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scooby87 03e2da5805 feat(postgres,mariadb)!: drop plaintext user passwords (#4078)
## What this PR does

Removes the plaintext `users[].password` field from the `apps/postgres`
and `apps/mariadb` charts (and the mariadb `root` account), so
managed-database passwords can no longer be pinned in tenant values or
committed to git. Passwords are always chart-generated into the
`<release>-credentials` Secret and preserved across reconciles via
`lookup`, matching the model `redis`/`valkey` already use. This closes
the "User passwords" item of the portal upstream epic
(aenix-org/cozyportal#1060).

The generated password never lands in the init-script Secret or the SQL
it runs: the postgres init-job reads each user's password from the
mounted `<release>-credentials` Secret at run time and applies it
through a psql variable (`ALTER ROLE … WITH PASSWORD :'pw'`), so it does
not linger in the init-script manifest a tenant can read. It does live
in cleartext `stringData` in the `<release>-credentials` Secret itself,
which is a chart manifest and therefore kept in Helm release history for
`MaxHistory` revisions like any chart-generated secret — that residue is
exactly why rotation cannot be built on the chart (see below). A
`password` or a `passwordRotation` key left over in a tenant's values is
accepted-but-inert and draws an admission warning, so an operator
editing it is told it has no effect rather than getting a silent 200.

Backup/restore into a copy keeps the target's chart-managed credentials
working: the CNPG driver clears `bootstrap.enabled` once recovery is
healthy so the init-job re-applies the generated passwords onto the
recovered roles, and the MariaDB driver excludes `mysql.global_priv`
from the dump (`ignoreGlobalPriv`) for backups captured from this
release onward, so restoring one of those into a copy does not clobber
the target's chart-managed users or `root`. Excluding the grant table
has a flip side, and it applies to every MariaDB restore, not only a
to-copy one: only accounts declared through `User` CRs (the chart's
`users` map) are captured, so an account created out of band directly in
MySQL is in no backup and a restore brings back its data and `mysql.db`
grants but not the account itself. This is also a backup-side fix only:
a restore from a backup taken **before** this change still replays the
source's `mysql.global_priv` and overwrites the target's users and
`root`, and `root` then needs an out-of-band reset (the operator applies
`rootPasswordSecretKeyRef` only at datadir bootstrap, so there is no
in-band path). See `docs/operations/backup-classes.md` for the
convergence window, the out-of-band-account limitation, and this
old-backup caveat.

Password **rotation** is deliberately **not** in this PR. A
chart-rendered credentials Secret keeps its cleartext in Helm release
history for `MaxHistory` revisions, so a rotation built on it cannot
revoke a leaked password; rotation is being reworked as a controller
that owns the Secret — design proposal in cozystack/community#72.

Migration is seamless: existing releases keep their current passwords on
upgrade (the value already lives in `<release>-credentials`, which
`lookup` re-reads and preserves); a `password` still present in a
tenant's values is ignored, so no existing HelmRelease fails validation.

Verification: `helm unittest` passes for both charts (postgres 87,
mariadb 126, including render-time username guards that reject any name
k8s would later reject as an invalid Secret key or User resource name);
`go build ./...`, `go vet`, the backup-controller tests and the
apps-apiserver tests are green; `make generate` was run with the
CI-pinned `cozyvalues-gen` v1.6.0 so `values.schema.json`, the READMEs,
the API types, and the `cozyrds` ApplicationDefinitions are all in sync
(the branch was rebased onto `main`, which reconciled cleanly with the
read-replica autoscaling feature that landed there).

### Screenshots

N/A — no UI change.

### Downstream repositories

- [ ] [cozystack/website](https://github.com/cozystack/website) -
follow-up: affected — `content/en/docs/next/cozystack-api/go-types.md`
is hand-written and still shows `Password:` in the Go examples, and the
managed-app reference pages regenerate from these chart READMEs, so both
document `users[name].password` until refreshed (not yet filed).
- [ ]
[cozystack/terraform-provider-cozystack](https://github.com/cozystack/terraform-provider-cozystack)
- follow-up: affected — the provider hand-maintains the postgres/mariadb
schemas and per-field defaults; this PR removes `users[].password`. A
follow-up issue/PR is needed there (not yet filed).

`terraform-provider-cozystack` and `website` are reached by this diff;
both boxes are left unticked because the follow-ups are not yet filed.
Same-repo future work this change suggests: the controller-owned
password rotation (design in cozystack/community#72), and extending the
"passwords only in the Secret" model to the other engines that still
accept plaintext (`clickhouse`, `mongodb`, `nats`, `opensearch`,
`rabbitmq`, `vpn`).

### Release note

```release-note
feat(postgres,mariadb)!: passwords for managed PostgreSQL and MariaDB users can no longer be set via `users[].password` — they are always auto-generated and stored only in the `<release>-credentials` Secret, never rendered into the init-script or the SQL it runs. Existing releases keep their current passwords on upgrade; a `password` (or a `passwordRotation`) left in values is ignored with an admission warning. Password rotation is deferred to a follow-up controller design (cozystack/community#72). MariaDB backups now exclude the `mysql.global_priv` grant table (`ignoreGlobalPriv`), so a restore recreates only accounts declared through the chart's `users` map — an account created out of band directly in MySQL is not captured and must be recreated after a restore.
```
2026-09-25 15:49:53 +03:00
..

Chainsaw E2E tests

The Cozystack E2E app suite, written for Kyverno Chainsaw — a declarative, Kubernetes-native E2E test framework (CNCF, part of the Kyverno project; successor to KUTTL).

This directory replaces the per-app BATS suite that used to live in hack/e2e-apps/*.bats. The CI e2e job runs chainsaw test hack/e2e-chainsaw/ after make install-cozystack; cluster bootstrap (hack/e2e-prepare-cluster.bats, hack/e2e-install-cozystack.bats) and the OpenAPI checks (hack/e2e-test-openapi.bats) remain BATS.

Layout

hack/e2e-chainsaw/
├── .chainsaw.yaml          # global Configuration (namespace, timeouts, JUnit report)
├── _lib/                   # shell reused by the script-heavy suites
│   ├── run-kubernetes.sh   #   tenant Kubernetes bringup + LB/NFS/ouroboros checks
│   └── remediation-guard.sh
├── <app>/
│   ├── chainsaw-test.yaml  # one or more Test definitions
│   └── <app>.yaml          # the manifests the test applies
└── ...

Suites: postgres, bucket, mariadb, mongodb, redis, valkey, qdrant, clickhouse, kafka, rabbitmq, etcd, openbao, harbor, foundationdb, external-dns, kuberture, vminstance, gateway, opensearch, kubernetes-latest, kubernetes-previous, securitygroup.

What Chainsaw buys over the BATS suite

  • Readable tests — a list of resources and expected states, not shell control flow. The timeout N sh -ec "until kubectl get ..." + kubectl wait pair that appeared ~100 times collapses into a single assert that polls existence and state together.
  • Distinguishable failure modes — "object never created", "created but never ready", and "wrong status" all surface as a structured diff instead of an opaque shell timeout.
  • Automatic diagnostics — catch blocks dump events, describe, and pod logs on any failure (the BATS suite only did this in harbor.bats, by hand).
  • Automatic cleanup — resources Chainsaw applied are deleted (and waited on) in reverse order; finally covers operator-created leftovers.
  • CI-ready output — a JUnit chainsaw-report.xml is emitted for the test summary.

Test anatomy

Each suite is a directory with a chainsaw-test.yaml (one or more Test docs) plus the manifests it applies. A step has try (operations: apply, assert, error, script, delete, …), optional catch (diagnostics on failure), and optional finally (teardown regardless of outcome).

Declarative suites assert on status.conditions and concrete fields. Inherently imperative suites keep their logic in script steps:

  • openbao — bao operator init/unseal via kubectl exec.
  • kuberture — jq on Service annotations + external-dns split-horizon log assertions.
  • gateway — admission-rejection cases that need kubectl --as impersonation or error-message greps; the tenant apex is read from the namespace namespace.cozystack.io/host label at runtime so they pass on any host.
  • kubernetes-latest/previous — wrap _lib/run-kubernetes.sh (Kamaji bringup, port-forward, LB/NFS/ouroboros). The script cds to the repo root (the test dir is hack/e2e-chainsaw/<suite>, so repo root is ../../..).

Conventions / gotchas (Chainsaw v0.2.15)

  • Condition asserts use the filter-as-list form, not the documented [0] index:
    status:
      (conditions[?type == 'Ready']):
      - status: "True"
    
    The (conditions[?type == 'Ready'])[0]: {status: "True"} idiom fails with "field not found in the input object".
  • A reading of a failure diff: the "actual" side is a projection onto the expected fields — status: {} means the JMESPath expression failed, not that status is empty. Read the error line above the diff first.
  • error with a bare resource ref (name only) asserts the resource does not exist (used for "PVC reclaimed", "no backup schedule", "child has no Gateway HR").
  • script runs in the test directory with $NAMESPACE set to the config namespace (tenant-test).

Running locally

Requires a cluster with Cozystack installed and a tenant-test namespace (the environment hack/e2e-install-cozystack.bats produces). bucket additionally needs mc, nc, and jq on the host; kuberture/openbao/harbor need jq.

# install chainsaw
go install github.com/kyverno/chainsaw@latest   # or: brew install kyverno/chainsaw/chainsaw

# run all suites (config picked up from .chainsaw.yaml)
cd hack/e2e-chainsaw
chainsaw test

# run a single suite
chainsaw test postgres/

kubernetes-latest/kubernetes-previous each bring up a full tenant Kubernetes cluster (~25 min, real worker nodes) and vminstance boots a nested VM — expect a long run for the full set.

CI integration

The e2e job in .github/workflows/pull-requests.yaml runs make -C packages/core/testing test-chainsaw (which execs chainsaw test hack/e2e-chainsaw/ inside the e2e sandbox) and uploads chainsaw-report.xml. The sandbox image (packages/core/testing/images/e2e-sandbox/Dockerfile) ships the chainsaw binary alongside kubectl/helm/mc/jq/nc.