feat: INFRA-403 add var postgres_data for more flexibility

README.md

@@ -35,6 +35,7 @@ The module takes the following variables as input:
 - **extra_security_group_ids**: List of extra security groups to assign beyond those already assigned by the module. Defaults to `[]`
 - **postgres_image**: Docker image to launch the postgres container with
 - **postgres_params**: Additional command line parameters to pass to postgres when launching it
+- **postgres_data**: Path where to store the configuration and data files
 - **postgres_user**: User that will be used to access the database
 - **postgres_database**: Name of the database that will be accessed
 - **postgres_password**: Password that will be used to access the database. If omitted, a random password is generated
@@ -117,6 +118,7 @@ To safeguard against potential outages and loss of data, changes to the server's
 To reprovision a new instance with changes to the following parameters, the module should be explicitly deleted and re-created:
 - postgres_image
 - postgres_params
+- postgres_data
 - postgres_user
 - postgres_password
 - postgres_database

main.tf

@@ -28,6 +28,7 @@ data "template_cloudinit_config" "postgres_config" {
             {
                 image = var.postgres_image
                 params = local.postgres_params
+                data = var.postgres_data
                 user = var.postgres_user
                 password = local.postgres_password
                 database = var.postgres_database

templates/docker-compose.yml

@@ -12,7 +12,7 @@ services:
     command: ${params}
 %{ endif ~}
     environment:
-      PGDATA: /data
+      PGDATA:            "${data}"
       POSTGRES_USER:     "${user}"
       POSTGRES_PASSWORD: "${password}"
       POSTGRES_DB:       "${database}"

variable.tf

@@ -44,6 +44,12 @@ variable "postgres_params" {
   default = ""
 }
 
+variable "postgres_data" {
+  description = "Path where to store the configuration and data files"
+  type = string
+  default = "/data"
+}
+
 variable "postgres_user" {
   description = "User that will access the database"
   type = string