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modules/20-services-apps/watchtower/main.tf

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+// Watchtower module for automatic Docker container updates
+// This module configures a Watchtower container that monitors and updates other containers
+
+locals {
+  container_name = var.container_name != "" ? var.container_name : "watchtower"
+  image_tag      = var.image_tag != "" ? var.image_tag : "latest"
+  
+  default_env_vars = {
+    TZ                           = var.timezone
+    WATCHTOWER_CLEANUP           = var.cleanup
+    WATCHTOWER_POLL_INTERVAL     = var.poll_interval
+    WATCHTOWER_INCLUDE_STOPPED   = var.include_stopped
+    WATCHTOWER_REVIVE_STOPPED    = var.revive_stopped
+    WATCHTOWER_ROLLING_RESTART   = var.rolling_restart
+    WATCHTOWER_NOTIFICATION_URL  = var.notification_url
+    WATCHTOWER_NOTIFICATIONS     = var.enable_notifications ? "shoutrrr" : ""
+  }
+  
+  // Merge default env vars with any additional ones provided
+  env_vars = merge(local.default_env_vars, var.additional_env_vars)
+  
+  // Default volumes for Docker socket access
+  default_volumes = [
+    {
+      host_path      = "/var/run/docker.sock"
+      container_path = "/var/run/docker.sock"
+      read_only      = true
+    }
+  ]
+  
+  // Merge default volumes with any additional ones provided
+  volumes = concat(local.default_volumes, var.additional_volumes)
+}
+
+// Use the generic docker-service module to deploy Watchtower
+module "watchtower" {
+  source = "../../10-services-generic/docker-service"
+
+  container_name  = local.container_name
+  image           = "containrrr/watchtower"
+  tag             = local.image_tag
+  
+  restart_policy  = var.restart_policy
+  network_mode    = "bridge"
+  
+  env_vars        = local.env_vars
+  volumes         = local.volumes
+  
+  labels          = var.labels
+  
+  // Watchtower doesn't typically expose ports but we'll include the option
+  ports           = var.ports
+  
+  // Add monitoring label if enabled
+  monitoring      = var.monitoring
+  
+  depends_on      = []
+}