临时关闭高可用RDS PostgreSQL实例的主备自动切换_云数据库 RDS(RDS)-阿里云帮助中心

本文介绍如何使用Terraform临时关闭高可用RDS PostgreSQL实例的主备自动切换。

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

高可用实例默认开启主备自动切换，支持通过Terraform临时关闭主备自动切换，则参考如下配置：

在terraform.tf文件的resource "alicloud_db_instance" "instance" {}中增加ha_config和manual_ha_time配置项，具体配置如下：
```
...
resource "alicloud_db_instance" "instance" {
...
  ha_config = "Manual"
  manual_ha_time = "2022-09-30T09:00:00Z"
}
                        
```
说明
控制台显示时间为北京时间，通过terraform设置时需要配置为UTC时间，UTC时间09:00对应北京时间为17:00。

运行terraform apply。

出现如下配置信息后，确认配置信息并输入yes，开始修改RDS PostgreSQL实例配置。

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

Terraform used the selected providers to generate the following execution plan. Resource actions are indicated with the
following symbols:
  ~ update in-place

Terraform will perform the following actions:

  # alicloud_db_instance.instance will be updated in-place
  ~ resource "alicloud_db_instance" "instance" {
      ~ ha_config                  = "Auto" -> "Manual"
        id                         = "pgm-****"
      + manual_ha_time             = "2022-09-30T09:00:00Z"
        # (33 unchanged attributes hidden)

        # (1 unchanged block hidden)
    }

Plan: 0 to add, 1 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，表示配置成功。

alicloud_db_instance.instance: Modifying... [id=pgm-****]
alicloud_db_instance.instance: Still modifying... [id=pgm-****, 10s elapsed]
...
alicloud_db_instance.instance: Still modifying... [id=pgm-****, 3m0s elapsed]
alicloud_db_instance.instance: Modifications complete after 3m4s [id=pgm-****]
Apply complete! Resources: 0 added, 1 changed, 0 destroyed.

查看结果。

运行terraform show查看RDS PostgreSQL实例的主备自动切换状态。

# alicloud_db_instance.instance:
resource "alicloud_db_instance" "instance" {
    client_ca_enabled          = 0
    client_crl_enabled         = 0
    connection_string          = "pgm-****.pg.rds.aliyuncs.com"
    connection_string_prefix   = "pgm-****"
    db_instance_storage_type   = "cloud_essd"
    db_time_zone               = "Asia/Shanghai"
    deletion_protection        = false
    engine                     = "PostgreSQL"
    engine_version             = "13.0"
    force_restart              = false
    ha_config                  = "Manual"
    id                         = "pgm-****"
    instance_charge_type       = "Postpaid"
    instance_name              = "terraformtest"
    instance_storage           = 50
    instance_type              = "pg.n2.2c.2m"
    maintain_time              = "05:00Z-06:00Z"
    manual_ha_time             = "2022-09-30T09:00:00Z"
    monitoring_period          = 300
    period                     = 0
    port                       = "5432"
    private_ip_address         = "192.168.XX.XX"
    resource_group_id          = "rg-****"
    security_group_ids         = []
    security_ip_mode           = "normal"
    security_ips               = [
        "127.0.0.1",
    ]
    sql_collector_config_value = 30
    sql_collector_status       = "Disabled"
    storage_auto_scale         = "Enable"
    storage_threshold          = 30
    storage_upper_bound        = 100
    target_minor_version       = "rds_postgres_1300_20220830"
    tcp_connection_type        = "SHORT"
    vpc_id                     = "vpc-****"
    vswitch_id                 = "vsw-****"
    zone_id                    = "cn-hangzhou-h"

    pg_hba_conf {
        address     = "127.0.0.1"
        database    = "all"
        method      = "md5"
        priority_id = 1
        type        = "host"
        user        = "all"
    }
}

登录RDS控制台查看RDS PostgreSQL实例的主备自动切换状态。