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service_test.go
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service_test.go
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// Copyright The OpenTelemetry Authors
//
// 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 service
import (
"context"
"fmt"
"net/http"
"path/filepath"
"sync"
"testing"
"time"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"go.opentelemetry.io/collector/component"
"go.opentelemetry.io/collector/component/componenttest"
"go.opentelemetry.io/collector/featuregate"
)
func TestService_GetFactory(t *testing.T) {
factories, err := componenttest.NopFactories()
require.NoError(t, err)
srv := createExampleService(t, factories)
assert.NoError(t, srv.Start(context.Background()))
t.Cleanup(func() {
assert.NoError(t, srv.Shutdown(context.Background()))
})
assert.Nil(t, srv.host.GetFactory(component.KindReceiver, "wrongtype"))
assert.Equal(t, factories.Receivers["nop"], srv.host.GetFactory(component.KindReceiver, "nop"))
assert.Nil(t, srv.host.GetFactory(component.KindProcessor, "wrongtype"))
assert.Equal(t, factories.Processors["nop"], srv.host.GetFactory(component.KindProcessor, "nop"))
assert.Nil(t, srv.host.GetFactory(component.KindExporter, "wrongtype"))
assert.Equal(t, factories.Exporters["nop"], srv.host.GetFactory(component.KindExporter, "nop"))
assert.Nil(t, srv.host.GetFactory(component.KindExtension, "wrongtype"))
assert.Equal(t, factories.Extensions["nop"], srv.host.GetFactory(component.KindExtension, "nop"))
// Try retrieve non existing component.Kind.
assert.Nil(t, srv.host.GetFactory(42, "nop"))
}
func TestServiceGetExtensions(t *testing.T) {
factories, err := componenttest.NopFactories()
require.NoError(t, err)
srv := createExampleService(t, factories)
assert.NoError(t, srv.Start(context.Background()))
t.Cleanup(func() {
assert.NoError(t, srv.Shutdown(context.Background()))
})
extMap := srv.host.GetExtensions()
assert.Len(t, extMap, 1)
assert.Contains(t, extMap, component.NewID("nop"))
}
func TestServiceGetExporters(t *testing.T) {
factories, err := componenttest.NopFactories()
require.NoError(t, err)
srv := createExampleService(t, factories)
assert.NoError(t, srv.Start(context.Background()))
t.Cleanup(func() {
assert.NoError(t, srv.Shutdown(context.Background()))
})
expMap := srv.host.GetExporters()
assert.Len(t, expMap, 3)
assert.Len(t, expMap[component.DataTypeTraces], 1)
assert.Contains(t, expMap[component.DataTypeTraces], component.NewID("nop"))
assert.Len(t, expMap[component.DataTypeMetrics], 1)
assert.Contains(t, expMap[component.DataTypeMetrics], component.NewID("nop"))
assert.Len(t, expMap[component.DataTypeLogs], 1)
assert.Contains(t, expMap[component.DataTypeLogs], component.NewID("nop"))
}
// TestServiceTelemetryCleanupOnError tests that if newService errors due to an invalid config telemetry is cleaned up
// and another service with a valid config can be started right after.
func TestServiceTelemetryCleanupOnError(t *testing.T) {
factories, err := componenttest.NopFactories()
require.NoError(t, err)
// Read invalid yaml config from file
invalidProvider, err := NewConfigProvider(newDefaultConfigProviderSettings([]string{filepath.Join("testdata", "otelcol-invalid.yaml")}))
require.NoError(t, err)
invalidCfg, err := invalidProvider.Get(context.Background(), factories)
require.NoError(t, err)
// Read valid yaml config from file
validProvider, err := NewConfigProvider(newDefaultConfigProviderSettings([]string{filepath.Join("testdata", "otelcol-nop.yaml")}))
require.NoError(t, err)
validCfg, err := validProvider.Get(context.Background(), factories)
require.NoError(t, err)
// Create a service with an invalid config and expect an error
telemetryOne := newColTelemetry(featuregate.NewRegistry())
_, err = newService(&settings{
BuildInfo: component.NewDefaultBuildInfo(),
Factories: factories,
Config: invalidCfg,
telemetry: telemetryOne,
})
require.Error(t, err)
// Create a service with a valid config and expect no error
telemetryTwo := newColTelemetry(featuregate.NewRegistry())
srv, err := newService(&settings{
BuildInfo: component.NewDefaultBuildInfo(),
Factories: factories,
Config: validCfg,
telemetry: telemetryTwo,
})
require.NoError(t, err)
// For safety ensure everything is cleaned up
t.Cleanup(func() {
assert.NoError(t, telemetryOne.shutdown())
assert.NoError(t, telemetryTwo.shutdown())
assert.NoError(t, srv.Shutdown(context.Background()))
})
}
// TestServiceTelemetryReusable tests that a single telemetryInitializer can be reused in multiple services
func TestServiceTelemetryReusable(t *testing.T) {
factories, err := componenttest.NopFactories()
require.NoError(t, err)
// Read valid yaml config from file
validProvider, err := NewConfigProvider(newDefaultConfigProviderSettings([]string{filepath.Join("testdata", "otelcol-nop.yaml")}))
require.NoError(t, err)
validCfg, err := validProvider.Get(context.Background(), factories)
require.NoError(t, err)
// Create a service
telemetry := newColTelemetry(featuregate.NewRegistry())
// For safety ensure everything is cleaned up
t.Cleanup(func() {
assert.NoError(t, telemetry.shutdown())
})
srvOne, err := newService(&settings{
BuildInfo: component.NewDefaultBuildInfo(),
Factories: factories,
Config: validCfg,
telemetry: telemetry,
})
require.NoError(t, err)
// URL of the telemetry service metrics endpoint
telemetryURL := fmt.Sprintf("http://%s/metrics", telemetry.server.Addr)
// Start the service
require.NoError(t, srvOne.Start(context.Background()))
// check telemetry server to ensure we get a response
var resp *http.Response
// #nosec G107
resp, err = http.Get(telemetryURL)
assert.NoError(t, err)
assert.Equal(t, http.StatusOK, resp.StatusCode)
// Shutdown the service
require.NoError(t, srvOne.Shutdown(context.Background()))
// Create a new service with the same telemetry
srvTwo, err := newService(&settings{
BuildInfo: component.NewDefaultBuildInfo(),
Factories: factories,
Config: validCfg,
telemetry: telemetry,
})
require.NoError(t, err)
// Start the new service
require.NoError(t, srvTwo.Start(context.Background()))
// check telemetry server to ensure we get a response
// #nosec G107
resp, err = http.Get(telemetryURL)
assert.NoError(t, err)
assert.Equal(t, http.StatusOK, resp.StatusCode)
// Shutdown the new service
require.NoError(t, srvTwo.Shutdown(context.Background()))
}
func createExampleService(t *testing.T, factories component.Factories) *service {
// Read yaml config from file
prov, err := NewConfigProvider(newDefaultConfigProviderSettings([]string{filepath.Join("testdata", "otelcol-nop.yaml")}))
require.NoError(t, err)
cfg, err := prov.Get(context.Background(), factories)
require.NoError(t, err)
telemetry := newColTelemetry(featuregate.NewRegistry())
srv, err := newService(&settings{
BuildInfo: component.NewDefaultBuildInfo(),
Factories: factories,
Config: cfg,
telemetry: telemetry,
})
require.NoError(t, err)
t.Cleanup(func() {
require.NoError(t, telemetry.shutdown())
})
return srv
}
func TestComponentStatusWatcher(t *testing.T) {
factories, err := componenttest.NopFactories()
require.NoError(t, err)
// Use a processor factory that creates "unhealthy" processor: one that
// always reports StatusError after successful Start.
unhealthyProcessorFactory := componenttest.NewUnhealthyProcessorFactory()
factories.Processors[unhealthyProcessorFactory.Type()] = unhealthyProcessorFactory
// Keep track of all status changes in a map.
changedComponents := map[component.StatusSource]component.Status{}
var mux sync.Mutex
onStatusChanged := func(source component.StatusSource, event *component.StatusEvent) {
mux.Lock()
defer mux.Unlock()
changedComponents[source] = event.Status()
}
// Add a "statuswatcher" extension that will receive notifications when processor
// status changes.
factory := componenttest.NewStatusWatcherExtensionFactory(onStatusChanged)
factories.Extensions[factory.Type()] = factory
// Read config from file. This config uses 4 "unhealthy" processors.
validProvider, err := NewConfigProvider(newDefaultConfigProviderSettings([]string{filepath.Join("testdata", "otelcol-statuswatcher.yaml")}))
require.NoError(t, err)
validCfg, err := validProvider.Get(context.Background(), factories)
require.NoError(t, err)
// Create a service
telemetry := newColTelemetry(featuregate.NewRegistry())
srv, err := newService(&settings{
BuildInfo: component.NewDefaultBuildInfo(),
Factories: factories,
Config: validCfg,
telemetry: telemetry,
})
require.NoError(t, err)
// Start the service.
require.NoError(t, srv.Start(context.Background()))
// The "unhealthy" processors will now begin to asynchronously report StatusError.
// We expect to see these reports.
assert.Eventually(t, func() bool {
mux.Lock()
defer mux.Unlock()
for k, v := range changedComponents {
// All processors must report a status change with the same ID
assert.EqualValues(t, component.NewID(unhealthyProcessorFactory.Type()), k.ID())
// And all must be in StatusError
assert.EqualValues(t, component.StatusError, v)
}
// We have 4 processors with exactly the same ID in otelcol-statuswatcher.yaml
// We must have exactly 4 items in our map. This ensures that the "source" argument
// passed to status change func is unique per instance of source component despite
// components having the same IDs (having same ID for different component instances
// is a normal situation for processors, but also not prohibited for other component types).
return len(changedComponents) == 4
}, time.Second, time.Millisecond*10)
t.Cleanup(func() {
assert.NoError(t, telemetry.shutdown())
assert.NoError(t, srv.Shutdown(context.Background()))
})
}