Merge pull request #10140 from hashicorp/b-gh-10070

agent: return req error if prometheus metrics are disabled.

api/internal/testutil/server.go

@@ -42,6 +42,7 @@ type TestServerConfig struct {
 	Client            *ClientConfig `json:"client,omitempty"`
 	Vault             *VaultConfig  `json:"vault,omitempty"`
 	ACL               *ACLConfig    `json:"acl,omitempty"`
+	Telemetry         *Telemetry    `json:"telemetry,omitempty"`
 	DevMode           bool          `json:"-"`
 	Stdout, Stderr    io.Writer     `json:"-"`
 }
@@ -90,6 +91,11 @@ type ACLConfig struct {
 	Enabled bool `json:"enabled"`
 }
 
+// Telemetry is used to configure the Nomad telemetry setup.
+type Telemetry struct {
+	PrometheusMetrics bool `json:"prometheus_metrics"`
+}
+
 // ServerConfigCallback is a function interface which can be
 // passed to NewTestServerConfig to modify the server config.
 type ServerConfigCallback func(c *TestServerConfig)

api/operator_metrics_test.go

@@ -3,6 +3,7 @@ package api
 import (
 	"testing"
 
+	"github.com/hashicorp/nomad/api/internal/testutil"
 	"github.com/stretchr/testify/require"
 )
 
@@ -31,7 +32,9 @@ func TestOperator_MetricsSummary(t *testing.T) {
 
 func TestOperator_Metrics_Prometheus(t *testing.T) {
 	t.Parallel()
-	c, s := makeClient(t, nil, nil)
+	c, s := makeClient(t, nil, func(c *testutil.TestServerConfig) {
+		c.Telemetry = &testutil.Telemetry{PrometheusMetrics: true}
+	})
 	defer s.Stop()
 
 	operator := c.Operator()