Keep sanitized Compose sources in-repo with a confirmation-gated Ansible playbook, add repo-wide validation, tighten runbook ownership/STOP/review metadata, and archive stale research docs. Co-authored-by: Cursor <cursoragent@cursor.com>
2.4 KiB
Runbook: controlled network change
Purpose
Apply a controlled network configuration change (DNS records, firewall, LAN gateway, VLAN) with impact assessment, approval, and a rollback path.
Scope
- Applicable: PowerDNS zone records,
us4firewalld allowlist, LAN gateway/VLAN/DNS changes, WireGuard. - Not applicable: SSH access-policy changes (see
AGENTS.md§SSH access safety — mandatory lockout-risk procedure).
Ownership
- Owner: personal ops (Windy)
- Last reviewed: 2026-08-17
- Related systems: PowerDNS / us4 firewalld / LAN gateway / WireGuard
Preconditions
- A change record (Linear
vpsissue) describes the change, its reason, and rollback. - Read-only impact assessment done (current config captured, blast radius known).
Safety
- Never change DNS or network config without a change record and approval.
- Capture the current config first; never delete existing config as the first action.
- For DNS: record the current record values and TTL before editing.
- For firewall: retain an independent SSH rollback session before applying (see
ansible-operations.md§us4).
Procedure
Step 1 — Assess and capture
Action — capture the current state (e.g. dig for DNS, --check --diff for firewall, show for gateway).
Expected — a baseline of current config and an identified blast radius.
Decision — change fully specified with rollback → Step 2; missing → STOP.
Step 2 — Approve
Action — confirm approval is recorded in the issue/change record.
Decision — approved → Step 3; not approved → STOP.
Step 3 — Change
Action — apply the single change (edit the record, run the gated playbook, or change gateway config) and only that change.
Expected — the new value/state is in effect.
Verification — re-query/verify the new state and confirm dependent services still pass health.
Rollback — restore the captured prior config and re-verify.
Troubleshooting
Troubleshooting A — Change broke dependent service
- Evidence: health report / endpoint failure.
- Allowed: roll back to the captured prior config.
- Next: verify; if still broken, escalate.
Final Verification
- New state verified; dependent services healthy.
- Change and outcome recorded in the issue.