Refactor logging to use slog package across the application

- Replaced standard log package with log/slog in httpclient, nginx manager, sync service, updater, and other components for structured logging.
- Introduced environment variable `LOG_LEVEL` to control logging levels (debug, info, warn, error).
- Updated documentation to reflect changes in logging configuration and requirements.
- Added a new logging setup function in the ats_agent internal package to initialize the slog logger.

atsf_agent/cmd/agent/main.go

@@ -3,7 +3,8 @@ package main
 import (
 	"context"
 	"flag"
-	"log"
+	"log/slog"
+	"os"
 	"os/signal"
 	"syscall"
 
@@ -11,6 +12,7 @@ import (
 	"atsflare-agent/internal/config"
 	"atsflare-agent/internal/heartbeat"
 	"atsflare-agent/internal/httpclient"
+	"atsflare-agent/internal/logging"
 	"atsflare-agent/internal/nginx"
 	"atsflare-agent/internal/state"
 	syncservice "atsflare-agent/internal/sync"
@@ -18,12 +20,15 @@ import (
 )
 
 func main() {
+	logging.Setup()
+
 	configPath := flag.String("config", "./agent.json", "agent config path")
 	flag.Parse()
 
 	cfg, err := config.Load(*configPath)
 	if err != nil {
-		log.Fatal(err)
+		slog.Error("load agent config failed", "error", err)
+		os.Exit(1)
 	}
 	cfg.NginxVersion = nginx.DetectVersion(
 		context.Background(),
@@ -38,7 +43,14 @@ func main() {
 			NginxCertDir:    cfg.OpenrestyCertDir,
 		},
 	)
-	log.Printf("agent config loaded: server=%s node=%s ip=%s heartbeat_interval=%s route_config=%s cert_dir=%s", cfg.ServerURL, cfg.NodeName, cfg.NodeIP, cfg.HeartbeatInterval, cfg.RouteConfigPath, cfg.CertDir)
+	slog.Info("agent config loaded",
+		"server", cfg.ServerURL,
+		"node", cfg.NodeName,
+		"ip", cfg.NodeIP,
+		"heartbeat_interval", cfg.HeartbeatInterval,
+		"route_config", cfg.RouteConfigPath,
+		"cert_dir", cfg.CertDir,
+	)
 
 	client := httpclient.New(cfg.ServerURL, cfg.InitialAuthToken(), cfg.RequestTimeout.Duration())
 	stateStore := state.NewStore(cfg.StatePath)
@@ -74,10 +86,11 @@ func main() {
 
 	ctx, stop := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
 	defer stop()
-	log.Printf("agent process started")
+	slog.Info("agent process started")
 
 	if err = runner.Run(ctx); err != nil && err != context.Canceled {
-		log.Fatal(err)
+		slog.Error("agent process exited with error", "error", err)
+		os.Exit(1)
 	}
-	log.Printf("agent process stopped")
+	slog.Info("agent process stopped")
 }

atsf_agent/go.mod

@@ -1,3 +1,3 @@
 module atsflare-agent
 
-go 1.18
+go 1.23.0

atsf_agent/internal/agent/runner.go

@@ -3,7 +3,7 @@ package agent
 import (
 	"context"
 	"errors"
-	"log"
+	"log/slog"
 	"strings"
 	"time"
 
@@ -59,29 +59,29 @@ func (r *Runner) Run(ctx context.Context) error {
 	if err != nil {
 		return err
 	}
-	log.Printf("agent runner started: node_id=%s node=%s ip=%s", nodeID, r.Config.NodeName, r.Config.NodeIP)
+	slog.Info("agent runner started", "node_id", nodeID, "node", r.Config.NodeName, "ip", r.Config.NodeIP)
 	if r.hasAgentToken() {
 		r.refreshOpenrestyHealth(ctx)
 		heartbeatResult, hbErr := r.HeartbeatService.Heartbeat(ctx, r.nodePayload(nodeID))
 		if hbErr != nil {
-			log.Printf("agent startup heartbeat failed: %v", hbErr)
+			slog.Error("agent startup heartbeat failed", "error", hbErr)
 		} else {
 			if heartbeatResult == nil {
 				heartbeatResult = &protocol.HeartbeatResult{}
 			}
-			log.Printf("agent startup heartbeat succeeded: node_id=%s", nodeID)
+			slog.Info("agent startup heartbeat succeeded", "node_id", nodeID)
 			r.applySettings(heartbeatResult.AgentSettings)
 			if err = r.SyncService.SyncOnStartup(ctx, heartbeatResult.ActiveConfig); err != nil {
 				r.recordSyncError(err)
-				log.Printf("agent startup sync failed: %v", err)
+				slog.Error("agent startup sync failed", "error", err)
 			} else {
-				log.Printf("agent startup sync completed")
+				slog.Info("agent startup sync completed")
 			}
 			r.tryRestartOpenresty(ctx)
 			r.tryAutoUpdate(ctx)
 		}
 	} else if err = r.tryRegister(ctx, &nodeID); err != nil {
-		log.Printf("agent initial discovery register failed: %v", err)
+		slog.Error("agent initial discovery register failed", "error", err)
 	}
 
 	heartbeatTicker := time.NewTicker(r.Config.HeartbeatInterval.Duration())
@@ -90,19 +90,19 @@ func (r *Runner) Run(ctx context.Context) error {
 	for {
 		select {
 		case <-ctx.Done():
-			log.Printf("agent runner shutting down: %v", ctx.Err())
+			slog.Info("agent runner shutting down", "error", ctx.Err())
 			return ctx.Err()
 		case <-heartbeatTicker.C:
 			if !r.hasAgentToken() {
 				if err = r.tryRegister(ctx, &nodeID); err != nil {
-					log.Printf("agent discovery register failed: %v", err)
+					slog.Error("agent discovery register failed", "error", err)
 				}
 				continue
 			}
 			r.refreshOpenrestyHealth(ctx)
 			heartbeatResult, hbErr := r.HeartbeatService.Heartbeat(ctx, r.nodePayload(nodeID))
 			if hbErr != nil {
-				log.Printf("agent heartbeat failed: %v", hbErr)
+				slog.Error("agent heartbeat failed", "error", hbErr)
 			} else {
 				if heartbeatResult == nil {
 					heartbeatResult = &protocol.HeartbeatResult{}
@@ -112,7 +112,7 @@ func (r *Runner) Run(ctx context.Context) error {
 				}
 				if err = r.SyncService.SyncOnce(ctx, heartbeatResult.ActiveConfig); err != nil {
 					r.recordSyncError(err)
-					log.Printf("agent sync failed: %v", err)
+					slog.Error("agent sync failed", "error", err)
 				}
 				r.tryRestartOpenresty(ctx)
 				r.tryAutoUpdate(ctx)
@@ -133,7 +133,7 @@ func (r *Runner) applySettings(settings *protocol.AgentSettings) bool {
 	if settings.HeartbeatInterval > 0 {
 		newInterval := config.MillisecondDuration(time.Duration(settings.HeartbeatInterval) * time.Millisecond)
 		if newInterval != r.Config.HeartbeatInterval {
-			log.Printf("agent heartbeat interval updated: %s -> %s", r.Config.HeartbeatInterval, newInterval)
+			slog.Info("agent heartbeat interval updated", "from", r.Config.HeartbeatInterval, "to", newInterval)
 			r.Config.HeartbeatInterval = newInterval
 			changed = true
 		}
@@ -155,13 +155,13 @@ func (r *Runner) tryRestartOpenresty(ctx context.Context) {
 	if r.RuntimeManager == nil {
 		return
 	}
-	log.Printf("agent openresty restart requested by server")
+	slog.Info("agent openresty restart requested by server")
 	if err := r.RuntimeManager.Restart(ctx); err != nil {
-		log.Printf("agent openresty restart failed: %v", err)
+		slog.Error("agent openresty restart failed", "error", err)
 		r.recordOpenrestyUnhealthy(err, false)
 		return
 	}
-	log.Printf("agent openresty restart succeeded")
+	slog.Info("agent openresty restart succeeded")
 	r.recordOpenrestyHealthy()
 }
 
@@ -182,7 +182,7 @@ func (r *Runner) tryAutoUpdate(ctx context.Context) {
 		TagName: r.updateTag,
 		Force:   force,
 	}); err != nil {
-		log.Printf("agent update check failed: %v", err)
+		slog.Error("agent update check failed", "error", err)
 	}
 	if force {
 		r.updateTag = ""
@@ -194,7 +194,7 @@ func (r *Runner) tryRegister(ctx context.Context, nodeID *string) error {
 	if strings.TrimSpace(r.Config.DiscoveryToken) == "" {
 		return errors.New("agent_token 为空且未配置 discovery_token")
 	}
-	log.Printf("agent discovery registration started")
+	slog.Info("agent discovery registration started")
 	response, err := r.HeartbeatService.Register(ctx, r.nodePayload(*nodeID))
 	if err != nil {
 		return err
@@ -217,11 +217,11 @@ func (r *Runner) tryRegister(ctx context.Context, nodeID *string) error {
 	}
 	r.HeartbeatService.SetToken(response.AgentToken)
 	*nodeID = response.NodeID
-	log.Printf("agent discovery registration succeeded: node_id=%s", response.NodeID)
+	slog.Info("agent discovery registration succeeded", "node_id", response.NodeID)
 	r.refreshOpenrestyHealth(ctx)
 	heartbeatResult, heartbeatErr := r.HeartbeatService.Heartbeat(ctx, r.nodePayload(*nodeID))
 	if heartbeatErr != nil {
-		log.Printf("agent post-register heartbeat failed: %v", heartbeatErr)
+		slog.Error("agent post-register heartbeat failed", "error", heartbeatErr)
 		return nil
 	}
 	if heartbeatResult == nil {
@@ -230,9 +230,9 @@ func (r *Runner) tryRegister(ctx context.Context, nodeID *string) error {
 	r.applySettings(heartbeatResult.AgentSettings)
 	if err = r.SyncService.SyncOnStartup(ctx, heartbeatResult.ActiveConfig); err != nil {
 		r.recordSyncError(err)
-		log.Printf("agent post-register startup sync failed: %v", err)
+		slog.Error("agent post-register startup sync failed", "error", err)
 	} else {
-		log.Printf("agent post-register startup sync completed")
+		slog.Info("agent post-register startup sync completed")
 	}
 	r.tryRestartOpenresty(ctx)
 	r.tryAutoUpdate(ctx)
@@ -245,13 +245,13 @@ func (r *Runner) recordSyncError(err error) {
 	}
 	snapshot, loadErr := r.StateStore.Load()
 	if loadErr != nil {
-		log.Printf("load state before recording sync error failed: %v", loadErr)
+		slog.Error("load state before recording sync error failed", "error", loadErr)
 		return
 	}
 	snapshot.LastError = err.Error()
-	log.Printf("recording sync error into state: %s", snapshot.LastError)
+	slog.Warn("recording sync error into state", "error", snapshot.LastError)
 	if saveErr := r.StateStore.Save(snapshot); saveErr != nil {
-		log.Printf("save state after sync error failed: %v", saveErr)
+		slog.Error("save state after sync error failed", "error", saveErr)
 	}
 }
 
@@ -272,7 +272,7 @@ func (r *Runner) recordOpenrestyHealthy() {
 	}
 	snapshot, err := r.StateStore.Load()
 	if err != nil {
-		log.Printf("load state before recording openresty health failed: %v", err)
+		slog.Error("load state before recording openresty health failed", "error", err)
 		return
 	}
 	if snapshot.OpenrestyStatus == protocol.OpenrestyStatusHealthy && strings.TrimSpace(snapshot.OpenrestyMessage) == "" {
@@ -281,7 +281,7 @@ func (r *Runner) recordOpenrestyHealthy() {
 	snapshot.OpenrestyStatus = protocol.OpenrestyStatusHealthy
 	snapshot.OpenrestyMessage = ""
 	if err = r.StateStore.Save(snapshot); err != nil {
-		log.Printf("save state after recording openresty health failed: %v", err)
+		slog.Error("save state after recording openresty health failed", "error", err)
 	}
 }
 
@@ -291,7 +291,7 @@ func (r *Runner) recordOpenrestyUnhealthy(err error, fallbackOnly bool) {
 	}
 	snapshot, loadErr := r.StateStore.Load()
 	if loadErr != nil {
-		log.Printf("load state before recording openresty error failed: %v", loadErr)
+		slog.Error("load state before recording openresty error failed", "error", loadErr)
 		return
 	}
 	message := strings.TrimSpace(err.Error())
@@ -300,7 +300,7 @@ func (r *Runner) recordOpenrestyUnhealthy(err error, fallbackOnly bool) {
 	}
 	snapshot.OpenrestyStatus = protocol.OpenrestyStatusUnhealthy
 	if saveErr := r.StateStore.Save(snapshot); saveErr != nil {
-		log.Printf("save state after recording openresty error failed: %v", saveErr)
+		slog.Error("save state after recording openresty error failed", "error", saveErr)
 	}
 }
 

atsf_agent/internal/httpclient/client.go

@@ -5,7 +5,7 @@ import (
 	"context"
 	"encoding/json"
 	"errors"
-	"log"
+	"log/slog"
 	"net/http"
 	"strings"
 	"time"
@@ -30,7 +30,7 @@ func New(baseURL string, token string, timeout time.Duration) *Client {
 }
 
 func (c *Client) RegisterNode(ctx context.Context, payload protocol.NodePayload) (*protocol.RegisterNodeResponse, error) {
-	log.Printf("http register node request: node_id=%s current_version=%s", payload.NodeID, payload.CurrentVersion)
+	slog.Info("http register node request", "node_id", payload.NodeID, "current_version", payload.CurrentVersion)
 	resp := protocol.APIResponse[protocol.RegisterNodeResponse]{}
 	if err := c.postJSON(ctx, "/api/agent/nodes/register", payload, &resp); err != nil {
 		return nil, err
@@ -38,7 +38,7 @@ func (c *Client) RegisterNode(ctx context.Context, payload protocol.NodePayload)
 	if !resp.Success {
 		return nil, errors.New(resp.Message)
 	}
-	log.Printf("http register node response: node_id=%s", resp.Data.NodeID)
+	slog.Info("http register node response", "node_id", resp.Data.NodeID)
 	return &resp.Data, nil
 }
 
@@ -64,18 +64,18 @@ func (c *Client) GetActiveConfig(ctx context.Context) (*protocol.ActiveConfigRes
 	if !resp.Success {
 		return nil, errors.New(resp.Message)
 	}
-	log.Printf("http get active config response: version=%s checksum=%s support_files=%d", resp.Data.Version, resp.Data.Checksum, len(resp.Data.SupportFiles))
+	slog.Info("http get active config response", "version", resp.Data.Version, "checksum", resp.Data.Checksum, "support_files", len(resp.Data.SupportFiles))
 	return &resp.Data, nil
 }
 
 func (c *Client) ReportApplyLog(ctx context.Context, payload protocol.ApplyLogPayload) error {
-	log.Printf("http report apply log request: node_id=%s version=%s result=%s", payload.NodeID, payload.Version, payload.Result)
+	slog.Info("http report apply log request", "node_id", payload.NodeID, "version", payload.Version, "result", payload.Result)
 	return c.postJSON(ctx, "/api/agent/apply-logs", payload, nil)
 }
 
 func (c *Client) SetToken(token string) {
 	c.token = strings.TrimSpace(token)
-	log.Printf("http client token updated")
+	slog.Info("http client token updated")
 }
 
 func (c *Client) getJSON(ctx context.Context, path string, target any) error {
@@ -104,28 +104,28 @@ func (c *Client) postJSON(ctx context.Context, path string, body any, target any
 func (c *Client) do(req *http.Request, target any) error {
 	res, err := c.httpClient.Do(req)
 	if err != nil {
-		log.Printf("http request failed: method=%s path=%s error=%v", req.Method, req.URL.Path, err)
+		slog.Error("http request failed", "method", req.Method, "path", req.URL.Path, "error", err)
 		return err
 	}
 	defer res.Body.Close()
 	if res.StatusCode != http.StatusOK {
-		log.Printf("http request returned non-200: method=%s path=%s status=%s", req.Method, req.URL.Path, res.Status)
+		slog.Warn("http request returned non-200", "method", req.Method, "path", req.URL.Path, "status", res.Status)
 		return errors.New(res.Status)
 	}
 	if target == nil {
 		var wrapper protocol.APIResponse[json.RawMessage]
 		if err = json.NewDecoder(res.Body).Decode(&wrapper); err != nil {
-			log.Printf("http response decode failed: method=%s path=%s error=%v", req.Method, req.URL.Path, err)
+			slog.Error("http response decode failed", "method", req.Method, "path", req.URL.Path, "error", err)
 			return err
 		}
 		if !wrapper.Success {
-			log.Printf("http api response failed: method=%s path=%s message=%s", req.Method, req.URL.Path, wrapper.Message)
+			slog.Warn("http api response failed", "method", req.Method, "path", req.URL.Path, "message", wrapper.Message)
 			return errors.New(wrapper.Message)
 		}
 		return nil
 	}
 	if err = json.NewDecoder(res.Body).Decode(target); err != nil {
-		log.Printf("http response decode failed: method=%s path=%s error=%v", req.Method, req.URL.Path, err)
+		slog.Error("http response decode failed", "method", req.Method, "path", req.URL.Path, "error", err)
 		return err
 	}
 	return nil

atsf_agent/internal/logging/logger.go

@@ -0,0 +1,27 @@
+package logging
+
+import (
+	"log/slog"
+	"os"
+	"strings"
+)
+
+func Setup() {
+	handler := slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{
+		Level: parseLevel(os.Getenv("LOG_LEVEL")),
+	})
+	slog.SetDefault(slog.New(handler))
+}
+
+func parseLevel(value string) slog.Level {
+	switch strings.ToLower(strings.TrimSpace(value)) {
+	case "debug":
+		return slog.LevelDebug
+	case "warn", "warning":
+		return slog.LevelWarn
+	case "error":
+		return slog.LevelError
+	default:
+		return slog.LevelInfo
+	}
+}

atsf_agent/internal/nginx/manager.go

@@ -6,7 +6,7 @@ import (
 	"encoding/hex"
 	"errors"
 	"fmt"
-	"log"
+	"log/slog"
 	"os"
 	"os/exec"
 	"path/filepath"
@@ -50,22 +50,22 @@ type PathExecutor struct {
 }
 
 func (e *PathExecutor) Test(ctx context.Context) error {
-	log.Printf("running openresty test with binary: %s", e.Path)
+	slog.Info("running openresty test with binary", "path", e.Path)
 	output, err := e.Runner.Run(ctx, e.Path, "-t")
 	if err != nil {
 		return fmt.Errorf("openresty -t failed: %w: %s", err, string(output))
 	}
-	log.Printf("openresty test succeeded with binary: %s", e.Path)
+	slog.Info("openresty test succeeded with binary", "path", e.Path)
 	return nil
 }
 
 func (e *PathExecutor) Reload(ctx context.Context) error {
-	log.Printf("running openresty reload with binary: %s", e.Path)
+	slog.Info("running openresty reload with binary", "path", e.Path)
 	output, err := e.Runner.Run(ctx, e.Path, "-s", "reload")
 	if err != nil {
 		return fmt.Errorf("openresty reload failed: %w: %s", err, string(output))
 	}
-	log.Printf("openresty reload succeeded with binary: %s", e.Path)
+	slog.Info("openresty reload succeeded with binary", "path", e.Path)
 	return nil
 }
 
@@ -78,7 +78,7 @@ func (e *PathExecutor) CheckHealth(ctx context.Context) error {
 }
 
 func (e *PathExecutor) Restart(ctx context.Context) error {
-	log.Printf("restarting openresty with binary: %s", e.Path)
+	slog.Info("restarting openresty with binary", "path", e.Path)
 	output, err := e.Runner.Run(ctx, e.Path, "-s", "quit")
 	if err != nil {
 		text := string(output)
@@ -90,7 +90,7 @@ func (e *PathExecutor) Restart(ctx context.Context) error {
 	if err != nil {
 		return fmt.Errorf("openresty start failed: %w: %s", err, string(output))
 	}
-	log.Printf("openresty restart succeeded with binary: %s", e.Path)
+	slog.Info("openresty restart succeeded with binary", "path", e.Path)
 	return nil
 }
 
@@ -106,12 +106,12 @@ type DockerExecutor struct {
 }
 
 func (e *DockerExecutor) Test(ctx context.Context) error {
-	log.Printf("running docker openresty test: container=%s image=%s", e.ContainerName, e.Image)
+	slog.Info("running docker openresty test", "container", e.ContainerName, "image", e.Image)
 	output, err := e.runEphemeralRuntimeCommand(ctx, "-t")
 	if err != nil {
 		return fmt.Errorf("docker %s -t failed: %w: %s", dockerRuntimeCommand, err, string(output))
 	}
-	log.Printf("docker openresty test succeeded: container=%s runtime=%s", e.ContainerName, dockerRuntimeCommand)
+	slog.Info("docker openresty test succeeded", "container", e.ContainerName, "runtime", dockerRuntimeCommand)
 	return nil
 }
 
@@ -120,7 +120,7 @@ func (e *DockerExecutor) Reload(ctx context.Context) error {
 }
 
 func (e *DockerExecutor) EnsureRuntime(ctx context.Context, recreate bool) error {
-	log.Printf("ensuring docker openresty runtime: container=%s recreate=%t", e.ContainerName, recreate)
+	slog.Info("ensuring docker openresty runtime", "container", e.ContainerName, "recreate", recreate)
 	output, err := e.Runner.Run(ctx, e.DockerBinary, "inspect", "-f", "{{.State.Running}}", e.ContainerName)
 	if err == nil {
 		if recreate {
@@ -130,7 +130,7 @@ func (e *DockerExecutor) EnsureRuntime(ctx context.Context, recreate bool) error
 			return e.runContainer(ctx)
 		}
 		if strings.TrimSpace(string(output)) == "true" {
-			log.Printf("docker openresty runtime already healthy: container=%s", e.ContainerName)
+			slog.Info("docker openresty runtime already healthy", "container", e.ContainerName)
 			return nil
 		}
 		if err := e.removeContainer(ctx); err != nil {
@@ -142,7 +142,7 @@ func (e *DockerExecutor) EnsureRuntime(ctx context.Context, recreate bool) error
 }
 
 func (e *DockerExecutor) CheckHealth(ctx context.Context) error {
-	log.Printf("checking docker openresty runtime health: container=%s", e.ContainerName)
+	slog.Debug("checking docker openresty runtime health", "container", e.ContainerName)
 	output, err := e.Runner.Run(ctx, e.DockerBinary, "inspect", "-f", "{{.State.Running}}", e.ContainerName)
 	if err != nil {
 		return fmt.Errorf("docker inspect openresty failed: %w: %s", err, string(output))
@@ -158,7 +158,7 @@ func (e *DockerExecutor) Restart(ctx context.Context) error {
 }
 
 func (e *DockerExecutor) removeContainer(ctx context.Context) error {
-	log.Printf("removing docker openresty container: container=%s", e.ContainerName)
+	slog.Info("removing docker openresty container", "container", e.ContainerName)
 	output, err := e.Runner.Run(ctx, e.DockerBinary, "rm", "-f", e.ContainerName)
 	if err != nil {
 		text := string(output)
@@ -167,12 +167,12 @@ func (e *DockerExecutor) removeContainer(ctx context.Context) error {
 		}
 		return fmt.Errorf("docker rm openresty failed: %w: %s", err, text)
 	}
-	log.Printf("docker openresty container removed: container=%s", e.ContainerName)
+	slog.Info("docker openresty container removed", "container", e.ContainerName)
 	return nil
 }
 
 func (e *DockerExecutor) runContainer(ctx context.Context) error {
-	log.Printf("starting docker openresty container: container=%s image=%s", e.ContainerName, e.Image)
+	slog.Info("starting docker openresty container", "container", e.ContainerName, "image", e.Image)
 	runArgs := []string{
 		"run", "-d",
 		"--name", e.ContainerName,
@@ -187,7 +187,7 @@ func (e *DockerExecutor) runContainer(ctx context.Context) error {
 	if runErr != nil {
 		return fmt.Errorf("docker run openresty failed: %w: %s", runErr, string(runOutput))
 	}
-	log.Printf("docker openresty container started: container=%s", e.ContainerName)
+	slog.Info("docker openresty container started", "container", e.ContainerName)
 	return nil
 }
 
@@ -201,39 +201,39 @@ type Manager struct {
 }
 
 func (m *Manager) Apply(ctx context.Context, mainConfig string, routeConfig string, supportFiles []protocol.SupportFile) error {
-	log.Printf("openresty apply started: main_config=%s route_config=%s support_files=%d", m.MainConfigPath, m.RouteConfigPath, len(supportFiles))
+	slog.Info("openresty apply started", "main_config", m.MainConfigPath, "route_config", m.RouteConfigPath, "support_files", len(supportFiles))
 	backup, err := m.backup()
 	if err != nil {
 		return err
 	}
 	if err = m.writeSupportFiles(supportFiles); err != nil {
-		log.Printf("writing support files failed, restoring backup: error=%v", err)
+		slog.Error("writing support files failed, restoring backup", "error", err)
 		_ = m.restore(backup)
 		return err
 	}
 	renderedMainConfig := m.renderMainConfig(mainConfig)
 	if err = os.WriteFile(m.MainConfigPath, []byte(renderedMainConfig), 0o644); err != nil {
-		log.Printf("writing openresty main config failed, restoring backup: error=%v", err)
+		slog.Error("writing openresty main config failed, restoring backup", "error", err)
 		_ = m.restore(backup)
 		return err
 	}
 	renderedRouteConfig := m.renderRouteConfig(routeConfig)
 	if err = os.WriteFile(m.RouteConfigPath, []byte(renderedRouteConfig), 0o644); err != nil {
-		log.Printf("writing openresty route config failed, restoring backup: error=%v", err)
+		slog.Error("writing openresty route config failed, restoring backup", "error", err)
 		_ = m.restore(backup)
 		return err
 	}
 	if err = m.Executor.Test(ctx); err != nil {
-		log.Printf("openresty test failed after config write, restoring backup: error=%v", err)
+		slog.Error("openresty test failed after config write, restoring backup", "error", err)
 		_ = m.restore(backup)
 		return err
 	}
 	if err = m.Executor.Reload(ctx); err != nil {
-		log.Printf("openresty reload failed after config write, restoring backup: error=%v", err)
+		slog.Error("openresty reload failed after config write, restoring backup", "error", err)
 		_ = m.restore(backup)
 		return err
 	}
-	log.Printf("openresty apply completed successfully: main_config=%s route_config=%s", m.MainConfigPath, m.RouteConfigPath)
+	slog.Info("openresty apply completed successfully", "main_config", m.MainConfigPath, "route_config", m.RouteConfigPath)
 	return nil
 }
 
@@ -241,7 +241,7 @@ func (m *Manager) EnsureRuntime(ctx context.Context, recreate bool) error {
 	if m.Executor == nil {
 		return errors.New("executor 未配置")
 	}
-	log.Printf("openresty ensure runtime requested: recreate=%t", recreate)
+	slog.Info("openresty ensure runtime requested", "recreate", recreate)
 	return m.Executor.EnsureRuntime(ctx, recreate)
 }
 
@@ -256,7 +256,7 @@ func (m *Manager) Restart(ctx context.Context) error {
 	if m.Executor == nil {
 		return errors.New("executor 未配置")
 	}
-	log.Printf("openresty restart requested")
+	slog.Info("openresty restart requested")
 	return m.Executor.Restart(ctx)
 }
 
@@ -294,7 +294,7 @@ func (m *Manager) CurrentChecksum() (string, error) {
 		return "", err
 	}
 	result := bundleChecksum(normalizedMain, normalizedRoute, files)
-	log.Printf("openresty current checksum calculated: main_config=%s route_config=%s checksum=%s support_files=%d", m.MainConfigPath, m.RouteConfigPath, result, len(files))
+	slog.Info("openresty current checksum calculated", "main_config", m.MainConfigPath, "route_config", m.RouteConfigPath, "checksum", result, "support_files", len(files))
 	return result, nil
 }
 
@@ -344,10 +344,10 @@ func NewExecutor(options ExecutorOptions) Executor {
 func DetectVersion(ctx context.Context, options ExecutorOptions) string {
 	version, err := detectVersion(ctx, options, &OSCommandRunner{})
 	if err != nil {
-		log.Printf("detect openresty version failed: %v", err)
+		slog.Error("detect openresty version failed", "error", err)
 		return ""
 	}
-	log.Printf("detected openresty version: %s", version)
+	slog.Info("detected openresty version", "version", version)
 	return version
 }
 
@@ -466,7 +466,7 @@ func (m *Manager) backup() (*backupState, error) {
 		return nil, err
 	}
 	state.Files = files
-	log.Printf("backup captured: main_exists=%t route_exists=%t support_files=%d", state.MainExisted, state.RouteExisted, len(state.Files))
+	slog.Info("backup captured", "main_exists", state.MainExisted, "route_exists", state.RouteExisted, "support_files", len(state.Files))
 	return state, nil
 }
 
@@ -474,7 +474,7 @@ func (m *Manager) restore(state *backupState) error {
 	if state == nil {
 		return nil
 	}
-	log.Printf("restoring nginx backup: main_existed=%t route_existed=%t support_files=%d", state.MainExisted, state.RouteExisted, len(state.Files))
+	slog.Warn("restoring nginx backup", "main_existed", state.MainExisted, "route_existed", state.RouteExisted, "support_files", len(state.Files))
 	if state.MainExisted {
 		if err := os.WriteFile(m.MainConfigPath, state.MainData, 0o644); err != nil {
 			return err

atsf_agent/internal/sync/service.go

@@ -4,7 +4,7 @@ import (
 	"context"
 	"crypto/sha256"
 	"encoding/hex"
-	"log"
+	"log/slog"
 	"strings"
 
 	"atsflare-agent/internal/protocol"
@@ -70,13 +70,13 @@ func (s *Service) sync(ctx context.Context, startup bool, target *protocol.Activ
 
 	if target == nil || target.Version == "" || target.Checksum == "" {
 		if !startup {
-			log.Printf("skipping sync because heartbeat returned no active config summary: mode=%s", mode)
+			slog.Debug("skipping sync because heartbeat returned no active config summary", "mode", mode)
 			return nil
 		}
-		log.Printf("sync startup fallback: active config summary unavailable, fetching active config directly")
+		slog.Info("sync startup fallback: active config summary unavailable, fetching active config directly")
 		config, fetchErr := s.client.GetActiveConfig(ctx)
 		if fetchErr != nil {
-			log.Printf("fetch active config failed: mode=%s error=%v", mode, fetchErr)
+			slog.Error("fetch active config failed", "mode", mode, "error", fetchErr)
 			return fetchErr
 		}
 		target = &protocol.ActiveConfigMeta{
@@ -87,33 +87,33 @@ func (s *Service) sync(ctx context.Context, startup bool, target *protocol.Activ
 	}
 
 	if currentChecksum == target.Checksum {
-		log.Printf("local openresty config already up to date: mode=%s version=%s", mode, target.Version)
+		slog.Info("local openresty config already up to date", "mode", mode, "version", target.Version)
 		if startup {
-			log.Printf("ensuring openresty runtime on startup: version=%s", target.Version)
+			slog.Info("ensuring openresty runtime on startup", "version", target.Version)
 			if err = s.nginxManager.EnsureRuntime(ctx, true); err != nil {
 				snapshot.OpenrestyStatus = protocol.OpenrestyStatusUnhealthy
 				snapshot.OpenrestyMessage = err.Error()
 				_ = s.stateStore.Save(snapshot)
 				return err
 			}
-			log.Printf("openresty runtime ensured on startup: version=%s", target.Version)
+			slog.Info("openresty runtime ensured on startup", "version", target.Version)
 			snapshot.OpenrestyStatus = protocol.OpenrestyStatusHealthy
 			snapshot.OpenrestyMessage = ""
 		}
 		snapshot.CurrentVersion = target.Version
 		snapshot.CurrentChecksum = target.Checksum
 		snapshot.LastError = ""
-		log.Printf("sync finished without changes: mode=%s version=%s", mode, target.Version)
+		slog.Info("sync finished without changes", "mode", mode, "version", target.Version)
 		return s.stateStore.Save(snapshot)
 	}
 	if snapshot.CurrentVersion == target.Version && snapshot.CurrentChecksum == target.Checksum && !startup {
-		log.Printf("skipping config fetch because state already records target version/checksum: version=%s checksum=%s", target.Version, target.Checksum)
+		slog.Debug("skipping config fetch because state already records target version/checksum", "version", target.Version, "checksum", target.Checksum)
 		return nil
 	}
 
 	config, err := s.client.GetActiveConfig(ctx)
 	if err != nil {
-		log.Printf("fetch active config failed: mode=%s error=%v", mode, err)
+		slog.Error("fetch active config failed", "mode", mode, "error", err)
 		return err
 	}
 	return s.applyIfNeeded(ctx, mode, startup, snapshot, currentChecksum, target, config)
@@ -121,30 +121,30 @@ func (s *Service) sync(ctx context.Context, startup bool, target *protocol.Activ
 
 func (s *Service) applyIfNeeded(ctx context.Context, mode string, startup bool, snapshot *state.Snapshot, currentChecksum string, target *protocol.ActiveConfigMeta, config *protocol.ActiveConfigResponse) error {
 	if currentChecksum == config.Checksum {
-		log.Printf("local openresty config already up to date: mode=%s version=%s", mode, config.Version)
+		slog.Info("local openresty config already up to date", "mode", mode, "version", config.Version)
 		if startup {
-			log.Printf("ensuring openresty runtime on startup: version=%s", config.Version)
+			slog.Info("ensuring openresty runtime on startup", "version", config.Version)
 			if err := s.nginxManager.EnsureRuntime(ctx, true); err != nil {
 				snapshot.OpenrestyStatus = protocol.OpenrestyStatusUnhealthy
 				snapshot.OpenrestyMessage = err.Error()
 				_ = s.stateStore.Save(snapshot)
 				return err
 			}
-			log.Printf("openresty runtime ensured on startup: version=%s", config.Version)
+			slog.Info("openresty runtime ensured on startup", "version", config.Version)
 			snapshot.OpenrestyStatus = protocol.OpenrestyStatusHealthy
 			snapshot.OpenrestyMessage = ""
 		}
 		snapshot.CurrentVersion = config.Version
 		snapshot.CurrentChecksum = config.Checksum
 		snapshot.LastError = ""
-		log.Printf("sync finished without changes: mode=%s version=%s", mode, config.Version)
+		slog.Info("sync finished without changes", "mode", mode, "version", config.Version)
 		return s.stateStore.Save(snapshot)
 	}
 	if target != nil && (target.Version != config.Version || target.Checksum != config.Checksum) {
-		log.Printf("active config changed between heartbeat and fetch: heartbeat_version=%s heartbeat_checksum=%s fetched_version=%s fetched_checksum=%s", target.Version, target.Checksum, config.Version, config.Checksum)
+		slog.Warn("active config changed between heartbeat and fetch", "heartbeat_version", target.Version, "heartbeat_checksum", target.Checksum, "fetched_version", config.Version, "fetched_checksum", config.Checksum)
 	}
 	if snapshot.CurrentVersion == config.Version && snapshot.CurrentChecksum == config.Checksum && !startup {
-		log.Printf("skipping apply because state already records target version/checksum: version=%s checksum=%s", config.Version, config.Checksum)
+		slog.Debug("skipping apply because state already records target version/checksum", "version", config.Version, "checksum", config.Checksum)
 		return nil
 	}
 	routeConfig := config.RouteConfig
@@ -153,9 +153,9 @@ func (s *Service) applyIfNeeded(ctx context.Context, mode string, startup bool,
 	}
 	mainConfigChecksum := checksumString(config.MainConfig)
 	routeConfigChecksum := checksumString(routeConfig)
-	log.Printf("applying new openresty config: mode=%s from_version=%s to_version=%s old_checksum=%s new_checksum=%s", mode, snapshot.CurrentVersion, config.Version, currentChecksum, config.Checksum)
+	slog.Info("applying new openresty config", "mode", mode, "from_version", snapshot.CurrentVersion, "to_version", config.Version, "old_checksum", currentChecksum, "new_checksum", config.Checksum)
 	if err := s.nginxManager.Apply(ctx, config.MainConfig, routeConfig, config.SupportFiles); err != nil {
-		log.Printf("apply openresty config failed: mode=%s version=%s error=%v", mode, config.Version, err)
+		slog.Error("apply openresty config failed", "mode", mode, "version", config.Version, "error", err)
 		snapshot.LastError = err.Error()
 		snapshot.OpenrestyStatus = protocol.OpenrestyStatusUnhealthy
 		snapshot.OpenrestyMessage = err.Error()
@@ -171,13 +171,13 @@ func (s *Service) applyIfNeeded(ctx context.Context, mode string, startup bool,
 			SupportFileCount:    len(config.SupportFiles),
 		})
 		if reportErr != nil {
-			log.Printf("report failed apply log failed: version=%s error=%v", config.Version, reportErr)
+			slog.Error("report failed apply log failed", "version", config.Version, "error", reportErr)
 			return reportErr
 		}
-		log.Printf("failed apply log reported: version=%s", config.Version)
+		slog.Warn("failed apply log reported", "version", config.Version)
 		return err
 	}
-	log.Printf("openresty config applied successfully: mode=%s version=%s", mode, config.Version)
+	slog.Info("openresty config applied successfully", "mode", mode, "version", config.Version)
 	snapshot.CurrentVersion = config.Version
 	snapshot.CurrentChecksum = config.Checksum
 	snapshot.LastError = ""
@@ -196,10 +196,10 @@ func (s *Service) applyIfNeeded(ctx context.Context, mode string, startup bool,
 		RouteConfigChecksum: routeConfigChecksum,
 		SupportFileCount:    len(config.SupportFiles),
 	}); err != nil {
-		log.Printf("report successful apply log failed: version=%s error=%v", config.Version, err)
+		slog.Error("report successful apply log failed", "version", config.Version, "error", err)
 		return err
 	}
-	log.Printf("successful apply log reported: version=%s", config.Version)
+	slog.Info("successful apply log reported", "version", config.Version)
 	return nil
 }
 

atsf_agent/internal/updater/updater.go

@@ -5,7 +5,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
-	"log"
+	"log/slog"
 	"net/http"
 	"os"
 	"runtime"
@@ -64,7 +64,7 @@ func (s *Service) CheckAndUpdate(ctx context.Context, repo string, options agent
 		return nil
 	}
 
-	log.Printf("agent update available: %s -> %s", localVersion, remoteVersion)
+	slog.Info("agent update available", "from", localVersion, "to", remoteVersion)
 	assetName := assetNameForGOOSGOARCH(runtime.GOOS, runtime.GOARCH)
 
 	var downloadURL string
@@ -219,7 +219,7 @@ func (s *Service) downloadAndRestart(ctx context.Context, url string, targetPath
 	}
 	tmpFile.Close()
 
-	log.Printf("agent binary updated, restarting...")
+	slog.Info("agent binary updated, restarting")
 	return replaceAndRestart(targetPath, tmpPath)
 }
 

atsf_server/common/init.go

@@ -3,7 +3,6 @@ package common
 import (
 	"flag"
 	"fmt"
-	"log"
 	"os"
 	"path/filepath"
 	"strings"
@@ -59,12 +58,12 @@ func init() {
 		var err error
 		*LogDir, err = filepath.Abs(*LogDir)
 		if err != nil {
-			log.Fatal(err)
+			FatalLog(err)
 		}
 		if _, err := os.Stat(*LogDir); os.IsNotExist(err) {
 			err = os.Mkdir(*LogDir, 0777)
 			if err != nil {
-				log.Fatal(err)
+				FatalLog(err)
 			}
 		}
 	}

atsf_server/common/logger.go

@@ -1,15 +1,14 @@
-package common
-
-import (
-	"fmt"
-	"github.com/gin-gonic/gin"
-	"io"
-	"log"
-	"os"
-	"path/filepath"
-	"strings"
-	"time"
-)
+package common
+
+import (
+	"context"
+	"github.com/gin-gonic/gin"
+	"io"
+	"log/slog"
+	"os"
+	"path/filepath"
+	"strings"
+)
 
 type logLevel int
 
@@ -20,19 +19,76 @@ const (
 	logLevelError
 )
 
-var currentLogLevel = logLevelInfo
-var currentLogLevelName = "info"
-var commonLogWriter io.Writer = os.Stdout
-var errorLogWriter io.Writer = os.Stderr
+var currentLogLevel = logLevelInfo
+var currentLogLevelName = "info"
+var commonLogWriter io.Writer = os.Stdout
+var errorLogWriter io.Writer = os.Stderr
+var defaultLogger *slog.Logger
+
+type levelRouterHandler struct {
+	commonHandler slog.Handler
+	errorHandler  slog.Handler
+}
+
+func (h *levelRouterHandler) Enabled(ctx context.Context, level slog.Level) bool {
+	return h.commonHandler.Enabled(ctx, level) || h.errorHandler.Enabled(ctx, level)
+}
+
+func (h *levelRouterHandler) Handle(ctx context.Context, record slog.Record) error {
+	if record.Level >= slog.LevelError {
+		return h.errorHandler.Handle(ctx, record)
+	}
+	return h.commonHandler.Handle(ctx, record)
+}
+
+func (h *levelRouterHandler) WithAttrs(attrs []slog.Attr) slog.Handler {
+	return &levelRouterHandler{
+		commonHandler: h.commonHandler.WithAttrs(attrs),
+		errorHandler:  h.errorHandler.WithAttrs(attrs),
+	}
+}
+
+func (h *levelRouterHandler) WithGroup(name string) slog.Handler {
+	return &levelRouterHandler{
+		commonHandler: h.commonHandler.WithGroup(name),
+		errorHandler:  h.errorHandler.WithGroup(name),
+	}
+}
 
-func configureGinWriters() {
-	if shouldLog(logLevelDebug) {
-		gin.DefaultWriter = commonLogWriter
+func configureGinWriters() {
+	if shouldLog(logLevelDebug) {
+		gin.DefaultWriter = commonLogWriter
 	} else {
 		gin.DefaultWriter = io.Discard
 	}
-	gin.DefaultErrorWriter = errorLogWriter
-}
+	gin.DefaultErrorWriter = errorLogWriter
+}
+
+func slogLevel() slog.Level {
+	switch currentLogLevel {
+	case logLevelDebug:
+		return slog.LevelDebug
+	case logLevelWarn:
+		return slog.LevelWarn
+	case logLevelError:
+		return slog.LevelError
+	default:
+		return slog.LevelInfo
+	}
+}
+
+func ensureLogger() *slog.Logger {
+	if defaultLogger != nil {
+		return defaultLogger
+	}
+	handlerOptions := &slog.HandlerOptions{Level: slogLevel()}
+	defaultLogger = slog.New(&levelRouterHandler{
+		commonHandler: slog.NewTextHandler(commonLogWriter, handlerOptions),
+		errorHandler:  slog.NewTextHandler(errorLogWriter, handlerOptions),
+	})
+	slog.SetDefault(defaultLogger)
+	return defaultLogger
+}
 
 func SetLogLevel(level string) {
 	normalized := strings.TrimSpace(strings.ToLower(level))
@@ -61,42 +117,43 @@ func shouldLog(level logLevel) bool {
 	return level >= currentLogLevel
 }
 
-func SetupGinLog() {
-	if *LogDir != "" {
-		commonLogPath := filepath.Join(*LogDir, "common.log")
-		errorLogPath := filepath.Join(*LogDir, "error.log")
-		commonFd, err := os.OpenFile(commonLogPath, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
-		if err != nil {
-			log.Fatal("failed to open log file")
-		}
-		errorFd, err := os.OpenFile(errorLogPath, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
-		if err != nil {
-			log.Fatal("failed to open log file")
-		}
-		commonLogWriter = io.MultiWriter(os.Stdout, commonFd)
-		errorLogWriter = io.MultiWriter(os.Stderr, errorFd)
-	}
-	configureGinWriters()
-}
-
-func SysLog(s string) {
-	if !shouldLog(logLevelInfo) {
-		return
-	}
-	t := time.Now()
-	_, _ = fmt.Fprintf(commonLogWriter, "[SYS] %v | %s \n", t.Format("2006/01/02 - 15:04:05"), s)
-}
-
-func SysError(s string) {
-	if !shouldLog(logLevelError) {
-		return
-	}
-	t := time.Now()
-	_, _ = fmt.Fprintf(errorLogWriter, "[SYS] %v | %s \n", t.Format("2006/01/02 - 15:04:05"), s)
-}
-
-func FatalLog(v ...any) {
-	t := time.Now()
-	_, _ = fmt.Fprintf(errorLogWriter, "[FATAL] %v | %v \n", t.Format("2006/01/02 - 15:04:05"), v)
-	os.Exit(1)
-}
+func SetupGinLog() {
+	if *LogDir != "" {
+		commonLogPath := filepath.Join(*LogDir, "common.log")
+		errorLogPath := filepath.Join(*LogDir, "error.log")
+		commonFd, err := os.OpenFile(commonLogPath, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
+		if err != nil {
+			_, _ = io.WriteString(os.Stderr, "failed to open common log file\n")
+			os.Exit(1)
+		}
+		errorFd, err := os.OpenFile(errorLogPath, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
+		if err != nil {
+			_, _ = io.WriteString(os.Stderr, "failed to open error log file\n")
+			os.Exit(1)
+		}
+		commonLogWriter = io.MultiWriter(os.Stdout, commonFd)
+		errorLogWriter = io.MultiWriter(os.Stderr, errorFd)
+	}
+	configureGinWriters()
+	defaultLogger = nil
+	ensureLogger()
+}
+
+func SysLog(s string) {
+	if !shouldLog(logLevelInfo) {
+		return
+	}
+	ensureLogger().Info(s)
+}
+
+func SysError(s string) {
+	if !shouldLog(logLevelError) {
+		return
+	}
+	ensureLogger().Error(s)
+}
+
+func FatalLog(v ...any) {
+	ensureLogger().Error("fatal error", "details", v)
+	os.Exit(1)
+}

atsf_server/common/utils.go

@@ -4,7 +4,6 @@ import (
 	"fmt"
 	"github.com/google/uuid"
 	"html/template"
-	"log"
 	"net"
 	"os/exec"
 	"runtime"
@@ -24,14 +23,14 @@ func OpenBrowser(url string) {
 		err = exec.Command("open", url).Start()
 	}
 	if err != nil {
-		log.Println(err)
+		SysError(err.Error())
 	}
 }
 
 func GetIp() (ip string) {
 	ips, err := net.InterfaceAddrs()
 	if err != nil {
-		log.Println(err)
+		SysError(err.Error())
 		return ip
 	}
 

atsf_server/main.go

@@ -12,7 +12,6 @@ import (
 	"github.com/gin-contrib/sessions/cookie"
 	"github.com/gin-contrib/sessions/redis"
 	"github.com/gin-gonic/gin"
-	"log"
 	"os"
 	"strconv"
 )
@@ -87,7 +86,7 @@ func main() {
 	common.SysLog(fmt.Sprintf("server listening on :%s", port))
 	err = server.Run(":" + port)
 	if err != nil {
-		log.Println(err)
+		common.SysError(err.Error())
 	}
 }
 

atsf_server/middleware/rate-limit.go

@@ -3,7 +3,6 @@ package middleware
 import (
 	"atsflare/common"
 	"context"
-	"fmt"
 	"github.com/gin-gonic/gin"
 	"net/http"
 	"time"
@@ -19,7 +18,7 @@ func redisRateLimiter(c *gin.Context, maxRequestNum int, duration int64, mark st
 	key := "rateLimit:" + mark + c.ClientIP()
 	listLength, err := rdb.LLen(ctx, key).Result()
 	if err != nil {
-		fmt.Println(err.Error())
+		common.SysError(err.Error())
 		c.Status(http.StatusInternalServerError)
 		c.Abort()
 		return
@@ -31,7 +30,7 @@ func redisRateLimiter(c *gin.Context, maxRequestNum int, duration int64, mark st
 		oldTimeStr, _ := rdb.LIndex(ctx, key, -1).Result()
 		oldTime, err := time.Parse(timeFormat, oldTimeStr)
 		if err != nil {
-			fmt.Println(err)
+			common.SysError(err.Error())
 			c.Status(http.StatusInternalServerError)
 			c.Abort()
 			return
@@ -39,7 +38,7 @@ func redisRateLimiter(c *gin.Context, maxRequestNum int, duration int64, mark st
 		nowTimeStr := time.Now().Format(timeFormat)
 		nowTime, err := time.Parse(timeFormat, nowTimeStr)
 		if err != nil {
-			fmt.Println(err)
+			common.SysError(err.Error())
 			c.Status(http.StatusInternalServerError)
 			c.Abort()
 			return

atsf_server/service/update.go

@@ -8,7 +8,6 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
-	"log"
 	"net/http"
 	"os"
 	"os/exec"
@@ -137,7 +136,7 @@ func ScheduleServerUpgrade(channel string) (*LatestServerRelease, error) {
 	go func(task *preparedServerUpgrade) {
 		time.Sleep(serverUpgradeDispatchDelay)
 		if err := executeServerUpgrade(task); err != nil {
-			log.Printf("server self-update failed: %v", err)
+			common.SysError(fmt.Sprintf("server self-update failed: %v", err))
 			serverUpgradeState.Lock()
 			serverUpgradeState.inProgress = false
 			serverUpgradeState.Unlock()
@@ -251,7 +250,7 @@ func ConfirmManualServerUpgrade(uploadToken string) (*UploadedServerBinary, erro
 	go func(task *manualServerBinaryCandidate) {
 		time.Sleep(serverUpgradeDispatchDelay)
 		if err := executeManualServerUpgrade(task); err != nil {
-			log.Printf("server manual upgrade failed: %v", err)
+			common.SysError(fmt.Sprintf("server manual upgrade failed: %v", err))
 			serverUpgradeState.Lock()
 			serverUpgradeState.inProgress = false
 			serverUpgradeState.Unlock()

docs/app-config.md

@@ -188,9 +188,22 @@ Agent 当前支持两类启动配置：
 1. 命令行参数
 2. `agent.json` 配置文件
 
-当前 Agent **没有额外环境变量作为正式配置入口**，启动行为主要由 `-config` 参数和配置文件字段决定。
-
-### 2.1 Agent 命令行参数
+当前 Agent 仅支持少量环境变量用于日志输出控制；核心启动行为仍由 `-config` 参数和配置文件字段决定。
+
+### 2.1.1 Agent 环境变量
+
+支持的环境变量：
+
+| 环境变量 | 作用 | 默认值 | 示例 |
+| --- | --- | --- | --- |
+| `LOG_LEVEL` | 指定 Agent 的 `slog` 日志等级；支持 `debug`/`info`/`warn`/`error`（`warning` 兼容为 `warn`） | `info` | `LOG_LEVEL=debug` |
+
+说明：
+
+* `LOG_LEVEL` 只影响 Agent 本地日志输出，不改变心跳、同步或配置行为
+* 未设置或设置为不支持的值时，将回退为 `info`
+
+### 2.1 Agent 命令行参数
 
 启动示例：
 

docs/deployment.md

@@ -6,18 +6,18 @@
 
 ## 1. 前置条件
 
-### 1.1 Server
+### 1.1 Server
+
+* Go 1.23+
+* Node.js 18+
+* 可写 SQLite 文件目录
 
-* Go 1.18+
-* Node.js 18+
-* 可写 SQLite 文件目录
-
-### 1.2 Agent
-
-* Go 1.18+
-* 对 Agent 数据目录有写权限
-* 若使用独立 OpenResty 模式：可执行 `openresty -t` 与 `openresty -s reload`
-* 若使用 Docker 模式：具备 Docker 执行权限
+### 1.2 Agent
+
+* Go 1.23+
+* 对 Agent 数据目录有写权限
+* 若使用独立 OpenResty 模式：可执行 `openresty -t` 与 `openresty -s reload`
+* 若使用 Docker 模式：具备 Docker 执行权限
 * 第五版主配置接管模式下，Agent 对 OpenResty 主配置目标路径必须具备写权限
 
 ---
@@ -41,18 +41,20 @@ pnpm build
 
 ### 2.2 启动服务
 
-```bash
-cd atsf_server
-export SESSION_SECRET='replace-with-random-string'
-export SQLITE_PATH='./atsflare.db'
-go run .
-```
+```bash
+cd atsf_server
+export SESSION_SECRET='replace-with-random-string'
+export SQLITE_PATH='./atsflare.db'
+export LOG_LEVEL='info'
+go run .
+```
 
 说明：
 
-* 默认不依赖全局 `AGENT_TOKEN`
-* 节点接入凭证由数据库维护：节点专属 `agent_token` + 全局 `discovery_token`
-* 默认监听端口为 `3000`
+* 默认不依赖全局 `AGENT_TOKEN`
+* 节点接入凭证由数据库维护：节点专属 `agent_token` + 全局 `discovery_token`
+* 默认监听端口为 `3000`
+* `LOG_LEVEL` 支持 `debug` / `info` / `warn` / `error`
 
 ### 2.3 使用 docker-compose 启动 Server
 
@@ -196,18 +198,20 @@ swag init -g main.go -o docs
 
 ### 4.1 直接运行
 
-```bash
-cd atsf_agent
-go run ./cmd/agent -config /path/to/agent.json
-```
+```bash
+cd atsf_agent
+export LOG_LEVEL='info'
+go run ./cmd/agent -config /path/to/agent.json
+```
 
 ### 4.2 编译后二进制运行
 
-```bash
-cd atsf_agent
-go build -o atsflare-agent ./cmd/agent
-./atsflare-agent -config /path/to/agent.json
-```
+```bash
+cd atsf_agent
+go build -o atsflare-agent ./cmd/agent
+export LOG_LEVEL='info'
+./atsflare-agent -config /path/to/agent.json
+```
 
 ---
 

docs/development-guidelines.md

@@ -21,6 +21,7 @@
 
 `atsf_server` 继续作为单体控制面：
 
+* Go 1.23+
 * Gin
 * GORM
 * SQLite
@@ -36,6 +37,7 @@
 
 `atsf_agent` 继续作为 Go 单体程序：
 
+* Go 1.23+
 * 单二进制
 * 节点本地执行
 * `openresty_path` 优先
@@ -275,6 +277,7 @@ Agent 必须满足：
 
 要求：
 
+* Server 与 Agent 统一使用 `slog` 输出结构化日志
 * 日志足够定位问题
 * 不打印敏感凭证完整值