This module manages a cloud-config configuration that starts a containerized Envoy Proxy on Container Optimized OS connected to Traffic Director. The default configuration creates a reverse proxy exposed on the node's port 80. Traffic routing policies and management should be managed by other means via Traffic Director.

The generated cloud config is rendered in the cloud_config output, and is meant to be used in instances or instance templates via the user-data metadata.

This module depends on the cos-generic-metadata module being in the parent folder. If you change its location be sure to adjust the source attribute in main.tf.

Examples

Default configuration

# Envoy TD config
module "cos-envoy-td" {
  source = "./fabric/modules/cloud-config-container/envoy-traffic-director"
}

# COS VM
module "vm-cos" {
  source     = "./fabric/modules/compute-vm"
  project_id = local.project_id
  zone       = local.zone
  name       = "cos-envoy-td"
  network_interfaces = [{
    network    = local.vpc.self_link,
    subnetwork = local.vpc.subnet_self_link,
    nat        = false,
    addresses  = null
  }]
  tags           = ["ssh", "http"]

  metadata = {
    user-data = module.cos-envoy-td.cloud_config
  }

  boot_disk = {
    image = "projects/cos-cloud/global/images/family/cos-stable"
    type  = "pd-ssd"
    size  = 10
  }

  service_account_scopes = ["https://www.googleapis.com/auth/cloud-platform"]
}

Variables

name	description	type	required	default
docker_logging	Log via the Docker gcplogs driver. Disable if you use the legacy Logging Agent instead.	`bool`		`true`
envoy_image	Envoy Proxy container image to use.	`string`		`"envoyproxy/envoy:v1.15.5"`

Outputs

name	description	sensitive
cloud_config	Rendered cloud-config file to be passed as user-data instance metadata.