make db system example self sufficient

Author: parweza

docs/examples/db_systems/datasources.tf

@@ -1,5 +1,5 @@
 # Gets a list of Availability Domains
-data "oci_identity_availability_domains" "availability_domains" {
+data "oci_identity_availability_domains" "ADs" {
   compartment_id = "${var.tenancy_ocid}"
 }
 
@@ -70,7 +70,7 @@ data "oci_database_db_versions" "test_db_versions_by_db_system_id" {
 }
 
 data "oci_database_db_system_shapes" "test_db_system_shapes" {
-  availability_domain = "${lookup(data.oci_identity_availability_domains.availability_domains.availability_domains[0],"name")}"
+  availability_domain = "${lookup(data.oci_identity_availability_domains.ADs.availability_domains[var.availability_domain - 1],"name")}"
   compartment_id      = "${var.compartment_ocid}"
 
   filter {

docs/examples/db_systems/network.tf

@@ -0,0 +1,36 @@
+resource "oci_core_virtual_network" "vcn" {
+  cidr_block     = "10.1.0.0/16"
+  compartment_id = "${var.compartment_ocid}"
+  display_name   = "TFExampleVCNDBSystem"
+  dns_label      = "tfexamplevcndbsystem"
+}
+
+resource "oci_core_subnet" "subnet" {
+  availability_domain = "${lookup(data.oci_identity_availability_domains.ADs.availability_domains[var.availability_domain - 1],"name")}"
+  cidr_block          = "10.1.20.0/24"
+  display_name        = "TFExampleSubnetDBSystem"
+  dns_label           = "tfexamplesubnetdbsystem"
+  security_list_ids   = ["${oci_core_virtual_network.vcn.default_security_list_id}"]
+  compartment_id      = "${var.compartment_ocid}"
+  vcn_id              = "${oci_core_virtual_network.vcn.id}"
+  route_table_id      = "${oci_core_route_table.route_table.id}"
+  dhcp_options_id     = "${oci_core_virtual_network.vcn.default_dhcp_options_id}"
+}
+
+resource "oci_core_internet_gateway" "internet_gateway" {
+  compartment_id = "${var.compartment_ocid}"
+  display_name   = "TFExampleIGDBSystem"
+  vcn_id         = "${oci_core_virtual_network.vcn.id}"
+}
+
+resource "oci_core_route_table" "route_table" {
+  compartment_id = "${var.compartment_ocid}"
+  vcn_id         = "${oci_core_virtual_network.vcn.id}"
+  display_name   = "TFExampleRouteTableDBSystem"
+
+  route_rules {
+    destination       = "0.0.0.0/0"
+    destination_type  = "CIDR_BLOCK"
+    network_entity_id = "${oci_core_internet_gateway.internet_gateway.id}"
+  }
+}

docs/examples/db_systems/resources.tf

@@ -1,5 +1,5 @@
 resource "oci_database_db_system" "test_db_system" {
-  availability_domain = "${lookup(data.oci_identity_availability_domains.availability_domains.availability_domains[0],"name")}"
+  availability_domain = "${lookup(data.oci_identity_availability_domains.ADs.availability_domains[var.availability_domain - 1],"name")}"
   compartment_id      = "${var.compartment_ocid}"
   cpu_core_count      = "${lookup(data.oci_database_db_system_shapes.test_db_system_shapes.db_system_shapes[0], "minimum_core_count")}"
   database_edition    = "${var.db_edition}"
@@ -24,7 +24,7 @@ resource "oci_database_db_system" "test_db_system" {
 
   disk_redundancy = "${var.db_disk_redundancy}"
   shape           = "${var.db_system_shape}"
-  subnet_id       = "${var.subnet_ocid}"
+  subnet_id       = "${oci_core_subnet.subnet.id}"
   ssh_public_keys = ["${var.ssh_public_key}"]
   display_name    = "${var.db_system_display_name}"
 

docs/examples/db_systems/variables.tf

@@ -8,16 +8,15 @@ variable "compartment_ocid" {}
 variable "ssh_public_key" {}
 variable "ssh_private_key" {}
 
-variable "subnet_ocid" {}
 
 # Choose an Availability Domain
-variable "availability_domain_index" {
-  default = "1"
+variable "availability_domain" {
+  default = "2"
 }
 
 # DBSystem specific 
 variable "db_system_shape" {
-  default = "BM.HighIO1.36"
+  default = "VM.Standard1.1"
 }
 
 variable "cpu_core_count" {
@@ -29,7 +28,7 @@ variable "db_edition" {
 }
 
 variable "db_admin_password" {
-  default = "BEstrO0ng_#11"
+  default = "BEstrO0ng_#12"
 }
 
 variable "db_name" {