[ac-pplx]

Summary

A planned change renames sandbox_k8s_executions to sandbox_execution_records and node_k8s to node_identities in place, leaving compatibility views under the old names. This change adds the test infrastructure to check, before those migrations are written, that today's code works unchanged through the views. It changes no migration and no production code.

• Opt-in schema variant. pplx-space-db-test-fixtures applies a candidate DDL file to the migrated test template after the migrations when SPACE_TEST_POSTGRES_SCHEMA_VARIANT=execution-record-views is set. The file is crates/test_support/db/test/fixtures/schema-variants/execution_record_views.sql, marked as a test candidate and not a migration. Unset or empty, the template is unchanged. An unknown name, or a value that is not valid UTF-8, fails template creation before the migrations run, so a typo cannot pass as a variant run. The candidate renames the tables and pod_materialized_at, k8s_node_name and k8s_node_uid, adds the new columns, makes pod_name and pod_namespace nullable, and creates the views. The views keep the old column lists in order, including the three runtime_upgrade_* execution columns from [db] record a stay-stopped runtime upgrade decision on its Kubernetes execution #1304, and use WITH CASCADED CHECK OPTION. It also grants space_credmgr the base column reads the invoker views need. The service logins' privileges on the views come from space_migrator's default privileges and bootstrap-roles, as for any new relation.

• Test-side fixes. Two api test helpers create row triggers on sandbox_k8s_executions, which Postgres refuses on a view (42809). They now name the table through pplx_space_db_test_fixtures::physical_table(...), which returns the renamed table in variant mode and the old name otherwise.

• Pins. crates/l30_storage/db/migrate/src/bootstrap_roles/tests/execution_record_view_tests.rs runs statement shapes from today's code and tests as the real bootstrap-roles logins. The server is migrated with control-plane up and the candidate is applied as space_migrator. Shapes covered:

  • targetless ON CONFLICT DO NOTHING … RETURNING, and the retired-generation INSERT … SELECT … WHERE NOT EXISTS
  • the claims' generation allocation MAX(generation) + 1 through the view
  • the node inventory's aliased ON CONFLICT (node_id) DO UPDATE … WHERE node_k8s.k8s_node_name IS DISTINCT FROM EXCLUDED…
  • the check option refusing a non-k8s row
  • the base default filling an omitted managed_by
  • FOR UPDATE OF … NOWAIT and SKIP LOCKED on view joins
  • LOCK TABLE through a view, as the api's create-readiness contention test takes it (it locks view and base)
  • UPDATE … FROM
  • statements prepared before the rename (re-resolved to the views, kept prepared with the same prepare_time, no 0A000)
  • the views' privileges from default privileges alone, for space_user, space_creds and space_ro
  • invoker-view privilege checks for each view separately, including the space_credmgr column grants

  Under nextest they share one bare Postgres server that the bare-postgres setup script (ci/scripts/setup-nextest-postgres.sh --bare; its default mode is unchanged) starts for the run. The first pin bootstraps and migrates a template database on it under an advisory lock, and each pin clones a database of its own from it. They still share cluster-global state: the roles bootstrap provisions and a probe role the template build creates. A pin must not change it; the invoker pin's second bootstrap is safe only because it converges the shared roles to the values the template build gave them. Under plain cargo test each pin starts its own container. They need Docker, so they stay in the nextest privileged group. The LOCK TABLE pin's blocked writes use a 20 ms lock_timeout (was 200 ms): lock_timeout bounds only lock waits, so an unblocked write succeeds whatever the bound.

• Docs. The fixtures crate README ("Schema variants") and a pointer in docs/rust/space-conventions.md explain how to run the variant. There is no CI job for it: it would repeat the whole Rust test job.

Constraints for the real migrations. The Postgres behaviour in 1 and 2 is pinned on PG16 and PG17; what it means for the production callers comes from reading their code, and 3 comes from reading the candidate:

1. Invoker views check every base column the view reads. Through a security_invoker view, Postgres checks the caller's base-table SELECT on every column the view's query reads, not only the ones the caller selects. The service logins are unaffected: bootstrap-roles grants space_user and space_creds SELECT, INSERT, UPDATE, DELETE on both base tables, and the credential manager connects as space_creds. A session that holds only the space_credmgr capability role is affected, such as the credential-injection store's resolution test (SET LOCAL ROLE space_credmgr). With its old column grants plus managed_by, its reads through either view fail with 42501. The candidate therefore grants space_credmgr base SELECT on every column the views read, so that role can now read pod_uid and the other base columns directly. The view's column grants still refuse pod_uid through the view. A view that checks base privileges as its owner, the default without security_invoker, would keep that role's old base fence. Every column later added to either table must also be added to the view and to that grant.

2. Base unique indexes still arbitrate rows the views hide. A targetless ON CONFLICT DO NOTHING arbitrates every unique index on the base table, and the views hide other substrates' rows:

   • with a non-k8s active execution, the execution claim through the view returns no row, even though the view shows no active execution;
   • claims allocate their generation as MAX(generation) + 1 through the view, while (sandbox_id, generation) is unique across substrates, so a hidden row of any state at that generation also makes the claim return no row, and every retry allocates the same generation;
   • the node inventory upsert ON CONFLICT (node_id) DO UPDATE on a hidden node_identities row fails with 44000 (new row violates check option for view "node_k8s").

   In both claim cases, the claims' follow-up read through the view finds no active execution: the api claim fails with failed to create active Kubernetes execution row, and the placement claim's read finds no row. None of this happens today, because no non-k8s rows exist yet.

3. Nullable pod_name/pod_namespace. Making them nullable means an insert through the view no longer rejects a NULL pod_name. The views' WHERE managed_by = 'k8s' does not restore that. Today's code never writes one.

Validation

At bac756cd (rebased on main past #1407, #1408 and #1426), on a Linux host with Docker, Rust 1.99.1 and nextest 0.9.133, on PG16:

• cargo nextest run -p pplx-space-db-migrate -p pplx-space-db-test-fixtures -p pplx-space-api --locked --all-features --run-ignored all --ignore-default-filter --retries 1 --no-fail-fast with SPACE_CI_REQUIRE_TEST_DEPS=1, once unset and once with SPACE_TEST_POSTGRES_SCHEMA_VARIANT=execution-record-views: 2602/2602 passed in each mode, no skips, no dependency-skip marker, identical per-test results. python3 ci/scripts/check-test-durations.py target/nextest/default/junit.xml ci/test-duration-budget.toml passes after both. A bogus variant value fails template setup.
• The pplx-space-db-migrate privileged group, run as root from the build as CI does, 12 threads, three times, then the duration check: the five pins took 0.49-0.66 s each, and the check passed. With a container per pin they took 2.7-4.6 s, and the check failed on all three runs. PG17 (postgres:17-alpine): 16/16. Plain cargo test, a container per pin: 5/5.
• Each pin's key assertion fails under a mutation of what it pins: execution view column order; node_k8s check option; the LOCK TABLE released before the blocked writes; the execution view's managed_by filter; node_k8s without security_invoker.
• cargo fmt --all -- --check, cargo check --workspace --all-targets --all-features --locked, and cargo clippy -p pplx-space-db-migrate --all-targets --all-features -- -D warnings: clean. bash ci/scripts/run-archcheck.sh "$(git rev-parse origin/main)" "": no findings.

At this head (ef1f9305, which adds review fixes on top: comments on the shared roles, and the test helper's bare-server handling in pg_test_support.rs, which now errors on a non-UTF-8 server URL and fails, rather than skips, when a published server is unreachable): the migrate privileged group passed 16/16 with the duration check (pins 0.51-0.61 s); plain cargo test 5/5; fmt and clippy clean. CI on GitHub at bac756cd ran the bare setup in the privileged container and the pins in 0.53-0.72 s.

From the rebase across the crate move: when main gained #1304's runtime_upgrade_* execution columns, two pins failed as they should (views_keep_the_old_row_types_and_writes_reach_the_base_tables on the row type, statements_prepared_before_the_rename_run_through_the_views with 0A000 cached plan must not change result type) until the candidate's view and grant carried them.

From an earlier head, before the rebase across the crate move, and not rerun here: the PG17 runs, the full rdeps(pplx-space-db-test-fixtures) comparison over 46 packages on PG16 and PG17 (no per-test difference between modes or versions), clippy, and the checks that each pin's key assertion fails without the property it pins. Before the trigger fix, a PG16 variant run of the api suite had five variant-only failures, all 42809 "sandbox_k8s_executions" is a view, in controllers::sandbox::lifecycle::characterization_tests::kubernetes and controllers::substrate::kubernetes::tests::kubernetes_tests.

Severity and risk

Severity: does not apply (test infrastructure). Risk: with the variable unset the fixtures behave as before, as the default-mode run above shows. The pins add five tests to the privileged CI half, about 0.5-0.7 s each, on one Postgres server the bare-postgres setup script starts for the run; the script's default mode is unchanged. Roll back by reverting the commit.

Rollout

None: no migration and no production code. Mixed-version: does not apply. The candidate DDL runs only in test databases: the shared fixtures apply it when the variable is set, and the five pins always apply it, each in its own database on their shared server (its own container under cargo test).

Not covered

• The fixture suites run as the superuser, so a variant run checks privileges only where a test switches role (the credential-injection resolution test, as space_credmgr). The pins cover the bootstrap-roles logins.
• No CI job runs the variant.
• Once the real rename lands, the default physical_table result names a view and the pins' candidate no longer applies. A crates change must make them work on either schema before that migration, because the migration-isolation guard rejects changes to physical_table, the api test helpers and the pins in a migration PR.
• The constraints above need decisions before the real migrations; they are tracked separately.

AI assistance: An AI agent (Claude Code) wrote the code, tests, candidate DDL, documentation, and this description, rebased the change across the crate move and onto main past #1407, #1408 and #1426, and restructured the pins to share one server under the test-time gate.

[ac-pplx]

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Commit: d2433844382d.

Walkthrough

The change adds a selectable PostgreSQL schema variant that renames execution and node tables and creates compatibility views under their former names. Template initialization applies the selected SQL after migrations, and two API test triggers resolve renamed tables through the fixtures API. New migrator tests exercise view types, privileges, writes, filtering, locks, prepared statements, and bootstrap behavior using database clones on a bare PostgreSQL server. Nextest assigns the suite to the bare-server setup.

Possibly related PRs

• perplexityai/SPACE#1309: Describes the same execution-record compatibility-view variant, setup mode, and test pins.
• perplexityai/SPACE#1310: Adds bootstrap grant exclusions for compatibility views, a behavior area covered by this pull request’s privilege tests.

Merge Risk: Minimal · up to d2433

This change only adds opt-in test infrastructure and tests for the planned execution-record view compatibility check. It does not touch production code or migrations, and the default test behavior is unchanged. No merge-blocking risk was found in the reviewed files.

Security architecture risk: Low · up to d2433

The changes are confined to test infrastructure and do not deploy a production migration. The candidate deliberately broadens a database capability role’s reads, and externally selected test servers are trusted with administrative operations. These assumptions deserve attention before reusing the design in production.

Retained concerns
No architecture-level concerns identified.

Security review details

Security Blast Radius

• inferred — The normal path contains administrative mutations to a disposable test cluster. An externally supplied bare-server URL expands that scope to its selected PostgreSQL cluster: the helper retains only host and port, reconnects as postgres, and callers bootstrap cluster-global roles and create or replace test databases. This requires trusted test-process configuration and successful server authentication; no remote application-controlled path was established.

Trust Boundaries and Controls

• observed — View filtering is not a restriction on separately granted base-table access. Counterevidence also limits the effective privilege-change claim: unchanged bootstrap grants already give the space_creds service login broad relation access and membership in space_credmgr. The new tests deliberately use a capability-only probe to expose the narrower role’s changed boundary.

Resilience and Maintainability Implications

• observed — Pin-template creation and cloning hold a session advisory lock. Completion is marked only after bootstrap and migration; a subsequent pin drops and rebuilds an unfinished template. Separately, ordinary fixture initialization propagates errors but has no template-drop recovery guard, a limitation already present at the comparison base. Dedicated-container teardown contains that normal-path residue; externally managed servers have different cleanup ownership.

Hardening Proposals

• proposed — Before promoting this candidate into a production migration, explicitly decide whether capability-only callers may read the additional base columns and non-Kubernetes rows. Preserve that authorization decision as a contract rather than treating successful compatibility-view reads as proof of equivalent least privilege.

Pre-merge checks: 4 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
Title check		The title is "[cr-test] db-test-fixtures: run the Postgres suites against execution-record compatibility views". It fails the title requirements. The required format is a lowercase area prefix followe…	Use a single prefix. Remove "[cr-test]" and keep the area prefix only, for example "db-test-fixtures: run Postgres suites against execution-record compatibility views". The area is the fixtures crate, so the prefix can also be written as "[…

Passed checks: 4 passed

Check name	Status	Explanation
Description Follows The Pr Template		The authored description contains all required sections with real content: “## Summary” explains the change, “## Validation” lists commands and results, “## Severity and risk” states that severity doe…
Bug Fixes Name A Regression Test		PASS: This pull request is test infrastructure, not an application bug fix. The only changed files under crates/l40_api are characterization/test modules, where trigger setup now targets the physica…
Weakened Safeguards Are Justified		No weakened safeguard is introduced. The diff adds five execution-record view tests and assigns them to the new bare-Postgres setup and the existing privileged group in .config/nextest.toml. Existin…
Public-Safe Content		No public-safety violation appears in the reviewed diff, title, or description. The only URL-like additions are parameterized or local PostgreSQL test connection strings. No credentials, tokens, keys,…

Full details: Description Follows The Pr Template

Explanation

The authored description contains all required sections with real content: “## Summary” explains the change, “## Validation” lists commands and results, “## Severity and risk” states that severity does not apply and describes risk, and the line beginning “AI assistance:” identifies the tool and drafted or changed parts.

Full details: Bug Fixes Name A Regression Test

Explanation

PASS: This pull request is test infrastructure, not an application bug fix. The only changed files under crates/l40_api are characterization/test modules, where trigger setup now targets the physical table for the schema variant. The new migrator tests and fixture changes validate compatibility-view behavior; no production application behavior is fixed.

Full details: Weakened Safeguards Are Justified

Explanation

No weakened safeguard is introduced. The diff adds five execution-record view tests and assigns them to the new bare-Postgres setup and the existing privileged group in .config/nextest.toml. Existing assertions remain; the two trigger changes redirect test setup to the physical table without removing coverage. The only early returns are in the new tests when the optional Postgres dependency is unavailable, and the description gives that dependency reason. No lint, CI check, allowlist, baseline, exclusion, or test assertion is removed or loosened.

Full details: Public-Safe Content

Explanation

No public-safety violation appears in the reviewed diff, title, or description. The only URL-like additions are parameterized or local PostgreSQL test connection strings. No credentials, tokens, keys, internal hostnames or private links, cloud IDs/ARNs, workstation paths, production logs or measurements, incidents, or undisclosed security vulnerability details were found.

Full details: Title check

Explanation

The title is "[cr-test] db-test-fixtures: run the Postgres suites against execution-record compatibility views". It fails the title requirements. The required format is a lowercase area prefix followed by a colon, or the area in square brackets, followed by a lowercase summary with no trailing period, ticket IDs, or internal links. The title has two prefixes, "[cr-test]" and "db-test-fixtures:", which breaks the single-prefix format. It also contains the internal "[cr-test]" marker, which reads as a non-descriptive internal tag. The summary part after the colon does start with a lowercase word, and the content matches the changeset: opt-in test infrastructure that applies candidate execution-record compatibility views after migrations.

Resolution

Use a single prefix. Remove "[cr-test]" and keep the area prefix only, for example "db-test-fixtures: run Postgres suites against execution-record compatibility views". The area is the fixtures crate, so the prefix can also be written as "[db-test-fixtures] run Postgres suites against execution-record compatibility views". Keep the lowercase summary start and drop any trailing period.

Recent review info

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Commit: d2433844382d.

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Merge risk	Low	Override 2
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Failed pre-merge checks:
- Title check:
Use a single prefix. Remove "[cr-test]" and keep the area prefix only, for
example "db-test-fixtures: run Postgres suites against execution-record
compatibility views". The area is the fixtures crate, so the prefix can also be
written as "[db-test-fixtures] run Postgres suites against execution-record
compatibility views". Keep the lowercase summary start and drop any trailing
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• File: .coderabbit.yaml
• Commit: d243384
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Commits

Reviewing files that changed from the base of the PR and between c137bfe and d243384.

Files ignored due to path filters: 1

• Cargo.lock is excluded by !**/*.lock, !**/Cargo.lock

Files selected for processing: 14

• .config/nextest.toml
• ci/scripts/setup-nextest-postgres.sh
• crates/l30_storage/db/migrate/Cargo.toml
• crates/l30_storage/db/migrate/src/bootstrap_roles/tests.rs
• crates/l30_storage/db/migrate/src/bootstrap_roles/tests/execution_record_view_tests.rs
• crates/l30_storage/db/migrate/src/bootstrap_roles/tests/postgres_bootstrap_tests.rs
• crates/l30_storage/db/migrate/src/pg_test_support.rs
• crates/l40_api/api/src/controllers/sandbox/lifecycle/characterization_tests/kubernetes.rs
• crates/l40_api/api/src/controllers/substrate/kubernetes/tests.rs
• crates/test_support/db/test/fixtures/README.md
• crates/test_support/db/test/fixtures/schema-variants/execution_record_views.sql
• crates/test_support/db/test/fixtures/src/lib.rs
• crates/test_support/db/test/fixtures/src/tests.rs
• docs/rust/space-conventions.md

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[ac-pplx]

Closing: CodeRabbit configuration test finished; the tested configuration is in #1496.