multi: move logcompressor to logging.file.compressor

This is not a breaking change since the logcompressor config option has
not been released yet.

build/config.go

@@ -1,11 +1,17 @@
 package build
 
-import "github.com/btcsuite/btclog/v2"
+import (
+	"fmt"
+
+	"github.com/btcsuite/btclog/v2"
+)
 
 const (
 	callSiteOff   = "off"
 	callSiteShort = "short"
 	callSiteLong  = "long"
+
+	defaultLogCompressor = Gzip
 )
 
 // LogConfig holds logging configuration options.
@@ -16,6 +22,16 @@ type LogConfig struct {
 	File    *FileLoggerConfig `group:"file" namespace:"file" description:"The logger writing to LND's standard log file."`
 }
 
+// Validate validates the LogConfig struct values.
+func (c *LogConfig) Validate() error {
+	if !SupportedLogCompressor(c.File.Compressor) {
+		return fmt.Errorf("invalid log compressor: %v",
+			c.File.Compressor)
+	}
+
+	return nil
+}
+
 // LoggerConfig holds options for a particular logger.
 //
 //nolint:lll
@@ -30,6 +46,7 @@ func DefaultLogConfig() *LogConfig {
 	return &LogConfig{
 		Console: defaultConsoleLoggerCfg(),
 		File: &FileLoggerConfig{
+			Compressor: defaultLogCompressor,
 			LoggerConfig: LoggerConfig{
 				CallSite: callSiteOff,
 			},
@@ -63,6 +80,9 @@ func (cfg *LoggerConfig) HandlerOptions() []btclog.HandlerOption {
 }
 
 // FileLoggerConfig extends LoggerConfig with specific log file options.
+//
+//nolint:lll
 type FileLoggerConfig struct {
 	LoggerConfig
+	Compressor string `long:"compressor" description:"Compression algorithm to use when rotating logs." choice:"gzip" choice:"zstd"`
 }

build/log.go

@@ -52,9 +52,9 @@ var logCompressors = map[string]string{
 	Zstd: "zst",
 }
 
-// SuportedLogCompressor returns whether or not logCompressor is a supported
+// SupportedLogCompressor returns whether or not logCompressor is a supported
 // compression algorithm for log files.
-func SuportedLogCompressor(logCompressor string) bool {
+func SupportedLogCompressor(logCompressor string) bool {
 	_, ok := logCompressors[logCompressor]
 
 	return ok

build/logrotator.go

@@ -48,7 +48,7 @@ func (r *RotatingLogWriter) InitLogRotator(logFile, logCompressor string,
 	}
 
 	// Reject unknown compressors.
-	if !SuportedLogCompressor(logCompressor) {
+	if !SupportedLogCompressor(logCompressor) {
 		return fmt.Errorf("unknown log compressor: %v", logCompressor)
 	}
 

config.go

@@ -59,7 +59,6 @@ const (
 	defaultLogLevel           = "info"
 	defaultLogDirname         = "logs"
 	defaultLogFilename        = "lnd.log"
-	defaultLogCompressor      = build.Gzip
 	defaultRPCPort            = 10009
 	defaultRESTPort           = 8080
 	defaultPeerPort           = 9735
@@ -316,7 +315,6 @@ type Config struct {
 	ReadMacPath     string        `long:"readonlymacaroonpath" description:"Path to write the read-only macaroon for lnd's RPC and REST services if it doesn't exist"`
 	InvoiceMacPath  string        `long:"invoicemacaroonpath" description:"Path to the invoice-only macaroon for lnd's RPC and REST services if it doesn't exist"`
 	LogDir          string        `long:"logdir" description:"Directory to log output."`
-	LogCompressor   string        `long:"logcompressor" description:"Compression algorithm to use when rotating logs." choice:"gzip" choice:"zstd"`
 	MaxLogFiles     int           `long:"maxlogfiles" description:"Maximum logfiles to keep (0 for no rotation)"`
 	MaxLogFileSize  int           `long:"maxlogfilesize" description:"Maximum logfile size in MB"`
 	AcceptorTimeout time.Duration `long:"acceptortimeout" description:"Time after which an RPCAcceptor will time out and return false if it hasn't yet received a response"`
@@ -564,7 +562,6 @@ func DefaultConfig() Config {
 		LetsEncryptDir:    defaultLetsEncryptDir,
 		LetsEncryptListen: defaultLetsEncryptListen,
 		LogDir:            defaultLogDir,
-		LogCompressor:     defaultLogCompressor,
 		MaxLogFiles:       defaultMaxLogFiles,
 		MaxLogFileSize:    defaultMaxLogFileSize,
 		AcceptorTimeout:   defaultAcceptorTimeout,
@@ -1403,9 +1400,8 @@ func ValidateConfig(cfg Config, interceptor signal.Interceptor, fileParser,
 		lncfg.NormalizeNetwork(cfg.ActiveNetParams.Name),
 	)
 
-	if !build.SuportedLogCompressor(cfg.LogCompressor) {
-		return nil, mkErr("invalid log compressor: %v",
-			cfg.LogCompressor)
+	if err := cfg.LogConfig.Validate(); err != nil {
+		return nil, mkErr("error validating logging config: %w", err)
 	}
 
 	cfg.SubLogMgr = build.NewSubLoggerManager(build.NewDefaultLogHandlers(
@@ -1423,7 +1419,8 @@ func ValidateConfig(cfg Config, interceptor signal.Interceptor, fileParser,
 	}
 	err = cfg.LogRotator.InitLogRotator(
 		filepath.Join(cfg.LogDir, defaultLogFilename),
-		cfg.LogCompressor, cfg.MaxLogFileSize, cfg.MaxLogFiles,
+		cfg.LogConfig.File.Compressor, cfg.MaxLogFileSize,
+		cfg.MaxLogFiles,
 	)
 	if err != nil {
 		str := "log rotation setup failed: %v"

docs/release-notes/release-notes-0.19.0.md

@@ -57,7 +57,9 @@
 # Improvements
 ## Functional Updates
 
-* [Allow](https://github.com/lightningnetwork/lnd/pull/9017) the compression of logs during rotation with ZSTD via the `logcompressor` startup argument.
+* [Allow](https://github.com/lightningnetwork/lnd/pull/9017) the compression of 
+  logs during rotation with ZSTD via the `logging.file.compressor` startup 
+  argument.
 
 * The SCB file now [contains more data][https://github.com/lightningnetwork/lnd/pull/8183]
   that enable a last resort rescue for certain cases where the peer is no longer

sample-lnd.conf

@@ -36,9 +36,6 @@
 ; Max log file size in MB before it is rotated.
 ; maxlogfilesize=10
 
-; Compression algorithm to use when rotating logs.
-; logcompressor=gzip
-
 ; Time after which an RPCAcceptor will time out and return false if
 ; it hasn't yet received a response.
 ; acceptortimeout=15s
@@ -988,6 +985,12 @@
 ; Disable logging to the standard LND log file.
 ; logging.file.disable=false
 
+; Compression algorithm to use when rotating logs.
+; Default:
+;   logging.file.compressor=gzip
+; Example:
+;   logging.file.compressor=zstd
+
 ; Don't add timestamps to logs written to the standard LND log file.
 ; logging.file.no-timestamps=false