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@adityachoudhari26 adityachoudhari26 commented May 7, 2025

Summary by CodeRabbit

  • New Features
    • Added a configurable option to set the maximum number of database connections.
    • Users can now specify a value for maximum database connections or leave it unset for default behavior.

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coderabbitai bot commented May 7, 2025

Walkthrough

A new variable, max_database_connections, is introduced at both the root and database module levels in the Terraform configuration. The database module now conditionally sets the max_connections database flag based on this variable, allowing dynamic control over the maximum number of database connections.

Changes

File(s) Change Summary
main.tf, variables.tf Added a new string variable max_database_connections and passed it to the database module in the root configuration.
modules/database/variables.tf Introduced a string variable max_database_connections with a default of an empty string in the database module.
modules/database/main.tf Updated the google_sql_database_instance resource to conditionally add a database_flags block for max_connections.

Sequence Diagram(s)

sequenceDiagram
    participant User
    participant Terraform
    participant RootModule
    participant DatabaseModule
    participant GoogleSQL

    User->>Terraform: Apply configuration
    Terraform->>RootModule: Process variables (including max_database_connections)
    RootModule->>DatabaseModule: Pass max_database_connections
    DatabaseModule->>GoogleSQL: Create/Update instance (conditionally set max_connections flag)
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Poem

In the warren of code, a new path appears,
With max connections set, we hop without fears.
A flag now awaits, if the value is shown,
Otherwise, the field is left all alone.
Hooray for the burrow, where configs can grow!
🐇✨


📜 Recent review details

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Review profile: CHILL
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📥 Commits

Reviewing files that changed from the base of the PR and between a260cb2 and 687a1ee.

📒 Files selected for processing (4)
  • main.tf (1 hunks)
  • modules/database/main.tf (1 hunks)
  • modules/database/variables.tf (1 hunks)
  • variables.tf (1 hunks)
🚧 Files skipped from review as they are similar to previous changes (4)
  • main.tf
  • modules/database/variables.tf
  • variables.tf
  • modules/database/main.tf

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Actionable comments posted: 2

🧹 Nitpick comments (1)
main.tf (1)

32-35: Document and alphabetize new module input.
The max_database_connections input was added to the database module, but it isn’t mentioned in our docs/README. Please:

  • Update your Terraform documentation to include this variable.
  • (Optional) Reorder module inputs alphabetically for readability.
📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 9d11848 and a260cb2.

📒 Files selected for processing (4)
  • main.tf (1 hunks)
  • modules/database/main.tf (1 hunks)
  • modules/database/variables.tf (1 hunks)
  • variables.tf (1 hunks)
🔇 Additional comments (1)
modules/database/main.tf (1)

32-39: Dynamic block for database_flags is correctly scoped.
The conditional addition of the max_connections flag based on var.max_database_connections is implemented correctly inside the settings block. This ensures the flag is only set when provided.

Comment on lines +23 to +27
variable "max_database_connections" {
description = "The maximum number of connections to the database"
type = string
default = ""
}
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🛠️ Refactor suggestion

Consider using a numeric type or adding validation for max_database_connections.
Right now this variable is a string with an empty default. Since it ultimately represents a numeric value for the max_connections flag, we should:

  • Change the type to number with a default of null and update the dynamic block to check for != null.
  • Or add a validation block to enforce a digits-only string (e.g. ^[0-9]+$).

This ensures users can’t pass invalid inputs and improves type safety.

 variable "max_database_connections" {
   description = "The maximum number of connections to the database"
-  type        = string
-  default     = ""
+  type        = number
+  default     = null

+  validation {
+    condition     = var.max_database_connections == null || var.max_database_connections >= 0
+    error_message = "max_database_connections must be a non-negative number or null"
+  }
 }
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
variable "max_database_connections" {
description = "The maximum number of connections to the database"
type = string
default = ""
}
variable "max_database_connections" {
description = "The maximum number of connections to the database"
type = number
default = null
validation {
condition = var.max_database_connections == null || var.max_database_connections >= 0
error_message = "max_database_connections must be a non-negative number or null"
}
}

Comment on lines +26 to +31

variable "max_database_connections" {
description = "The maximum number of connections to the database"
type = string
default = ""
}
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🛠️ Refactor suggestion

Align module variable type with root or add validation.
Just like in the root, the database module’s max_database_connections should either:

  • Be converted to a number with default = null and validation, or
  • Retain string type but include a validation clause to enforce numeric content.

Consistency prevents runtime errors when passing values across modules.

 variable "max_database_connections" {
   description = "The maximum number of connections to the database"
-  type        = string
-  default     = ""
+  type        = number
+  default     = null

+  validation {
+    condition     = var.max_database_connections == null || var.max_database_connections >= 0
+    error_message = "max_database_connections must be a non-negative number or null"
+  }
 }
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
variable "max_database_connections" {
description = "The maximum number of connections to the database"
type = string
default = ""
}
variable "max_database_connections" {
description = "The maximum number of connections to the database"
type = number
default = null
validation {
condition = var.max_database_connections == null || var.max_database_connections >= 0
error_message = "max_database_connections must be a non-negative number or null"
}
}

@adityachoudhari26 adityachoudhari26 changed the title feat: max db connections flag feat: Max db connections May 7, 2025
@adityachoudhari26 adityachoudhari26 merged commit 7905d05 into main May 7, 2025
5 of 6 checks passed
@adityachoudhari26 adityachoudhari26 deleted the max-db-connections branch May 7, 2025 20:14
adityachoudhari26 pushed a commit that referenced this pull request May 7, 2025
## [1.10.0](v1.9.0...v1.10.0) (2025-05-07)

### Features

* Max db connections ([#13](#13)) ([7905d05](7905d05))
@adityachoudhari26
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This PR is included in version 1.10.0 🎉

@adityachoudhari26 adityachoudhari26 restored the max-db-connections branch July 17, 2025 20:52
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2 participants