Master overview (PHASE4_1_PREPRODUCTION_HARDENING.md) covering all 27
substantive items, plus REMOTE_AND_SELF_PACED_ARCHITECTURE.md (reviews
what already works for remote/self-paced delivery - student-driven
provisioning, cohort-less students, idle-reaper-destroy-then-continue -
and the one real gap: student authentication, explicitly Phase 5 scope,
not built here).
Updated PRODUCTION_NETWORK_SECURITY.md (the Gateway-to-Lab gap is now
RESOLVED, with the full design writeup and a new control-plane-vs-data-plane
section), PRODUCTION_DEPLOYMENT.md (four-cert TLS bundle),
PRODUCTION_VALIDATION_CHECKLIST.md (Router mTLS check, admission control
checks), PHASE4_PRODUCTION_INFRASTRUCTURE.md and ENGINEERING_SOP.md and
LAB_ARCHITECTURE.md (stale 'known gap' pointers updated to point at the
resolution), BACKUP_DR.md (destructive drill), README.md and
platform/README.md (Phase 4.1 pointers, lab-router component, updated
known-limitations).
Also fixes a real pre-existing bug found while auditing what gets
committed: infra/.gitignore's patterns were written repo-root-relative
(e.g. "infra/terraform/...") but the file lives in infra/, so git resolved
them relative to THAT directory and none of them ever matched anything -
a real .terraform/ provider cache showed up as untracked when it should
have been ignored. Fixed by dropping the redundant leading "infra/" from
every pattern.
Status: PHASE 4.1 COMPLETE / PRE-PRODUCTION HARDENING COMPLETE / READY FOR
HARDWARE DEPLOYMENT.
Master overview (PHASE4_PRODUCTION_INFRASTRUCTURE.md) plus five detail docs
(PRODUCTION_DEPLOYMENT, PRODUCTION_NETWORK_SECURITY, BACKUP_DR,
OBSERVABILITY, CAPACITY_PLANNING), a master PRODUCTION_VALIDATION_CHECKLIST,
and 12 runbooks (first deployment, normal deploy, rollback, Postgres
restore, VM rebuild for both hosts, Docker TLS rotation, TLS renewal, owner
recovery, stuck Lab cleanup, failed migration, backup failure, disk
failure, Lab Host resource pressure).
PRODUCTION_NETWORK_SECURITY.md prominently documents the one genuine
architectural gap this phase surfaced: the Gateway's existing
env.internal_ip mechanism for reaching a Lab container assumes Gateway and
Lab share a Docker daemon, which breaks once Labs run on a genuinely
separate rn-lab-host-01 VM. The network-policy half is built (a firewall
allowance for Gateway->Lab-Host on a published port range); the
application half (Provisioner/Gateway address handling) is an explicit,
reviewed, NOT-YET-BUILT follow-up flagged there rather than silently
decided.
Updated LAB_ARCHITECTURE.md, ENGINEERING_SOP.md, README.md, and
platform/README.md with Phase 4 pointers, consistent with how every prior
phase updated these.
Status: PHASE 4 BUILD COMPLETE / PRODUCTION DEPLOYMENT PENDING HARDWARE.
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