Aleksei Sviridkin c94a1da5bb feat(mongodb): add TLS support via PSMDB operator-managed certificates (#2692)
## What this PR does

Enables operator-managed TLS for MongoDB and stops handing tenants any
Secret that carries private key material.

- Percona Server for MongoDB serves TLS unconditionally (`mode:
preferTLS`), so this PR drops the misleading `tls.enabled` toggle rather
than pretending the chart controls it.
- The tenant no longer receives the operator's CA Secret
(`<release>-ca-cert`, which holds `ca.key`) or the leaf
(`<release>-ssl`). Both were previously reachable, and either one is a
private key in tenant hands, the CA one is a full trust-chain
compromise.
- The chart declares a `TenantProjection` sentinel naming its CA source
Secret (`<release>-ssl`, the operator-managed leaf, which carries
`ca.crt`), and the ResourceDefinition selects the resulting key-free
`<release>.tenant-ca` projection by the engine-agnostic
`internal.cozystack.io/tenant-ca` label. The CA-extraction controller
reads the sentinel and publishes the projection holding only `ca.crt`.
The tenant gets what it needs to verify the server and nothing else.

### Why the include also carries an exclude list

The trust-anchor selector matches by label with no name constraint, so
any Secret in the namespace that acquired that label would be promoted
with its data copied verbatim. The enumerable dangerous set is therefore
excluded explicitly: the CA, both leaves, the rotation snapshots
(`-ssl-old`, `-ssl-internal-old`, same server keys as the leaves, and
unlike them they carry no owner reference, so an interrupted rotation
can leave them behind after the release is gone), the system-user
passwords, the at-rest encryption key, the keyfile, the object-storage
credentials, and both forms of the operator's internal Secret.

That backstop is bounded, and the comment says so: matching is by exact
name with no globs, so a Secret a future operator version introduces, or
a transient object an issuer creates mid-renewal, stays in scope of the
label-only include. The per-user Secrets cannot be enumerated at all,
since their names carry the username. The primary defence remains that
the controller stamps only its own projection; this closes the
enumerable set, not the whole surface.

### Release note

```release-note
feat(mongodb): stop exposing TLS private key material to tenants and publish the CA as a key-free trust anchor
```
2026-09-01 14:16:24 +04:00
2025-10-08 09:43:34 +05:00
2024-02-08 12:04:32 +01:00

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