set default EventsLogFilePath on first run

The current code only sets EventsLogFilePath when the tmp is overwritten
from the db. We should always set the default when no path was set in
containers.conf.

Signed-off-by: Paul Holzinger <pholzing@redhat.com>

libpod/events.go

@@ -3,6 +3,7 @@ package libpod
 import (
 	"context"
 	"fmt"
+	"path/filepath"
 	"sync"
 
 	"github.com/containers/podman/v4/libpod/events"
@@ -11,6 +12,10 @@ import (
 
 // newEventer returns an eventer that can be used to read/write events
 func (r *Runtime) newEventer() (events.Eventer, error) {
+	if r.config.Engine.EventsLogFilePath == "" {
+		// default, use path under tmpdir when none was explicitly set by the user
+		r.config.Engine.EventsLogFilePath = filepath.Join(r.config.Engine.TmpDir, "events", "events.log")
+	}
 	options := events.EventerOptions{
 		EventerType:    r.config.Engine.EventsLogger,
 		LogFilePath:    r.config.Engine.EventsLogFilePath,

libpod/events/logfile.go

@@ -38,7 +38,7 @@ func newLogFileEventer(options EventerOptions) (*EventLogFile, error) {
 	// https://github.com/containers/podman/issues/15688
 	fd, err := os.OpenFile(options.LogFilePath, os.O_RDONLY|os.O_CREATE, 0700)
 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("failed to create event log file: %w", err)
 	}
 	return &EventLogFile{options: options}, fd.Close()
 }

libpod/runtime.go

@@ -1030,9 +1030,6 @@ func (r *Runtime) mergeDBConfig(dbConfig *DBConfig) {
 			logrus.Debugf("Overriding tmp dir %q with %q from database", c.TmpDir, dbConfig.LibpodTmp)
 		}
 		c.TmpDir = dbConfig.LibpodTmp
-		if c.EventsLogFilePath == "" {
-			c.EventsLogFilePath = filepath.Join(dbConfig.LibpodTmp, "events", "events.log")
-		}
 	}
 
 	if !r.storageSet.VolumePathSet && dbConfig.VolumePath != "" {