Add ability to change local exec interpreter from variable. (cloudpos…

…se#29)

* Add ability to change local exec interpreter

* Update README.md and terraform.md

README.md

@@ -258,6 +258,7 @@ Available targets:
 | endpoint_public_access | Indicates whether or not the Amazon EKS public API server endpoint is enabled. Default to AWS EKS resource and it is true | bool | `true` | no |
 | kubeconfig_path | The path to `kubeconfig` file | string | `~/.kube/config` | no |
 | kubernetes_version | Desired Kubernetes master version. If you do not specify a value, the latest available version is used | string | `1.14` | no |
+| local_exec_interpreter | shell to use for local exec | string | `/bin/sh` | no |
 | map_additional_aws_accounts | Additional AWS account numbers to add to `config-map-aws-auth` ConfigMap | list(string) | `<list>` | no |
 | map_additional_iam_roles | Additional IAM roles to add to `config-map-aws-auth` ConfigMap | object | `<list>` | no |
 | map_additional_iam_users | Additional IAM users to add to `config-map-aws-auth` ConfigMap | object | `<list>` | no |

auth.tf

@@ -82,7 +82,8 @@ resource "null_resource" "apply_configmap_auth" {
   depends_on = [aws_eks_cluster.default, local_file.configmap_auth]
 
   provisioner "local-exec" {
-    command = <<EOT
+    interpreter = [var.local_exec_interpreter, "-c"]
+    command     = <<EOT
       while [[ ! -e ${local.configmap_auth_file} ]] ; do sleep 1; done && \
       aws eks update-kubeconfig --name=${local.cluster_name} --region=${var.region} --kubeconfig=${var.kubeconfig_path} && \
       kubectl apply -f ${local.configmap_auth_file} --kubeconfig ${var.kubeconfig_path}

docs/terraform.md

@@ -14,6 +14,7 @@
 | endpoint_public_access | Indicates whether or not the Amazon EKS public API server endpoint is enabled. Default to AWS EKS resource and it is true | bool | `true` | no |
 | kubeconfig_path | The path to `kubeconfig` file | string | `~/.kube/config` | no |
 | kubernetes_version | Desired Kubernetes master version. If you do not specify a value, the latest available version is used | string | `1.14` | no |
+| local_exec_interpreter | shell to use for local exec | string | `/bin/sh` | no |
 | map_additional_aws_accounts | Additional AWS account numbers to add to `config-map-aws-auth` ConfigMap | list(string) | `<list>` | no |
 | map_additional_iam_roles | Additional IAM roles to add to `config-map-aws-auth` ConfigMap | object | `<list>` | no |
 | map_additional_iam_users | Additional IAM users to add to `config-map-aws-auth` ConfigMap | object | `<list>` | no |

variables.tf

@@ -147,3 +147,9 @@ variable "kubeconfig_path" {
   default     = "~/.kube/config"
   description = "The path to `kubeconfig` file"
 }
+
+variable "local_exec_interpreter" {
+  type        = string
+  default     = "/bin/sh"
+  description = "shell to use for local exec"
+}