625 lines
17 KiB
Go
625 lines
17 KiB
Go
package agent
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import (
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"context"
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"crypto/x509"
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"fmt"
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"net/http"
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"net/http/httptest"
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"os"
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"path/filepath"
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"strings"
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"testing"
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"time"
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"github.com/stretchr/testify/require"
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"github.com/hashicorp/consul/agent/rpc/middleware"
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"github.com/hashicorp/consul/lib/retry"
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"github.com/hashicorp/consul/sdk/testutil"
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"github.com/hashicorp/consul/testrpc"
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"github.com/hashicorp/consul/tlsutil"
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)
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func skipIfShortTesting(t *testing.T) {
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if testing.Short() {
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t.Skip("too slow for testing.Short")
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}
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}
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func recordPromMetrics(t *testing.T, a *TestAgent, respRec *httptest.ResponseRecorder) {
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t.Helper()
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req, err := http.NewRequest("GET", "/v1/agent/metrics?format=prometheus", nil)
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require.NoError(t, err, "Failed to generate new http request.")
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_, err = a.srv.AgentMetrics(respRec, req)
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require.NoError(t, err, "Failed to serve agent metrics")
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}
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func assertMetricExists(t *testing.T, respRec *httptest.ResponseRecorder, metric string) {
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if respRec.Body.String() == "" {
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t.Fatalf("Response body is empty.")
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}
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if !strings.Contains(respRec.Body.String(), metric) {
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t.Fatalf("Could not find the metric \"%s\" in the /v1/agent/metrics response", metric)
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}
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}
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// assertMetricExistsWithLabels looks in the prometheus metrics response for the metric name and all the labels. eg:
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// new_rpc_metrics_rpc_server_call{errored="false",method="Status.Ping",request_type="unknown",rpc_type="net/rpc"}
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func assertMetricExistsWithLabels(t *testing.T, respRec *httptest.ResponseRecorder, metric string, labelNames []string) {
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if respRec.Body.String() == "" {
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t.Fatalf("Response body is empty.")
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}
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if !strings.Contains(respRec.Body.String(), metric) {
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t.Fatalf("Could not find the metric \"%s\" in the /v1/agent/metrics response", metric)
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}
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foundAllLabels := false
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metrics := respRec.Body.String()
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for _, line := range strings.Split(metrics, "\n") {
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// skip help lines
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if len(line) < 1 || line[0] == '#' {
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continue
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}
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if strings.Contains(line, metric) {
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hasAllLabels := true
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for _, labelName := range labelNames {
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if !strings.Contains(line, labelName) {
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hasAllLabels = false
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break
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}
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}
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if hasAllLabels {
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foundAllLabels = true
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// done!
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break
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}
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}
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}
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if !foundAllLabels {
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t.Fatalf("Could not verify that all named labels \"%s\" exist for the metric \"%s\" in the /v1/agent/metrics response", strings.Join(labelNames, ", "), metric)
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}
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}
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func assertLabelWithValueForMetricExistsNTime(t *testing.T, respRec *httptest.ResponseRecorder, metric string, label string, labelValue string, occurrences int) {
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if respRec.Body.String() == "" {
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t.Fatalf("Response body is empty.")
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}
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if !strings.Contains(respRec.Body.String(), metric) {
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t.Fatalf("Could not find the metric \"%s\" in the /v1/agent/metrics response", metric)
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}
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metrics := respRec.Body.String()
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// don't look at _sum or _count or other aggregates
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metricTarget := metric + "{"
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// eg method="Status.Ping"
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labelWithValueTarget := label + "=" + "\"" + labelValue + "\""
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matchesFound := 0
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for _, line := range strings.Split(metrics, "\n") {
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// skip help lines
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if len(line) < 1 || line[0] == '#' {
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continue
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}
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if strings.Contains(line, metricTarget) {
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if strings.Contains(line, labelWithValueTarget) {
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matchesFound++
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}
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}
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}
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if matchesFound < occurrences {
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t.Fatalf("Only found metric \"%s\" %d times. Wanted %d times.", metric, matchesFound, occurrences)
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}
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}
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func assertMetricExistsWithValue(t *testing.T, respRec *httptest.ResponseRecorder, metric string, value string) {
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if respRec.Body.String() == "" {
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t.Fatalf("Response body is empty.")
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}
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// eg "consul_autopilot_healthy NaN"
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target := metric + " " + value
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if !strings.Contains(respRec.Body.String(), target) {
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t.Fatalf("Could not find the metric \"%s\" with value \"%s\" in the /v1/agent/metrics response", metric, value)
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}
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}
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func assertMetricsWithLabelIsNonZero(t *testing.T, respRec *httptest.ResponseRecorder, label, labelValue string) {
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if respRec.Body.String() == "" {
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t.Fatalf("Response body is empty.")
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}
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metrics := respRec.Body.String()
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labelWithValueTarget := label + "=" + "\"" + labelValue + "\""
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for _, line := range strings.Split(metrics, "\n") {
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if len(line) < 1 || line[0] == '#' {
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continue
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}
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if strings.Contains(line, labelWithValueTarget) {
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s := strings.SplitN(line, " ", 2)
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if s[1] == "0" {
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t.Fatalf("Metric with label provided \"%s:%s\" has the value 0", label, labelValue)
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}
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}
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}
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}
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func assertMetricNotExists(t *testing.T, respRec *httptest.ResponseRecorder, metric string) {
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if respRec.Body.String() == "" {
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t.Fatalf("Response body is empty.")
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}
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if strings.Contains(respRec.Body.String(), metric) {
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t.Fatalf("Didn't expect to find the metric \"%s\" in the /v1/agent/metrics response", metric)
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}
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}
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// TestAgent_OneTwelveRPCMetrics test for the 1.12 style RPC metrics. These are the labeled metrics coming from
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// agent.rpc.middleware.interceptors package.
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func TestAgent_OneTwelveRPCMetrics(t *testing.T) {
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skipIfShortTesting(t)
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// This test cannot use t.Parallel() since we modify global state, ie the global metrics instance
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t.Run("Check that 1.12 rpc metrics are not emitted by default.", func(t *testing.T) {
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metricsPrefix := "new_rpc_metrics"
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hcl := fmt.Sprintf(`
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telemetry = {
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prometheus_retention_time = "5s"
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disable_hostname = true
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metrics_prefix = "%s"
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}
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`, metricsPrefix)
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a := StartTestAgent(t, TestAgent{HCL: hcl})
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defer a.Shutdown()
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var out struct{}
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err := a.RPC(context.Background(), "Status.Ping", struct{}{}, &out)
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require.NoError(t, err)
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respRec := httptest.NewRecorder()
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recordPromMetrics(t, a, respRec)
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assertMetricNotExists(t, respRec, metricsPrefix+"_rpc_server_call")
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})
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t.Run("Check that 1.12 rpc metrics are emitted when specified by operator.", func(t *testing.T) {
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metricsPrefix := "new_rpc_metrics_2"
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allowRPCMetricRule := metricsPrefix + "." + strings.Join(middleware.OneTwelveRPCSummary[0].Name, ".")
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hcl := fmt.Sprintf(`
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telemetry = {
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prometheus_retention_time = "5s"
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disable_hostname = true
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metrics_prefix = "%s"
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prefix_filter = ["+%s"]
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}
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`, metricsPrefix, allowRPCMetricRule)
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a := StartTestAgent(t, TestAgent{HCL: hcl})
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defer a.Shutdown()
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var out struct{}
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err := a.RPC(context.Background(), "Status.Ping", struct{}{}, &out)
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require.NoError(t, err)
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err = a.RPC(context.Background(), "Status.Ping", struct{}{}, &out)
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require.NoError(t, err)
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err = a.RPC(context.Background(), "Status.Ping", struct{}{}, &out)
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require.NoError(t, err)
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respRec := httptest.NewRecorder()
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recordPromMetrics(t, a, respRec)
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// make sure the labels exist for this metric
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assertMetricExistsWithLabels(t, respRec, metricsPrefix+"_rpc_server_call", []string{"errored", "method", "request_type", "rpc_type", "leader"})
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// make sure we see 3 Status.Ping metrics corresponding to the calls we made above
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assertLabelWithValueForMetricExistsNTime(t, respRec, metricsPrefix+"_rpc_server_call", "method", "Status.Ping", 3)
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// make sure rpc calls with elapsed time below 1ms are reported as decimal
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assertMetricsWithLabelIsNonZero(t, respRec, "method", "Status.Ping")
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})
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}
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func TestHTTPHandlers_AgentMetrics_LeaderShipMetrics(t *testing.T) {
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skipIfShortTesting(t)
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// This test cannot use t.Parallel() since we modify global state, ie the global metrics instance
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t.Run("check that metric isLeader is set properly on server", func(t *testing.T) {
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hcl := `
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telemetry = {
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prometheus_retention_time = "5s",
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metrics_prefix = "agent_is_leader"
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}
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`
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a := StartTestAgent(t, TestAgent{HCL: hcl})
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defer a.Shutdown()
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retryWithBackoff := func(expectedStr string) error {
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waiter := &retry.Waiter{
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MaxWait: 1 * time.Minute,
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}
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ctx := context.Background()
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for {
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if waiter.Failures() > 7 {
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return fmt.Errorf("reach max failure: %d", waiter.Failures())
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}
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respRec := httptest.NewRecorder()
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recordPromMetrics(t, a, respRec)
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out := respRec.Body.String()
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if strings.Contains(out, expectedStr) {
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return nil
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}
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waiter.Wait(ctx)
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}
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}
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// agent hasn't become a leader
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err := retryWithBackoff("isLeader 0")
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require.NoError(t, err, "non-leader server should have isLeader 0")
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testrpc.WaitForLeader(t, a.RPC, "dc1")
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// Verify agent's isLeader metrics is 1
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err = retryWithBackoff("isLeader 1")
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require.NoError(t, err, "leader should have isLeader 1")
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})
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}
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// TestHTTPHandlers_AgentMetrics_ConsulAutopilot_Prometheus adds testing around
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// the published autopilot metrics on https://www.consul.io/docs/agent/telemetry#autopilot
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func TestHTTPHandlers_AgentMetrics_ConsulAutopilot_Prometheus(t *testing.T) {
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skipIfShortTesting(t)
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// This test cannot use t.Parallel() since we modify global state, ie the global metrics instance
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t.Run("Check consul_autopilot_* are not emitted metrics on clients", func(t *testing.T) {
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hcl := `
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telemetry = {
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prometheus_retention_time = "5s"
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disable_hostname = true
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metrics_prefix = "agent_1"
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}
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bootstrap = false
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server = false
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`
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a := StartTestAgent(t, TestAgent{HCL: hcl})
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defer a.Shutdown()
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respRec := httptest.NewRecorder()
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recordPromMetrics(t, a, respRec)
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assertMetricNotExists(t, respRec, "agent_1_autopilot_healthy")
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assertMetricNotExists(t, respRec, "agent_1_autopilot_failure_tolerance")
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})
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t.Run("Check consul_autopilot_healthy metric value on startup", func(t *testing.T) {
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// don't bootstrap agent so as not to
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// become a leader
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hcl := `
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telemetry = {
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prometheus_retention_time = "5s",
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disable_hostname = true
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metrics_prefix = "agent_2"
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}
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bootstrap = false
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`
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a := StartTestAgent(t, TestAgent{HCL: hcl})
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defer a.Shutdown()
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respRec := httptest.NewRecorder()
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recordPromMetrics(t, a, respRec)
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assertMetricExistsWithValue(t, respRec, "agent_2_autopilot_healthy", "1")
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assertMetricExistsWithValue(t, respRec, "agent_2_autopilot_failure_tolerance", "0")
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})
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}
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func TestHTTPHandlers_AgentMetrics_TLSCertExpiry_Prometheus(t *testing.T) {
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skipIfShortTesting(t)
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// This test cannot use t.Parallel() since we modify global state, ie the global metrics instance
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dir := testutil.TempDir(t, "ca")
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caPEM, caPK, err := tlsutil.GenerateCA(tlsutil.CAOpts{Days: 20, Domain: "consul"})
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require.NoError(t, err)
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caPath := filepath.Join(dir, "ca.pem")
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err = os.WriteFile(caPath, []byte(caPEM), 0600)
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require.NoError(t, err)
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signer, err := tlsutil.ParseSigner(caPK)
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require.NoError(t, err)
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pem, key, err := tlsutil.GenerateCert(tlsutil.CertOpts{
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Signer: signer,
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CA: caPEM,
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Name: "server.dc1.consul",
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Days: 20,
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ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth},
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})
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require.NoError(t, err)
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certPath := filepath.Join(dir, "cert.pem")
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err = os.WriteFile(certPath, []byte(pem), 0600)
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require.NoError(t, err)
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keyPath := filepath.Join(dir, "cert.key")
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err = os.WriteFile(keyPath, []byte(key), 0600)
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require.NoError(t, err)
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hcl := fmt.Sprintf(`
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telemetry = {
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prometheus_retention_time = "5s",
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disable_hostname = true
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metrics_prefix = "agent_3"
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}
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ca_file = "%s"
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cert_file = "%s"
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key_file = "%s"
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`, caPath, certPath, keyPath)
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a := StartTestAgent(t, TestAgent{HCL: hcl})
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defer a.Shutdown()
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respRec := httptest.NewRecorder()
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recordPromMetrics(t, a, respRec)
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require.Contains(t, respRec.Body.String(), "agent_3_agent_tls_cert_expiry 1.7")
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}
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func TestHTTPHandlers_AgentMetrics_CACertExpiry_Prometheus(t *testing.T) {
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skipIfShortTesting(t)
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// This test cannot use t.Parallel() since we modify global state, ie the global metrics instance
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t.Run("non-leader emits NaN", func(t *testing.T) {
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hcl := `
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telemetry = {
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prometheus_retention_time = "5s",
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disable_hostname = true
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metrics_prefix = "agent_4"
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}
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connect {
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enabled = true
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}
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bootstrap = false
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`
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a := StartTestAgent(t, TestAgent{HCL: hcl})
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defer a.Shutdown()
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respRec := httptest.NewRecorder()
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recordPromMetrics(t, a, respRec)
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require.Contains(t, respRec.Body.String(), "agent_4_mesh_active_root_ca_expiry NaN")
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require.Contains(t, respRec.Body.String(), "agent_4_mesh_active_signing_ca_expiry NaN")
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})
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t.Run("leader emits a value", func(t *testing.T) {
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hcl := `
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telemetry = {
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prometheus_retention_time = "5s",
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disable_hostname = true
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metrics_prefix = "agent_5"
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}
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connect {
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enabled = true
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}
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`
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a := StartTestAgent(t, TestAgent{HCL: hcl})
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defer a.Shutdown()
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testrpc.WaitForLeader(t, a.RPC, "dc1")
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respRec := httptest.NewRecorder()
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recordPromMetrics(t, a, respRec)
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out := respRec.Body.String()
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require.Contains(t, out, "agent_5_mesh_active_root_ca_expiry 3.15")
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require.Contains(t, out, "agent_5_mesh_active_signing_ca_expiry 3.15")
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})
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}
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func TestHTTPHandlers_AgentMetrics_WAL_Prometheus(t *testing.T) {
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skipIfShortTesting(t)
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// This test cannot use t.Parallel() since we modify global state, ie the global metrics instance
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t.Run("client agent emits nothing", func(t *testing.T) {
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hcl := `
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server = false
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telemetry = {
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prometheus_retention_time = "5s",
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disable_hostname = true
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metrics_prefix = "agent_4"
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}
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raft_logstore {
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backend = "wal"
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}
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bootstrap = false
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`
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a := StartTestAgent(t, TestAgent{HCL: hcl})
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defer a.Shutdown()
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respRec := httptest.NewRecorder()
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recordPromMetrics(t, a, respRec)
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require.NotContains(t, respRec.Body.String(), "agent_4_raft_wal")
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})
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t.Run("server with WAL enabled emits WAL metrics", func(t *testing.T) {
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hcl := `
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server = true
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bootstrap = true
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telemetry = {
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prometheus_retention_time = "5s",
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disable_hostname = true
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metrics_prefix = "agent_5"
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}
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connect {
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enabled = true
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}
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raft_logstore {
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backend = "wal"
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}
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`
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a := StartTestAgent(t, TestAgent{HCL: hcl})
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defer a.Shutdown()
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testrpc.WaitForLeader(t, a.RPC, "dc1")
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respRec := httptest.NewRecorder()
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recordPromMetrics(t, a, respRec)
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out := respRec.Body.String()
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require.Contains(t, out, "agent_5_raft_wal_head_truncations")
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require.Contains(t, out, "agent_5_raft_wal_last_segment_age_seconds")
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require.Contains(t, out, "agent_5_raft_wal_log_appends")
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require.Contains(t, out, "agent_5_raft_wal_log_entries_read")
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require.Contains(t, out, "agent_5_raft_wal_log_entries_written")
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require.Contains(t, out, "agent_5_raft_wal_log_entry_bytes_read")
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require.Contains(t, out, "agent_5_raft_wal_log_entry_bytes_written")
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require.Contains(t, out, "agent_5_raft_wal_segment_rotations")
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require.Contains(t, out, "agent_5_raft_wal_stable_gets")
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require.Contains(t, out, "agent_5_raft_wal_stable_sets")
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require.Contains(t, out, "agent_5_raft_wal_tail_truncations")
|
|
})
|
|
|
|
t.Run("server without WAL enabled emits no WAL metrics", func(t *testing.T) {
|
|
hcl := `
|
|
server = true
|
|
bootstrap = true
|
|
telemetry = {
|
|
prometheus_retention_time = "5s",
|
|
disable_hostname = true
|
|
metrics_prefix = "agent_6"
|
|
}
|
|
connect {
|
|
enabled = true
|
|
}
|
|
raft_logstore {
|
|
backend = "boltdb"
|
|
}
|
|
`
|
|
|
|
a := StartTestAgent(t, TestAgent{HCL: hcl})
|
|
defer a.Shutdown()
|
|
testrpc.WaitForLeader(t, a.RPC, "dc1")
|
|
|
|
respRec := httptest.NewRecorder()
|
|
recordPromMetrics(t, a, respRec)
|
|
|
|
require.NotContains(t, respRec.Body.String(), "agent_6_raft_wal")
|
|
})
|
|
|
|
}
|
|
|
|
func TestHTTPHandlers_AgentMetrics_LogVerifier_Prometheus(t *testing.T) {
|
|
skipIfShortTesting(t)
|
|
// This test cannot use t.Parallel() since we modify global state, ie the global metrics instance
|
|
|
|
t.Run("client agent emits nothing", func(t *testing.T) {
|
|
hcl := `
|
|
server = false
|
|
telemetry = {
|
|
prometheus_retention_time = "5s",
|
|
disable_hostname = true
|
|
metrics_prefix = "agent_4"
|
|
}
|
|
raft_logstore {
|
|
verification {
|
|
enabled = true
|
|
interval = "1s"
|
|
}
|
|
}
|
|
bootstrap = false
|
|
`
|
|
|
|
a := StartTestAgent(t, TestAgent{HCL: hcl})
|
|
defer a.Shutdown()
|
|
|
|
respRec := httptest.NewRecorder()
|
|
recordPromMetrics(t, a, respRec)
|
|
|
|
require.NotContains(t, respRec.Body.String(), "agent_4_raft_logstore_verifier")
|
|
})
|
|
|
|
t.Run("server with verifier enabled emits all metrics", func(t *testing.T) {
|
|
hcl := `
|
|
server = true
|
|
bootstrap = true
|
|
telemetry = {
|
|
prometheus_retention_time = "5s",
|
|
disable_hostname = true
|
|
metrics_prefix = "agent_5"
|
|
}
|
|
connect {
|
|
enabled = true
|
|
}
|
|
raft_logstore {
|
|
verification {
|
|
enabled = true
|
|
interval = "1s"
|
|
}
|
|
}
|
|
`
|
|
|
|
a := StartTestAgent(t, TestAgent{HCL: hcl})
|
|
defer a.Shutdown()
|
|
testrpc.WaitForLeader(t, a.RPC, "dc1")
|
|
|
|
respRec := httptest.NewRecorder()
|
|
recordPromMetrics(t, a, respRec)
|
|
|
|
out := respRec.Body.String()
|
|
require.Contains(t, out, "agent_5_raft_logstore_verifier_checkpoints_written")
|
|
require.Contains(t, out, "agent_5_raft_logstore_verifier_dropped_reports")
|
|
require.Contains(t, out, "agent_5_raft_logstore_verifier_ranges_verified")
|
|
require.Contains(t, out, "agent_5_raft_logstore_verifier_read_checksum_failures")
|
|
require.Contains(t, out, "agent_5_raft_logstore_verifier_write_checksum_failures")
|
|
})
|
|
|
|
t.Run("server with verifier disabled emits no extra metrics", func(t *testing.T) {
|
|
hcl := `
|
|
server = true
|
|
bootstrap = true
|
|
telemetry = {
|
|
prometheus_retention_time = "5s",
|
|
disable_hostname = true
|
|
metrics_prefix = "agent_6"
|
|
}
|
|
connect {
|
|
enabled = true
|
|
}
|
|
raft_logstore {
|
|
verification {
|
|
enabled = false
|
|
}
|
|
}
|
|
`
|
|
|
|
a := StartTestAgent(t, TestAgent{HCL: hcl})
|
|
defer a.Shutdown()
|
|
testrpc.WaitForLeader(t, a.RPC, "dc1")
|
|
|
|
respRec := httptest.NewRecorder()
|
|
recordPromMetrics(t, a, respRec)
|
|
|
|
require.NotContains(t, respRec.Body.String(), "agent_6_raft_logstore_verifier")
|
|
})
|
|
|
|
}
|