ECS:create an ecs instance

Author: xiali-cloud

quickstarts/ECS/101-use-case-create-an-ecs-instance/README.md

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+<!-- BEGIN_TF_DOCS -->
+## Providers
+
+| Name | Version |
+|------|---------|
+| <a name="provider_alicloud"></a> [alicloud](#provider\_alicloud) | n/a |
+
+## Resources
+
+| Name | Type |
+|------|-----|
+| [alicloud_security_group_rule.allow_all_tcp](https://registry.terraform.io/providers/aliyun/alicloud/latest/docs/resources/security_group_rule) | resource |
+| [alicloud_security_group.default](https://registry.terraform.io/providers/aliyun/alicloud/latest/docs/resources/security_group) | resource |
+| [alicloud_instance.instance](https://registry.terraform.io/providers/aliyun/alicloud/latest/docs/resources/instance) | resource |
+| [alicloud_vswitch.vsw](https://registry.terraform.io/providers/aliyun/alicloud/latest/docs/resources/vswitch) | resource |
+| [alicloud_vpc.vpc](https://registry.terraform.io/providers/aliyun/alicloud/latest/docs/resources/vpc) | resource |
+
+## Inputs
+
+| Name | Description | Type | Default | Required |
+|------|-------------|----|---------|:--------:|
+| n/a | n/a | n/a | n/a | n/a |
+
+The template is associated with Aliyun document: [Create an ECS instance](https://help.aliyun.com/document_detail/95829.html) 
+<!-- END_TF_DOCS -->    

quickstarts/ECS/101-use-case-create-an-ecs-instance/main.tf

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+provider "alicloud" {
+  region = "cn-beijing"
+}
+
+resource "alicloud_vpc" "vpc" {
+  vpc_name   = "tf_test_foo"
+  cidr_block = "172.16.0.0/12"
+}
+
+resource "alicloud_vswitch" "vsw" {
+  vpc_id     = alicloud_vpc.vpc.id
+  cidr_block = "172.16.0.0/21"
+  zone_id    = "cn-beijing-b"
+}
+
+resource "alicloud_security_group" "default" {
+  name   = "default"
+  vpc_id = alicloud_vpc.vpc.id
+}
+
+resource "alicloud_instance" "instance" {
+  # cn-beijing
+  availability_zone = "cn-beijing-b"
+  security_groups   = alicloud_security_group.default.*.id
+  # series III
+  instance_type              = "ecs.n2.small"
+  system_disk_category       = "cloud_efficiency"
+  image_id                   = "ubuntu_18_04_64_20G_alibase_20190624.vhd"
+  instance_name              = "test_foo"
+  vswitch_id                 = alicloud_vswitch.vsw.id
+  internet_max_bandwidth_out = 10
+}
+
+resource "alicloud_security_group_rule" "allow_all_tcp" {
+  type              = "ingress"
+  ip_protocol       = "tcp"
+  nic_type          = "intranet"
+  policy            = "accept"
+  port_range        = "1/65535"
+  priority          = 1
+  security_group_id = alicloud_security_group.default.id
+  cidr_ip           = "0.0.0.0/0"
+}