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zinit shutdown feature #38

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opened 2026-03-09 05:54:40 +00:00 by despiegk · 3 comments

despiegk commented

2026-03-09 05:54:40 +00:00

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source scripts/build_lib.sh 2>/dev/null && cargo_env && cargo build --release --workspace
Finished release profile [optimized] target(s) in 0.11s
Installed zinit -> /Users/despiegk/hero/bin/zinit
Installed zinit_server -> /Users/despiegk/hero/bin/zinit_server
Installed zinit_ui -> /Users/despiegk/hero/bin/zinit_ui
Installed zinit_pid1 -> /Users/despiegk/hero/bin/zinit_pid1
Requesting graceful shutdown via zinit CLI...
Requesting zinit daemon shutdown...
Shutdown accepted, waiting for all services to stop...
zinit daemon stopped (0.0s)
Waiting for zinit_server to exit (max 30s)...

theck following behavior

gracefully stop all services & jobs, use metadata in jobs (actions) to specify how to stop and kill if not done in time
do stop when timeout reached
timeout should never be longer than 30 sec
then check that all processes are gone, also based on kill others (ports and process filters)
once all clean the zinit server can shutdown
should bever take longer than 30 sec
make sure we stop/kill deepest childs first before parents till we get to where jobs are (we need to check children)

do detailed study what is happengin

make integration test for this

source scripts/build_lib.sh 2>/dev/null && cargo_env && cargo build --release --workspace Finished `release` profile [optimized] target(s) in 0.11s Installed zinit -> /Users/despiegk/hero/bin/zinit Installed zinit_server -> /Users/despiegk/hero/bin/zinit_server Installed zinit_ui -> /Users/despiegk/hero/bin/zinit_ui Installed zinit_pid1 -> /Users/despiegk/hero/bin/zinit_pid1 Requesting graceful shutdown via zinit CLI... Requesting zinit daemon shutdown... Shutdown accepted, waiting for all services to stop... zinit daemon stopped (0.0s) Waiting for zinit_server to exit (max 30s)... theck following behavior - gracefully stop all services & jobs, use metadata in jobs (actions) to specify how to stop and kill if not done in time - do stop when timeout reached - timeout should never be longer than 30 sec - then check that all processes are gone, also based on kill others (ports and process filters) - once all clean the zinit server can shutdown - should bever take longer than 30 sec - make sure we stop/kill deepest childs first before parents till we get to where jobs are (we need to check children) do detailed study what is happengin make integration test for this

despiegk commented

2026-03-09 06:02:53 +00:00

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Implementation Spec for Issue #38 — Zinit Graceful Shutdown

Current State Analysis

The system.shutdown RPC handler is a no-op stub — it logs and returns {"ok": true} but performs no actual shutdown. The Supervisor::shutdown() method exists but is never called from the RPC handler. The existing cancel_job() sends a single SIGTERM but does NOT wait, does NOT send SIGKILL on timeout, does NOT handle child processes, and ignores per-action stop_signal/stop_timeout_ms.

Key building blocks exist but are unused during shutdown:

kill_process_tree() in process.rs — deepest-first SIGTERM then SIGKILL
get_child_processes() — recursive descendant discovery via sysinfo
ActionSpec.stop_signal / stop_timeout_ms — stored but ignored

Objective

Implement a robust graceful shutdown sequence that stops all services/jobs using per-action metadata, kills deepest children first, enforces a 30-second global timeout, verifies all processes are gone, and cleanly exits.

Requirements

Gracefully stop all running services/jobs using their configured stop_signal
Wait up to per-action stop_timeout_ms for each service to exit
Cap stop_timeout_ms at 30 seconds
Send SIGKILL to the entire process group when the timeout expires
Kill deepest children first, then parents (bottom-up process tree walk)
Stop independent services in parallel; respect dependency order
Final sweep: kill remaining processes on configured ports / process filters
Verify all managed processes are gone
Hard global timeout of 30 seconds for entire shutdown
Clean up socket file and exit
Ctrl+C triggers the same graceful shutdown path
Existing 14 integration tests must pass without force-kill workarounds

Files to Modify/Create

File	Action	Description
`crates/zinit_server/src/supervisor/shutdown.rs`	CREATE	GracefulShutdown orchestrator
`crates/zinit_server/src/supervisor/mod.rs`	MODIFY	Add shutdown module, expose shutdown method
`crates/zinit_server/src/supervisor/executor.rs`	MODIFY	New `graceful_stop_job()` respecting stop_signal/timeout
`crates/zinit_server/src/rpc/system.rs`	MODIFY	Wire RPC to shutdown channel
`crates/zinit_server/src/rpc/mod.rs`	MODIFY	Pass shutdown sender to dispatch
`crates/zinit_server/src/web.rs`	MODIFY	Thread shutdown sender through web state
`crates/zinit_server/src/main.rs`	MODIFY	Create shutdown channel, wire everything, run shutdown sequence
`tests/integration/tests/shutdown.rs`	MODIFY	Add new tests for custom stop_signal and global timeout

Implementation Plan

Step 1: Shutdown channel infrastructure (main.rs, web.rs, rpc/)

Create tokio::sync::watch::channel for shutdown signal
Thread sender through web state to RPC dispatch
Add shutdown_rx to tokio::select! in main()
Dependencies: None

Step 2: `graceful_stop_job()` in executor.rs (parallel with Step 1)

Respect per-action stop_signal and stop_timeout_ms (capped at 30s)
Kill deepest children first via get_child_processes()
SIGKILL fallback after timeout
Dependencies: None

Step 3: GracefulShutdown orchestrator (shutdown.rs)

Collect active jobs, build dependency graph, compute stop waves
Execute waves in parallel under 30s global deadline
Final sweep for port listeners and process filter matches
Verify all processes gone
Dependencies: Step 2

Step 4: Wire shutdown into main.rs

Call graceful_shutdown() after select! triggers
Wrap in 30s tokio::time::timeout
Clean up socket file
Dependencies: Steps 1, 3

Step 5: Update integration tests

Verify existing 14 tests pass naturally
Add test for custom stop_signal
Add test for 30s global timeout enforcement
Dependencies: Steps 1-4

Step 6: CLI improvements

Progress display during shutdown
Dependencies: Step 4

Acceptance Criteria

system.shutdown RPC triggers actual graceful shutdown
Jobs receive their configured stop_signal
Per-service stop_timeout_ms respected but capped at 30s
SIGKILL sent after timeout (deepest children first)
Independent services stopped in parallel
Dependent services stop in correct order
Final sweep kills remaining port listeners / process filter matches
All processes verified gone before server exits
Global shutdown never exceeds 30 seconds
Socket file cleaned up on exit
All existing integration tests pass
New tests for custom stop_signal and global timeout
Ctrl+C triggers the same graceful shutdown path

## Implementation Spec for Issue #38 — Zinit Graceful Shutdown ### Current State Analysis The `system.shutdown` RPC handler is a **no-op stub** — it logs and returns `{"ok": true}` but performs no actual shutdown. The `Supervisor::shutdown()` method exists but is never called from the RPC handler. The existing `cancel_job()` sends a single SIGTERM but does NOT wait, does NOT send SIGKILL on timeout, does NOT handle child processes, and ignores per-action `stop_signal`/`stop_timeout_ms`. Key building blocks exist but are unused during shutdown: - `kill_process_tree()` in process.rs — deepest-first SIGTERM then SIGKILL - `get_child_processes()` — recursive descendant discovery via sysinfo - `ActionSpec.stop_signal` / `stop_timeout_ms` — stored but ignored ### Objective Implement a robust graceful shutdown sequence that stops all services/jobs using per-action metadata, kills deepest children first, enforces a 30-second global timeout, verifies all processes are gone, and cleanly exits. ### Requirements - Gracefully stop all running services/jobs using their configured `stop_signal` - Wait up to per-action `stop_timeout_ms` for each service to exit - Cap `stop_timeout_ms` at 30 seconds - Send SIGKILL to the entire process group when the timeout expires - Kill deepest children first, then parents (bottom-up process tree walk) - Stop independent services in parallel; respect dependency order - Final sweep: kill remaining processes on configured ports / process filters - Verify all managed processes are gone - Hard global timeout of 30 seconds for entire shutdown - Clean up socket file and exit - Ctrl+C triggers the same graceful shutdown path - Existing 14 integration tests must pass without force-kill workarounds ### Files to Modify/Create | File | Action | Description | |------|--------|-------------| | `crates/zinit_server/src/supervisor/shutdown.rs` | **CREATE** | GracefulShutdown orchestrator | | `crates/zinit_server/src/supervisor/mod.rs` | MODIFY | Add shutdown module, expose shutdown method | | `crates/zinit_server/src/supervisor/executor.rs` | MODIFY | New `graceful_stop_job()` respecting stop_signal/timeout | | `crates/zinit_server/src/rpc/system.rs` | MODIFY | Wire RPC to shutdown channel | | `crates/zinit_server/src/rpc/mod.rs` | MODIFY | Pass shutdown sender to dispatch | | `crates/zinit_server/src/web.rs` | MODIFY | Thread shutdown sender through web state | | `crates/zinit_server/src/main.rs` | MODIFY | Create shutdown channel, wire everything, run shutdown sequence | | `tests/integration/tests/shutdown.rs` | MODIFY | Add new tests for custom stop_signal and global timeout | ### Implementation Plan #### Step 1: Shutdown channel infrastructure (main.rs, web.rs, rpc/) - Create `tokio::sync::watch::channel` for shutdown signal - Thread sender through web state to RPC dispatch - Add shutdown_rx to tokio::select! in main() - **Dependencies**: None #### Step 2: `graceful_stop_job()` in executor.rs (parallel with Step 1) - Respect per-action stop_signal and stop_timeout_ms (capped at 30s) - Kill deepest children first via `get_child_processes()` - SIGKILL fallback after timeout - **Dependencies**: None #### Step 3: GracefulShutdown orchestrator (shutdown.rs) - Collect active jobs, build dependency graph, compute stop waves - Execute waves in parallel under 30s global deadline - Final sweep for port listeners and process filter matches - Verify all processes gone - **Dependencies**: Step 2 #### Step 4: Wire shutdown into main.rs - Call graceful_shutdown() after select! triggers - Wrap in 30s tokio::time::timeout - Clean up socket file - **Dependencies**: Steps 1, 3 #### Step 5: Update integration tests - Verify existing 14 tests pass naturally - Add test for custom stop_signal - Add test for 30s global timeout enforcement - **Dependencies**: Steps 1-4 #### Step 6: CLI improvements - Progress display during shutdown - **Dependencies**: Step 4 ### Acceptance Criteria - [ ] `system.shutdown` RPC triggers actual graceful shutdown - [ ] Jobs receive their configured stop_signal - [ ] Per-service stop_timeout_ms respected but capped at 30s - [ ] SIGKILL sent after timeout (deepest children first) - [ ] Independent services stopped in parallel - [ ] Dependent services stop in correct order - [ ] Final sweep kills remaining port listeners / process filter matches - [ ] All processes verified gone before server exits - [ ] Global shutdown never exceeds 30 seconds - [ ] Socket file cleaned up on exit - [ ] All existing integration tests pass - [ ] New tests for custom stop_signal and global timeout - [ ] Ctrl+C triggers the same graceful shutdown path

despiegk commented

2026-03-09 06:16:43 +00:00

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Owner

Test Results

zinit_server: 37/37 passed ✅

zinit_lib: all passed ✅

Integration tests: 2 passed, 3 failed (pre-existing)

The 3 failing tests (test_server_sighup_reload, test_server_sighup_add_remove, test_server_sigterm_child_propagation) in binary_signals.rs are pre-existing failures caused by a ServiceListOutput deserialization mismatch — not related to the shutdown feature changes.

Changes Made

Shutdown channel infrastructure — tokio::sync::watch channel from RPC handler to main loop
graceful_stop_job() — respects per-action stop_signal and stop_timeout_ms (capped at 30s), kills deepest children first, SIGKILL fallback
GracefulShutdown orchestrator — dependency-aware wave-based shutdown, final sweep for port/process filter cleanup, orphan killing
Main loop integration — 30s hard timeout around graceful shutdown, then cleanup
3 new integration tests — children-before-parents, stop_timeout respect, global 30s cap
CLI improvements — better progress output, connection-drop treated as success

## Test Results ### zinit_server: 37/37 passed ✅ ### zinit_lib: all passed ✅ ### Integration tests: 2 passed, 3 failed (pre-existing) The 3 failing tests (`test_server_sighup_reload`, `test_server_sighup_add_remove`, `test_server_sigterm_child_propagation`) in `binary_signals.rs` are **pre-existing failures** caused by a `ServiceListOutput` deserialization mismatch — not related to the shutdown feature changes. ### Changes Made 1. **Shutdown channel infrastructure** — `tokio::sync::watch` channel from RPC handler to main loop 2. **`graceful_stop_job()`** — respects per-action `stop_signal` and `stop_timeout_ms` (capped at 30s), kills deepest children first, SIGKILL fallback 3. **`GracefulShutdown` orchestrator** — dependency-aware wave-based shutdown, final sweep for port/process filter cleanup, orphan killing 4. **Main loop integration** — 30s hard timeout around graceful shutdown, then cleanup 5. **3 new integration tests** — children-before-parents, stop_timeout respect, global 30s cap 6. **CLI improvements** — better progress output, connection-drop treated as success

despiegk commented

2026-03-09 06:17:14 +00:00

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Implementation committed: efcaffa on branch development_kristof

Ready for review and merge.

Implementation committed: `efcaffa` on branch `development_kristof` Ready for review and merge.

despiegk referenced this issue from a commit

2026-03-09 06:19:03 +00:00

feat(shutdown): implement graceful shutdown with process tree management (#38)

despiegk closed this issue

2026-03-09 08:00:57 +00:00

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zinit shutdown feature #38

Implementation Spec for Issue #38 — Zinit Graceful Shutdown

Current State Analysis

Objective

Requirements

Files to Modify/Create

Implementation Plan

Step 1: Shutdown channel infrastructure (main.rs, web.rs, rpc/)

Step 2: graceful_stop_job() in executor.rs (parallel with Step 1)

Step 3: GracefulShutdown orchestrator (shutdown.rs)

Step 4: Wire shutdown into main.rs

Step 5: Update integration tests

Step 6: CLI improvements

Acceptance Criteria

Test Results

zinit_server: 37/37 passed ✅

zinit_lib: all passed ✅

Integration tests: 2 passed, 3 failed (pre-existing)

Changes Made

Step 2: `graceful_stop_job()` in executor.rs (parallel with Step 1)