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" "unleash" {
  name        = "${var.app_name}-sg"
  description = "SSH and HTTP/HTTPS for a reverse proxy; app port 4242 restricted"
}

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.unleash.id
}

# 80 and 443 carry Unleash when it is served over a domain with automatic TLS
# through a reverse proxy (Caddy or Nginx). Recommended for production use;
# nothing blocks first boot or first login without a domain.
resource "openstack_networking_secgroup_rule_v2" "http" {
  direction         = "ingress"
  ethertype         = "IPv4"
  protocol          = "tcp"
  port_range_min    = 80
  port_range_max    = 80
  remote_ip_prefix  = "0.0.0.0/0"
  security_group_id = openstack_networking_secgroup_v2.unleash.id
}

resource "openstack_networking_secgroup_rule_v2" "https" {
  direction         = "ingress"
  ethertype         = "IPv4"
  protocol          = "tcp"
  port_range_min    = 443
  port_range_max    = 443
  remote_ip_prefix  = "0.0.0.0/0"
  security_group_id = openstack_networking_secgroup_v2.unleash.id
}

# Raw app HTTP on 4242 is restricted to app_allowed_cidr (the private network
# by default). Use it for setup over an SSH tunnel or a scoped workstation IP;
# put a reverse proxy on 443 in front for routine access.
resource "openstack_networking_secgroup_rule_v2" "app" {
  direction         = "ingress"
  ethertype         = "IPv4"
  protocol          = "tcp"
  port_range_min    = 4242
  port_range_max    = 4242
  remote_ip_prefix  = var.app_allowed_cidr
  security_group_id = openstack_networking_secgroup_v2.unleash.id
}

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

  fixed_ip {
    subnet_id = openstack_networking_subnet_v2.private.id
  }

  depends_on = [openstack_networking_router_interface_v2.private]
}

resource "openstack_blockstorage_volume_v3" "data" {
  name = "${var.app_name}-data"
  size = var.volume_size
}

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

  user_data = templatefile("${path.module}/cloud-init/unleash.yaml.tftpl", {
    app_name = var.app_name
  })

  block_device {
    uuid                  = data.openstack_images_image_v2.os.id
    source_type           = "image"
    destination_type      = "volume"
    volume_size           = 30
    boot_index            = 0
    delete_on_termination = true
  }

  network {
    port = openstack_networking_port_v2.unleash.id
  }
}

resource "openstack_compute_volume_attach_v2" "data" {
  instance_id = openstack_compute_instance_v2.unleash.id
  volume_id   = openstack_blockstorage_volume_v3.data.id
}

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

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

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

variable "flavor_name" {
  description = "Instance size. Unleash plus its bundled PostgreSQL runs comfortably on 4 vCPU and 4 GiB RAM (s1a.medium). Size up for many concurrent SDK connections or a large flag inventory."
  type        = string
  default     = "s1a.medium"
}

variable "image_name" {
  description = "Operating system image. Ubuntu 24.04 is the recommended base."
  type        = string
  default     = "Ubuntu-24.04"
}

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

variable "volume_size" {
  description = "Block volume size in GiB, mounted at /var/lib/docker so the feature-flags data (the PostgreSQL database) lives on a volume you can grow rather than on the boot disk."
  type        = number
  default     = 15
}

variable "external_network" {
  description = "Shared external network for router gateway and floating IPs; defaults to PublicStatic (persisted FIP / production pattern). Override with PublicEphemeral for ephemeral demos."
  type        = string
  default     = "PublicStatic"
}

variable "private_cidr" {
  description = "CIDR for the private tenant network the instance lives in"
  type        = string
  default     = "10.52.0.0/24"
}

variable "app_allowed_cidr" {
  description = "CIDR allowed to reach Unleash on port 4242. Defaults to the private network only, so the app is not exposed to the public internet on its raw port. Put a reverse proxy on 443 in front for HTTPS once you point a domain at the instance. To reach port 4242 directly from your workstation during setup, set this to YOUR_IP/32."
  type        = string
  default     = "10.52.0.0/24"
}

#cloud-config
package_update: true
packages:
  - ca-certificates
  - curl
write_files:
  - path: /opt/unleash/docker-compose.yml
    permissions: "0644"
    content: |
      # Unleash feature-flags platform for ${app_name}. The app listens on
      # port 4242. Unlike some of the other self-hosted ops tools in this
      # library, Unleash has no auth-callback URL that blocks first boot and
      # no encryption key to back up: both postgres and unleash start
      # automatically on first boot. No credential ships with this template:
      # the PostgreSQL password is generated on first boot. Log in with the
      # default admin credentials (admin / unleash4all) and change the
      # password immediately.
      services:
        unleash:
          image: unleashorg/unleash-server:latest
          restart: unless-stopped
          ports:
            - "4242:4242"
          env_file:
            - /opt/unleash/.env
          depends_on:
            - postgres
        postgres:
          image: postgres:16-alpine
          restart: unless-stopped
          env_file:
            - /opt/unleash/.env
          volumes:
            - unleash_pg:/var/lib/postgresql/data
      volumes:
        unleash_pg:
runcmd:
  - |
    set -e
    # The data volume attaches as /dev/sdb on this platform (not /dev/vdb).
    # Mount it at /var/lib/docker before Docker is installed so the
    # PostgreSQL data lives on the resizable volume rather than the boot disk.
    DEV=/dev/sdb
    for i in $(seq 1 30); do [ -b "$DEV" ] && break; sleep 5; done
    if ! blkid "$DEV" >/dev/null 2>&1; then mkfs.ext4 -F -L unleashdata "$DEV"; fi
    mkdir -p /var/lib/docker
    mount "$DEV" /var/lib/docker
    grep -q "$DEV" /etc/fstab || echo "$DEV /var/lib/docker ext4 defaults,nofail 0 2" >> /etc/fstab
    # Install Docker Engine plus the compose plugin from Docker's convenience
    # script.
    curl -fsSL https://get.docker.com | sh
    # Generate the bundled database password on first boot. It never leaves
    # this instance.
    PGPASS=$(openssl rand -hex 24)
    umask 077
    {
      echo "DATABASE_HOST=postgres"
      echo "DATABASE_PORT=5432"
      echo "DATABASE_NAME=unleash"
      echo "DATABASE_USERNAME=unleash"
      echo "DATABASE_PASSWORD=$PGPASS"
      echo "DATABASE_SSL=false"
      echo "POSTGRES_USER=unleash"
      echo "POSTGRES_PASSWORD=$PGPASS"
      echo "POSTGRES_DB=unleash"
      echo "PORT=4242"
      # UNLEASH_URL only affects links in outgoing emails and integrations;
      # it does not block first boot or first login. Update it to your public
      # HTTPS address once you point a domain at this instance.
      echo "UNLEASH_URL=http://localhost:4242"
    } > /opt/unleash/.env
    chmod 600 /opt/unleash/.env
    # Bring up both services. Unlike the Infisical/Plane/Appsmith pattern,
    # nothing here waits on manual configuration: Unleash is reachable right
    # after boot on port 4242.
    cd /opt/unleash
    docker compose up -d

# Unleash feature flags

Single compute instance running [Unleash](https://www.getunleash.io), a self-hosted feature-flags and experimentation platform (a self-hosted alternative to LaunchDarkly or Flagsmith) on infrastructure you control. After apply, both Unleash and its bundled PostgreSQL start automatically: log in with the default admin credentials, change the password, and create your first flag.


**Network class:** production — `external_network` defaults to `PublicStatic` for persisted floating IPs and multi-tier stacks; override with `PublicEphemeral` for ephemeral demos.

The instance provisions a private network, a floating IP, and a block volume mounted at `/var/lib/docker` so the feature-flags data lives on a resizable volume. cloud-init installs Docker Engine and brings up both containers with no manual steps required before first login.

## Where this fits

Unleash centralizes feature flags, gradual rollouts, and A/B experiment toggles for a team, with projects, environments, and strategy-based targeting, on infrastructure you own rather than on a third-party SaaS.

## The simplest ops-tools template in this library

Unlike [Infisical](/resources/iac-templates/infisical-secrets) or [Plane](/resources/iac-templates/plane-project-management), Unleash has no encryption key that must be backed up and no auth-callback URL that blocks first boot: `UNLEASH_URL` only affects links in outgoing emails and integrations. cloud-init brings up the full stack automatically, and the app ships with a default local admin login you change after first login.

## 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)

## Resource baseline

Unleash plus its bundled PostgreSQL runs on 4 vCPU and 4 GiB RAM. The default `s1a.medium` flavor leaves headroom for both containers. Size up for many concurrent SDK connections or a large flag inventory.

## 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, cloud-init installs Docker, generates the PostgreSQL password into `/opt/unleash/.env`, and starts both `postgres` and `unleash`. No credential ships with this template: the database password is generated on first boot.

## Change the default admin password

Unleash ships with a default local admin login (`admin` / `unleash4all`). Log in immediately after first boot and change the password before you invite anyone else or connect a production SDK client.

## Access and security

Unleash listens on port 4242 over plain HTTP. The security group restricts 4242 to `app_allowed_cidr`, which defaults to the private network only. For production use, point a domain's DNS A record at `floating_ip`, add a reverse proxy (Caddy or Nginx) in front for HTTPS on 443, and update `UNLEASH_URL` in `/opt/unleash/.env` to the public address. Ports 80 and 443 stay open for that reverse proxy; they carry no traffic until you add one.

## Datastores

This template bundles PostgreSQL as a container on the same instance, which suits a single-team feature-flags deployment. To run it as a separate service, point `DATABASE_HOST` and the related `DATABASE_*` variables in `/opt/unleash/.env` at a [self-managed PostgreSQL](/resources/iac-templates/self-managed-postgres) instance and remove the bundled service from the compose file.

## 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.medium` | Instance size (Unleash plus PostgreSQL runs on 4 vCPU / 4 GiB) |
| `image_name` | string | no | `Ubuntu-24.04` | Operating system image |
| `app_name` | string | no | `unleash` | Display name prefix for resources |
| `volume_size` | number | no | `15` | Block volume size in GiB, mounted at `/var/lib/docker` |
| `external_network` | string | no | `PublicStatic` | Persisted FIP / production default; override with `PublicEphemeral` for demos |
| `private_cidr` | string | no | `10.52.0.0/24` | CIDR for the private subnet |
| `app_allowed_cidr` | string | no | `10.52.0.0/24` | CIDR allowed to reach Unleash on port 4242 |

## Outputs

| Name | Description |
| --- | --- |
| `floating_ip` | Public floating IP assigned to the instance |
| `private_ip` | Private IP address of the instance |
| `app_url` | Unleash app URL on port 4242 |
| `instance_id` | Compute instance ID |

## Scope

This is a single-VM Unleash host that you operate, not a managed feature-flags cloud. It is CPU-only and runs in one region, and it bundles PostgreSQL as a container on the same host. You operate the instance, Docker, Unleash, the database, and the data volume yourself: back them up, patch them, and watch resource use as SDK connections grow. For a larger team, move PostgreSQL onto its own instance and size the app host up.

## Documentation

See also: [self-managed PostgreSQL](/resources/iac-templates/self-managed-postgres), [Infisical secrets management](/resources/iac-templates/infisical-secrets)