Terraform：创建一个云数据库实例

本文介绍如何使用Terraform创建一个云数据库实例。

1. 定义专有网络、交换机、数据库实例及相关的数据库和账号等资源，terraform.tf文件内容如下。
   说明 需要为每个Terraform项目创建一个独立的执行目录。

   resource "alicloud_vpc" "main" {
     name       = "alicloud"
     cidr_block = "10.1.0.0/21"
   }
   
   resource "alicloud_vswitch" "main" {
     vpc_id            = alicloud_vpc.main.id
     cidr_block        = "10.1.0.0/24"
     availability_zone = "cn-hangzhou-b"
     depends_on = [alicloud_vpc.main]
   }
   
   resource "alicloud_db_instance" "instance" {
     engine           = "MySQL"
     engine_version   = "5.6"
     instance_type    = "rds.mysql.t1.small"
     instance_storage = "10"
     vswitch_id       = alicloud_vswitch.main.id
   }
   
   resource "alicloud_db_account" "account" {
     instance_id = alicloud_db_instance.instance.id
     name        = "tf_account"
     password    = "!Test@123456"
   }
   
   resource "alicloud_db_database" "db" {
     instance_id = alicloud_db_instance.instance.id
     name        = "tf_database"
   }
   
   resource "alicloud_db_account_privilege" "privilege" {
     instance_id  = alicloud_db_instance.instance.id
     account_name = alicloud_db_account.account.name
     db_names     = [alicloud_db_database.db.name]
   }
   
   resource "alicloud_db_connection" "connection" {
     instance_id       = alicloud_db_instance.instance.id
     connection_prefix = "tf-example"
   }

2. 运行terraform apply开始创建资源。出现类似下面的日志，说明创建成功。

   alicloud_vpc.main: Creating...
   alicloud_vpc.main: Creation complete after 6s [id=vpc-bp1qdtiaztg1f9g5cqv3n]
   alicloud_vswitch.main: Creating...
   alicloud_vswitch.main: Creation complete after 5s [id=vsw-bp1i5dkhraoplr0pga7oy]
   alicloud_db_instance.instance: Creating...
   alicloud_db_instance.instance: Still creating... [10s elapsed]
   alicloud_db_instance.instance: Still creating... [20s elapsed]
   alicloud_db_instance.instance: Still creating... [30s elapsed]
   alicloud_db_instance.instance: Still creating... [40s elapsed]
   alicloud_db_instance.instance: Still creating... [50s elapsed]
   ...
   alicloud_db_instance.instance: Still creating... [5m0s elapsed]
   alicloud_db_instance.instance: Creation complete after 5m9s [id=rm-bp1mwp0hs49bgoizk]
   alicloud_db_connection.connection: Creating...
   alicloud_db_database.db: Creating...
   alicloud_db_account.account: Creating...
   alicloud_db_database.db: Creation complete after 0s [id=rm-bp1mwp0hs49bgoizk:tf_database]
   alicloud_db_account.account: Creation complete after 2s [id=rm-bp1mwp0hs49bgoizk:tf_account]
   alicloud_db_account_privilege.privilege: Creating...
   alicloud_db_connection.connection: Still creating... [10s elapsed]
   alicloud_db_account_privilege.privilege: Still creating... [10s elapsed]
   alicloud_db_connection.connection: Still creating... [20s elapsed]
   alicloud_db_account_privilege.privilege: Still creating... [20s elapsed]
   alicloud_db_account_privilege.privilege: Creation complete after 22s [id=rm-bp1mwp0hs49bgoizk:tf_account:ReadOnly]
   alicloud_db_connection.connection: Creation complete after 28s [id=rm-bp1mwp0hs49bgoizk:tf-example]
   
   Apply complete! Resources: 7 added, 0 changed, 0 destroyed.