Use lumberjack to write the log file

cmd/root.go

@@ -6,8 +6,8 @@ package cmd
 
 import (
 	"fmt"
-	"log/syslog"
 	"os"
+	"path"
 	"runtime/pprof"
 	"strconv"
 	"strings"
@@ -16,6 +16,7 @@ import (
 	"github.com/rs/zerolog"
 	"github.com/rs/zerolog/log"
 	"github.com/spf13/cobra"
+	"gopkg.in/natefinch/lumberjack.v2"
 )
 
 var Version = "0.0.0"
@@ -36,6 +37,11 @@ var serverConfig string
 var cpuProfile string
 var memProfile string
 
+// The default directory where log files are written.
+const logDir = "/var/log/hub/"
+const logFileName = "iss2.log"
+const globalLogPath = logDir + logFileName
+
 func init() {
 	rootCmd.PersistentPreRun = func(cmd *cobra.Command, args []string) {
 		logInit()
@@ -71,12 +77,32 @@ func logCallerMarshalFunction(file string, line int) string {
 	return callerFile + ":" + strconv.Itoa(line)
 }
 
-func logInit() {
-	syslogger, err := syslog.New(syslog.LOG_INFO|syslog.LOG_DEBUG|syslog.LOG_WARNING|syslog.LOG_ERR, "inter-server-sync")
+func getFileWriter() *lumberjack.Logger {
+	logPath := globalLogPath
+	if file, err := os.OpenFile(logPath, os.O_CREATE|os.O_APPEND|os.O_RDWR, 0600); err != nil {
+		homeDir, err := os.UserHomeDir()
+		if err != nil {
+			logPath = path.Join(".", logFileName)
+		} else {
+			logPath = path.Join(homeDir, logFileName)
+		}
+	} else {
+		file.Close()
+	}
 
-	syslogwriter := zerolog.SyslogLevelWriter(syslogger)
+	fileLogger := lumberjack.Logger{
+		Filename:   logPath,
+		MaxSize:    10,
+		MaxBackups: 5,
+		MaxAge:     7,
+		Compress:   true,
+	}
+	return &fileLogger
+}
 
-	multi := zerolog.MultiLevelWriter(syslogwriter, os.Stdout)
+func logInit() {
+	fileWriter := getFileWriter()
+	multi := zerolog.MultiLevelWriter(fileWriter, os.Stdout)
 	log.Logger = zerolog.New(multi).With().Timestamp().Caller().Logger()
 	zerolog.CallerMarshalFunc = logCallerMarshalFunction
 	level, err := zerolog.ParseLevel(logLevel)

go.mod

@@ -8,6 +8,7 @@ require (
 	github.com/rs/zerolog v1.21.0
 	github.com/spf13/cobra v1.1.3
 	github.com/uyuni-project/xmlrpc-public-methods v0.0.0-20200805144514-2ca831c526d1
+	gopkg.in/natefinch/lumberjack.v2 v2.2.1
 )
 
 require (

go.sum

@@ -298,6 +298,8 @@ gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
 gopkg.in/ini.v1 v1.51.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
+gopkg.in/natefinch/lumberjack.v2 v2.2.1 h1:bBRl1b0OH9s/DuPhuXpNl+VtCaJXFZ5/uEFST95x9zc=
+gopkg.in/natefinch/lumberjack.v2 v2.2.1/go.mod h1:YD8tP3GAjkrDg1eZH7EGmyESg/lsYskCTPBJVb9jqSc=
 gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
 gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

inter-server-sync.changes.cbosdo.rsyslog

@@ -0,0 +1 @@
+- Write log to a rotated file without rsyslog and logrotate

inter-server-sync.spec

@@ -45,11 +45,8 @@ BuildRequires:  golang >= 1.18
 %else
 BuildRequires:  golang(API) >= 1.20
 %endif
-BuildRequires:  rsyslog
 
 Requires:       gzip
-Requires:       logrotate
-Requires:       rsyslog
 Requires:       systemd
 Requires:       openssl
 
@@ -75,25 +72,12 @@ export GOFLAGS=-mod=vendor
 # Add config files for hub
 install -d -m 0750 %{buildroot}%{_var}/log/hub
 
-# Add syslog config to redirect logs to /var/log/hub/iss2.log
-install -D -m 0644 release/hub-iss-syslogs.conf %{buildroot}%{_sysconfdir}/rsyslog.d/hub-iss.conf
-
-#logrotate config
-install -D -m 0644 release/hub-iss-logrotate.conf %{buildroot}%{_sysconfdir}/logrotate.d/inter-server-sync
-
 %check
 %if 0%{?rhel}
 # Fix OBS debug_package execution.
 rm -f %{buildroot}/usr/lib/debug/%{_bindir}/%{name}-%{version}-*.debug
 %endif
 
-%post
-%if 0%{?rhel}
-%systemd_postun rsyslog.service
-%else
-%service_del_postun rsyslog.service
-%endif
-
 %files -f file.lst
 %dir %attr(0750, root, root) %{_var}/log/hub
 
@@ -102,7 +86,4 @@ rm -f %{buildroot}/usr/lib/debug/%{_bindir}/%{name}-%{version}-*.debug
 %license LICENSES
 %{_bindir}/inter-server-sync
 
-%config(noreplace) %{_sysconfdir}/rsyslog.d/hub-iss.conf
-%config(noreplace) %{_sysconfdir}/logrotate.d/inter-server-sync
-
 %changelog