FAI.me Alternative for Web-Based Linux ISO Builds

FAI.me is best understood as an unattended installer builder for Debian-family systems. OpenFactory is the FAI.me alternative when you want a web-based Linux image builder that understands prompts, app stacks, Git repositories, and validation scenarios.

Scope: a completed image and a passed VM check do not establish deployment, fleet, rollback, security, or compliance outcomes. Those require separate implementation, evidence, and accountable approval.

What FAI.me does well

FAI.me solves a focused problem: build an installation image with selected users, SSH keys, packages, partitioning, locale, and an optional first-boot script. For unattended Debian or Ubuntu installation, that is practical and direct, and clearly popular. The FAI project announced that the 42,000th FAI.me job was submitted through the web interface (up from the 20,000-image milestone it marked earlier), so the service is both mature and actively used.

Underneath the form, FAI.me is a thin, friendly face on FAI (Fully Automatic Installation), the non-interactive framework Debian and large sites use for unattended mass deployment across labs, clusters, and cloud. FAI.me lets you skip FAI's class-based config syntax and instead pick options in a browser: an installation ISO, a live ISO, or a cloud image; Debian 12 Bookworm or Debian 13 Trixie (and Ubuntu Server, Ubuntu Desktop, or Linux Mint installers); a desktop environment; SSH keys imported from GitHub, GitLab, or Salsa; a partitioning scheme; and a custom package list. The project also documents a separate path to build custom Debian live media. Check the current public form and its destructive-disk warning before choosing an output type.

That focus is both the strength and the boundary. FAI.me is opinionated about being an installer. Its own documentation warns that “all data on the first disk will be overridden without any further confirmation,” which tells you it is built to provision bare metal or a fresh VM. Application behavior, topology, deployment, and ongoing validation remain separate work.

Where OpenFactory goes broader

• Prompt input for higher-level system requirements, instead of a fixed set of form fields.
• Git repository input for app installation and packaging: point at a repo and let the builder follow its install docs.
• Multi-node preparation prompts that can express supported lab intent without claiming the target infrastructure was deployed.
• Scenario assertions that record specific behavior when each check actually runs after boot.
• Build and test records that a separately designed fleet or compliance process can review without treating them as approval.

What 42,000 jobs tells you about the gap

A service that has produced tens of thousands of images clearly hits a real need: people want to skip hand-writing installer config and get a working ISO from a form. OpenFactory agrees with that instinct and pushes it one level higher. Instead of a fixed form whose fields cap what you can express, you describe the outcome in natural language; instead of stopping at “the installer ran,” you get records for the specific checks that actually ran. Those checks do not establish that every part of a prompt was satisfied.

FAI.me vs OpenFactory

Translating a FAI.me config into an OpenFactory prompt

FAI.me already collects structured choices, so its form is a useful source for a proposed OpenFactory recipe. The translation still requires review: defaults, package names, installer semantics, first-boot behavior, and destructive disk choices do not map safely through prose alone.

• Release and base: “Debian Bookworm” or “Ubuntu Server 24.04” stays a single phrase.
• User and SSH keys: “a non-root ops user with my SSH key” replaces the username and key-import fields.
• Package list: list the packages you want inline, then inspect how the builder resolves them against the base.
• First-boot script: describe the behavior you wanted that script to produce, rather than pasting shell.
• The new part: add “and tests that confirm X is reachable after boot,” which FAI.me has no field for.

The result is a build definition you can keep, diff, and run again. It does not imply identical bytes or behavior unless external inputs are pinned and a comparison test establishes that property.

Example OpenFactory prompt

Build a Debian Bookworm server image with SSH, Docker, nginx, UFW, and a non-root ops user. Add a Python standard-library systemd service named sample-health.service that listens on 0.0.0.0:8080 and returns {"status":"ok"} from /healthz. Configure UFW to allow ports 22, 80, and 8080. Add tests that confirm SSH listens, Docker and nginx are active, nginx returns HTTP 200 on port 80, and http://localhost:8080/healthz returns the expected JSON after boot.

When FAI.me is still the right call

FAI.me remains an excellent fit for its core job. If you need to install a clean Debian, Ubuntu, or Linux Mint system onto bare metal or a fresh VM with a known user, SSH key, partition layout, and package set (and you specifically want an installer that wipes the disk and provisions from scratch), the FAI.me form is focused and established. For mass deployment across a lab or cluster, the full FAI framework behind it is purpose-built for exactly that. There is no reason to reach for anything heavier.

Evaluate OpenFactory when the deliverable is a hosted, reviewable image build with selected post-boot checks, including a supported GitHub repository. Multi-node, fleet, and compliance requirements belong in a scoped enterprise pilot, where deployment and accountable approval are defined separately. For a wider survey of installer and image tools, see our SUSE Studio alternatives roundup.

If your mental model is “I need an unattended installer,” FAI.me is a sensible place to start. If your model is “I need this Linux image to have a reviewable recipe, artifact record, and selected VM-check results,” start in the browser at console.openfactory.tech or read more about the OpenFactory custom Linux ISO builder.