deploy kubernetes ingress with terraform - kubernetes

Question

I'm trying deploy kubernetes ingress with terraform.
As described here link and my own variant:
resource "kubernetes_ingress" "node" {
metadata {
name = "node"
}
spec {
ingress_class_name = "nginx"
rule {
host = "backend.io"
http {
path {
path = "/"
backend {
service_name = kubernetes_service.node.metadata.0.name
service_port = 3000
}
}
}
}
}
}
error:
╷
│ Error: Failed to create Ingress 'default/node' because: the server could not find the requested resource (post ingresses.extensions)
│
│ with kubernetes_ingress.node,
│ on node.tf line 86, in resource "kubernetes_ingress" "node":
│ 86: resource "kubernetes_ingress" "node" {
│
╵
it works:
kubectl apply -f file_below.yaml
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: node
spec:
ingressClassName: nginx
rules:
- host: backend.io
http:
paths:
- path: /
pathType: ImplementationSpecific
backend:
service:
name: node
port:
number: 3000
Need some ideas about how to deploy kubernetes ingress with terraform.

Answer 1

The issue here is that the example in YML is using the proper API version, i.e., networking.k8s.io/v1, hence it works as you probably have a version of K8s higher than 1.19. It is available since that version, the extensions/v1beta1 that Ingress was a part of was deprecated in favor of networking.k8s.io/v1 in 1.22, as you can read here. As that is the case, your current Terraform code is using the old K8s API version for Ingress. You can see that on the left-hand side of the documentation menu:
If you look further down in the documentation, you will see networking/v1 and in the resource section kubernetes_ingress_v1. Changing the code you have in Terraform to use Ingress from the networking.k8s.io/v1, it becomes:
resource "kubernetes_ingress_v1" "node" {
metadata {
name = "node"
}
spec {
ingress_class_name = "nginx"
rule {
host = "backend.io"
http {
path {
path = "/*"
path_type = "ImplementationSpecific"
backend {
service {
name = kubernetes_service.node.metadata.0.name
port {
number = 3000
}
}
}
}
}
}
}
}