Add support for extraHosts option (#62)

Co-authored-by: Matt Gowie <gowie.matt@gmail.com>
Co-authored-by: actions-bot <58130806+actions-bot@users.noreply.github.com>

README.md

@@ -131,6 +131,7 @@ Available targets:
 | environment | The environment variables to pass to the container. This is a list of maps | object | `null` | no |
 | environment_files | One or more files containing the environment variables to pass to the container. This maps to the --env-file option to docker run. The file must be hosted in Amazon S3. This option is only available to tasks using the EC2 launch type. This is a list of maps | object | `null` | no |
 | essential | Determines whether all other containers in a task are stopped, if this container fails or stops for any reason. Due to how Terraform type casts booleans in json it is required to double quote this value | bool | `true` | no |
+| extra_hosts | A list of hostnames and IP address mappings to append to the /etc/hosts file on the container. This is a list of maps | object | `null` | no |
 | firelens_configuration | The FireLens configuration for the container. This is used to specify and configure a log router for container logs. For more details, see https://docs.aws.amazon.com/AmazonECS/latest/APIReference/API_FirelensConfiguration.html | object | `null` | no |
 | healthcheck | A map containing command (string), timeout, interval (duration in seconds), retries (1-10, number of times to retry before marking container unhealthy), and startPeriod (0-300, optional grace period to wait, in seconds, before failed healthchecks count toward retries) | object | `null` | no |
 | links | List of container names this container can communicate with without port mappings | list(string) | `null` | no |

docs/terraform.md

@@ -15,6 +15,7 @@
 | environment | The environment variables to pass to the container. This is a list of maps | object | `null` | no |
 | environment_files | One or more files containing the environment variables to pass to the container. This maps to the --env-file option to docker run. The file must be hosted in Amazon S3. This option is only available to tasks using the EC2 launch type. This is a list of maps | object | `null` | no |
 | essential | Determines whether all other containers in a task are stopped, if this container fails or stops for any reason. Due to how Terraform type casts booleans in json it is required to double quote this value | bool | `true` | no |
+| extra_hosts | A list of hostnames and IP address mappings to append to the /etc/hosts file on the container. This is a list of maps | object | `null` | no |
 | firelens_configuration | The FireLens configuration for the container. This is used to specify and configure a log router for container logs. For more details, see https://docs.aws.amazon.com/AmazonECS/latest/APIReference/API_FirelensConfiguration.html | object | `null` | no |
 | healthcheck | A map containing command (string), timeout, interval (duration in seconds), retries (1-10, number of times to retry before marking container unhealthy), and startPeriod (0-300, optional grace period to wait, in seconds, before failed healthchecks count toward retries) | object | `null` | no |
 | links | List of container names this container can communicate with without port mappings | list(string) | `null` | no |

examples/complete/fixtures.us-east-2.tfvars

@@ -50,3 +50,9 @@ log_configuration = {
 }
 
 privileged = false
+
+extra_hosts = [{
+  ipAddress = "127.0.0.1"
+  hostname  = "app.local"
+  },
+]

examples/complete/main.tf

@@ -15,4 +15,5 @@ module "container" {
   port_mappings                = var.port_mappings
   log_configuration            = var.log_configuration
   privileged                   = var.privileged
+  extra_hosts                  = var.extra_hosts
 }

examples/complete/variables.tf

@@ -73,3 +73,12 @@ variable "privileged" {
   type        = bool
   description = "When this variable is `true`, the container is given elevated privileges on the host container instance (similar to the root user). This parameter is not supported for Windows containers or tasks using the Fargate launch type."
 }
+
+variable "extra_hosts" {
+  type = list(object({
+    ipAddress = string
+    hostname  = string
+  }))
+  description = "A list of hostnames and IP address mappings to append to the /etc/hosts file on the container. This is a list of maps"
+  default     = null
+}

main.tf

@@ -61,6 +61,7 @@ locals {
     startTimeout           = var.start_timeout
     stopTimeout            = var.stop_timeout
     systemControls         = var.system_controls
+    extraHosts             = var.extra_hosts
   }
 
   json_map = jsonencode(local.container_definition)

variables.tf

@@ -84,6 +84,15 @@ variable "environment" {
   default     = null
 }
 
+variable "extra_hosts" {
+  type = list(object({
+    ipAddress = string
+    hostname  = string
+  }))
+  description = "A list of hostnames and IP address mappings to append to the /etc/hosts file on the container. This is a list of maps"
+  default     = null
+}
+
 # https://docs.aws.amazon.com/AmazonECS/latest/APIReference/API_EnvironmentFile.html
 variable "environment_files" {
   type = list(object({