refactor: extract startup shutdown lifecycle boundary (#3634)

docs/architecture/migration-progress.md

@@ -5,15 +5,15 @@ Status values: `[ ]` not started, `[~]` in progress, `[x]` complete, `[!]` block
 ## Current Context
 
 - Issue: [`rustfs/backlog#660`](https://github.com/rustfs/backlog/issues/660)
-- Branch: `overtrue/arch-optional-runtime-start-boundary`
-- Baseline: latest `origin/main`
-  (`74fcfddd7fd98d69358e02908617261d962725d1`).
+- Branch: `overtrue/arch-startup-shutdown-lifecycle-boundary`
+- Baseline: `origin/main`
+  (`eec1792c7bd1bf650dbb3c46d7873db6fed6150f`).
 - PR type for this branch: `pure-move`
 - Runtime behavior changes: none.
-- Rust code changes: move optional protocol startup and shutdown ownership from
-  `startup_services` into the optional runtime boundary.
+- Rust code changes: move startup shutdown sequencing from `startup_services`
+  into a dedicated shutdown lifecycle boundary.
 - CI/script changes: none.
-- Docs changes: record the R-022 optional runtime startup boundary slice.
+- Docs changes: record the R-023 startup shutdown lifecycle boundary slice.
 
 ## Phase 0 Tasks
 
@@ -2046,6 +2046,23 @@ Status values: `[ ]` not started, `[~]` in progress, `[x]` complete, `[!]` block
     risk scan, branch freshness check, pre-commit quality gate, and
     three-expert review.
 
+- [x] `R-023` Extract startup shutdown lifecycle boundary.
+  - Do: add `startup_shutdown` and move runtime token cancellation, service
+    state transitions, background shutdown, notifier/audit/profiling shutdown,
+    HTTP shutdown, and optional runtime wait sequencing out of
+    `startup_services`.
+  - Acceptance: shutdown order stays runtime token cancellation, `Stopping`
+    state, scanner/AHM shutdown, optional runtime shutdown planning,
+    notifier/audit/profiling shutdown, S3 and console HTTP shutdown, optional
+    runtime waits, then `Stopped` state.
+  - Must preserve: service state transitions, readiness state behavior,
+    scanner/heal enable flag handling, notifier/audit/profiling shutdown logs,
+    HTTP shutdown ordering, optional protocol shutdown ordering, and fatal
+    boundaries.
+  - Verification: focused shutdown/service/optional runtime tests, RustFS lib
+    check, migration/layer guards, formatting, diff hygiene, Rust risk scan,
+    branch freshness check, pre-commit quality gate, and three-expert review.
+
 ## Next PRs
 
 1. `pure-move`: continue larger lifecycle hook slices for optional runtime
@@ -2057,9 +2074,9 @@ Status values: `[ ]` not started, `[~]` in progress, `[x]` complete, `[!]` block
 
 | Expert | Status | Notes |
 |---|---|---|
-| Quality/architecture | passed | R-022 keeps protocol implementation details in `startup_protocols` and moves optional runtime startup ownership into `startup_optional_runtimes`. |
-| Migration preservation | passed | KMS-before-protocol ordering, protocol fatal boundary, protocol startup order, shutdown order, readiness, and HTTP shutdown behavior remain unchanged. |
-| Testing/verification | passed | Focused optional runtime, protocol, and startup service tests plus final checks are tracked below before push. |
+| Quality/architecture | passed | R-023 keeps startup orchestration in `startup_services` and moves shutdown sequencing into `startup_shutdown`. |
+| Migration preservation | passed | Runtime token cancellation, background shutdown, optional runtime planning, notifier/audit/profiling shutdown, HTTP shutdown, optional runtime waits, and service state transitions remain ordered. |
+| Testing/verification | passed | Focused shutdown, optional runtime, and startup service tests plus final checks are tracked below before push. |
 
 ## Verification Notes
 
@@ -2114,6 +2131,20 @@ Passed before push:
   - `make pre-commit`: passed.
   - Three-expert review: passed.
 
+- Issue #660 R-023 current slice:
+  - `cargo test -p rustfs --lib startup_shutdown -- --nocapture`: passed.
+  - `cargo test -p rustfs --lib startup_services -- --nocapture`: passed.
+  - `cargo test -p rustfs --lib startup_optional_runtimes -- --nocapture`:
+    passed.
+  - `cargo check -p rustfs --lib`: passed.
+  - `./scripts/check_architecture_migration_rules.sh`: passed.
+  - `./scripts/check_layer_dependencies.sh`: passed.
+  - `cargo fmt --all --check`: passed.
+  - `git diff --check`: passed.
+  - Rust risk scan on changed Rust files: passed.
+  - `make pre-commit`: passed.
+  - Three-expert review: passed.
+
 - Issue #660 R-020 current slice:
   - `cargo test -p rustfs --lib startup_profiling -- --nocapture`: passed.
   - `cargo check -p rustfs --lib`: passed.

docs/architecture/runtime-lifecycle.md

@@ -31,6 +31,14 @@ Disallowed responsibilities:
 - Hide globals behind a service-locator API.
 - Change startup side effects while moving code.
 
+## Shutdown Lifecycle Boundary
+
+`startup_shutdown` owns the main shutdown sequence after the process receives a
+shutdown signal. Startup modules may pass handles into this boundary, but they
+must not reorder runtime-token cancellation, background service shutdown,
+optional runtime shutdown planning, notifier/audit/profiling shutdown, HTTP
+shutdown, optional runtime waits, or final service-state publication.
+
 ## Optional Runtime Boundary
 
 `startup_optional_runtimes` owns startup and shutdown handoff for optional

docs/architecture/startup-timeline.md

@@ -69,11 +69,11 @@ new startup semantics.
 
 | Step | Source | Current action | Side effects | Fatal boundary | Ready stage |
 |---|---|---|---|---|---|
-| `STOP-001` | `rustfs/src/startup_services.rs` | Cancel runtime token and move service state to `Stopping`. | Notifies cancellation-aware background tasks. | Non-fatal. | Service state moves to `Stopping`; readiness stages are not cleared here |
-| `STOP-002` | `rustfs/src/startup_services.rs` | Stop scanner/background services and AHM services according to enable flags. | Calls ECStore background shutdown and heal/scanner shutdown helpers. | Non-fatal in this path. | No readiness-stage change |
+| `STOP-001` | `rustfs/src/startup_shutdown.rs` | Cancel runtime token and move service state to `Stopping`. | Notifies cancellation-aware background tasks. | Non-fatal. | Service state moves to `Stopping`; readiness stages are not cleared here |
+| `STOP-002` | `rustfs/src/startup_shutdown.rs` | Stop scanner/background services and AHM services according to enable flags. | Calls ECStore background shutdown and heal/scanner shutdown helpers. | Non-fatal in this path. | No readiness-stage change |
 | `STOP-003` | `rustfs/src/startup_optional_runtimes.rs` | Plan optional runtime shutdown and log stopping state for FTP/FTPS/WebDAV/SFTP protocol servers. | Collects protocol shutdown handles. | Non-fatal in this path. | No readiness-stage change |
-| `STOP-004` | `rustfs/src/startup_services.rs` and `rustfs/src/startup_profiling.rs` | Stop event notifier, audit system, and profiling tasks. | Stops notifier and profiling tasks; audit stop failures are logged. | Non-fatal in this path. | No readiness-stage change |
-| `STOP-005` | `rustfs/src/startup_services.rs` and `rustfs/src/startup_optional_runtimes.rs` | Stop S3 and console HTTP servers, signal and wait for optional protocol shutdowns, then mark service state `Stopped`. | HTTP shutdown happens after notifier/audit/profiling shutdown in current order. | Join failures are logged by shutdown handles; this path does not return errors. | Service state moves to `Stopped`; readiness stages are not cleared here |
+| `STOP-004` | `rustfs/src/startup_shutdown.rs` and `rustfs/src/startup_profiling.rs` | Stop event notifier, audit system, and profiling tasks. | Stops notifier and profiling tasks; audit stop failures are logged. | Non-fatal in this path. | No readiness-stage change |
+| `STOP-005` | `rustfs/src/startup_shutdown.rs` and `rustfs/src/startup_optional_runtimes.rs` | Stop S3 and console HTTP servers, signal and wait for optional protocol shutdowns, then mark service state `Stopped`. | HTTP shutdown happens after notifier/audit/profiling shutdown in current order. | Join failures are logged by shutdown handles; this path does not return errors. | Service state moves to `Stopped`; readiness stages are not cleared here |
 
 ## Migration Rules
 

rustfs/src/lib.rs

@@ -78,6 +78,7 @@ pub mod startup_protocols;
 pub mod startup_runtime;
 pub mod startup_server;
 pub mod startup_services;
+pub mod startup_shutdown;
 pub mod startup_storage;
 pub mod storage;
 pub(crate) mod storage_compat;

rustfs/src/startup_services.rs

@@ -14,7 +14,7 @@
 
 use crate::storage_compat::{
     ECStore, EndpointServerPools, get_global_replication_pool, init_bucket_metadata_sys, new_global_notification_sys,
-    shutdown_background_services, try_migrate_bucket_metadata, try_migrate_iam_config,
+    try_migrate_bucket_metadata, try_migrate_iam_config,
 };
 use crate::{
     config::Config,
@@ -22,21 +22,14 @@ use crate::{
         add_bucket_notification_configuration, init_auto_tuner, init_buffer_profile_system, init_kms_system, init_update_check,
         print_server_info,
     },
-    server::{
-        ServiceState, ServiceStateManager, ShutdownHandle, ShutdownSignal, init_event_notifier, shutdown_event_notifier,
-        start_audit_system, stop_audit_system, wait_for_shutdown,
-    },
+    server::{ServiceStateManager, ShutdownHandle, init_event_notifier, start_audit_system, wait_for_shutdown},
     startup_iam::{IamBootstrapDisposition, bootstrap_or_defer_iam_init, publish_ready_for_iam_bootstrap},
-    startup_optional_runtimes::{
-        OptionalRuntimeServices, init_optional_runtime_services, prepare_optional_runtime_shutdowns,
-        shutdown_optional_runtime_services,
-    },
+    startup_optional_runtimes::{OptionalRuntimeServices, init_optional_runtime_services},
+    startup_shutdown::run_startup_shutdown_sequence,
 };
 use rustfs_audit::AuditResult;
 use rustfs_common::GlobalReadiness;
-use rustfs_heal::{
-    create_ahm_services_cancel_token, heal::storage::ECStoreHealStorage, init_heal_manager, shutdown_ahm_services,
-};
+use rustfs_heal::{create_ahm_services_cancel_token, heal::storage::ECStoreHealStorage, init_heal_manager};
 use rustfs_iam::init_oidc_sys;
 use rustfs_obs::init_metrics_runtime;
 use rustfs_scanner::init_data_scanner;
@@ -65,10 +58,6 @@ const EVENT_OIDC_INITIALIZATION_FAILED: &str = "oidc_initialization_failed";
 const EVENT_NOTIFICATION_SYSTEM_INITIALIZATION_FAILED: &str = "notification_system_initialization_failed";
 const EVENT_BACKGROUND_SERVICES_CONFIGURED: &str = "background_services_configured";
 const EVENT_SERVER_READY: &str = "server_ready";
-const EVENT_SHUTDOWN_SIGNAL_RECEIVED: &str = "shutdown_signal_received";
-const EVENT_BACKGROUND_SERVICE_SHUTDOWN: &str = "background_service_shutdown";
-const EVENT_EVENT_NOTIFIER_SHUTDOWN: &str = "event_notifier_shutdown";
-const EVENT_PROFILING_SHUTDOWN: &str = "profiling_shutdown";
 const EVENT_SERVER_SHUTDOWN_STATE: &str = "server_shutdown_state";
 
 pub struct StartupServiceRuntime {
@@ -154,7 +143,7 @@ pub async fn run_startup_runtime_lifecycle(lifecycle: StartupRuntimeLifecycle) -
     }
 
     let shutdown_signal = wait_for_shutdown().await;
-    handle_shutdown(
+    run_startup_shutdown_sequence(
         &state_manager,
         shutdown_signal,
         s3_shutdown_tx,
@@ -356,165 +345,6 @@ async fn init_observability_runtime(ctx: CancellationToken) {
     }
 }
 
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
-enum BackgroundShutdownStep {
-    DataScanner,
-    Ahm,
-}
-
-fn background_shutdown_steps(enable_scanner: bool, enable_heal: bool) -> Vec<BackgroundShutdownStep> {
-    let mut steps = Vec::with_capacity(2);
-    if enable_scanner {
-        steps.push(BackgroundShutdownStep::DataScanner);
-    }
-    if enable_heal || enable_scanner {
-        steps.push(BackgroundShutdownStep::Ahm);
-    }
-    steps
-}
-
-async fn handle_shutdown(
-    state_manager: &ServiceStateManager,
-    shutdown_signal: ShutdownSignal,
-    s3_shutdown_handle: Option<ShutdownHandle>,
-    console_shutdown_handle: Option<ShutdownHandle>,
-    optional_runtimes: OptionalRuntimeServices,
-    ctx: CancellationToken,
-) {
-    ctx.cancel();
-
-    info!(
-        target: "rustfs::main::handle_shutdown",
-        event = EVENT_SHUTDOWN_SIGNAL_RECEIVED,
-        component = LOG_COMPONENT_MAIN,
-        subsystem = LOG_SUBSYSTEM_STARTUP,
-        signal = shutdown_signal.log_label(),
-        "Shutdown signal received"
-    );
-    state_manager.update(ServiceState::Stopping);
-
-    let enable_scanner = get_env_bool_with_aliases(ENV_SCANNER_ENABLED, &[ENV_SCANNER_ENABLED_DEPRECATED], true);
-    let enable_heal = get_env_bool_with_aliases(ENV_HEAL_ENABLED, &[ENV_HEAL_ENABLED_DEPRECATED], true);
-
-    let background_steps = background_shutdown_steps(enable_scanner, enable_heal);
-    for step in &background_steps {
-        match step {
-            BackgroundShutdownStep::DataScanner => {
-                info!(
-                    target: "rustfs::main::handle_shutdown",
-                    event = EVENT_BACKGROUND_SERVICE_SHUTDOWN,
-                    component = LOG_COMPONENT_MAIN,
-                    subsystem = LOG_SUBSYSTEM_STARTUP,
-                    service = "data_scanner",
-                    state = "stopping",
-                    "Background service shutdown started"
-                );
-                shutdown_background_services();
-            }
-            BackgroundShutdownStep::Ahm => {
-                info!(
-                    target: "rustfs::main::handle_shutdown",
-                    event = EVENT_BACKGROUND_SERVICE_SHUTDOWN,
-                    component = LOG_COMPONENT_MAIN,
-                    subsystem = LOG_SUBSYSTEM_STARTUP,
-                    service = "ahm",
-                    state = "stopping",
-                    "Background service shutdown started"
-                );
-                shutdown_ahm_services();
-            }
-        }
-    }
-
-    if background_steps.is_empty() {
-        info!(
-            target: "rustfs::main::handle_shutdown",
-            event = EVENT_BACKGROUND_SERVICE_SHUTDOWN,
-            component = LOG_COMPONENT_MAIN,
-            subsystem = LOG_SUBSYSTEM_STARTUP,
-            service = "ahm",
-            state = "skipped",
-            reason = "disabled",
-            "Background service shutdown skipped"
-        );
-    }
-
-    let optional_runtime_shutdowns = prepare_optional_runtime_shutdowns(optional_runtimes);
-
-    info!(
-        target: "rustfs::main::handle_shutdown",
-        event = EVENT_EVENT_NOTIFIER_SHUTDOWN,
-        component = LOG_COMPONENT_MAIN,
-        subsystem = LOG_SUBSYSTEM_STARTUP,
-        state = "stopping",
-        "Event notifier shutdown started"
-    );
-    shutdown_event_notifier().await;
-
-    info!(
-        target: "rustfs::main::handle_shutdown",
-        event = EVENT_AUDIT_SYSTEM_STATE,
-        component = LOG_COMPONENT_MAIN,
-        subsystem = LOG_SUBSYSTEM_STARTUP,
-        state = "stopping",
-        "Audit runtime stopping"
-    );
-    match stop_audit_system().await {
-        Ok(_) => info!(
-            target: "rustfs::main::handle_shutdown",
-            event = EVENT_AUDIT_SYSTEM_STATE,
-            component = LOG_COMPONENT_MAIN,
-            subsystem = LOG_SUBSYSTEM_STARTUP,
-            state = "stopped",
-            "Audit runtime stopped"
-        ),
-        Err(e) => error!(
-            target: "rustfs::main::handle_shutdown",
-            event = EVENT_AUDIT_SYSTEM_STATE,
-            component = LOG_COMPONENT_MAIN,
-            subsystem = LOG_SUBSYSTEM_STARTUP,
-            state = "stop_failed",
-            error = %e,
-            "Audit runtime failed to stop"
-        ),
-    }
-
-    info!(
-        target: "rustfs::main::handle_shutdown",
-        event = EVENT_PROFILING_SHUTDOWN,
-        component = LOG_COMPONENT_MAIN,
-        subsystem = LOG_SUBSYSTEM_STARTUP,
-        state = "stopping",
-        "Profiling shutdown started"
-    );
-    crate::startup_profiling::shutdown_profiling_runtime();
-
-    info!(
-        target: "rustfs::main::handle_shutdown",
-        event = EVENT_SERVER_SHUTDOWN_STATE,
-        component = LOG_COMPONENT_MAIN,
-        subsystem = LOG_SUBSYSTEM_STARTUP,
-        state = "stopping",
-        "RustFS server stopping"
-    );
-    if let Some(s3_shutdown_handle) = s3_shutdown_handle {
-        s3_shutdown_handle.shutdown().await;
-    }
-    if let Some(console_shutdown_handle) = console_shutdown_handle {
-        console_shutdown_handle.shutdown().await;
-    }
-    shutdown_optional_runtime_services(optional_runtime_shutdowns).await;
-    state_manager.update(ServiceState::Stopped);
-    info!(
-        target: "rustfs::main::handle_shutdown",
-        event = EVENT_SERVER_SHUTDOWN_STATE,
-        component = LOG_COMPONENT_MAIN,
-        subsystem = LOG_SUBSYSTEM_STARTUP,
-        state = "stopped",
-        "RustFS server stopped"
-    );
-}
-
 pub async fn init_event_notifier_and_audit() -> AuditResult<()> {
     init_event_notifier_and_audit_with(init_event_notifier, start_audit_system).await
 }
@@ -547,9 +377,7 @@ where
 
 #[cfg(test)]
 mod tests {
-    use super::{
-        BackgroundShutdownStep, background_shutdown_steps, init_event_notifier_and_audit_with, init_notification_system_with,
-    };
+    use super::{init_event_notifier_and_audit_with, init_notification_system_with};
     use rustfs_audit::AuditError;
     use std::sync::{Arc, Mutex};
 
@@ -602,18 +430,4 @@ mod tests {
 
         assert!(result.is_err());
     }
-
-    #[test]
-    fn background_shutdown_plan_keeps_scanner_before_ahm() {
-        assert_eq!(
-            background_shutdown_steps(true, true),
-            vec![BackgroundShutdownStep::DataScanner, BackgroundShutdownStep::Ahm]
-        );
-        assert_eq!(
-            background_shutdown_steps(true, false),
-            vec![BackgroundShutdownStep::DataScanner, BackgroundShutdownStep::Ahm]
-        );
-        assert_eq!(background_shutdown_steps(false, true), vec![BackgroundShutdownStep::Ahm]);
-        assert!(background_shutdown_steps(false, false).is_empty());
-    }
 }

rustfs/src/startup_shutdown.rs

@@ -0,0 +1,216 @@
+// Copyright 2024 RustFS Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use crate::{
+    server::{ServiceState, ServiceStateManager, ShutdownHandle, ShutdownSignal, shutdown_event_notifier, stop_audit_system},
+    startup_optional_runtimes::{
+        OptionalRuntimeServices, prepare_optional_runtime_shutdowns, shutdown_optional_runtime_services,
+    },
+    storage_compat::shutdown_background_services,
+};
+use rustfs_heal::shutdown_ahm_services;
+use rustfs_utils::get_env_bool_with_aliases;
+use tokio_util::sync::CancellationToken;
+use tracing::{error, info};
+
+const ENV_SCANNER_ENABLED: &str = "RUSTFS_SCANNER_ENABLED";
+const ENV_SCANNER_ENABLED_DEPRECATED: &str = "RUSTFS_ENABLE_SCANNER";
+const ENV_HEAL_ENABLED: &str = "RUSTFS_HEAL_ENABLED";
+const ENV_HEAL_ENABLED_DEPRECATED: &str = "RUSTFS_ENABLE_HEAL";
+const LOG_COMPONENT_MAIN: &str = "main";
+const LOG_SUBSYSTEM_STARTUP: &str = "startup";
+const EVENT_AUDIT_SYSTEM_STATE: &str = "audit_system_state";
+const EVENT_SHUTDOWN_SIGNAL_RECEIVED: &str = "shutdown_signal_received";
+const EVENT_BACKGROUND_SERVICE_SHUTDOWN: &str = "background_service_shutdown";
+const EVENT_EVENT_NOTIFIER_SHUTDOWN: &str = "event_notifier_shutdown";
+const EVENT_PROFILING_SHUTDOWN: &str = "profiling_shutdown";
+const EVENT_SERVER_SHUTDOWN_STATE: &str = "server_shutdown_state";
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+enum BackgroundShutdownStep {
+    DataScanner,
+    Ahm,
+}
+
+fn background_shutdown_steps(enable_scanner: bool, enable_heal: bool) -> Vec<BackgroundShutdownStep> {
+    let mut steps = Vec::with_capacity(2);
+    if enable_scanner {
+        steps.push(BackgroundShutdownStep::DataScanner);
+    }
+    if enable_heal || enable_scanner {
+        steps.push(BackgroundShutdownStep::Ahm);
+    }
+    steps
+}
+
+pub async fn run_startup_shutdown_sequence(
+    state_manager: &ServiceStateManager,
+    shutdown_signal: ShutdownSignal,
+    s3_shutdown_handle: Option<ShutdownHandle>,
+    console_shutdown_handle: Option<ShutdownHandle>,
+    optional_runtimes: OptionalRuntimeServices,
+    ctx: CancellationToken,
+) {
+    ctx.cancel();
+
+    info!(
+        target: "rustfs::main::handle_shutdown",
+        event = EVENT_SHUTDOWN_SIGNAL_RECEIVED,
+        component = LOG_COMPONENT_MAIN,
+        subsystem = LOG_SUBSYSTEM_STARTUP,
+        signal = shutdown_signal.log_label(),
+        "Shutdown signal received"
+    );
+    state_manager.update(ServiceState::Stopping);
+
+    let enable_scanner = get_env_bool_with_aliases(ENV_SCANNER_ENABLED, &[ENV_SCANNER_ENABLED_DEPRECATED], true);
+    let enable_heal = get_env_bool_with_aliases(ENV_HEAL_ENABLED, &[ENV_HEAL_ENABLED_DEPRECATED], true);
+
+    let background_steps = background_shutdown_steps(enable_scanner, enable_heal);
+    for step in &background_steps {
+        match step {
+            BackgroundShutdownStep::DataScanner => {
+                info!(
+                    target: "rustfs::main::handle_shutdown",
+                    event = EVENT_BACKGROUND_SERVICE_SHUTDOWN,
+                    component = LOG_COMPONENT_MAIN,
+                    subsystem = LOG_SUBSYSTEM_STARTUP,
+                    service = "data_scanner",
+                    state = "stopping",
+                    "Background service shutdown started"
+                );
+                shutdown_background_services();
+            }
+            BackgroundShutdownStep::Ahm => {
+                info!(
+                    target: "rustfs::main::handle_shutdown",
+                    event = EVENT_BACKGROUND_SERVICE_SHUTDOWN,
+                    component = LOG_COMPONENT_MAIN,
+                    subsystem = LOG_SUBSYSTEM_STARTUP,
+                    service = "ahm",
+                    state = "stopping",
+                    "Background service shutdown started"
+                );
+                shutdown_ahm_services();
+            }
+        }
+    }
+
+    if background_steps.is_empty() {
+        info!(
+            target: "rustfs::main::handle_shutdown",
+            event = EVENT_BACKGROUND_SERVICE_SHUTDOWN,
+            component = LOG_COMPONENT_MAIN,
+            subsystem = LOG_SUBSYSTEM_STARTUP,
+            service = "ahm",
+            state = "skipped",
+            reason = "disabled",
+            "Background service shutdown skipped"
+        );
+    }
+
+    let optional_runtime_shutdowns = prepare_optional_runtime_shutdowns(optional_runtimes);
+
+    info!(
+        target: "rustfs::main::handle_shutdown",
+        event = EVENT_EVENT_NOTIFIER_SHUTDOWN,
+        component = LOG_COMPONENT_MAIN,
+        subsystem = LOG_SUBSYSTEM_STARTUP,
+        state = "stopping",
+        "Event notifier shutdown started"
+    );
+    shutdown_event_notifier().await;
+
+    info!(
+        target: "rustfs::main::handle_shutdown",
+        event = EVENT_AUDIT_SYSTEM_STATE,
+        component = LOG_COMPONENT_MAIN,
+        subsystem = LOG_SUBSYSTEM_STARTUP,
+        state = "stopping",
+        "Audit runtime stopping"
+    );
+    match stop_audit_system().await {
+        Ok(_) => info!(
+            target: "rustfs::main::handle_shutdown",
+            event = EVENT_AUDIT_SYSTEM_STATE,
+            component = LOG_COMPONENT_MAIN,
+            subsystem = LOG_SUBSYSTEM_STARTUP,
+            state = "stopped",
+            "Audit runtime stopped"
+        ),
+        Err(e) => error!(
+            target: "rustfs::main::handle_shutdown",
+            event = EVENT_AUDIT_SYSTEM_STATE,
+            component = LOG_COMPONENT_MAIN,
+            subsystem = LOG_SUBSYSTEM_STARTUP,
+            state = "stop_failed",
+            error = %e,
+            "Audit runtime failed to stop"
+        ),
+    }
+
+    info!(
+        target: "rustfs::main::handle_shutdown",
+        event = EVENT_PROFILING_SHUTDOWN,
+        component = LOG_COMPONENT_MAIN,
+        subsystem = LOG_SUBSYSTEM_STARTUP,
+        state = "stopping",
+        "Profiling shutdown started"
+    );
+    crate::startup_profiling::shutdown_profiling_runtime();
+
+    info!(
+        target: "rustfs::main::handle_shutdown",
+        event = EVENT_SERVER_SHUTDOWN_STATE,
+        component = LOG_COMPONENT_MAIN,
+        subsystem = LOG_SUBSYSTEM_STARTUP,
+        state = "stopping",
+        "RustFS server stopping"
+    );
+    if let Some(s3_shutdown_handle) = s3_shutdown_handle {
+        s3_shutdown_handle.shutdown().await;
+    }
+    if let Some(console_shutdown_handle) = console_shutdown_handle {
+        console_shutdown_handle.shutdown().await;
+    }
+    shutdown_optional_runtime_services(optional_runtime_shutdowns).await;
+    state_manager.update(ServiceState::Stopped);
+    info!(
+        target: "rustfs::main::handle_shutdown",
+        event = EVENT_SERVER_SHUTDOWN_STATE,
+        component = LOG_COMPONENT_MAIN,
+        subsystem = LOG_SUBSYSTEM_STARTUP,
+        state = "stopped",
+        "RustFS server stopped"
+    );
+}
+
+#[cfg(test)]
+mod tests {
+    use super::{BackgroundShutdownStep, background_shutdown_steps};
+
+    #[test]
+    fn background_shutdown_plan_keeps_scanner_before_ahm() {
+        assert_eq!(
+            background_shutdown_steps(true, true),
+            vec![BackgroundShutdownStep::DataScanner, BackgroundShutdownStep::Ahm]
+        );
+        assert_eq!(
+            background_shutdown_steps(true, false),
+            vec![BackgroundShutdownStep::DataScanner, BackgroundShutdownStep::Ahm]
+        );
+        assert_eq!(background_shutdown_steps(false, true), vec![BackgroundShutdownStep::Ahm]);
+        assert!(background_shutdown_steps(false, false).is_empty());
+    }
+}