Example #1
0
func TestTargetRunScraperScrapes(t *testing.T) {
	testTarget := target{
		state:           Unknown,
		url:             "bad schema",
		httpClient:      utility.NewDeadlineClient(0),
		scraperStopping: make(chan struct{}),
		scraperStopped:  make(chan struct{}),
	}
	go testTarget.RunScraper(nopIngester{}, time.Duration(time.Millisecond))

	// Enough time for a scrape to happen.
	time.Sleep(2 * time.Millisecond)
	if testTarget.lastScrape.IsZero() {
		t.Errorf("Scrape hasn't occured.")
	}

	testTarget.StopScraper()
	// Wait for it to take effect.
	time.Sleep(2 * time.Millisecond)
	last := testTarget.lastScrape
	// Enough time for a scrape to happen.
	time.Sleep(2 * time.Millisecond)
	if testTarget.lastScrape != last {
		t.Errorf("Scrape occured after it was stopped.")
	}
}
Example #2
0
// Construct a new NotificationHandler.
func NewNotificationHandler(alertmanagerUrl string, notificationReqs <-chan NotificationReqs) *NotificationHandler {
	return &NotificationHandler{
		alertmanagerUrl:      alertmanagerUrl,
		pendingNotifications: notificationReqs,
		httpClient:           utility.NewDeadlineClient(*deadline),
	}
}
Example #3
0
func TestTargetScrapeUpdatesState(t *testing.T) {
	testTarget := target{
		state:      Unknown,
		url:        "bad schema",
		httpClient: utility.NewDeadlineClient(0),
	}
	testTarget.scrape(nopIngester{})
	if testTarget.state != Unreachable {
		t.Errorf("Expected target state %v, actual: %v", Unreachable, testTarget.state)
	}
}
Example #4
0
func TestTargetScrapeUpdatesState(t *testing.T) {
	testTarget := target{
		scheduler:  literalScheduler{},
		state:      UNKNOWN,
		address:    "bad schema",
		httpClient: utility.NewDeadlineClient(0),
	}
	testTarget.Scrape(time.Time{}, nopIngester{})
	if testTarget.state != UNREACHABLE {
		t.Errorf("Expected target state %v, actual: %v", UNREACHABLE, testTarget.state)
	}
}
Example #5
0
// NewTarget creates a reasonably configured target for querying.
func NewTarget(url string, deadline time.Duration, baseLabels clientmodel.LabelSet) Target {
	target := &target{
		url:             url,
		Deadline:        deadline,
		baseLabels:      baseLabels,
		httpClient:      utility.NewDeadlineClient(deadline),
		scraperStopping: make(chan struct{}),
		scraperStopped:  make(chan struct{}),
		newBaseLabels:   make(chan clientmodel.LabelSet, 1),
	}

	return target
}
Example #6
0
// Furnish a reasonably configured target for querying.
func NewTarget(address string, deadline time.Duration, baseLabels clientmodel.LabelSet) Target {
	target := &target{
		address:    address,
		Deadline:   deadline,
		baseLabels: baseLabels,
		httpClient: utility.NewDeadlineClient(deadline),
	}

	scheduler := &healthScheduler{
		target: target,
	}
	target.scheduler = scheduler

	return target
}
Example #7
0
func TestTargetRecordScrapeHealth(t *testing.T) {
	testTarget := target{
		url:        "http://example.url",
		baseLabels: clientmodel.LabelSet{clientmodel.JobLabel: "testjob"},
		httpClient: utility.NewDeadlineClient(0),
	}

	now := clientmodel.Now()
	ingester := &collectResultIngester{}
	testTarget.recordScrapeHealth(ingester, now, true, 2*time.Second)

	result := ingester.result

	if len(result) != 2 {
		t.Fatalf("Expected two samples, got %d", len(result))
	}

	actual := result[0]
	expected := &clientmodel.Sample{
		Metric: clientmodel.Metric{
			clientmodel.MetricNameLabel: scrapeHealthMetricName,
			InstanceLabel:               "http://example.url",
			clientmodel.JobLabel:        "testjob",
		},
		Timestamp: now,
		Value:     1,
	}

	if !actual.Equal(expected) {
		t.Fatalf("Expected and actual samples not equal. Expected: %v, actual: %v", expected, actual)
	}

	actual = result[1]
	expected = &clientmodel.Sample{
		Metric: clientmodel.Metric{
			clientmodel.MetricNameLabel: scrapeDurationMetricName,
			InstanceLabel:               "http://example.url",
			clientmodel.JobLabel:        "testjob",
		},
		Timestamp: now,
		Value:     2.0,
	}

	if !actual.Equal(expected) {
		t.Fatalf("Expected and actual samples not equal. Expected: %v, actual: %v", expected, actual)
	}
}
Example #8
0
// NewNotificationHandler constructs a new NotificationHandler.
func NewNotificationHandler(alertmanagerURL string, notificationQueueCapacity int) *NotificationHandler {
	return &NotificationHandler{
		alertmanagerURL:      alertmanagerURL,
		pendingNotifications: make(chan NotificationReqs, notificationQueueCapacity),

		httpClient: utility.NewDeadlineClient(*deadline),

		notificationLatency: prometheus.NewSummary(prometheus.SummaryOpts{
			Namespace: namespace,
			Subsystem: subsystem,
			Name:      "latency_milliseconds",
			Help:      "Latency quantiles for sending alert notifications (not including dropped notifications).",
		}),
		notificationErrors: prometheus.NewCounter(prometheus.CounterOpts{
			Namespace: namespace,
			Subsystem: subsystem,
			Name:      "errors_total",
			Help:      "Total number of errors sending alert notifications.",
		}),
		notificationDropped: prometheus.NewCounter(prometheus.CounterOpts{
			Namespace: namespace,
			Subsystem: subsystem,
			Name:      "dropped_total",
			Help:      "Total number of alert notifications dropped due to alert manager missing in configuration.",
		}),
		notificationsQueueLength: prometheus.NewGauge(prometheus.GaugeOpts{
			Namespace: namespace,
			Subsystem: subsystem,
			Name:      "queue_length",
			Help:      "The number of alert notifications in the queue.",
		}),
		notificationsQueueCapacity: prometheus.MustNewConstMetric(
			prometheus.NewDesc(
				prometheus.BuildFQName(namespace, subsystem, "queue_capacity"),
				"The capacity of the alert notifications queue.",
				nil, nil,
			),
			prometheus.GaugeValue,
			float64(notificationQueueCapacity),
		),
		stopped: make(chan struct{}),
	}
}
Example #9
0
func TestTargetRecordScrapeHealth(t *testing.T) {
	testTarget := target{
		scheduler:  literalScheduler{},
		address:    "http://example.url",
		baseLabels: clientmodel.LabelSet{clientmodel.JobLabel: "testjob"},
		httpClient: utility.NewDeadlineClient(0),
	}

	now := clientmodel.Now()
	ingester := &collectResultIngester{}
	testTarget.recordScrapeHealth(ingester, now, true)

	result := ingester.result

	if len(result.Samples) != 1 {
		t.Fatalf("Expected one sample, got %d", len(result.Samples))
	}

	actual := result.Samples[0]
	expected := &clientmodel.Sample{
		Metric: clientmodel.Metric{
			clientmodel.MetricNameLabel: ScrapeHealthMetricName,
			InstanceLabel:               "http://example.url",
			clientmodel.JobLabel:        "testjob",
		},
		Timestamp: now,
		Value:     1,
	}

	if result.Err != nil {
		t.Fatalf("Got unexpected error: %v", result.Err)
	}

	if !actual.Equal(expected) {
		t.Fatalf("Expected and actual samples not equal. Expected: %v, actual: %v", expected, actual)
	}
}
Example #10
0
// NewClient creates a new Client.
func NewClient(url string, timeout time.Duration) *Client {
	return &Client{
		url:        url,
		httpClient: utility.NewDeadlineClient(timeout),
	}
}