使用Terraform创建只读实例_云数据库 RDS(RDS)-阿里云帮助中心

本文介绍如何使用Terraform创建只读实例。

前提条件

已创建RDS PostgreSQL实例，详情请参见创建RDS PostgreSQL实例。
实例状态为运行中，您可以通过如下两种方式查看：
- 参见查询实例详情查看参数status，如果取值为Runing则表示实例状态为运行中。
- 前往RDS管理控制台，切换到目标地域，找到指定实例后，查看实例状态。

操作步骤

在terraform.tf文件中增加resource "alicloud_db_readonly_instance" "default" {}配置项，具体配置如下：

...
resource "alicloud_db_readonly_instance" "default" {
  master_db_instance_id = alicloud_db_instance.instance.id
  zone_id               = alicloud_db_instance.instance.zone_id
  engine_version        = alicloud_db_instance.instance.engine_version
  instance_type         = "pgro.n4.2c.1m"
  instance_storage      = "50"
  instance_name         = "${alicloud_db_instance.instance.id}ro"
  vswitch_id            = alicloud_vswitch.main.id
}

运行terraform apply。

出现如下配置信息后，确认配置信息并输入yes，开始创建只读实例。

alicloud_db_instance.instance: Refreshing state... [id=pgm-****]
alicloud_db_backup_policy.instance: Refreshing state... [id=pgm-****]

Terraform used the selected providers to generate the following execution plan. Resource actions are indicated with the following symbols:
  + create

Terraform will perform the following actions:

  # alicloud_db_readonly_instance.default will be created
  + resource "alicloud_db_readonly_instance" "default" {
      + acl                   = (known after apply)
      + ca_type               = (known after apply)
      + connection_string     = (known after apply)
      + engine                = (known after apply)
      + engine_version        = "13.0"
      + force_restart         = false
      + id                    = (known after apply)
      + instance_name         = "pgm-****"
      + instance_storage      = 50
      + instance_type         = "pgro.n4.2c.1m"
      + master_db_instance_id = "pgm-****"
      + port                  = (known after apply)
      + replication_acl       = (known after apply)
      + resource_group_id     = (known after apply)
      + server_cert           = (known after apply)
      + server_key            = (known after apply)
      + ssl_enabled           = (known after apply)
      + target_minor_version  = (known after apply)
      + vswitch_id            = "vsw-****"
      + zone_id               = "cn-hangzhou-j"

      + parameters {
          + name  = (known after apply)
          + value = (known after apply)
        }
    }

Plan: 1 to add, 0 to change, 0 to destroy.

Do you want to perform these actions?
  Terraform will perform the actions described above.
  Only 'yes' will be accepted to approve.

  Enter a value:

出现类似如下日志时，表示创建成功。

alicloud_db_readonly_instance.default: Creating...
alicloud_db_readonly_instance.default: Still creating... [10s elapsed]
...
alicloud_db_readonly_instance.default: Still creating... [15m11s elapsed]
alicloud_db_readonly_instance.default: Creation complete after 15m15s [id=pgr-****]

Apply complete! Resources: 1 added, 0 changed, 0 destroyed.

查看结果。

运行terraform show查看只读实例。

...
# alicloud_db_readonly_instance.default:
resource "alicloud_db_readonly_instance" "default" {
    client_ca_enabled     = 0
    client_crl_enabled    = 0
    connection_string     = "pgr-****.pg.rds.aliyuncs.com"
    deletion_protection   = false
    engine                = "PostgreSQL"
    engine_version        = "13.0"
    force_restart         = false
    id                    = "pgr-****"
    instance_name         = "pgm-****"
    instance_storage      = 50
    instance_type         = "pgro.n4.2c.1m"
    master_db_instance_id = "pgm-****"
    port                  = "5432"
    resource_group_id     = "rg-****"
    ssl_enabled           = 0
    target_minor_version  = "rds_postgres_1300_20220830"
    vswitch_id            = "vsw-****"
    zone_id               = "cn-hangzhou-j"
}

登录RDS控制台查看只读实例。