Initial commit (code only without large binaries)

EdgeDNS/internal/accesslogs/dns_file_writer.go

@@ -0,0 +1,239 @@
+package accesslogs
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+	"sync"
+
+	"github.com/TeaOSLab/EdgeCommon/pkg/rpc/pb"
+	"github.com/TeaOSLab/EdgeCommon/pkg/serverconfigs"
+	"github.com/TeaOSLab/EdgeDNS/internal/remotelogs"
+	"gopkg.in/natefinch/lumberjack.v2"
+)
+
+const (
+	defaultDNSLogDir = "/var/log/edge/edge-dns"
+	envDNSLogDir     = "EDGE_DNS_LOG_DIR"
+)
+
+var (
+	sharedDNSFileWriter     *DNSFileWriter
+	sharedDNSFileWriterOnce sync.Once
+)
+
+// SharedDNSFileWriter 返回 DNS 本地日志写入器（单例）.
+func SharedDNSFileWriter() *DNSFileWriter {
+	sharedDNSFileWriterOnce.Do(func() {
+		sharedDNSFileWriter = NewDNSFileWriter()
+	})
+	return sharedDNSFileWriter
+}
+
+// DNSFileWriter 将 DNS 访问日志以 JSON Lines 写入本地文件，供 Fluent Bit 采集。
+// 文件轮转由 lumberjack 内建完成。
+type DNSFileWriter struct {
+	dir          string
+	mu           sync.Mutex
+	file         *lumberjack.Logger
+	rotateConfig *serverconfigs.AccessLogRotateConfig
+	inited       bool
+}
+
+// NewDNSFileWriter 创建 DNS 本地日志写入器.
+func NewDNSFileWriter() *DNSFileWriter {
+	logDir := resolveDefaultDNSLogDir()
+	return &DNSFileWriter{
+		dir:          logDir,
+		rotateConfig: serverconfigs.NewDefaultAccessLogRotateConfig(),
+	}
+}
+
+func resolveDefaultDNSLogDir() string {
+	logDir := strings.TrimSpace(os.Getenv(envDNSLogDir))
+	if logDir == "" {
+		return defaultDNSLogDir
+	}
+	return logDir
+}
+
+func resolveDNSDirFromPolicyPath(policyPath string) string {
+	policyPath = strings.TrimSpace(policyPath)
+	if policyPath == "" {
+		return ""
+	}
+
+	if strings.HasSuffix(policyPath, "/") || strings.HasSuffix(policyPath, "\\") {
+		return filepath.Clean(policyPath)
+	}
+
+	baseName := filepath.Base(policyPath)
+	if strings.Contains(baseName, ".") || strings.Contains(baseName, "${") {
+		return filepath.Clean(filepath.Dir(policyPath))
+	}
+
+	return filepath.Clean(policyPath)
+}
+
+// Dir 返回当前日志目录.
+func (w *DNSFileWriter) Dir() string {
+	return w.dir
+}
+
+// SetDirByPolicyPath 使用公用日志策略 path 更新目录，空值时回退到 EDGE_DNS_LOG_DIR/default。
+func (w *DNSFileWriter) SetDirByPolicyPath(policyPath string) {
+	dir := resolveDNSDirFromPolicyPath(policyPath)
+	w.SetDir(dir)
+}
+
+// SetDir 更新目录并重置文件句柄。
+func (w *DNSFileWriter) SetDir(dir string) {
+	if strings.TrimSpace(dir) == "" {
+		dir = resolveDefaultDNSLogDir()
+	}
+
+	w.mu.Lock()
+	defer w.mu.Unlock()
+
+	if dir == w.dir {
+		return
+	}
+
+	if w.file != nil {
+		_ = w.file.Close()
+		w.file = nil
+	}
+	w.inited = false
+	w.dir = dir
+}
+
+// SetRotateConfig 更新日志轮转配置并重建 writer。
+func (w *DNSFileWriter) SetRotateConfig(config *serverconfigs.AccessLogRotateConfig) {
+	normalized := config.Normalize()
+
+	w.mu.Lock()
+	defer w.mu.Unlock()
+
+	if equalDNSRotateConfig(w.rotateConfig, normalized) {
+		return
+	}
+
+	if w.file != nil {
+		_ = w.file.Close()
+		w.file = nil
+	}
+	w.inited = false
+	w.rotateConfig = normalized
+}
+
+// EnsureInit 在启动时预创建目录与 access.log.
+func (w *DNSFileWriter) EnsureInit() error {
+	if w.dir == "" {
+		return nil
+	}
+	return w.init()
+}
+
+func (w *DNSFileWriter) init() error {
+	w.mu.Lock()
+	defer w.mu.Unlock()
+
+	if w.inited && w.file != nil {
+		return nil
+	}
+
+	if w.dir == "" {
+		return nil
+	}
+
+	if err := os.MkdirAll(w.dir, 0755); err != nil {
+		remotelogs.Error("DNS_ACCESS_LOG_FILE", "mkdir log dir failed: "+err.Error())
+		return err
+	}
+
+	rotateConfig := w.rotateConfig.Normalize()
+	w.file = &lumberjack.Logger{
+		Filename:   filepath.Join(w.dir, "access.log"),
+		MaxSize:    rotateConfig.MaxSizeMB,
+		MaxBackups: rotateConfig.MaxBackups,
+		MaxAge:     rotateConfig.MaxAgeDays,
+		Compress:   *rotateConfig.Compress,
+		LocalTime:  *rotateConfig.LocalTime,
+	}
+
+	w.inited = true
+	return nil
+}
+
+// WriteBatch 批量写入 DNS 访问日志.
+func (w *DNSFileWriter) WriteBatch(logs []*pb.NSAccessLog, clusterId int64) {
+	if len(logs) == 0 || w.dir == "" {
+		return
+	}
+	if err := w.init(); err != nil {
+		return
+	}
+
+	w.mu.Lock()
+	file := w.file
+	w.mu.Unlock()
+	if file == nil {
+		return
+	}
+
+	for _, logItem := range logs {
+		ingestLog := FromNSAccessLog(logItem, clusterId)
+		if ingestLog == nil {
+			continue
+		}
+		line, err := json.Marshal(ingestLog)
+		if err != nil {
+			continue
+		}
+		_, _ = file.Write(append(line, '\n'))
+	}
+}
+
+// Reopen 关闭并重建日志 writer（供兼容调用）.
+func (w *DNSFileWriter) Reopen() error {
+	w.mu.Lock()
+	if w.file != nil {
+		_ = w.file.Close()
+		w.file = nil
+	}
+	w.inited = false
+	w.mu.Unlock()
+	return w.init()
+}
+
+// Close 关闭日志文件.
+func (w *DNSFileWriter) Close() error {
+	w.mu.Lock()
+	defer w.mu.Unlock()
+
+	if w.file == nil {
+		return nil
+	}
+
+	err := w.file.Close()
+	w.file = nil
+	w.inited = false
+	if err != nil {
+		remotelogs.Error("DNS_ACCESS_LOG_FILE", fmt.Sprintf("close access.log failed: %v", err))
+		return err
+	}
+	return nil
+}
+
+func equalDNSRotateConfig(left *serverconfigs.AccessLogRotateConfig, right *serverconfigs.AccessLogRotateConfig) bool {
+	if left == nil || right == nil {
+		return left == right
+	}
+	return left.MaxSizeMB == right.MaxSizeMB &&
+		left.MaxBackups == right.MaxBackups &&
+		left.MaxAgeDays == right.MaxAgeDays &&
+		*left.Compress == *right.Compress &&
+		*left.LocalTime == *right.LocalTime
+}