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seaweedfs/weed/iamapi
Chris Lu ff6f9fd90a iam: honor configured credential store for IAM API policies and propagate to S3 caches (fixes #9518) (#9522)
* iamapi: route managed policies through credential manager (fixes #9518)

CreatePolicy via the IAM API wrote straight to the filer
/etc/iam/policies.json, ignoring any non-filer credential store. When
credential.postgres was configured, policies created via the IAM API
landed only in the filer while the Admin UI wrote to postgres,
producing a split-brain where ListPolicies/GetPolicy never saw the
Admin UI's policies and vice versa.

GetPolicies/PutPolicies on IamS3ApiConfigure now load managed policies
from credentialManager and persist Create/Update/Delete as a delta
against the store. Inline user/group policies still live in the legacy
policies.json file (no credential-store API for them yet). Pre-existing
managed policies in the legacy file are merged on read so deployments
don't lose data, and re-persisted to the store on the next write so
the legacy file is drained over time.

* credential: route IAM API inline policies through credential manager

Extends the #9518 fix to user-inline and group-inline policies so the
IAM API never writes the legacy /etc/iam/policies.json bundle directly.
The previous patch only routed managed policies; this one finishes the
job for the other two policy types.

- Add GroupInlinePolicyStore + GroupInlinePoliciesLoader optional
  interfaces, mirroring the existing user-inline ones, and matching
  Put/Get/Delete/List/LoadAll wrappers on CredentialManager.
- Implement group-inline storage in memory (new map), filer_etc (new
  field on PoliciesCollection, reusing the legacy file under policyMu),
  and postgres (new group_inline_policies table with ON DELETE CASCADE
  off the groups FK).
- Wire the new methods through PropagatingCredentialStore so wrapped
  stores still delegate correctly.
- IamS3ApiConfigure.PutPolicies now applies managed + user-inline +
  group-inline as deltas through the credential manager; the legacy
  /etc/iam/policies.json file is never written when a credential
  manager is wired up. GetPolicies still reads the legacy bundle once
  as a fallback so unmigrated data is picked up and re-persisted into
  the store on the next write.

* credential: propagate SaveConfiguration writes to running S3 caches

Postgres (and any non-filer) credential stores never fired the S3 IAM
cache invalidation path on bulk identity / group updates. The
PropagatingCredentialStore had explicit Put/Remove handlers for
single-entity calls (CreateUser, PutPolicy, etc.) but inherited
SaveConfiguration unchanged from the embedded store, so the bulk path
the IAM API takes at the end of every handler was silent. Inline-policy
changes recompute identity.Actions and persist via SaveConfiguration,
so until restart the cached Actions on each S3 server stayed stale and
authorization decisions used the pre-change view.

Override SaveConfiguration to snapshot the prior user / group lists,
delegate the save, then fan out PutIdentity / PutGroup for what's in
the new config and RemoveIdentity / RemoveGroup for what got pruned.
Reuses the existing SeaweedS3IamCache RPCs, no protobuf changes.

* iamapi: drain legacy policies.json after authoritative credential-store writes

Review pointed out a resurrection bug: GetPolicies still reads
/etc/iam/policies.json as a one-way migration fallback, but PutPolicies
in the credential-manager path never wrote that file, so legacy-only
entries reappeared on the next read even after the IAM API "deleted"
them. PutPolicies now overwrites the bundle with an empty {} after a
successful credential-store write, unless the store is filer_etc
(which owns the bundle as its own inline-policy backing — clearing it
would wipe filer_etc's data). Also wraps the filer read, JSON
unmarshal, and marshal errors with context per the other review
comments.
2026-05-17 13:15:27 -07:00
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