## Context
Wave 6b of the state-drift consolidation plan. `scripts/pve-nfs-exports` is
the git-managed source of truth for the Proxmox host's NFS export table
(file header documents this since the 2026-04-14 NFS outage post-mortem).
Deploying it was runbook-only — `scp` then `ssh ... exportfs -ra` — which
means a change could sit unpushed-to-PVE indefinitely, and nothing alerted
on divergence between git and host.
Wave 6b closes that loop: a Woodpecker pipeline watches
`scripts/pve-nfs-exports` on the `master` branch, diffs against the
current host file, and scp's the new content followed by `exportfs -ra`.
The same 2-shell-command runbook, now a CI step that runs on every push
and is manually triggerable.
## This change
- New pipeline `.woodpecker/pve-nfs-exports-sync.yml` — path-filtered push
trigger + manual.
- SSH credentials provisioned 2026-04-18:
- ed25519 keypair `woodpecker-pve-nfs-exports-sync`
- Public key in `root@192.168.1.127:~/.ssh/authorized_keys`
- Private key in Vault `secret/woodpecker/pve_ssh_key` (plus known_hosts
entry for deterministic host-key pinning from Vault)
- Woodpecker repo-level secret `pve_ssh_key` (id 139) bound to the infra
repo's `push`/`manual`/`cron` events
- Pipeline steps: install openssh + curl (alpine image) → stage private
key from secret → ssh-keyscan the PVE host into known_hosts → diff
current vs. proposed exports (shown in pipeline log) → scp → exportfs
-ra → Slack notify status.
## What is NOT in this change
- Drift detection (git-truth vs. host-truth) via cron: this pipeline only
fires on *push*, so a host-side edit wouldn't be caught. Could add a
daily cron that just runs the diff step and alerts if non-empty. Left
as a refinement if drift becomes an issue.
- Pulling known_hosts from Vault rather than ssh-keyscan on each run: the
keyscan is simpler and works against key rotation without needing a
Vault round-trip. Pulling from Vault is the right answer the moment we
add MITM risk, which the internal network doesn't have today.
## Reproduce locally
Edit `scripts/pve-nfs-exports`, push to master. Watch the pipeline in
Woodpecker. Verify on PVE: `ssh root@192.168.1.127 "md5sum /etc/exports"`
matches `md5sum scripts/pve-nfs-exports` in the repo.
Closes: code-dne
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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