---
title: RDS instance log disconnections disabled
description: Datadog, the leading service for cloud-scale monitoring.
breadcrumbs: >-
  Docs > Datadog Security > Code Security > Infrastructure as Code (IaC)
  Security > IaC Security Rules > RDS instance log disconnections disabled
---

# RDS instance log disconnections disabled

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## Metadata{% #metadata %}

**Id:** `terraform-alicloud-rds-instance-log-disconnections-disabled` 

**Provider:** Alicloud

**Platform:** Terraform

**Severity:** Medium

**Category:** Observability

#### Learn More{% #learn-more %}

- [Provider Reference](https://registry.terraform.io/providers/aliyun/alicloud/latest/docs/resources/db_instance#parameters)

### Description{% #description %}

The `log_disconnections` parameter must be set to `ON` for RDS instances. The rule inspects `alicloud_db_instance` resources and their `parameters` array for an entry where `name` is `log_disconnections` and `value` is `ON`.

If the parameter exists with `value = OFF`, the policy reports an `IncorrectValue` issue. If the `parameters` array is missing or the parameter is absent, the policy reports a `MissingAttribute` issue and suggests adding or updating the entry to set `value = ON` (for example, `parameters = [{ name = "log_disconnections", value = "ON" }]`).

## Compliant Code Examples{% #compliant-code-examples %}

```terraform
resource "alicloud_db_instance" "default" {
    engine = "MySQL"
    engine_version = "5.6"
    db_instance_class = "rds.mysql.t1.small"
    db_instance_storage = "10"
    parameters = [{
        name = "innodb_large_prefix"
        value = "ON"
    },{
        name = "connect_timeout"
        value = "50"
    },{
        name = "log_disconnections"
        value = "ON"
    }]
}
```

## Non-Compliant Code Examples{% #non-compliant-code-examples %}

```terraform
resource "alicloud_db_instance" "default" {
    engine = "MySQL"
    engine_version = "5.6"
    db_instance_class = "rds.mysql.t1.small"
    db_instance_storage = "10"
    parameters = [
        {
            name = "innodb_large_prefix"
            value = "ON"
        },{
            name = "connect_timeout"
            value = "50"
        },{
            name = "log_disconnections"
            value = "OFF"
        }
    ]
}
```

```terraform
resource "alicloud_db_instance" "default" {
    engine = "MySQL"
    engine_version = "5.6"
    db_instance_class = "rds.mysql.t1.small"
    db_instance_storage = "10"
    parameters = [{
        name = "innodb_large_prefix"
        value = "ON"
    },{
        name = "connect_timeout"
        value = "50"
    }]
}
```

```terraform
resource "alicloud_db_instance" "default" {
    engine = "MySQL"
    engine_version = "5.6"
    db_instance_class = "rds.mysql.t1.small"
    db_instance_storage = "10"
}
```