feat: If host_flavor is set to multitenant, this will place the database on a logically separated, multi-tenant machine with minimum resource configurations required for multitenant config. (#405)

Author: Ak-sky

examples/basic/main.tf

@@ -23,6 +23,7 @@ module "postgresql_db" {
   resource_tags      = var.resource_tags
   access_tags        = var.access_tags
   member_host_flavor = var.member_host_flavor
+  member_memory_mb   = var.member_memory_mb
 }
 
 # On destroy, we are seeing that even though the replica has been returned as

examples/basic/variables.tf

@@ -56,3 +56,9 @@ variable "member_host_flavor" {
   description = "Allocated host flavor per member. For more information, see https://registry.terraform.io/providers/IBM-Cloud/ibm/latest/docs/resources/database#host_flavor"
   default     = null
 }
+
+variable "member_memory_mb" {
+  type        = number
+  description = "Allocated memory per-member. See the following doc for supported values: https://cloud.ibm.com/docs/databases-for-postgresql?topic=databases-for-postgresql-resources-scaling"
+  default     = 1024
+}

main.tf

@@ -84,9 +84,9 @@ resource "ibm_database" "postgresql_db" {
 
   ## This for_each block is NOT a loop to attach to multiple group blocks.
   ## This is used to conditionally add one, OR, the other group block depending on var.local.host_flavor_set
-  ## This block is for if host_flavor IS set
+  ## This block is for if host_flavor IS set to specific pre-defined host sizes and not set to "multitenant"
   dynamic "group" {
-    for_each = local.host_flavor_set ? [1] : []
+    for_each = local.host_flavor_set && var.member_host_flavor != "multitenant" ? [1] : []
     content {
       group_id = "member" # Only member type is allowed for postgresql
       host_flavor {
@@ -104,6 +104,32 @@ resource "ibm_database" "postgresql_db" {
     }
   }
 
+  ## This block is for if host_flavor IS set to "multitenant"
+  dynamic "group" {
+    for_each = local.host_flavor_set && var.member_host_flavor == "multitenant" ? [1] : []
+    content {
+      group_id = "member" # Only member type is allowed for postgresql
+      host_flavor {
+        id = var.member_host_flavor
+      }
+      disk {
+        allocation_mb = var.member_disk_mb
+      }
+      memory {
+        allocation_mb = var.member_memory_mb
+      }
+      cpu {
+        allocation_count = var.member_cpu_count
+      }
+      dynamic "members" {
+        for_each = var.remote_leader_crn == null ? [1] : []
+        content {
+          allocation_count = var.members
+        }
+      }
+    }
+  }
+
   ## This block is for if host_flavor IS NOT set
   dynamic "group" {
     for_each = local.host_flavor_set ? [] : [1]

tests/other_test.go

@@ -116,3 +116,24 @@ func TestRunCompleteExample(t *testing.T) {
 	assert.Nil(t, err, "This should not have errored")
 	assert.NotNil(t, output, "Expected some output")
 }
+
+func TestRunBasicExampleWithFlavorMultitenant(t *testing.T) {
+	t.Parallel()
+
+	options := testhelper.TestOptionsDefaultWithVars(&testhelper.TestOptions{
+		Testing:            t,
+		TerraformDir:       "examples/basic",
+		Prefix:             "pg-flvr-multitenant",
+		BestRegionYAMLPath: regionSelectionPath,
+		ResourceGroup:      resourceGroup,
+		TerraformVars: map[string]interface{}{
+			"member_host_flavor": "multitenant",
+			"member_memory_mb":   8192, // Requires a minimum of 8192 megabytes with multitenant flavor
+		},
+		CloudInfoService: sharedInfoSvc,
+	})
+
+	output, err := options.RunTestConsistency()
+	assert.Nil(t, err, "This should not have errored")
+	assert.NotNil(t, output, "Expected some output")
+}