## Context
foolery, terminal, and claude-memory each had their own
`stacks/<x>/secrets/` directory with a plaintext EC-256 private key
(privkey.pem, 241 B) and matching TLS certificate (fullchain.pem, 2868 B)
for *.viktorbarzin.me. The 92 other stacks under stacks/ symlink
`secrets/` → `../../secrets`, which resolves to the repo-root
/secrets/ directory covered by the `secrets/** filter=git-crypt`
.gitattributes rule — i.e., every other stack consumes the same
git-crypt-encrypted root wildcard cert.
The 3 outliers shipped their keys in plaintext because `.gitattributes`
secrets/** rule matches only repo-root /secrets/, not
stacks/*/secrets/. Both remotes are public, so the 6 plaintext PEM files
have been exposed for 1–6 weeks (commits 5a988133 2026-03-11,
a6f71fc6 2026-03-18, 9820f2ce 2026-04-10).
Verified:
- Root wildcard cert subject = CN viktorbarzin.me,
SAN *.viktorbarzin.me + viktorbarzin.me — covers the 3 subdomains.
- Root privkey + fullchain are a valid key pair (pubkey SHA256 match).
- All 3 outlier certs have the same subject/SAN as root; different
distinct cert material but equivalent coverage.
## This change
- Delete plaintext PEMs in all 3 outlier stacks (6 files total).
- Replace each stacks/<x>/secrets directory with a symlink to
../../secrets, matching the fleet pattern.
- Add `stacks/**/secrets/** filter=git-crypt diff=git-crypt` to
.gitattributes as a regression guard — any future real file placed
under stacks/<x>/secrets/ gets git-crypt-encrypted automatically.
setup_tls_secret module (modules/kubernetes/setup_tls_secret/main.tf) is
unchanged. It still reads `file("${path.root}/secrets/fullchain.pem")`,
which via the symlink resolves to the root wildcard.
## What is NOT in this change
- Revocation of the 3 leaked per-stack certs. Backed up the leaked PEMs
to /tmp/leaked-certs/ for `certbot revoke --reason keycompromise`
once the user's LE account is authenticated. Revocation must happen
before or alongside the history-rewrite force-push to both remotes.
- Git-history scrub. The leaked PEM blobs are still reachable in every
commit from 2026-03-11 forward. Scheduled for removal via
`git filter-repo --path stacks/<x>/secrets/privkey.pem --invert-paths`
(and fullchain.pem for each stack) in the broader remediation pass.
- cert-manager introduction. The fleet does not use cert-manager today;
this commit matches the existing symlink-to-wildcard pattern rather
than introducing a new component.
## Test plan
### Automated
$ readlink stacks/foolery/secrets
../../secrets
(likewise for terminal, claude-memory)
$ for s in foolery terminal claude-memory; do
openssl x509 -in stacks/$s/secrets/fullchain.pem -noout -subject
done
subject=CN = viktorbarzin.me (x3 — all resolve via symlink to root wildcard)
$ git check-attr filter -- stacks/foolery/secrets/fullchain.pem
stacks/foolery/secrets/fullchain.pem: filter: git-crypt
(now matched by the new rule, though for the symlink target the
repo-root rule already applied)
### Manual Verification
1. `terragrunt plan` in stacks/foolery, stacks/terminal, stacks/claude-memory
shows only the K8s TLS secret being re-created with the root-wildcard
material. No ingress changes.
2. `terragrunt apply` for each stack → `kubectl -n <ns> get secret
<name>-tls -o yaml` → tls.crt decodes to CN viktorbarzin.me with
the root serial (different from the pre-change per-stack serials).
3. `curl -v https://foolery.viktorbarzin.me/` (and likewise terminal,
claude-memory) → cert chain presents the new serial, handshake OK.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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