✨ Improve SCW startup scripts and doc

.gitignore

@@ -10,6 +10,8 @@ prepare-scw/.terraform*
 prepare-scw/terraform.*
 prepare-scw/stage2/*.tf
 prepare-scw/stage2/kubeconfig.*
+prepare-scw/stage2/.terraform*
+prepare-scw/stage2/terraform.*
 prepare-scw/stage2/wildcard_dns.*
 
 slides/*.yml.html

prepare-scw/README.md

@@ -7,9 +7,10 @@ To use it:
 ```bash
 scw init
 terraform init
+export TF_VAR_how_many_clusters=5
+export TF_VAR_nodes_per_cluster=2
 terraform apply
 cd stage2
+terraform init
 terraform apply
 ```
-
-Edit `variables.tf` to change the number of clusters.

prepare-scw/kapsule_cluster/providers.tf

@@ -2,7 +2,7 @@ terraform {
   required_providers {
     scaleway = {
       source  = "scaleway/scaleway"
-      version = "2.0.0"
+      version = "2.1.0"
     }
     kubernetes = {
       source  = "hashicorp/kubernetes"

prepare-scw/kapsule_cluster/variables.tf

@@ -30,7 +30,7 @@ variable "pool_size" {
 
 variable "pool_min_size" {
   type    = number
-  default = 1
+  default = 2
 }
 
 variable "pool_max_size" {

prepare-scw/main.tf

@@ -1,13 +1,21 @@
 module "kapsule_cluster" {
-  count        = var.how_many_clusters
-  source       = "./kapsule_cluster"
-  cluster_name = format("tf-%03d", count.index + 101)
+  count         = var.how_many_clusters
+  source        = "./kapsule_cluster"
+  cluster_name  = format("tf-%s-%03d", random_string.tag.result, count.index + 101)
+  pool_size     = var.nodes_per_cluster
+  pool_min_size = var.nodes_per_cluster
 }
 
 output "kubectl_config" {
   value = format("scw k8s kubeconfig install %s", split("/", module.kapsule_cluster.0.cluster_id)[1])
 }
 
+resource "random_string" "tag" {
+  length = 5
+  special = false
+  upper = false
+}
+
 resource "local_file" "stage2" {
   filename = "${path.module}/stage2/main.tf"
   content = templatefile(

prepare-scw/providers.tf

@@ -2,7 +2,7 @@ terraform {
   required_providers {
     scaleway = {
       source  = "scaleway/scaleway"
-      version = "2.0.0"
+      version = "2.1.0"
     }
   }
   required_version = ">= 0.14"

prepare-scw/purge-clusters.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+scw k8s cluster list -o json | 
+  jq -r '.[] | select(.status=="'${STATE-creating}'") | .id'  | xargs -n1 scw k8s cluster delete

prepare-scw/variables.tf

@@ -2,3 +2,8 @@ variable "how_many_clusters" {
   type    = number
   default = 2
 }
+
+variable "nodes_per_cluster" {
+  type    = number
+  default = 1
+}