "tag:service.eks.amazonaws.com/resource"
+    values = ["ManagedBackendSecurityGroup"]
+  }
+
+  filter {
+    name   = "vpc-id"
+    values = [module.vpc.vpc_id]
+  }
+
+  depends_on = [module.eks]
+}
+
+data "aws_security_groups" "argocd_lb_sg" {
+  filter {
+    name   = "tag:service.eks.amazonaws.com/stack"
+    values = ["argocd/argocd-server"]
+  }
+
+  filter {
+    name   = "vpc-id"
+    values = [module.vpc.vpc_id]
+  }
+
+  depends_on = [helm_release.argocd]
+}
+
+resource "aws_security_group_rule" "argocd_backend_from_lb" {
+  type                     = "ingress"
+  from_port                = 8080
+  to_port                  = 8080
+  protocol                 = "tcp"
+  source_security_group_id = tolist(data.aws_security_groups.argocd_lb_sg.ids)[0]
+  security_group_id        = tolist(data.aws_security_groups.backend_sg.ids)[0]
+  description              = "Allow ArgoCD LoadBalancer to reach ArgoCD server pods"
+}
+
+# Optional for tests: NGINX ingress controller
+data "aws_security_groups" "nginx_lb_sg" {
+  filter {
+    name   = "tag:service.eks.amazonaws.com/stack"
+    values = ["ingress-nginx/ingress-nginx-controller"]
+  }
+
+  filter {
+    name   = "vpc-id"
+    values = [module.vpc.vpc_id]
+  }
+
+  depends_on = [helm_release.nginx_ingress]
+}
+
+resource "aws_security_group_rule" "nginx_backend_from_lb_http" {
+  type                     = "ingress"
+  from_port                = 80
+  to_port                  = 80
+  protocol                 = "tcp"
+  source_security_group_id = tolist(data.aws_security_groups.nginx_lb_sg.ids)[0]
+  security_group_id        = tolist(data.aws_security_groups.backend_sg.ids)[0]
+  description              = "Allow NGINX LoadBalancer to reach NGINX ingress pods (HTTP)"
+}
+
+resource "aws_security_group_rule" "nginx_backend_from_lb_https" {
+  type                     = "ingress"
+  from_port                = 443
+  to_port                  = 443
+  protocol                 = "tcp"
+  source_security_group_id = tolist(data.aws_security_groups.nginx_lb_sg.ids)[0]
+  security_group_id        = tolist(data.aws_security_groups.backend_sg.ids)[0]
+  description              = "Allow NGINX LoadBalancer to reach NGINX ingress pods (HTTPS)"
+}