Initial commit

Author: manuelgdlvh

.gitignore

@@ -0,0 +1,16 @@
+volumes
+
+.envrc
+
+node_modules
+
+.terraform
+*.tfstate
+*.tfstate.tmp
+*.tfstate.backup
+*.tfstate.*.backup
+*.tfvars
+plan.json
+
+/config/*
+!/config/.gitkeep

.terraform-version

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+1.3.6

modules/k3s/backend.tf

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+locals {
+  servers = {for server in var.servers : server.host => server}
+}

modules/k3s/locals.tf

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+resource "ssh_resource" "install_k3s" {
+  for_each = local.servers
+  host     = each.value.host
+  user     = each.value.user
+  private_key = file(each.value.private_key)
+  commands = [
+    "if ! command -v k3s &>/dev/null; then",
+    "  echo 'K3s is not installed, proceeding with installation...'",
+    "  curl -sfL ${var.k3s.download_url} | INSTALL_K3S_VERSION='${var.k3s.version}' sh -s - server --docker --write-kubeconfig-mode 644 --disable=traefik",
+    "else",
+    "  echo 'K3s is already installed.'",
+    "fi"
+  ]
+  timeout = "10m"
+}
+
+
+resource "ssh_resource" "start_k3s" {
+  for_each = local.servers
+  host     = each.value.host
+  user     = each.value.user
+  private_key = file(each.value.private_key)
+  commands = [
+    "if systemctl is-active --quiet k3s; then",
+    "  echo 'K3s is installed and running, nothing to do.'",
+    "else",
+    "  echo 'K3s is installed but not running, starting the service...'",
+    "  sudo systemctl start k3s",
+    "fi"
+  ]
+
+  timeout = "10m"
+}
+
+data "remote_file" "kubeconfig" {
+  for_each = local.servers
+  conn {
+    host = each.value.host
+    user = each.value.user
+    private_key = file(each.value.private_key)
+  }
+  path = "/etc/rancher/k3s/k3s.yaml"
+  depends_on = [
+    ssh_resource.start_k3s
+  ]
+}
+
+
+
+
+

modules/k3s/main.tf

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+output "kubeconfig" {
+  description = "KubeConfigs for all servers"
+  value       = {
+    for kubeconfig in values(data.remote_file.kubeconfig)
+    : kubeconfig.conn[0].host => replace(kubeconfig.content, "127.0.0.1", kubeconfig.conn[0].host)
+  }
+  sensitive = true
+}

modules/k3s/outputs.tf

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+provider "ssh" {
+
+}
+provider "remote" {
+
+}
+
+

modules/k3s/override.tf

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+terraform {
+  required_version = ">=1.3.0"
+
+  required_providers {
+    ssh = {
+      source  = "loafoe/ssh"
+      version = "2.3.0"
+    }
+    remote = {
+      source  = "tenstad/remote"
+      version = "0.1.1"
+    }
+  }
+
+}

modules/k3s/providers.tf

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+variable "k3s" {
+  type = object({
+    download_url = string,
+    version      = string,
+  })
+  description = "K3s instance details"
+  default = {
+    download_url = "https://get.k3s.io",
+    version      = "v1.25.5+k3s1"
+  }
+  validation {
+    condition = can(regex("^https?://[a-zA-Z0-9.-]+(?:/[a-zA-Z0-9/-]*)?$", var.k3s.download_url))
+    error_message = "The provided URL is not valid. It should start with http:// or https:// and be a valid URL format."
+  }
+
+}
+
+variable "servers" {
+  type = list(object({
+    host        = string
+    user        = string
+    private_key = string
+  }))
+  default = []
+  description = "Node IPs"
+  validation {
+    condition = alltrue([
+      for server in var.servers :
+      can(regex("^((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$", server.host))
+    ])
+    error_message = "One of the IPs provided are invalid"
+  }
+}
+