fix: podman event --filter volume=vol-name should compare the event name with volume name

Fixes: https://github.com/containers/podman/issues/18618

Signed-off-by: Gunjan Vyas <vyasgun20@gmail.com>

libpod/events/filters.go

@@ -52,7 +52,8 @@ func generateEventFilter(filter, filterValue string) (func(e *Event) bool, error
 			if e.Type != Volume {
 				return false
 			}
-			return strings.HasPrefix(e.ID, filterValue)
+			// Prefix match with name for consistency with docker
+			return strings.HasPrefix(e.Name, filterValue)
 		}, nil
 	case "TYPE":
 		return func(e *Event) bool {

test/e2e/common_test.go

@@ -718,6 +718,19 @@ func (p *PodmanTestIntegration) CreatePod(options map[string][]string) (*PodmanS
 	return session, session.ExitCode(), session.OutputToString()
 }
 
+func (p *PodmanTestIntegration) CreateVolume(options map[string][]string) (*PodmanSessionIntegration, int, string) {
+	var args = []string{"volume", "create"}
+	for k, values := range options {
+		for _, v := range values {
+			args = append(args, k+"="+v)
+		}
+	}
+
+	session := p.Podman(args)
+	session.WaitWithDefaultTimeout()
+	return session, session.ExitCode(), session.OutputToString()
+}
+
 func (p *PodmanTestIntegration) RunTopContainerInPod(name, pod string) *PodmanSessionIntegration {
 	return p.RunTopContainerWithArgs(name, []string{"--pod", pod})
 }

test/e2e/events_test.go

@@ -38,6 +38,26 @@ var _ = Describe("Podman events", func() {
 		date := time.Now().Format("2006-01-02")
 		Expect(result.OutputToStringArray()).To(ContainElement(HavePrefix(date)), "event log has correct timestamp")
 	})
+	It("podman events with a volume filter", func() {
+		_, ec, vname := podmanTest.CreateVolume(nil)
+		Expect(ec).To(Equal(0))
+
+		// Run two event commands - one with the full volume name and the second with the prefix
+		result := podmanTest.Podman([]string{"events", "--stream=false", "--filter", fmt.Sprintf("volume=%s", vname)})
+		resultPrefix := podmanTest.Podman([]string{"events", "--stream=false", "--filter", fmt.Sprintf("volume=%s", vname[:5])})
+
+		result.WaitWithDefaultTimeout()
+		Expect(result).Should(Exit(0))
+		events := result.OutputToStringArray()
+		Expect(events).To(HaveLen(1), "number of events")
+		Expect(events[0]).To(ContainSubstring(vname), "event log includes volume name")
+
+		resultPrefix.WaitWithDefaultTimeout()
+		Expect(resultPrefix).Should(Exit(0))
+		events = resultPrefix.OutputToStringArray()
+		Expect(events).To(HaveLen(1), "number of events")
+		Expect(events[0]).To(ContainSubstring(vname), "event log includes volume name")
+	})
 
 	It("podman events with an event filter and container=cid", func() {
 		_, ec, cid := podmanTest.RunLsContainer("")

test/system/090-events.bats

@@ -382,3 +382,18 @@ EOF
         --stream=false
     is "${lines[0]}" ".* container died .* (image=$IMAGE, name=$cname, .*)"
 }
+
+@test "events - volume events" {
+    local vname=v$(random_string 10)
+    run_podman volume create $vname
+    run_podman volume rm $vname
+
+    run_podman events --since=1m --stream=false --filter volume=$vname
+    notrunc_results="$output"
+    assert "${lines[0]}" =~ ".* volume create $vname"
+    assert "${lines[1]}" =~ ".* volume remove $vname"
+
+    # Prefix test
+    run_podman events --since=1m --stream=false --filter volume=${vname:0:5}
+    assert "$output" = "$notrunc_results"
+}