override config file from helm chart with terraform - kubernetes

Question

I'm trying to deploy ArgoCD in my k8s cluser using the helm chart for ArgoCD. I deploy everything with Terraform. Now i want to change the config file from ArgoCD such that it can connect to my private repo. It works when i manually change the file using kubectl after ArgoCD is running in my cluster but when I try to use terraform, I get the message Error: configmaps "argocd-cm" already exists meaning that i cannot overrite the configmap that is created by ArgoCD. How to i change these variables?
terraform
resource "kubernetes_namespace" "argocd" {
metadata {
name = "argocd"
}
}
resource "kubernetes_secret" "argocd_registry_secret" {
metadata {
name = "argocd-repo-credentials"
namespace = "argocd"
}
data = {
username = "USERNAME"
password = "PASSWORD"
}
}
data "helm_repository" "argoproj" {
name = "argoproj"
url = "https://argoproj.github.io/argo-helm"
}
resource "helm_release" "argocd" {
name = "argocd"
chart = "argoproj/argo-cd"
version = "2.3.5"
namespace = kubernetes_namespace.argocd.metadata[0].name
timeout = 600
}
resource "kubernetes_config_map" "argocd-cm" {
depends_on = [helm_release.argocd]
metadata {
name = "argocd-cm"
namespace = "argocd"
}
data = {
config = file("${path.module}/configs/ingress/argo-configmap.yaml")
}
}

Answer 1

Instead of name use generate_name in kubernetes_config_map
generate_name - (Optional) Prefix, used by the server, to generate a unique name ONLY IF the name field has not been provided. This value will also be combined with a unique suffix.

Answer 2

You can add private repo through argocd helm chart, add this to argocd helm release resource in TF file:
set {
name = "server.config.repositories"
value = "${file("${path.module}/repositories.yml")}"
}
where repositories.yml is:
- url: ssh://abc#def.com/my-repo.git
sshPrivateKeySecret:
name: argo-cd-stash-key
key: ssh-privatekey