veza/infra/ansible/roles/common/defaults/main.yml
senke 65c20835c1
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feat(infra): Ansible IaC scaffolding — common + incus_host roles (Day 5 v1.0.9)
Day 5 of ROADMAP_V1.0_LAUNCH.md §Semaine 1: turn the manual
host-setup steps into an idempotent playbook so subsequent days
(W2 Postgres HA, W2 PgBouncer, W2 OTel collector, W3 Redis
Sentinel, W3 MinIO distributed, W4 HAProxy) can each land as a
self-contained role on top of this baseline.

Layout (full tree under infra/ansible/):

  ansible.cfg                  pinned defaults — inventory path,
                               ControlMaster=auto so the SSH handshake
                               is paid once per playbook run
  inventory/{lab,staging,prod}.yml
                               three environments. lab is the R720's
                               local Incus container (10.0.20.150),
                               staging is Hetzner (TODO until W2
                               provisions the box), prod is R720
                               (TODO until DNS at EX-5 lands).
  group_vars/all.yml           shared defaults — SSH whitelist,
                               fail2ban thresholds, unattended-upgrades
                               origins, node_exporter version pin.
  playbooks/site.yml           entry point. Two plays:
                                 1. common (every host)
                                 2. incus_host (incus_hosts group)
  roles/common/                idempotent baseline:
                                 ssh.yml — drop-in
                                   /etc/ssh/sshd_config.d/50-veza-
                                   hardening.conf, validates with
                                   `sshd -t` before reload, asserts
                                   ssh_allow_users non-empty before
                                   apply (refuses to lock out the
                                   operator).
                                 fail2ban.yml — sshd jail tuned to
                                   group_vars (defaults bantime=1h,
                                   findtime=10min, maxretry=5).
                                 unattended_upgrades.yml — security-
                                   only origins, Automatic-Reboot
                                   pinned to false (operator owns
                                   reboot windows for SLO-budget
                                   alignment, cf W2 day 10).
                                 node_exporter.yml — pinned to
                                   1.8.2, runs as a systemd unit
                                   on :9100. Skips download when
                                   --version already matches.
  roles/incus_host/            zabbly upstream apt repo + incus +
                               incus-client install. First-time
                               `incus admin init --preseed` only when
                               `incus list` errors (i.e. the host
                               has never been initialised) — re-runs
                               on initialised hosts are no-ops.
                               Configures incusbr0 / 10.99.0.1/24
                               with NAT + default storage pool.

Acceptance verified locally (full --check needs SSH to the lab
host which is offline-only from this box, so the user runs that
step):

  $ cd infra/ansible
  $ ansible-playbook -i inventory/lab.yml playbooks/site.yml --syntax-check
  playbook: playbooks/site.yml          ← clean
  $ ansible-playbook -i inventory/lab.yml playbooks/site.yml --list-tasks
  21 tasks across 2 plays, all tagged.  ← partial applies work

Conventions enforced from the start:
  - Every task has tags so `--tags ssh,fail2ban` partial applies
    are always possible.
  - Sub-task files (ssh.yml, fail2ban.yml, etc.) so the role
    main.yml stays a directory of concerns, not a wall of tasks.
  - Validators run before reload (sshd -t for sshd_config). The
    role refuses to apply changes that would lock the operator out.
  - Comments answer "why" — task names + module names already
    say "what".

Next role on the stack: postgres_ha (W2 day 6) — pg_auto_failover
monitor + primary + replica in 2 Incus containers.

SKIP_TESTS=1 — IaC YAML, no app code.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-04-27 18:16:38 +02:00

20 lines
531 B
YAML

# Per-role defaults — overridable per host/group. group_vars/all.yml
# carries the values shared across roles; the role-local defaults
# kick in if someone runs the role standalone.
---
ssh_port: 22
ssh_permit_root_login: "no"
ssh_password_authentication: "no"
ssh_allow_users: []
fail2ban_bantime: 3600
fail2ban_findtime: 600
fail2ban_maxretry: 5
unattended_upgrades_origins: []
unattended_upgrades_auto_reboot: false
monitoring_node_exporter_version: "1.8.2"
monitoring_node_exporter_port: 9100
veza_ops_email: ops@veza.fr