f51924fdbc
Adds optional per-script overrides for the six Rhai sandbox knobs
(max_operations, max_string_size, max_array_size, max_map_size,
max_call_levels, max_expr_depth). The executor merges its defaults
with each script's overrides on every call; the manager validates
overrides against an admin-set ceiling at write time, so the
executor trusts whatever is stored.
Storage chose JSONB on the existing scripts table over six new
columns: lets future knobs land as code-only changes, keeps the
sparse common case (most scripts override nothing) cheap to store
and serialize, and matches how the manager + executor pass the
config across the wire.
* 0002_sandbox.sql — ALTER TABLE scripts ADD COLUMN sandbox
JSONB NOT NULL DEFAULT '{}'
* shared::ScriptSandbox — six Option<u64> fields with
deny_unknown_fields so typos surface as 422
* Script.sandbox + ExecRequest.sandbox_overrides — typed end
to end; cluster mode just serializes the same struct
* executor-core::Limits::with_overrides — field-by-field
replacement; tests cover the override actually tightening
the live engine
* manager-core::SandboxCeiling — built-in conservative
defaults (10M ops, 1 MiB strings, 100k array/map, 128
call/expr depth); env vars override per knob, invalid
values warn-and-skip rather than blocking boot
* manager-core admin API — POST/PUT accept `sandbox`; values
above the ceiling return 422 with the specific field +
requested + ceiling; absent or `{}` keeps platform defaults
* picloud all-in-one — wires SandboxCeiling::from_env() into
AdminState
* memory_limit_mb stays in the schema, marked v1.3+ advisory
(no enforcement until OS-level isolation lands with
cluster-mode executors)
Verified live through Caddy:
* /version reports schema 2, product 0.3.0
* Script with max_operations: 500 → 507 on a 10k-iteration loop
* Same script after PUT raising to 1M → succeeds, returns 10000
* POST with max_operations: 1_000_000_000 → 422 (exceeds ceiling)
Tests:
* 13 executor-core unit tests (added 2 for override semantics)
* 20 integration tests (added 6 for sandbox CRUD + ceiling +
unknown-field rejection + executor honoring overrides)
* default cargo test --workspace stays green (integration tests
remain #[ignore]'d until DATABASE_URL is set)
Bumps:
* schema 1 → 2
* product 0.2.0 → 0.3.0
* SDK unchanged (scripts see nothing new)
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
PiCloud
A lightweight, self-hosted, event-driven serverless compute platform. Upload a Rhai script, get an HTTP endpoint. Designed to run on a single modest server with no idle CPU cost, and to scale out to a small cluster when you need it.
Status: Phase 1 — MVP scaffolding in progress.
The authoritative design lives in
serverless_cloud_blueprint.md.
Why
Existing serverless platforms are either cloud-locked, heavyweight, or both. PiCloud aims for the opposite end of the spectrum: one binary, one database, one reverse proxy — running on hardware you already own.
Architecture (one paragraph)
PiCloud splits into three logical services — manager (control plane: scripts, schedules, dashboard), orchestrator (per-node event ingress and dispatch), and executor (per-node Rhai sandbox) — each backed by a *-core Rust library. In MVP they run in a single process; in cluster mode they run as three binaries with one manager and one orchestrator + executor per node. Caddy fronts everything; PostgreSQL is the single source of truth.
See CLAUDE.md for working notes and serverless_cloud_blueprint.md for the full design.
Quick Start
Coming as scaffolding lands. For now:
# Rust toolchain (pinned via rust-toolchain.toml)
cargo check --workspace
# Run the all-in-one MVP binary (once main.rs is wired up)
cargo run -p picloud
Repository Layout
crates/
shared/ cross-cutting types
executor-core/ Rhai engine + sandbox
orchestrator-core/ event ingress, dispatch
manager-core/ control plane
picloud/ MVP all-in-one binary
picloud-{manager,orchestrator,executor}/ cluster-mode binaries (skeleton)
dashboard/ SvelteKit
caddy/ Caddyfile
docker/ Dockerfiles
docs/
git-workflow.md Trunk-based workflow
Contributing
See docs/git-workflow.md for the branching and commit conventions. TL;DR: trunk-based, short-lived branches, Conventional Commits, no force-pushing main.
License
TBD.