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参数管理

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本文介绍如何使用Terraform修改参数以及查询参数修改日志。

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。

修改参数

说明

部分参数修改后会立即重启实例，详情请参见控制台上可修改参数页面中的是否重启列。重启实例会造成连接中断，重启前请做好业务安排，谨慎操作。

本文以修改参数authentication_timeout的取值为120为例。

  1. 在terraform.tf文件的resource "alicloud_db_instance" "instance" {}中增加parameters配置项，具体配置如下：

    ...

resource "alicloud_db_instance" "instance" {
...
parameters {
    name  = "authentication_timeout"
    value = "120"  
   }       
}

  2. 运行terraform apply。

    出现如下配置信息后，确认配置信息并输入yes，开始修改参数配置。

    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:
  ~ update in-place

Terraform will perform the following actions:

  # alicloud_db_instance.instance will be updated in-place
  ~ resource "alicloud_db_instance" "instance" {
        id                         = "pgm-****"
        # (43 unchanged attributes hidden)

      + parameters {
          + name  = "authentication_timeout"
          + value = "120"
        }

        # (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-****, 3m10s elapsed]
alicloud_db_instance.instance: Modifications complete after 3m10s [id=pgm-****]

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

  3. 查看结果。

    • 运行terraform show查看参数修改情况。

      # alicloud_db_instance.instance:
resource "alicloud_db_instance" "instance" {
    acl                        = "prefer"
    ca_type                    = "aliyun"
    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"
    replication_acl            = "prefer"
    resource_group_id          = "rg-****"
    security_group_id          = "sg-****"
    security_group_ids         = [
        "sg-bp1h9iqx6mxan5tcouwc",
    ]
    security_ip_mode           = "normal"
    security_ips               = [
        "0.0.0.0/0",
    ]
    server_cert                = <<-EOT
        -----BEGIN CERTIFICATE-----
        MIIE7jCCA****xuq/yfM4ALgBJ2
        N9xwKlPQ65q/kux0yErtwhAD
        -----END CERTIFICATE-----
    EOT
    server_key                 = <<-EOT
        -----BEGIN RSA PRIVATE KEY-----
        MIIJKQIB****4Y1K34yE+e+VAdGp
        -----END RSA PRIVATE KEY-----
    EOT
    sql_collector_config_value = 30
    sql_collector_status       = "Disabled"
    ssl_action                 = "Open"
    ssl_status                 = "0"
    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-j"

    parameters {
        name  = "authentication_timeout"
        value = "120"
    }

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

    • 登录RDS控制台查看参数修改情况。修改参数

查询参数修改日志

  1. 在terraform.tf文件中增加data "alicloud_rds_modify_parameter_logs" "querylogs"配置项，具体配置如下：

    ...
data "alicloud_rds_modify_parameter_logs" "querylogs" {
  db_instance_id    = alicloud_db_instance.instance.id
  start_time = "2022-09-29T00:00Z"
  end_time = "2022-09-29T23:59Z"
}

  2. 运行terraform apply查询实例参数修改日志。

    出现类似如下日志时，表示查询成功。

    alicloud_db_instance.instance: Refreshing state... [id=pgm-****]
data.alicloud_rds_modify_parameter_logs.querylogs: Reading...
alicloud_db_backup_policy.instance: Refreshing state... [id=pgm-****]
data.alicloud_rds_modify_parameter_logs.querylogs: Read complete after 0s [id=6335****]

No changes. Your infrastructure matches the configuration.

Terraform has compared your real infrastructure against your configuration and found no differences, so no changes are needed.

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

  3. 运行terraform show查看参数修改日志。

    # data.alicloud_rds_modify_parameter_logs.querylogs:
data "alicloud_rds_modify_parameter_logs" "querylogs" {
    db_instance_id = "pgm-****"
    end_time       = "2022-09-29T23:59Z"
    id             = "63353bb6"
    logs           = [
        {
            modify_time         = "1664423171000"
            new_parameter_value = "all"
            old_parameter_value = "ddl"
            parameter_name      = "log_statement"
            status              = "Applied"
        },
        {
            modify_time         = "1664424162000"
            new_parameter_value = "ddl"
            old_parameter_value = "all"
            parameter_name      = "log_statement"
            status              = "Applied"
        },
        {
            modify_time         = "1664432729000"
            new_parameter_value = "120"
            old_parameter_value = "60"
            parameter_name      = "authentication_timeout"
            status              = "Applied"
        },
    ]
    start_time     = "2022-09-29T00:00Z"
}
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