locals {
  # Render container_env into `-e KEY=VALUE` docker flags. Empty map is a no-op.
  container_env_flags = join(
    " ",
    [for k, v in var.container_env : "-e ${k}=${v}"],
  )
}

data "openstack_images_image_v2" "os" {
  name        = var.image_name
  most_recent = true
}

data "openstack_networking_network_v2" "external" {
  name = var.external_network
}

resource "openstack_networking_network_v2" "private" {
  name           = "${var.app_name}-net"
  admin_state_up = true
}

resource "openstack_networking_subnet_v2" "private" {
  name            = "${var.app_name}-subnet"
  network_id      = openstack_networking_network_v2.private.id
  cidr            = var.private_cidr
  ip_version      = 4
  dns_nameservers = ["1.1.1.1", "8.8.8.8"]
}

resource "openstack_networking_router_v2" "main" {
  name                = "${var.app_name}-router"
  external_network_id = data.openstack_networking_network_v2.external.id
}

resource "openstack_networking_router_interface_v2" "private" {
  router_id = openstack_networking_router_v2.main.id
  subnet_id = openstack_networking_subnet_v2.private.id
}

resource "openstack_networking_secgroup_v2" "app" {
  name        = "${var.app_name}-sg"
  description = "Allow SSH and container HTTP traffic"
}

resource "openstack_networking_secgroup_rule_v2" "ssh" {
  direction         = "ingress"
  ethertype         = "IPv4"
  protocol          = "tcp"
  port_range_min    = 22
  port_range_max    = 22
  remote_ip_prefix  = "0.0.0.0/0"
  security_group_id = openstack_networking_secgroup_v2.app.id
}

resource "openstack_networking_secgroup_rule_v2" "app_http" {
  direction         = "ingress"
  ethertype         = "IPv4"
  protocol          = "tcp"
  port_range_min    = var.host_port
  port_range_max    = var.host_port
  remote_ip_prefix  = "0.0.0.0/0"
  security_group_id = openstack_networking_secgroup_v2.app.id
}

resource "openstack_networking_port_v2" "app" {
  name               = "${var.app_name}-port"
  network_id         = openstack_networking_network_v2.private.id
  security_group_ids = [openstack_networking_secgroup_v2.app.id]

  fixed_ip {
    subnet_id = openstack_networking_subnet_v2.private.id
  }

  depends_on = [openstack_networking_router_interface_v2.private]
}

resource "openstack_compute_instance_v2" "app" {
  name        = var.app_name
  flavor_name = var.flavor_name
  key_pair    = var.key_name

  user_data = templatefile("${path.module}/cloud-init/app.yaml", {
    container_image = var.container_image
    container_port  = var.container_port
    host_port       = var.host_port
    env_flags       = local.container_env_flags
  })

  block_device {
    uuid                  = data.openstack_images_image_v2.os.id
    source_type           = "image"
    destination_type      = "volume"
    volume_size           = 20
    boot_index            = 0
    delete_on_termination = true
  }

  network {
    port = openstack_networking_port_v2.app.id
  }
}

resource "openstack_networking_floatingip_v2" "app" {
  pool = var.external_network
}

resource "openstack_networking_floatingip_associate_v2" "app" {
  floating_ip = openstack_networking_floatingip_v2.app.address
  port_id     = openstack_networking_port_v2.app.id
}

variable "flavor_name" {
  description = "Instance size (maps from quake.yaml environments.*.resources flavor alias)"
  type        = string
  default     = "s1a.small"
}

variable "image_name" {
  description = "Operating system image"
  type        = string
  default     = "Ubuntu-24.04"
}

variable "key_name" {
  description = "SSH keypair name (must already exist in your project)"
  type        = string
}

variable "app_name" {
  description = "Display name prefix for compute and network resources"
  type        = string
  default     = "containerized-app"
}

variable "container_image" {
  description = "Container image to pull and run on first boot"
  type        = string
  default     = "nginx:alpine"
}

variable "container_env" {
  description = "Environment variables injected into the container at boot (maps from quake.yaml secrets and resolved service outputs)"
  type        = map(string)
  default     = {}
}

variable "container_port" {
  description = "Port the container listens on inside the container network namespace"
  type        = number
  default     = 80
}

variable "host_port" {
  description = "Host port published on the instance floating IP"
  type        = number
  default     = 80
}

variable "external_network" {
  description = "Shared external network for router gateway and floating IPs; defaults to PublicEphemeral (quickstart-aligned). Set PublicStatic in tfvars for a persisted floating IP."
  type        = string
  default     = "PublicEphemeral"
}

variable "private_cidr" {
  description = "CIDR for the private tenant network the instance lives in"
  type        = string
  default     = "10.10.10.0/24"
}

# Containerized App

Single compute instance with Docker, a published container port, and a floating IP. Golden-path template for `quake.yaml` manifests with `runtime: container`.


**Network class:** throwaway / quickstart-aligned — `external_network` defaults to `PublicEphemeral`; use `PublicStatic` in tfvars when you need a persisted floating IP.

## quake.yaml mapping

When a launch manifest declares `runtime: container`, the handoff POC resolves it to this template slug (`containerized-app`) under `iac/templates/`. The manifest declares intent; this template provisions the CPU VM lane.

| `quake.yaml` field | Maps to |
| --- | --- |
| `runtime: container` | Template slug `containerized-app` (see `RUNTIME_TO_TEMPLATE_SLUG` in `src/lib/launch/quake-manifest.schema.ts`) |
| `source.build: dockerfile` | Build the image in CI, push to a registry, then set `container_image` to that reference before apply |
| `source.build: buildpack` | Enum validated only in the POC; supply a built image reference via `container_image` |
| `environments.production.resources: cpu-standard` | `flavor_name = "m2a.large"` |
| `environments.preview.resources: cpu-small` | `flavor_name = "s1a.small"` |
| `environments.*.branch` | Branch-to-environment routing is control-plane logic; typical mapping below |

### Branch-to-environment mapping

| Environment | Typical branch | Flavor alias | Default flavor |
| --- | --- | --- | --- |
| `production` | `main` | `cpu-standard` | `m2a.large` |
| `preview` | any non-`main` branch (for example PR branches) | `cpu-small` | `s1a.small` |

Preview environments may also carry `ttl_hours` in the manifest; teardown is advisory in the POC and enforced by the control plane when wired.

Optional `services[]` entries (for example `type: object-storage`) resolve to separate templates such as `s3-storage-acl` and compose alongside this runtime template.

## Prerequisites

- OpenTofu >= 1.6.0 or Terraform >= 1.6.0
- Quake AI account with OpenStack credentials
- An existing SSH keypair in your project (the value of `key_name` must match that keypair)
- A container image reachable from the instance on first boot (public registry or project-accessible registry)

## Usage

1. Clone or copy this template directory
2. Copy `terraform.tfvars.example` to `terraform.tfvars` and fill in your values
3. Source your OpenStack credentials: `source openrc.sh`
4. Initialize: `tofu init`
5. Preview: `tofu plan`
6. Apply: `tofu apply`

After apply, open `container_url` from the outputs (HTTP on the floating IP and published host port).

## Variables

| Name | Type | Required | Default | Description |
| --- | --- | --- | --- | --- |
| `key_name` | string | yes | n/a | SSH keypair name (must already exist in your project) |
| `flavor_name` | string | no | `s1a.small` | Instance size |
| `image_name` | string | no | `Ubuntu-24.04` | Operating system image |
| `app_name` | string | no | `containerized-app` | Display name prefix for resources |
| `container_image` | string | no | `nginx:alpine` | Container image to pull and run |
| `container_env` | map(string) | no | `{}` | Environment variables injected into the container at boot |
| `container_port` | number | no | `80` | Port inside the container |
| `host_port` | number | no | `80` | Port published on the instance |
| `external_network` | string | no | `PublicEphemeral` | Defaults to ephemeral quickstart path; set `PublicStatic` for persisted FIP |
| `private_cidr` | string | no | `10.10.10.0/24` | CIDR for the private subnet |

## Outputs

| Name | Description |
| --- | --- |
| `floating_ip` | Public floating IP assigned to the instance |
| `private_ip` | Private IP address of the instance |
| `container_url` | `http://<floating_ip>:<host_port>` for the published container |
| `instance_id` | Compute instance ID |

## Environment variables and composition

`container_env` injects values into the container at boot. The launch handoff plan
populates it from two sources: `quake.yaml` secret names (you supply the values) and the
outputs of service templates applied earlier in the plan (for example an
`s3-storage-acl` bucket name). Apply service templates first, read their outputs, then set
`container_env` before applying this template.

For the POC, `container_env` values are passed as `docker run -e` flags and are visible in
the instance process list and cloud-init logs. For production, source secrets from a secret
store rather than the manifest.

## Documentation

Full documentation: [Containerized app template](/docs/automation/templates/containerized-app)

See also: [Deploy a containerized web application](/resources/tutorials/deploy-containerized-app)