feat: Add option to set lambda memory increase webhook memory (#3778)

- Configurable memory for lambda
- Webhook had no explicit memoery set, default is 128. Now set to 256
after running some benchmarking.


## Tested

- [x] Deefault example
- [x] Multi runner example

---------

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: npalm

Diff for: README.md

@@ -179,6 +179,7 @@ Talk to the forestkeepers in the `runners-channel` on Slack.
 | <a name="input_logging_retention_in_days"></a> [logging\_retention\_in\_days](#input\_logging\_retention\_in\_days) | Specifies the number of days you want to retain log events for the lambda log group. Possible values are: 0, 1, 3, 5, 7, 14, 30, 60, 90, 120, 150, 180, 365, 400, 545, 731, 1827, and 3653. | `number` | `180` | no |
 | <a name="input_minimum_running_time_in_minutes"></a> [minimum\_running\_time\_in\_minutes](#input\_minimum\_running\_time\_in\_minutes) | The time an ec2 action runner should be running at minimum before terminated, if not busy. | `number` | `null` | no |
 | <a name="input_pool_config"></a> [pool\_config](#input\_pool\_config) | The configuration for updating the pool. The `pool_size` to adjust to by the events triggered by the `schedule_expression`. For example you can configure a cron expression for weekdays to adjust the pool to 10 and another expression for the weekend to adjust the pool to 1. | <pre>list(object({<br>    schedule_expression = string<br>    size                = number<br>  }))</pre> | `[]` | no |
+| <a name="input_pool_lambda_memory_size"></a> [pool\_lambda\_memory\_size](#input\_pool\_lambda\_memory\_size) | Memory size limit for scale-up lambda. | `number` | `512` | no |
 | <a name="input_pool_lambda_reserved_concurrent_executions"></a> [pool\_lambda\_reserved\_concurrent\_executions](#input\_pool\_lambda\_reserved\_concurrent\_executions) | Amount of reserved concurrent executions for the scale-up lambda function. A value of 0 disables lambda from being triggered and -1 removes any concurrency limitations. | `number` | `1` | no |
 | <a name="input_pool_lambda_timeout"></a> [pool\_lambda\_timeout](#input\_pool\_lambda\_timeout) | Time out for the pool lambda in seconds. | `number` | `60` | no |
 | <a name="input_pool_runner_owner"></a> [pool\_runner\_owner](#input\_pool\_runner\_owner) | The pool will deploy runners to the GitHub org ID, set this value to the org to which you want the runners deployed. Repo level is not supported. | `string` | `null` | no |
@@ -195,6 +196,7 @@ Talk to the forestkeepers in the `runners-channel` on Slack.
 | <a name="input_runner_binaries_s3_logging_bucket_prefix"></a> [runner\_binaries\_s3\_logging\_bucket\_prefix](#input\_runner\_binaries\_s3\_logging\_bucket\_prefix) | Bucket prefix for action runner distribution bucket access logging. | `string` | `null` | no |
 | <a name="input_runner_binaries_s3_sse_configuration"></a> [runner\_binaries\_s3\_sse\_configuration](#input\_runner\_binaries\_s3\_sse\_configuration) | Map containing server-side encryption configuration for runner-binaries S3 bucket. | `any` | <pre>{<br>  "rule": {<br>    "apply_server_side_encryption_by_default": {<br>      "sse_algorithm": "AES256"<br>    }<br>  }<br>}</pre> | no |
 | <a name="input_runner_binaries_s3_versioning"></a> [runner\_binaries\_s3\_versioning](#input\_runner\_binaries\_s3\_versioning) | Status of S3 versioning for runner-binaries S3 bucket. Once set to Enabled the change cannot be reverted via Terraform! | `string` | `"Disabled"` | no |
+| <a name="input_runner_binaries_syncer_lambda_memory_size"></a> [runner\_binaries\_syncer\_lambda\_memory\_size](#input\_runner\_binaries\_syncer\_lambda\_memory\_size) | Memory size limit in MB for binary syncer lambda. | `number` | `256` | no |
 | <a name="input_runner_binaries_syncer_lambda_timeout"></a> [runner\_binaries\_syncer\_lambda\_timeout](#input\_runner\_binaries\_syncer\_lambda\_timeout) | Time out of the binaries sync lambda in seconds. | `number` | `300` | no |
 | <a name="input_runner_binaries_syncer_lambda_zip"></a> [runner\_binaries\_syncer\_lambda\_zip](#input\_runner\_binaries\_syncer\_lambda\_zip) | File location of the binaries sync lambda zip file. | `string` | `null` | no |
 | <a name="input_runner_boot_time_in_minutes"></a> [runner\_boot\_time\_in\_minutes](#input\_runner\_boot\_time\_in\_minutes) | The minimum time for an EC2 runner to boot and register as a runner. | `number` | `5` | no |
@@ -213,9 +215,11 @@ Talk to the forestkeepers in the `runners-channel` on Slack.
 | <a name="input_runners_lambda_s3_object_version"></a> [runners\_lambda\_s3\_object\_version](#input\_runners\_lambda\_s3\_object\_version) | S3 object version for runners lambda function. Useful if S3 versioning is enabled on source bucket. | `string` | `null` | no |
 | <a name="input_runners_lambda_zip"></a> [runners\_lambda\_zip](#input\_runners\_lambda\_zip) | File location of the lambda zip file for scaling runners. | `string` | `null` | no |
 | <a name="input_runners_maximum_count"></a> [runners\_maximum\_count](#input\_runners\_maximum\_count) | The maximum number of runners that will be created. | `number` | `3` | no |
+| <a name="input_runners_scale_down_lambda_memory_size"></a> [runners\_scale\_down\_lambda\_memory\_size](#input\_runners\_scale\_down\_lambda\_memory\_size) | Memory size limit in MB for scale-down lambda. | `number` | `512` | no |
 | <a name="input_runners_scale_down_lambda_timeout"></a> [runners\_scale\_down\_lambda\_timeout](#input\_runners\_scale\_down\_lambda\_timeout) | Time out for the scale down lambda in seconds. | `number` | `60` | no |
+| <a name="input_runners_scale_up_Lambda_memory_size"></a> [runners\_scale\_up\_Lambda\_memory\_size](#input\_runners\_scale\_up\_Lambda\_memory\_size) | Memory size limit in MB for scale-up lambda. | `number` | `512` | no |
 | <a name="input_runners_scale_up_lambda_timeout"></a> [runners\_scale\_up\_lambda\_timeout](#input\_runners\_scale\_up\_lambda\_timeout) | Time out for the scale up lambda in seconds. | `number` | `30` | no |
-| <a name="input_runners_ssm_housekeeper"></a> [runners\_ssm\_housekeeper](#input\_runners\_ssm\_housekeeper) | Configuration for the SSM housekeeper lambda. This lambda deletes token / JIT config from SSM.<br><br>  `schedule_expression`: is used to configure the schedule for the lambda.<br>  `enabled`: enable or disable the lambda trigger via the EventBridge.<br>  `lambda_timeout`: timeout for the lambda in seconds.<br>  `config`: configuration for the lambda function. Token path will be read by default from the module. | <pre>object({<br>    schedule_expression = optional(string, "rate(1 day)")<br>    enabled             = optional(bool, true)<br>    lambda_timeout      = optional(number, 60)<br>    config = object({<br>      tokenPath      = optional(string)<br>      minimumDaysOld = optional(number, 1)<br>      dryRun         = optional(bool, false)<br>    })<br>  })</pre> | <pre>{<br>  "config": {}<br>}</pre> | no |
+| <a name="input_runners_ssm_housekeeper"></a> [runners\_ssm\_housekeeper](#input\_runners\_ssm\_housekeeper) | Configuration for the SSM housekeeper lambda. This lambda deletes token / JIT config from SSM.<br><br>  `schedule_expression`: is used to configure the schedule for the lambda.<br>  `enabled`: enable or disable the lambda trigger via the EventBridge.<br>  `lambda_memory_size`: lambda memery size limit.<br>  `lambda_timeout`: timeout for the lambda in seconds.<br>  `config`: configuration for the lambda function. Token path will be read by default from the module. | <pre>object({<br>    schedule_expression = optional(string, "rate(1 day)")<br>    enabled             = optional(bool, true)<br>    lambda_memory_size  = optional(number, 512)<br>    lambda_timeout      = optional(number, 60)<br>    config = object({<br>      tokenPath      = optional(string)<br>      minimumDaysOld = optional(number, 1)<br>      dryRun         = optional(bool, false)<br>    })<br>  })</pre> | <pre>{<br>  "config": {}<br>}</pre> | no |
 | <a name="input_scale_down_schedule_expression"></a> [scale\_down\_schedule\_expression](#input\_scale\_down\_schedule\_expression) | Scheduler expression to check every x for scale down. | `string` | `"cron(*/5 * * * ? *)"` | no |
 | <a name="input_scale_up_reserved_concurrent_executions"></a> [scale\_up\_reserved\_concurrent\_executions](#input\_scale\_up\_reserved\_concurrent\_executions) | Amount of reserved concurrent executions for the scale-up lambda function. A value of 0 disables lambda from being triggered and -1 removes any concurrency limitations. | `number` | `1` | no |
 | <a name="input_ssm_paths"></a> [ssm\_paths](#input\_ssm\_paths) | The root path used in SSM to store configuration and secrets. | <pre>object({<br>    root       = optional(string, "github-action-runners")<br>    app        = optional(string, "app")<br>    runners    = optional(string, "runners")<br>    webhook    = optional(string, "webhook")<br>    use_prefix = optional(bool, true)<br>  })</pre> | `{}` | no |
@@ -230,6 +234,7 @@ Talk to the forestkeepers in the `runners-channel` on Slack.
 | <a name="input_userdata_template"></a> [userdata\_template](#input\_userdata\_template) | Alternative user-data template, replacing the default template. By providing your own user\_data you have to take care of installing all required software, including the action runner. Variables userdata\_pre/post\_install are ignored. | `string` | `null` | no |
 | <a name="input_vpc_id"></a> [vpc\_id](#input\_vpc\_id) | The VPC for security groups of the action runners. | `string` | n/a | yes |
 | <a name="input_webhook_lambda_apigateway_access_log_settings"></a> [webhook\_lambda\_apigateway\_access\_log\_settings](#input\_webhook\_lambda\_apigateway\_access\_log\_settings) | Access log settings for webhook API gateway. | <pre>object({<br>    destination_arn = string<br>    format          = string<br>  })</pre> | `null` | no |
+| <a name="input_webhook_lambda_memory_size"></a> [webhook\_lambda\_memory\_size](#input\_webhook\_lambda\_memory\_size) | Memory size limit in MB for webhook lambda in. | `number` | `256` | no |
 | <a name="input_webhook_lambda_s3_key"></a> [webhook\_lambda\_s3\_key](#input\_webhook\_lambda\_s3\_key) | S3 key for webhook lambda function. Required if using S3 bucket to specify lambdas. | `string` | `null` | no |
 | <a name="input_webhook_lambda_s3_object_version"></a> [webhook\_lambda\_s3\_object\_version](#input\_webhook\_lambda\_s3\_object\_version) | S3 object version for webhook lambda function. Useful if S3 versioning is enabled on source bucket. | `string` | `null` | no |
 | <a name="input_webhook_lambda_timeout"></a> [webhook\_lambda\_timeout](#input\_webhook\_lambda\_timeout) | Time out of the webhook lambda in seconds. | `number` | `10` | no |

Diff for: main.tf

@@ -155,6 +155,7 @@ module "webhook" {
   lambda_runtime                                = var.lambda_runtime
   lambda_architecture                           = var.lambda_architecture
   lambda_zip                                    = var.webhook_lambda_zip
+  lambda_memory_size                            = var.webhook_lambda_memory_size
   lambda_timeout                                = var.webhook_lambda_timeout
   tracing_config                                = var.tracing_config
   logging_retention_in_days                     = var.logging_retention_in_days
@@ -237,6 +238,8 @@ module "runners" {
   lambda_runtime                   = var.lambda_runtime
   lambda_architecture              = var.lambda_architecture
   lambda_zip                       = var.runners_lambda_zip
+  lambda_scale_up_memory_size      = var.runners_scale_up_Lambda_memory_size
+  lambda_scale_down_memory_size    = var.runners_scale_down_lambda_memory_size
   lambda_timeout_scale_up          = var.runners_scale_up_lambda_timeout
   lambda_timeout_scale_down        = var.runners_scale_down_lambda_timeout
   lambda_subnet_ids                = var.lambda_subnet_ids
@@ -278,6 +281,7 @@ module "runners" {
   log_level = var.log_level
 
   pool_config                                = var.pool_config
+  pool_lambda_memory_size                    = var.pool_lambda_memory_size
   pool_lambda_timeout                        = var.pool_lambda_timeout
   pool_runner_owner                          = var.pool_runner_owner
   pool_lambda_reserved_concurrent_executions = var.pool_lambda_reserved_concurrent_executions
@@ -306,6 +310,7 @@ module "runner_binaries" {
   lambda_runtime                  = var.lambda_runtime
   lambda_architecture             = var.lambda_architecture
   lambda_zip                      = var.runner_binaries_syncer_lambda_zip
+  lambda_memory_size              = var.runner_binaries_syncer_lambda_memory_size
   lambda_timeout                  = var.runner_binaries_syncer_lambda_timeout
   tracing_config                  = var.tracing_config
   logging_retention_in_days       = var.logging_retention_in_days

Diff for: modules/ami-housekeeper/README.md

@@ -103,6 +103,7 @@ No modules.
 | <a name="input_aws_partition"></a> [aws\_partition](#input\_aws\_partition) | (optional) partition for the base arn if not 'aws' | `string` | `"aws"` | no |
 | <a name="input_cleanup_config"></a> [cleanup\_config](#input\_cleanup\_config) | Configuration for AMI cleanup.<br><br>    `amiFilters` - Filters to use when searching for AMIs to cleanup. Default filter for images owned by the account and that are available.<br>    `dryRun` - If true, no AMIs will be deregistered. Default false.<br>    `launchTemplateNames` - Launch template names to use when searching for AMIs to cleanup. Default no launch templates.<br>    `maxItems` - The maximum numer of AMI's tha will be queried for cleanup. Default no maximum.<br>    `minimumDaysOld` - Minimum number of days old an AMI must be to be considered for cleanup. Default 30.<br>    `ssmParameterNames` - SSM parameter names to use when searching for AMIs to cleanup. This parameter should be set when using SSM to configure the AMI to use. Default no SSM parameters. | <pre>object({<br>    amiFilters = optional(list(object({<br>      Name   = string<br>      Values = list(string)<br>      })),<br>      [{<br>        Name : "state",<br>        Values : ["available"],<br>        },<br>        {<br>          Name : "image-type",<br>          Values : ["machine"],<br>      }]<br>    )<br>    dryRun              = optional(bool, false)<br>    launchTemplateNames = optional(list(string))<br>    maxItems            = optional(number)<br>    minimumDaysOld      = optional(number, 30)<br>    ssmParameterNames   = optional(list(string))<br>  })</pre> | `{}` | no |
 | <a name="input_lambda_architecture"></a> [lambda\_architecture](#input\_lambda\_architecture) | AWS Lambda architecture. Lambda functions using Graviton processors ('arm64') tend to have better price/performance than 'x86\_64' functions. | `string` | `"arm64"` | no |
+| <a name="input_lambda_memory_size"></a> [lambda\_memory\_size](#input\_lambda\_memory\_size) | Memory size linit in MB of the lambda. | `number` | `256` | no |
 | <a name="input_lambda_principals"></a> [lambda\_principals](#input\_lambda\_principals) | (Optional) add extra principals to the role created for execution of the lambda, e.g. for local testing. | <pre>list(object({<br>    type        = string<br>    identifiers = list(string)<br>  }))</pre> | `[]` | no |
 | <a name="input_lambda_runtime"></a> [lambda\_runtime](#input\_lambda\_runtime) | AWS Lambda runtime. | `string` | `"nodejs18.x"` | no |
 | <a name="input_lambda_s3_bucket"></a> [lambda\_s3\_bucket](#input\_lambda\_s3\_bucket) | S3 bucket from which to specify lambda functions. This is an alternative to providing local files directly. | `string` | `null` | no |

Diff for: modules/ami-housekeeper/main.tf

@@ -14,7 +14,7 @@ resource "aws_lambda_function" "ami_housekeeper" {
   handler           = "index.handler"
   runtime           = var.lambda_runtime
   timeout           = var.lambda_timeout
-  memory_size       = 256
+  memory_size       = var.lambda_memory_size
   architectures     = [var.lambda_architecture]
 
   environment {

Diff for: modules/ami-housekeeper/variables.tf

@@ -24,6 +24,12 @@ variable "lambda_timeout" {
   default     = 60
 }
 
+variable "lambda_memory_size" {
+  description = "Memory size linit in MB of the lambda."
+  type        = number
+  default     = 256
+}
+
 variable "role_permissions_boundary" {
   description = "Permissions boundary that will be added to the created role for the lambda."
   type        = string