Files
railiance-infra/docs/convergence.md
tegwick b32dfd4f5a docs: add verification guide, close WP-0002
- docs/verification.md: explains spec/server-baseline.yaml, goss/baseline.yaml,
  make verify workflow, assertion mapping table, and how to add new checks
- docs/convergence.md: replace manual spot-check snippet with make verify reference
- workplans/RAIL-HO-WP-0002: mark completed (all tasks done, workstream closed)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-03-09 19:37:10 +01:00

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# 🔧 Server Convergence
After provisioning servers with Terraform, RailianceHosts uses **Ansible** to bring them into a secure and usable baseline state.
This process is called **convergence**.
## What Convergence Does
When you run `make converge`, Ansible connects to all declared hosts and applies baseline roles:
- **User setup** → ensures the `admin` user exists with your SSH key and passwordless sudo
- **Firewall** → configures `ufw` with sensible defaults (deny incoming, allow SSH)
- **Hardening** → basic SSH daemon hardening, disable root login, disable password auth
- **Tooling** → installs essential packages (htop, vim, git, curl, fail2ban, etc.)
- **SOPS agent** → ensures decryption tooling (`age`, `sops`) is available on the host
## Running Convergence
```bash
make converge
```
This will:
1. Decrypt secrets locally (with your age key)
2. Run the Ansible playbooks against all hosts in your `inventory/servers.yaml`
3. Apply the baseline security and tooling configuration
## Verifying
After convergence, run the automated test suite to assert the node matches the
baseline spec:
```bash
make verify
```
This runs Goss assertions against all hosts and exits non-zero on failure.
TAP reports are written to `reports/`. See `docs/verification.md` for details.
For a quick human-readable summary without assertions:
```bash
make status
```
## Notes
- Convergence is **idempotent**: re-running it will not break your server.
- Only your workstation (control node) needs the age private key; hosts never see it.
- Additional roles (e.g. WireGuard, Kubernetes, apps) can be layered later.