how to use terraform output to deploy image inside kubernetes cluster in modular approch? - kubernetes

Question

well, I'm new in terraforming and also in Kubernetes, I faced an issue in deploying images after creating a Kubernetes cluster.
I have created a module that creates a Kubernetes cluster and provides output for the Kube config data.
now I'm using the code below but i need to run terraform apply 2 times because first time the local file is not created and terraform could not connect to kubernetes or helm or kubectl but if i run the command twice it works as expected.
any solution?
Note: i also applied the solution as on the comment section of the
code and that comment did now work either.
File : main.tf
module "deploy_lke" {
source = "./modules/linode/kubernetes"
token = var.token
k8s_version = var.k8s_version
label = var.label
region = var.region
tags = var.tags
instance_type = var.instance_type
number_of_instance = var.number_of_instance
min = var.min
max = var.max
}
module "deploy_image" {
source = "./modules/kubernetes"
kube_config_path = module.deploy_lke.kubeconfig
dockerconfigjson = file("./secret/docker-sec.json")
deploy_name = var.deploy_name
desire_replicas = var.desire_replicas
image_link = var.image_link
image_name = var.image_name
image_port = var.image_port
ip_type = var.ip_type
max_replicas_val = var.max_replicas_val
min_replicas_val = var.min_replicas_val
service_name = var.service_name
}
File : ./module/linode/kubernetes
terraform {
required_providers {
linode = {
source = "linode/linode"
version = "1.29.4"
}
kubernetes = {
source = "hashicorp/kubernetes"
version = ">= 2.0.0"
}
}
}
provider "linode" {
token = var.token
}
resource "linode_lke_cluster" "gaintplay-web-lke" {
k8s_version = var.k8s_version
label = var.label
region = var.region
tags = var.tags
pool {
type = var.instance_type
count = var.number_of_instance
autoscaler {
min = var.min
max = var.max
}
}
lifecycle {
ignore_changes = [
pool.0.count
]
}
}
output "kubeconfig" {
value = linode_lke_cluster.gaintplay-web-lke.kubeconfig
}
output "api_endpoints" {
value = linode_lke_cluster.gaintplay-web-lke.api_endpoints
}
File : ./module/kubernetes
terraform {
required_providers {
kubernetes = {
source = "hashicorp/kubernetes"
version = ">= 2.0.0"
}
}
}
resource "local_file" "kube_config_file" {
content = var.kube_config_path
filename = "${path.module}/config"
}
provider "kubernetes" {
config_path = var.kube_config_path
}
provider "helm" {
kubernetes {
config_path = var.kube_config_path
}
}
resource "kubernetes_secret" "docker_secret" {
metadata {
name = "docker-cfg"
}
data = {
".dockerconfigjson" = var.dockerconfigjson
}
type = "kubernetes.io/dockerconfigjson"
}
resource "kubernetes_deployment" "beta" {
depends_on = [
kubernetes_secret.docker_secret
]
metadata {
name = var.deploy_name
namespace = "default"
}
spec {
replicas = var.desire_replicas
selector {
match_labels = {
app = var.deploy_name
}
}
template {
metadata {
labels = {
app = var.deploy_name
}
}
spec {
image_pull_secrets {
name = kubernetes_secret.docker_secret.metadata[0].name
}
container {
image_pull_policy = "Always"
image = var.image_link
name = var.image_name
port {
container_port = var.image_port
}
}
}
}
}
}
# provider "kubernetes" {
# host = "${yamldecode(var.kube_config_path).clusters.0.cluster.server}"
# client_certificate = "${base64decode(yamldecode(var.kube_config_path).users.0.user.client-certificate-data)}"
# client_key = "${base64decode(yamldecode(var.kube_config_path).users.0.user.client-key-data)}"
# cluster_ca_certificate = "${base64decode(yamldecode(var.kube_config_path).clusters.0.cluster.certificate-authority-data)}"
# }
# provider "helm" {
# kubernetes {
# host = "${yamldecode(var.kube_config_path).clusters.0.cluster.server}"
# client_certificate = "${base64decode(yamldecode(var.kube_config_path).users.0.user.client-certificate-data)}"
# client_key = "${base64decode(yamldecode(var.kube_config_path).users.0.user.client-key-data)}"
# cluster_ca_certificate = "${base64decode(yamldecode(var.kube_config_path).clusters.0.cluster.certificate-authority-data)}"
# }
# }
If i use the command as it is i got this error in terraform plan that the file is not found and i need to run it twice.
Invalid attribute in provider configuration
with module.deploy_image.provider["registry.terraform.io/hashicorp/kubernetes"],
on modules/kubernetes/main.tf line 13, in provider "kubernetes":
13: provider "kubernetes" {
'config_path' refers to an invalid path: "modules/kubernetes/config": stat modules/kubernetes/config: no such file or directory
and
If I use commented code i get error like this:
│ Error: Unsupported attribute
│
│ on main.tf line 35, in provider "kubernetes":
│ 35: host = "${yamldecode(linode_lke_cluster.gaintplay-web-lke.kubeconfig).clusters.0.cluster.server}"
│
│ Can't access attributes on a primitive-typed value (string).
╵
╷
│ Error: Unsupported attribute
│
│ on main.tf line 36, in provider "kubernetes":
│ 36: client_certificate = "${base64decode(yamldecode(linode_lke_cluster.gaintplay-web-lke.kubeconfig).users.0.user.client-certificate-data)}"
│
│ Can't access attributes on a primitive-typed value (string).