util: add health-checker for periodic filesystem checks

Signed-off-by: Niels de Vos <ndevos@ibm.com>

internal/health-checker/manager_test.go

@@ -0,0 +1,85 @@
+/*
+Copyright 2023 ceph-csi authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package healthchecker
+
+import (
+	"testing"
+)
+
+func TestManager(t *testing.T) {
+	t.Parallel()
+
+	volumeID := "fake-volume-id"
+	volumePath := t.TempDir()
+	mgr := NewHealthCheckManager()
+
+	// expected to have an error in msg
+	healthy, msg := mgr.IsHealthy(volumeID, volumePath)
+	if !(healthy && msg != nil) {
+		t.Error("ConditionChecker was not started yet, did not get an error")
+	}
+
+	t.Log("start the checker")
+	err := mgr.StartChecker(volumeID, volumePath, StatCheckerType)
+	if err != nil {
+		t.Fatalf("ConditionChecker could not get started: %v", err)
+	}
+
+	t.Log("check health, should be healthy")
+	healthy, msg = mgr.IsHealthy(volumeID, volumePath)
+	if !healthy || err != nil {
+		t.Errorf("volume is unhealthy: %s", msg)
+	}
+
+	t.Log("stop the checker")
+	mgr.StopChecker(volumeID, volumePath)
+}
+
+func TestSharedChecker(t *testing.T) {
+	t.Parallel()
+
+	volumeID := "fake-volume-id"
+	volumePath := t.TempDir()
+	mgr := NewHealthCheckManager()
+
+	// expected to have an error in msg
+	healthy, msg := mgr.IsHealthy(volumeID, volumePath)
+	if !(healthy && msg != nil) {
+		t.Error("ConditionChecker was not started yet, did not get an error")
+	}
+
+	t.Log("start the checker")
+	err := mgr.StartSharedChecker(volumeID, volumePath, StatCheckerType)
+	if err != nil {
+		t.Fatalf("ConditionChecker could not get started: %v", err)
+	}
+
+	t.Log("check health, should be healthy")
+	healthy, msg = mgr.IsHealthy(volumeID, volumePath)
+	if !healthy || err != nil {
+		t.Errorf("volume is unhealthy: %s", msg)
+	}
+
+	t.Log("check health, should be healthy, path is ignored")
+	healthy, msg = mgr.IsHealthy(volumeID, "different-path")
+	if !healthy || err != nil {
+		t.Errorf("volume is unhealthy: %s", msg)
+	}
+
+	t.Log("stop the checker")
+	mgr.StopSharedChecker(volumeID)
+}