Add install_cmd for other package managers in init-snippet-install-awscli

CHANGELOG.md

@@ -7,6 +7,9 @@
 * nat-gateways: Fix association issue caused between `nat_eip` and
   public subnets. This only affects resources using the `nat_eip` variable.
 
+* `init-snippet-install-awscli`: new argument to allow not only `apt` as a
+  command to install OS packages
+
 ### Examples
 
 # v0.9.16

modules/init-snippet-install-awscli/README.md

@@ -2,7 +2,8 @@
 
 Generate an init snippet to install the AWS cli tool on boot. This will:
 
-* use apt to install `python-pip`
+* use apt (by default) to install `python-pip`
 * use `pip` to upgrade `pip`
 * us `pip` to install `awscli`
 
+To override package manager set a proper value to the argument `install_cmd`.

modules/init-snippet-install-awscli/main.tf

@@ -3,7 +3,7 @@
  *
  * Generate an init snippet to install the AWS cli tool on boot. This will:
  *
- * * use apt to install `python-pip`
+ * * use apt/yum to install `python-pip`
  * * use `pip` to upgrade `pip`
  * * us `pip` to install `awscli`
  *
@@ -16,6 +16,12 @@ variable "init_prefix" {
   type = string
 }
 
+variable "install_cmd" {
+  default     = "apt install -y"
+  description = "package manager install command (`apt install -y` by default)"
+  type        = string
+}
+
 variable "init_suffix" {
   default     = ""
   description = "init (shellcode) to append to the end of this snippet"
@@ -34,6 +40,7 @@ data "template_file" "init_snippet" {
 
   vars = {
     init_prefix = var.init_prefix
+    install_cmd = var.install_cmd
     init_suffix = var.init_suffix
     log_prefix  = var.log_prefix
   }

modules/init-snippet-install-awscli/snippet.tpl

@@ -1,5 +1,5 @@
 # start snippet - install awscli python cli tools
 ${init_prefix}
-apt install -y python3-pip
+${install_cmd} python3-pip
 pip3 install awscli
 ${init_suffix}