Add zfs_pool_mode: file|single|mirror.
- file (default): loopback disk image at zfs_pool_file_path — real ZFS with
no spare disk, ideal for a cost-optimized test VM; wipes nothing.
- single/mirror: whole spare disk(s); mirror for production redundancy.
Guard/probe now loops over zfs_pool_disks. Update group_vars, README (modes,
prerequisites, safety), and CLAUDE.md current-focus note.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Idempotent host configuration targeting Ubuntu 24.04 with ZFS on a
dedicated second disk. Role-based platform-infra/ansible:
- base: apt packages, timezone, unattended security upgrades.
- zfs: install ZFS, create pool on a dedicated disk (guarded against
wiping a non-empty disk), create platform datasets + customers parent
per docs/03; docker dataset mounted at /var/lib/docker.
- docker: Docker Engine + Compose plugin, daemon.json written before first
start so the native zfs storage driver initializes on the ZFS data-root;
per-site network address pool preconfigured.
- firewall: nftables inbound default-deny in a dedicated table that never
flushes Docker's rules; container outbound SMTP blocked via a DOCKER-USER
jump applied by a systemd oneshot.
- ssh_hardening: key-first SSH with an anti-lockout assertion, config
validation gate, and the sftponly group for Phase 4 SFTP accounts.
Includes ansible.cfg, requirements.yml, inventory example, group_vars with
safety notes, and a run guide. Real inventory (hosts.yml) is git-ignored.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
