auto update: create an event

Create an auto-update event for each invocation, independent if images
and containers are updated or not.  Those events will be indicated in
the events already but users will now know why.

Fixes: #14283
Signed-off-by: Valentin Rothberg <vrothberg@redhat.com>

libpod/events.go

@@ -89,8 +89,8 @@ func (p *Pod) newPodEvent(status events.Status) {
 	}
 }
 
-// newSystemEvent creates a new event for libpod as a whole.
-func (r *Runtime) newSystemEvent(status events.Status) {
+// NewSystemEvent creates a new event for libpod as a whole.
+func (r *Runtime) NewSystemEvent(status events.Status) {
 	e := events.NewEvent(status)
 	e.Type = events.System
 

libpod/events/events.go

@@ -150,6 +150,8 @@ func StringToStatus(name string) (Status, error) {
 	switch name {
 	case Attach.String():
 		return Attach, nil
+	case AutoUpdate.String():
+		return AutoUpdate, nil
 	case Build.String():
 		return Build, nil
 	case Checkpoint.String():

libpod/runtime.go

@@ -930,7 +930,7 @@ func (r *Runtime) refresh(alivePath string) error {
 	}
 	defer file.Close()
 
-	r.newSystemEvent(events.Refresh)
+	r.NewSystemEvent(events.Refresh)
 
 	return nil
 }

libpod/runtime_renumber.go

@@ -71,7 +71,7 @@ func (r *Runtime) renumberLocks() error {
 		}
 	}
 
-	r.newSystemEvent(events.Renumber)
+	r.NewSystemEvent(events.Renumber)
 
 	return nil
 }

pkg/autoupdate/autoupdate.go

@@ -12,6 +12,7 @@ import (
 	"github.com/containers/image/v5/transports/alltransports"
 	"github.com/containers/podman/v4/libpod"
 	"github.com/containers/podman/v4/libpod/define"
+	"github.com/containers/podman/v4/libpod/events"
 	"github.com/containers/podman/v4/pkg/domain/entities"
 	"github.com/containers/podman/v4/pkg/systemd"
 	systemdDefine "github.com/containers/podman/v4/pkg/systemd/define"
@@ -142,6 +143,8 @@ func AutoUpdate(ctx context.Context, runtime *libpod.Runtime, options entities.A
 	}
 	defer conn.Close()
 
+	runtime.NewSystemEvent(events.AutoUpdate)
+
 	// Update all images/container according to their auto-update policy.
 	var allReports []*entities.AutoUpdateReport
 	updatedRawImages := make(map[string]bool)

test/system/255-auto-update.bats

@@ -135,15 +135,27 @@ function _confirm_update() {
 # This test can fail in dev. environment because of SELinux.
 # quick fix: chcon -t container_runtime_exec_t ./bin/podman
 @test "podman auto-update - label io.containers.autoupdate=image" {
+    since=$(date --iso-8601=seconds)
+    run_podman auto-update
+    is "$output" ""
+    run_podman events --filter type=system --since $since --stream=false
+    is "$output" ""
+
     generate_service alpine image
 
     _wait_service_ready container-$cname.service
+    since=$(date --iso-8601=seconds)
     run_podman auto-update --dry-run --format "{{.Unit}},{{.Image}},{{.Updated}},{{.Policy}}"
     is "$output" ".*container-$cname.service,quay.io/libpod/alpine:latest,pending,registry.*" "Image update is pending."
+    run_podman events --filter type=system --since $since --stream=false
+    is "$output" ".* system auto-update"
 
+    since=$(date --iso-8601=seconds)
     run_podman auto-update --format "{{.Unit}},{{.Image}},{{.Updated}},{{.Policy}}"
     is "$output" "Trying to pull.*" "Image is updated."
     is "$output" ".*container-$cname.service,quay.io/libpod/alpine:latest,true,registry.*" "Image is updated."
+    run_podman events --filter type=system --since $since --stream=false
+    is "$output" ".* system auto-update"
 
     _confirm_update $cname $ori_image
 }