filter events by labels

adding the ability to filter evens by the container labels.  this requires that container labels be added to the events data being recorded and subsequently read.

Signed-off-by: baude <bbaude@redhat.com>

1 files changed, 23 insertions, 0 deletions

diff --git a/libpod/events/journal_linux.go b/libpod/events/journal_linux.go
index dc55dbc77..5d17a85b4 100644
--- a/libpod/events/journal_linux.go
+++ b/libpod/events/journal_linux.go
@@ -4,6 +4,7 @@ package events
 
 import (
 	"context"
+	"encoding/json"
 	"strconv"
 	"time"
 
@@ -46,6 +47,15 @@ func (e EventJournalD) Write(ee Event) error {
 		if ee.ContainerExitCode != 0 {
 			m["PODMAN_EXIT_CODE"] = strconv.Itoa(ee.ContainerExitCode)
 		}
+		// If we have container labels, we need to convert them to a string so they
+		// can be recorded with the event
+		if len(ee.Details.Attributes) > 0 {
+			b, err := json.Marshal(ee.Details.Attributes)
+			if err != nil {
+				return err
+			}
+			m["PODMAN_LABELS"] = string(b)
+		}
 	case Volume:
 		m["PODMAN_NAME"] = ee.Name
 	}
@@ -174,6 +184,19 @@ func newEventFromJournalEntry(entry *sdjournal.JournalEntry) (*Event, error) { /
 				newEvent.ContainerExitCode = intCode
 			}
 		}
+
+		// we need to check for the presence of labels recorded to a container event
+		if stringLabels, ok := entry.Fields["PODMAN_LABELS"]; ok && len(stringLabels) > 0 {
+			labels := make(map[string]string, 0)
+			if err := json.Unmarshal([]byte(stringLabels), &labels); err != nil {
+				return nil, err
+			}
+
+			// if we have labels, add them to the event
+			if len(labels) > 0 {
+				newEvent.Details = Details{Attributes: labels}
+			}
+		}
 	case Image:
 		newEvent.ID = entry.Fields["PODMAN_ID"]
 	}