Add ignorable restore error logs and unit test

tests/e2e/lib/velero_helpers.go

@@ -164,6 +164,10 @@ var errorIgnorePatterns = []string{
 	"blob unknown",
 	"num errors=0",
 	"level=debug", // debug logs may contain the text error about recoverable errors so ignore them
+
+	// Ignore managed fields errors per https://github.com/vmware-tanzu/velero/pull/6110 and avoid e2e failure.
+	// https://prow.ci.openshift.org/view/gs/origin-ci-test/pr-logs/pull/openshift_oadp-operator/1126/pull-ci-openshift-oadp-operator-master-4.10-operator-e2e-aws/1690109468546699264#1:build-log.txt%3A686
+	"level=error msg=\"error patch for managed fields ",
 }
 
 func recoverFromPanicLogs(veleroNamespace string, panicReason interface{}, panicFrom string) string {
@@ -178,37 +182,21 @@ func recoverFromPanicLogs(veleroNamespace string, panicReason interface{}, panic
 
 func BackupErrorLogs(ocClient client.Client, backup velero.Backup) []string {
 	bl := BackupLogs(ocClient, backup)
-	errorRegex, err := regexp.Compile("error|Error")
-	if err != nil {
-		return []string{"could not compile regex: ", err.Error()}
-	}
-	logLines := []string{}
-	for _, line := range strings.Split(bl, "\n") {
-		if errorRegex.MatchString(line) {
-			// ignore some expected errors
-			ignoreLine := false
-			for _, ignore := range errorIgnorePatterns {
-				ignoreLine, _ = regexp.MatchString(ignore, line)
-				if ignoreLine {
-					break
-				}
-			}
-			if !ignoreLine {
-				logLines = append(logLines, line)
-			}
-		}
-	}
-	return logLines
+	return errorLogsExcludingIgnored(bl)
 }
 
 func RestoreErrorLogs(ocClient client.Client, restore velero.Restore) []string {
 	rl := RestoreLogs(ocClient, restore)
+	return errorLogsExcludingIgnored(rl)
+}
+
+func errorLogsExcludingIgnored(logs string) []string {
 	errorRegex, err := regexp.Compile("error|Error")
 	if err != nil {
 		return []string{"could not compile regex: ", err.Error()}
 	}
 	logLines := []string{}
-	for _, line := range strings.Split(rl, "\n") {
+	for _, line := range strings.Split(logs, "\n") {
 		if errorRegex.MatchString(line) {
 			// ignore some expected errors
 			ignoreLine := false

tests/e2e/lib/velero_helpers_test.go

@@ -0,0 +1,37 @@
+package lib
+
+import (
+	"reflect"
+	"testing"
+)
+
+func Test_errorLogsExcludingIgnored(t *testing.T) {
+	type args struct {
+		logs string
+	}
+	tests := []struct {
+		name string
+		args args
+		want []string
+	}{
+		{
+			// sample from https://prow.ci.openshift.org/view/gs/origin-ci-test/pr-logs/pull/openshift_oadp-operator/1126/pull-ci-openshift-oadp-operator-master-4.10-operator-e2e-aws/1690109468546699264#1:build-log.txt%3A686
+			name: "error patch for managed fields are ignored",
+			args: args{
+				logs: `time="2023-08-11T22:02:39Z" level=debug msg="status field for endpointslices.discovery.k8s.io: exists: false, should restore: false" logSource="pkg/restore/restore.go:1487" restore=openshift-adp/mysql-twovol-csi-e2e-76673cb9-3892-11ee-b9ab-0a580a83082d
+time="2023-08-11T22:02:39Z" level=error msg="error patch for managed fields mysql-persistent/mysql-6ztv6: endpointslices.discovery.k8s.io \"mysql-6ztv6\" not found" logSource="pkg/restore/restore.go:1516" restore=openshift-adp/mysql-twovol-csi-e2e-76673cb9-3892-11ee-b9ab-0a580a83082d
+time="2023-08-11T22:02:39Z" level=info msg="Restored 40 items out of an estimated total of 50 (estimate will change throughout the restore)" logSource="pkg/restore/restore.go:669" name=mysql-6ztv6 namespace=mysql-persistent progress= resource=endpointslices.discovery.k8s.io restore=openshift-adp/mysql-twovol-csi-e2e-76673cb9-3892-11ee-b9ab-0a580a83082d
+time="2023-08-11T22:02:39Z" level=info msg="restore status includes excludes: <nil>" logSource="pkg/restore/restore.go:1189" restore=openshift-adp/mysql-twovol-csi-e2e-76673cb9-3892-11ee-b9ab-0a580a83082d
+time="2023-08-11T22:02:39Z" level=debug msg="Skipping action because it does not apply to this resource" logSource="pkg/plugin/framework/action_resolver.go:61" restore=openshift-adp/mysql-twovol-csi-e2e-76673cb9-3892-11ee-b9ab-0a580a83082d`,
+			},
+			want: []string{},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := errorLogsExcludingIgnored(tt.args.logs); !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("errorLogsExcludingIgnored() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}