unleash-proxy-fips

packaged by Chainguard

Chainguard Container for unleash-proxy-fips

Stateless HTTP proxy that evaluates Unleash feature flags for client-side SDKs

Chainguard Containers are regularly-updated, secure-by-default container images.

Download this Container Image

For those with access, this container image is available on cgr.dev:

docker pull cgr.dev/ORGANIZATION/unleash-proxy-fips:latest

Be sure to replace the ORGANIZATION placeholder with the name used for your organization's private repository within the Chainguard Registry.

Compatibility Notes

The Chainguard unleash-proxy-fips image is a minimal, drop-in replacement for the upstream unleashorg/unleash-proxy container image and is compatible with the official Unleash Proxy Helm chart. The proxy listens on port 3000 and runs as the non-root node user (UID 1000). Switching to this image should not require any changes to your existing deployment configuration.

Note: Upstream Unleash Proxy is deprecated and in security-fixes-only maintenance with an end-of-life date of November 2026. New deployments are encouraged to migrate to Unleash Edge.

FIPS Support

This Chainguard Container ships with a validated redistribution of OpenSSL's FIPS provider module, and the bundled Node.js runtime runs with FIPS mode enforced. For more on FIPS support in Chainguard Images, consult the guide on FIPS-enabled Chainguard Containers on Chainguard Academy.

Getting Started

The proxy is configured entirely through environment variables. At a minimum it needs the URL of your Unleash server, a server-side API token, and one or more client keys that downstream SDKs present to the proxy:

docker run -d -p 3000:3000 \
  -e UNLEASH_URL=https://app.unleash-hosted.com/demo/api/ \
  -e UNLEASH_API_TOKEN=<your-server-api-token> \
  -e UNLEASH_PROXY_CLIENT_KEYS=<your-proxy-client-key> \
  cgr.dev/ORGANIZATION/unleash-proxy-fips:latest

Be sure to replace the ORGANIZATION placeholder with the name used for your organization's private repository within the Chainguard Registry.

Once it has synced from the backend, the proxy reports healthy and serves toggle evaluations to clients that present a configured client key:

curl http://localhost:3000/proxy/health
curl -H "Authorization: <your-proxy-client-key>" http://localhost:3000/proxy

To deploy on Kubernetes, install the official chart with the image and connection settings overridden in a values.yaml file:

image:
  repository: cgr.dev/ORGANIZATION/unleash-proxy-fips
  tag: latest
proxy:
  serverHost: https://app.unleash-hosted.com/demo/api/
  apiToken: <your-server-api-token>
  clientKeys:
    - <your-proxy-client-key>

helm repo add unleash https://unleash.github.io/helm-charts
helm repo update
helm install my-unleash-proxy unleash/unleash-proxy -f values.yaml

Self-hosting the full stack

The proxy, the Unleash server it syncs from, and the PostgreSQL database that backs the server are all available as Chainguard Containers. The following Docker Compose example wires them together:

services:
  db:
    image: cgr.dev/ORGANIZATION/postgres:latest
    environment:
      POSTGRES_USER: unleash
      POSTGRES_PASSWORD: unleash
      POSTGRES_DB: unleash

  unleash-server:
    image: cgr.dev/ORGANIZATION/unleash-server:latest
    depends_on:
      - db
    environment:
      DATABASE_URL: postgres://unleash:unleash@db:5432/unleash
      DATABASE_SSL: "false"
      INIT_BACKEND_API_TOKENS: default:development.unleash-insecure-api-token
    ports:
      - "4242:4242"

  unleash-proxy:
    image: cgr.dev/ORGANIZATION/unleash-proxy-fips:latest
    depends_on:
      - unleash-server
    environment:
      UNLEASH_URL: http://unleash-server:4242/api
      UNLEASH_API_TOKEN: default:development.unleash-insecure-api-token
      UNLEASH_PROXY_CLIENT_KEYS: <your-proxy-client-key>
    ports:
      - "3000:3000"

Be sure to replace the ORGANIZATION placeholder with the name used for your organization's private repository within the Chainguard Registry. The seeded API token is for local evaluation only; issue a real server-side token for any non-throwaway deployment.

Documentation and Resources

• Unleash Proxy Documentation
• GitHub: Unleash/unleash-proxy
• Unleash Edge (recommended successor)

What are Chainguard Containers?

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• Minimal design, without unnecessary software bloat
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Need additional packages?

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To use Custom Assembly in the Chainguard Console: navigate to the image you'd like to customize in your Organization's list of images, and click on the Customize image button at the top of the page.

Learn More

Refer to our Chainguard Containers documentation on Chainguard Academy. Chainguard also offers VMs and Libraries — contact us for access.

Trademarks

This software listing is packaged by Chainguard. The trademarks set forth in this offering are owned by their respective companies, and use of them does not imply any affiliation, sponsorship, or endorsement by such companies.