Add a in container exec based health check.

pkg/health/exec_test.go

@@ -0,0 +1,90 @@
+/*
+Copyright 2014 Google Inc. All rights reserved.
+
+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 health
+
+import (
+	"fmt"
+	"os/exec"
+	"reflect"
+	"testing"
+
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
+)
+
+type FakeExec struct {
+	cmd []string
+	out []byte
+	err error
+}
+
+func (f *FakeExec) RunInContainer(podFullName, container string, cmd []string) ([]byte, error) {
+	f.cmd = cmd
+	return f.out, f.err
+}
+
+type healthCheckTest struct {
+	expectedStatus Status
+	probe          *api.LivenessProbe
+	expectError    bool
+	output         []byte
+	err            error
+}
+
+func TestExec(t *testing.T) {
+	fake := FakeExec{}
+	checker := ExecHealthChecker{&fake}
+	tests := []healthCheckTest{
+		// Missing parameters
+		{Unknown, &api.LivenessProbe{Type: "exec"}, true, nil, nil},
+		// Ok
+		{Healthy, &api.LivenessProbe{
+			Type: "exec",
+			Exec: &api.ExecProbe{Command: []string{"ls", "-l"}},
+		}, false, []byte("OK"), nil},
+		// Run returns error
+		{Unknown, &api.LivenessProbe{
+			Type: "exec",
+			Exec: &api.ExecProbe{
+				Command: []string{"ls", "-l"},
+			},
+		}, true, []byte("OK, NOT"), fmt.Errorf("test error")},
+		// Command error
+		{Unhealthy, &api.LivenessProbe{
+			Type: "exec",
+			Exec: &api.ExecProbe{
+				Command: []string{"ls", "-l"},
+			},
+		}, false, []byte{}, &exec.ExitError{}},
+	}
+	for _, test := range tests {
+		fake.out = test.output
+		fake.err = test.err
+		status, err := checker.HealthCheck("test", api.PodState{}, api.Container{LivenessProbe: test.probe})
+		if status != test.expectedStatus {
+			t.Errorf("expected %v, got %v", test.expectedStatus, status)
+		}
+		if err != nil && test.expectError == false {
+			t.Errorf("unexpected error: %v", err)
+		}
+		if err == nil && test.expectError == true {
+			t.Errorf("unexpected non-error")
+		}
+		if test.probe.Exec != nil && !reflect.DeepEqual(fake.cmd, test.probe.Exec.Command) {
+			t.Errorf("expected: %v, got %v", test.probe.Exec.Command, fake.cmd)
+		}
+	}
+}