Do not hard fail on non-decodable events

Signed-off-by: Matthew Heon <mheon@redhat.com>

libpod/events/events.go

@@ -92,7 +92,7 @@ func StringToType(name string) (Type, error) {
 	case Volume.String():
 		return Volume, nil
 	}
-	return "", errors.Errorf("unknown event type %s", name)
+	return "", errors.Errorf("unknown event type %q", name)
 }
 
 // StringToStatus converts a string to an Event Status
@@ -111,7 +111,6 @@ func StringToStatus(name string) (Status, error) {
 	case Commit.String():
 		return Commit, nil
 	case Create.String():
-
 		return Create, nil
 	case Exec.String():
 		return Exec, nil
@@ -164,7 +163,7 @@ func StringToStatus(name string) (Status, error) {
 	case Untag.String():
 		return Untag, nil
 	}
-	return "", errors.Errorf("unknown event status %s", name)
+	return "", errors.Errorf("unknown event status %q", name)
 }
 
 func (e EventLogFile) getTail(options ReadOptions) (*tail.Tail, error) {

libpod/events/journal_linux.go

@@ -7,6 +7,7 @@ import (
 	"github.com/coreos/go-systemd/journal"
 	"github.com/coreos/go-systemd/sdjournal"
 	"github.com/pkg/errors"
+	"github.com/sirupsen/logrus"
 )
 
 // EventJournalD is the journald implementation of an eventer
@@ -87,7 +88,11 @@ func (e EventJournalD) Read(options ReadOptions) error {
 		}
 		newEvent, err := newEventFromJournalEntry(entry)
 		if err != nil {
-			return err
+			// We can't decode this event.
+			// Don't fail hard - that would make events unusable.
+			// Instead, log and continue.
+			logrus.Errorf("Unable to decode event: %v", err)
+			continue
 		}
 		include := true
 		for _, filter := range eventOptions {