fix: Wrong block device mapping (#2019)

* fix: block name should default to `dev/xvda`

* fix: Wrong default for block device mapping

Co-authored-by: Gus Fune <[email protected]>

Author: npalm

Diff for: README.md

@@ -398,7 +398,7 @@ In case the setup does not work as intended follow the trace of events:
 | <a name="input_ami_owners"></a> [ami\_owners](#input\_ami\_owners) | The list of owners used to select the AMI of action runner instances. | `list(string)` | <pre>[<br>  "amazon"<br>]</pre> | no |
 | <a name="input_aws_partition"></a> [aws\_partition](#input\_aws\_partition) | (optiona) partition in the arn namespace to use if not 'aws' | `string` | `"aws"` | no |
 | <a name="input_aws_region"></a> [aws\_region](#input\_aws\_region) | AWS region. | `string` | n/a | yes |
-| <a name="input_block_device_mappings"></a> [block\_device\_mappings](#input\_block\_device\_mappings) | The EC2 instance block device configuration. Takes the following keys: `device_name`, `delete_on_termination`, `volume_type`, `volume_size`, `encrypted`, `iops` | <pre>list(object({<br>    device_name           = string<br>    delete_on_termination = bool<br>    volume_type           = string<br>    volume_size           = number<br>    encrypted             = bool<br>    iops                  = number<br>  }))</pre> | <pre>[<br>  {<br>    "delete_on_termination": true,<br>    "device_name": "/dev/xvd",<br>    "encrypted": true,<br>    "iops": null,<br>    "volume_size": 30,<br>    "volume_type": "gp3"<br>  }<br>]</pre> | no |
+| <a name="input_block_device_mappings"></a> [block\_device\_mappings](#input\_block\_device\_mappings) | The EC2 instance block device configuration. Takes the following keys: `device_name`, `delete_on_termination`, `volume_type`, `volume_size`, `encrypted`, `iops` | <pre>list(object({<br>    device_name           = string<br>    delete_on_termination = bool<br>    volume_type           = string<br>    volume_size           = number<br>    encrypted             = bool<br>    iops                  = number<br>  }))</pre> | <pre>[<br>  {<br>    "delete_on_termination": true,<br>    "device_name": "/dev/xvda",<br>    "encrypted": true,<br>    "iops": null,<br>    "volume_size": 30,<br>    "volume_type": "gp3"<br>  }<br>]</pre> | no |
 | <a name="input_cloudwatch_config"></a> [cloudwatch\_config](#input\_cloudwatch\_config) | (optional) Replaces the module default cloudwatch log config. See https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/CloudWatch-Agent-Configuration-File-Details.html for details. | `string` | `null` | no |
 | <a name="input_create_service_linked_role_spot"></a> [create\_service\_linked\_role\_spot](#input\_create\_service\_linked\_role\_spot) | (optional) create the serviced linked role for spot instances that is required by the scale-up lambda. | `bool` | `false` | no |
 | <a name="input_delay_webhook_event"></a> [delay\_webhook\_event](#input\_delay\_webhook\_event) | The number of seconds the event accepted by the webhook is invisible on the queue before the scale up lambda will receive the event. | `number` | `30` | no |

Diff for: examples/default/main.tf

@@ -30,7 +30,15 @@ module "runners" {
     webhook_secret = random_id.random.hex
   }
 
-  block_device_mappings = []
+  # configure the block device mappings, default for Amazon Linux2
+  # block_device_mappings = [{
+  #   device_name           = "/dev/xvda"
+  #   delete_on_termination = true
+  #   volume_type           = "gp3"
+  #   volume_size           = 10
+  #   encrypted             = true
+  #   iops                  = null
+  # }]
 
   # Grab zip files via lambda_download
   webhook_lambda_zip                = "lambdas-download/webhook.zip"

Diff for: modules/runners/README.md

@@ -117,7 +117,7 @@ yarn run dist
 | <a name="input_ami_owners"></a> [ami\_owners](#input\_ami\_owners) | The list of owners used to select the AMI of action runner instances. | `list(string)` | <pre>[<br>  "amazon"<br>]</pre> | no |
 | <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_aws_region"></a> [aws\_region](#input\_aws\_region) | AWS region. | `string` | n/a | yes |
-| <a name="input_block_device_mappings"></a> [block\_device\_mappings](#input\_block\_device\_mappings) | The EC2 instance block device configuration. Takes the following keys: `device_name`, `delete_on_termination`, `volume_type`, `volume_size`, `encrypted`, `iops` | <pre>list(object({<br>    device_name           = string<br>    delete_on_termination = bool<br>    volume_type           = string<br>    volume_size           = number<br>    encrypted             = bool<br>    iops                  = number<br>  }))</pre> | <pre>[<br>  {<br>    "delete_on_termination": true,<br>    "device_name": "/dev/xvd",<br>    "encrypted": true,<br>    "iops": null,<br>    "volume_size": 30,<br>    "volume_type": "gp3"<br>  }<br>]</pre> | no |
+| <a name="input_block_device_mappings"></a> [block\_device\_mappings](#input\_block\_device\_mappings) | The EC2 instance block device configuration. Takes the following keys: `device_name`, `delete_on_termination`, `volume_type`, `volume_size`, `encrypted`, `iops` | <pre>list(object({<br>    device_name           = string<br>    delete_on_termination = bool<br>    volume_type           = string<br>    volume_size           = number<br>    encrypted             = bool<br>    iops                  = number<br>  }))</pre> | <pre>[<br>  {<br>    "delete_on_termination": true,<br>    "device_name": "/dev/xvda",<br>    "encrypted": true,<br>    "iops": null,<br>    "volume_size": 30,<br>    "volume_type": "gp3"<br>  }<br>]</pre> | no |
 | <a name="input_cloudwatch_config"></a> [cloudwatch\_config](#input\_cloudwatch\_config) | (optional) Replaces the module default cloudwatch log config. See https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/CloudWatch-Agent-Configuration-File-Details.html for details. | `string` | `null` | no |
 | <a name="input_create_service_linked_role_spot"></a> [create\_service\_linked\_role\_spot](#input\_create\_service\_linked\_role\_spot) | (optional) create the service linked role for spot instances that is required by the scale-up lambda. | `bool` | `false` | no |
 | <a name="input_disable_runner_autoupdate"></a> [disable\_runner\_autoupdate](#input\_disable\_runner\_autoupdate) | Disable the auto update of the github runner agent. Be-aware there is a grace period of 30 days, see also the [GitHub article](https://github.blog/changelog/2022-02-01-github-actions-self-hosted-runners-can-now-disable-automatic-updates/) | `bool` | `false` | no |

Diff for: modules/runners/variables.tf

@@ -56,7 +56,7 @@ variable "block_device_mappings" {
     iops                  = number
   }))
   default = [{
-    device_name           = "/dev/xvd"
+    device_name           = "/dev/xvda"
     delete_on_termination = true
     volume_type           = "gp3"
     volume_size           = 30

Diff for: variables.tf

@@ -234,7 +234,7 @@ variable "block_device_mappings" {
     iops                  = number
   }))
   default = [{
-    device_name           = "/dev/xvd"
+    device_name           = "/dev/xvda"
     delete_on_termination = true
     volume_type           = "gp3"
     volume_size           = 30