581 lines
15 KiB
Go
581 lines
15 KiB
Go
package healthcheck
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import (
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"context"
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"net/http"
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"net/http/httptest"
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"net/url"
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"sync"
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"testing"
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"time"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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"github.com/traefik/traefik/v2/pkg/config/runtime"
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"github.com/traefik/traefik/v2/pkg/testhelpers"
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"github.com/vulcand/oxy/roundrobin"
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healthpb "google.golang.org/grpc/health/grpc_health_v1"
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)
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const (
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healthCheckInterval = 200 * time.Millisecond
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healthCheckTimeout = 100 * time.Millisecond
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)
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func TestSetBackendsConfiguration(t *testing.T) {
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testCases := []struct {
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desc string
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startHealthy bool
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mode string
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server StartTestServer
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expectedNumRemovedServers int
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expectedNumUpsertedServers int
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expectedGaugeValue float64
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}{
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{
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desc: "healthy server staying healthy",
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startHealthy: true,
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server: newHTTPServer(http.StatusOK),
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expectedNumRemovedServers: 0,
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expectedNumUpsertedServers: 0,
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expectedGaugeValue: 1,
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},
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{
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desc: "healthy server staying healthy (StatusNoContent)",
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startHealthy: true,
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server: newHTTPServer(http.StatusNoContent),
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expectedNumRemovedServers: 0,
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expectedNumUpsertedServers: 0,
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expectedGaugeValue: 1,
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},
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{
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desc: "healthy server staying healthy (StatusPermanentRedirect)",
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startHealthy: true,
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server: newHTTPServer(http.StatusPermanentRedirect),
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expectedNumRemovedServers: 0,
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expectedNumUpsertedServers: 0,
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expectedGaugeValue: 1,
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},
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{
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desc: "healthy server becoming sick",
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startHealthy: true,
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server: newHTTPServer(http.StatusServiceUnavailable),
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expectedNumRemovedServers: 1,
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expectedNumUpsertedServers: 0,
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expectedGaugeValue: 0,
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},
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{
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desc: "sick server becoming healthy",
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startHealthy: false,
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server: newHTTPServer(http.StatusOK),
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expectedNumRemovedServers: 0,
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expectedNumUpsertedServers: 1,
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expectedGaugeValue: 1,
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},
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{
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desc: "sick server staying sick",
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startHealthy: false,
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server: newHTTPServer(http.StatusServiceUnavailable),
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expectedNumRemovedServers: 0,
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expectedNumUpsertedServers: 0,
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expectedGaugeValue: 0,
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},
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{
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desc: "healthy server toggling to sick and back to healthy",
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startHealthy: true,
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server: newHTTPServer(http.StatusServiceUnavailable, http.StatusOK),
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expectedNumRemovedServers: 1,
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expectedNumUpsertedServers: 1,
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expectedGaugeValue: 1,
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},
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{
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desc: "healthy grpc server staying healthy",
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mode: "grpc",
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startHealthy: true,
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server: newGRPCServer(healthpb.HealthCheckResponse_SERVING),
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expectedNumRemovedServers: 0,
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expectedNumUpsertedServers: 0,
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expectedGaugeValue: 1,
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},
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{
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desc: "healthy grpc server becoming sick",
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mode: "grpc",
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startHealthy: true,
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server: newGRPCServer(healthpb.HealthCheckResponse_NOT_SERVING),
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expectedNumRemovedServers: 1,
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expectedNumUpsertedServers: 0,
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expectedGaugeValue: 0,
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},
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{
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desc: "sick grpc server becoming healthy",
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mode: "grpc",
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startHealthy: false,
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server: newGRPCServer(healthpb.HealthCheckResponse_SERVING),
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expectedNumRemovedServers: 0,
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expectedNumUpsertedServers: 1,
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expectedGaugeValue: 1,
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},
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{
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desc: "sick grpc server staying sick",
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mode: "grpc",
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startHealthy: false,
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server: newGRPCServer(healthpb.HealthCheckResponse_NOT_SERVING),
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expectedNumRemovedServers: 0,
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expectedNumUpsertedServers: 0,
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expectedGaugeValue: 0,
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},
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{
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desc: "healthy grpc server toggling to sick and back to healthy",
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mode: "grpc",
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startHealthy: true,
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server: newGRPCServer(healthpb.HealthCheckResponse_NOT_SERVING, healthpb.HealthCheckResponse_SERVING),
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expectedNumRemovedServers: 1,
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expectedNumUpsertedServers: 1,
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expectedGaugeValue: 1,
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},
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}
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for _, test := range testCases {
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test := test
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t.Run(test.desc, func(t *testing.T) {
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t.Parallel()
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// The context is passed to the health check and
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// canonically canceled by the test server once all expected requests have been received.
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ctx, cancel := context.WithCancel(context.Background())
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t.Cleanup(cancel)
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serverURL, timeout := test.server.Start(t, cancel)
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lb := &testLoadBalancer{RWMutex: &sync.RWMutex{}}
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options := Options{
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Mode: test.mode,
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Path: "/path",
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Interval: healthCheckInterval,
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Timeout: healthCheckTimeout,
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LB: lb,
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}
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backend := NewBackendConfig(options, "backendName")
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if test.startHealthy {
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lb.servers = append(lb.servers, serverURL)
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} else {
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backend.disabledURLs = append(backend.disabledURLs, backendURL{url: serverURL, weight: 1})
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}
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collectingMetrics := &testhelpers.CollectingGauge{}
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check := HealthCheck{
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Backends: make(map[string]*BackendConfig),
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metrics: metricsHealthcheck{serverUpGauge: collectingMetrics},
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}
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wg := sync.WaitGroup{}
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wg.Add(1)
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go func() {
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check.execute(ctx, backend)
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wg.Done()
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}()
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select {
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case <-time.After(timeout):
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t.Fatal("test did not complete in time")
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case <-ctx.Done():
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wg.Wait()
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}
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lb.Lock()
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defer lb.Unlock()
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assert.Equal(t, test.expectedNumRemovedServers, lb.numRemovedServers, "removed servers")
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assert.Equal(t, test.expectedNumUpsertedServers, lb.numUpsertedServers, "upserted servers")
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assert.Equal(t, test.expectedGaugeValue, collectingMetrics.GaugeValue, "ServerUp Gauge")
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})
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}
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}
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func TestNewRequest(t *testing.T) {
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type expected struct {
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err bool
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value string
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}
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testCases := []struct {
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desc string
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serverURL string
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options Options
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expected expected
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}{
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{
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desc: "no port override",
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serverURL: "http://backend1:80",
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options: Options{
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Path: "/test",
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Port: 0,
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},
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expected: expected{
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err: false,
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value: "http://backend1:80/test",
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},
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},
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{
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desc: "port override",
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serverURL: "http://backend2:80",
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options: Options{
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Path: "/test",
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Port: 8080,
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},
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expected: expected{
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err: false,
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value: "http://backend2:8080/test",
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},
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},
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{
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desc: "no port override with no port in server URL",
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serverURL: "http://backend1",
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options: Options{
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Path: "/health",
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Port: 0,
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},
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expected: expected{
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err: false,
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value: "http://backend1/health",
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},
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},
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{
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desc: "port override with no port in server URL",
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serverURL: "http://backend2",
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options: Options{
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Path: "/health",
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Port: 8080,
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},
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expected: expected{
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err: false,
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value: "http://backend2:8080/health",
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},
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},
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{
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desc: "scheme override",
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serverURL: "https://backend1:80",
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options: Options{
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Scheme: "http",
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Path: "/test",
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Port: 0,
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},
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expected: expected{
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err: false,
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value: "http://backend1:80/test",
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},
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},
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{
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desc: "path with param",
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serverURL: "http://backend1:80",
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options: Options{
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Path: "/health?powpow=do",
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Port: 0,
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},
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expected: expected{
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err: false,
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value: "http://backend1:80/health?powpow=do",
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},
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},
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{
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desc: "path with params",
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serverURL: "http://backend1:80",
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options: Options{
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Path: "/health?powpow=do&do=powpow",
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Port: 0,
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},
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expected: expected{
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err: false,
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value: "http://backend1:80/health?powpow=do&do=powpow",
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},
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},
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{
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desc: "path with invalid path",
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serverURL: "http://backend1:80",
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options: Options{
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Path: ":",
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Port: 0,
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},
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expected: expected{
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err: true,
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value: "",
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},
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},
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}
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for _, test := range testCases {
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test := test
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t.Run(test.desc, func(t *testing.T) {
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t.Parallel()
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backend := NewBackendConfig(test.options, "backendName")
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u := testhelpers.MustParseURL(test.serverURL)
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req, err := backend.newRequest(u)
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if test.expected.err {
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require.Error(t, err)
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assert.Nil(t, nil)
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} else {
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require.NoError(t, err, "failed to create new backend request")
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require.NotNil(t, req)
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assert.Equal(t, test.expected.value, req.URL.String())
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}
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})
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}
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}
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func TestRequestOptions(t *testing.T) {
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testCases := []struct {
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desc string
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serverURL string
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options Options
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expectedHostname string
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expectedHeader string
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expectedMethod string
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}{
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{
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desc: "override hostname",
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serverURL: "http://backend1:80",
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options: Options{
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Hostname: "myhost",
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Path: "/",
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},
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expectedHostname: "myhost",
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expectedHeader: "",
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expectedMethod: http.MethodGet,
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},
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{
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desc: "not override hostname",
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serverURL: "http://backend1:80",
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options: Options{
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Hostname: "",
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Path: "/",
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},
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expectedHostname: "backend1:80",
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expectedHeader: "",
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expectedMethod: http.MethodGet,
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},
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{
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desc: "custom header",
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serverURL: "http://backend1:80",
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options: Options{
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Headers: map[string]string{"Custom-Header": "foo"},
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Hostname: "",
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Path: "/",
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},
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expectedHostname: "backend1:80",
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expectedHeader: "foo",
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expectedMethod: http.MethodGet,
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},
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{
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desc: "custom header with hostname override",
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serverURL: "http://backend1:80",
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options: Options{
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Headers: map[string]string{"Custom-Header": "foo"},
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Hostname: "myhost",
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Path: "/",
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},
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expectedHostname: "myhost",
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expectedHeader: "foo",
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expectedMethod: http.MethodGet,
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},
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{
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desc: "custom method",
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serverURL: "http://backend1:80",
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options: Options{
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Path: "/",
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Method: http.MethodHead,
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},
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expectedHostname: "backend1:80",
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expectedMethod: http.MethodHead,
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},
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}
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for _, test := range testCases {
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test := test
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t.Run(test.desc, func(t *testing.T) {
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t.Parallel()
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backend := NewBackendConfig(test.options, "backendName")
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u, err := url.Parse(test.serverURL)
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require.NoError(t, err)
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req, err := backend.newRequest(u)
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require.NoError(t, err, "failed to create new backend request")
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req = backend.setRequestOptions(req)
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assert.Equal(t, "http://backend1:80/", req.URL.String())
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assert.Equal(t, test.expectedHostname, req.Host)
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assert.Equal(t, test.expectedHeader, req.Header.Get("Custom-Header"))
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assert.Equal(t, test.expectedMethod, req.Method)
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})
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}
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}
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func TestBalancers_Servers(t *testing.T) {
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server1, err := url.Parse("http://foo.com")
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require.NoError(t, err)
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balancer1, err := roundrobin.New(nil)
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require.NoError(t, err)
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err = balancer1.UpsertServer(server1)
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require.NoError(t, err)
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server2, err := url.Parse("http://foo.com")
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require.NoError(t, err)
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balancer2, err := roundrobin.New(nil)
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require.NoError(t, err)
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err = balancer2.UpsertServer(server2)
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require.NoError(t, err)
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balancers := Balancers([]Balancer{balancer1, balancer2})
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want, err := url.Parse("http://foo.com")
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require.NoError(t, err)
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assert.Equal(t, 1, len(balancers.Servers()))
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assert.Equal(t, want, balancers.Servers()[0])
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}
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func TestBalancers_UpsertServer(t *testing.T) {
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balancer1, err := roundrobin.New(nil)
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require.NoError(t, err)
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balancer2, err := roundrobin.New(nil)
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require.NoError(t, err)
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want, err := url.Parse("http://foo.com")
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require.NoError(t, err)
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balancers := Balancers([]Balancer{balancer1, balancer2})
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err = balancers.UpsertServer(want)
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require.NoError(t, err)
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assert.Equal(t, 1, len(balancer1.Servers()))
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assert.Equal(t, want, balancer1.Servers()[0])
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assert.Equal(t, 1, len(balancer2.Servers()))
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assert.Equal(t, want, balancer2.Servers()[0])
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}
|
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|
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func TestBalancers_RemoveServer(t *testing.T) {
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server, err := url.Parse("http://foo.com")
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require.NoError(t, err)
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balancer1, err := roundrobin.New(nil)
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require.NoError(t, err)
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err = balancer1.UpsertServer(server)
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require.NoError(t, err)
|
|
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balancer2, err := roundrobin.New(nil)
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require.NoError(t, err)
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err = balancer2.UpsertServer(server)
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require.NoError(t, err)
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|
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balancers := Balancers([]Balancer{balancer1, balancer2})
|
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|
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err = balancers.RemoveServer(server)
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require.NoError(t, err)
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|
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assert.Equal(t, 0, len(balancer1.Servers()))
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assert.Equal(t, 0, len(balancer2.Servers()))
|
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}
|
|
|
|
func TestLBStatusUpdater(t *testing.T) {
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lb := &testLoadBalancer{RWMutex: &sync.RWMutex{}}
|
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svInfo := &runtime.ServiceInfo{}
|
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lbsu := NewLBStatusUpdater(lb, svInfo, nil)
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newServer, err := url.Parse("http://foo.com")
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assert.NoError(t, err)
|
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err = lbsu.UpsertServer(newServer, roundrobin.Weight(1))
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assert.NoError(t, err)
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assert.Equal(t, len(lbsu.Servers()), 1)
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assert.Equal(t, len(lbsu.BalancerHandler.(*testLoadBalancer).Options()), 1)
|
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statuses := svInfo.GetAllStatus()
|
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assert.Equal(t, len(statuses), 1)
|
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for k, v := range statuses {
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assert.Equal(t, k, newServer.String())
|
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assert.Equal(t, v, serverUp)
|
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break
|
|
}
|
|
err = lbsu.RemoveServer(newServer)
|
|
assert.NoError(t, err)
|
|
assert.Equal(t, len(lbsu.Servers()), 0)
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statuses = svInfo.GetAllStatus()
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assert.Equal(t, len(statuses), 1)
|
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for k, v := range statuses {
|
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assert.Equal(t, k, newServer.String())
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assert.Equal(t, v, serverDown)
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break
|
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}
|
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}
|
|
|
|
func TestNotFollowingRedirects(t *testing.T) {
|
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redirectServerCalled := false
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redirectTestServer := httptest.NewServer(http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
|
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redirectServerCalled = true
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}))
|
|
defer redirectTestServer.Close()
|
|
|
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ctx, cancel := context.WithCancel(context.Background())
|
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defer cancel()
|
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|
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server := httptest.NewServer(http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
|
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rw.Header().Add("location", redirectTestServer.URL)
|
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rw.WriteHeader(http.StatusSeeOther)
|
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cancel()
|
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}))
|
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defer server.Close()
|
|
|
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lb := &testLoadBalancer{
|
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RWMutex: &sync.RWMutex{},
|
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servers: []*url.URL{testhelpers.MustParseURL(server.URL)},
|
|
}
|
|
|
|
backend := NewBackendConfig(Options{
|
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Path: "/path",
|
|
Interval: healthCheckInterval,
|
|
Timeout: healthCheckTimeout,
|
|
LB: lb,
|
|
FollowRedirects: false,
|
|
}, "backendName")
|
|
|
|
collectingMetrics := &testhelpers.CollectingGauge{}
|
|
check := HealthCheck{
|
|
Backends: make(map[string]*BackendConfig),
|
|
metrics: metricsHealthcheck{serverUpGauge: collectingMetrics},
|
|
}
|
|
|
|
wg := sync.WaitGroup{}
|
|
wg.Add(1)
|
|
|
|
go func() {
|
|
check.execute(ctx, backend)
|
|
wg.Done()
|
|
}()
|
|
|
|
timeout := time.Duration(int(healthCheckInterval) + 500)
|
|
select {
|
|
case <-time.After(timeout):
|
|
t.Fatal("test did not complete in time")
|
|
case <-ctx.Done():
|
|
wg.Wait()
|
|
}
|
|
|
|
assert.False(t, redirectServerCalled, "HTTP redirect must not be followed")
|
|
}
|