1. Введение
В этой лабораторной работе вы будете использовать gRPC для создания клиента и сервера, которые составят основу приложения для сопоставления маршрутов, написанного на Go.
К концу руководства у вас будет простое приложение gRPC HelloWorld, оснащенное плагином gRPC OpenTelemetry, и вы сможете просматривать экспортированные показатели наблюдаемости в Prometheus.
Чему вы научитесь
- Как настроить плагин OpenTelemetry для существующего приложения gRPC Go
- Запуск локального экземпляра Prometheus
- Экспорт метрик в Prometheus
- Просмотр показателей на панели инструментов Prometheus
2. Прежде чем начать
Что вам понадобится
-
git -
curl -
Goлюбая из двух последних основных версий Go . -
protocv3
Установите необходимые компоненты:
sudo apt-get update -y
sudo apt-get upgrade -y
sudo apt-get install -y git curl
go install google.golang.org/protobuf/cmd/protoc-gen-go@latest
go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@latest
Получить код
Для упрощения обучения эта практическая работа предлагает готовый исходный код, который поможет вам начать работу. Следующие шаги помогут вам настроить плагин gRPC OpenTelemetry в приложении.
grpc-codelabs
Исходный код scaffold для этой лабораторной работы доступен в этом каталоге GitHub. Если вы предпочитаете не реализовывать код самостоятельно, готовый исходный код доступен в каталоге Completed .
Сначала клонируйте репозиторий grpc codelab и перейдите в папку grpc-go-opentelemetry:
git clone https://github.com/grpc-ecosystem/grpc-codelabs.git
cd grpc-codelabs/codelabs/grpc-go-opentelemetry/
Кроме того, вы можете загрузить .zip-файл, содержащий только каталог codelab, и вручную распаковать его.
3. Зарегистрируйте плагин OpenTelemetry.
Для добавления плагина gRPC OpenTelemetry нам понадобится приложение gRPC. В этой лабораторной работе мы будем использовать простой клиент и сервер gRPC HelloWorld, которые будем оснащать плагином gRPC OpenTelemetry.
Настройка инструментария на клиенте
Первый шаг — зарегистрировать плагин OpenTelemetry, настроенный с помощью экспортера Prometheus, в клиенте. Откройте codelabs/grpc-go-opentelemetry/start_here/client/main.go в вашем любимом редакторе и преобразуйте main() , добавив код для настройки плагина gRPC Go Otel.
Создать нового экспортера Prometheus
Следующий фрагмент создает новый экспортер Prometheus.
exporter, err := prometheus.New()
if err != nil {
log.Fatalf("Failed to start prometheus exporter: %v", err)
}
Запустить экспортер Prometheus
Развернуть новую горутину, которая использует net/http для прослушивания и сервера по адресу, переданному флагом prometheus_endpoint
go http.ListenAndServe(*prometheusEndpoint, promhttp.Handler())
Создайте DialOption с плагином OpenTelemetry
Используя метод gRPC Otel DialOption, установите DialOption с помощью поставщика счетчиков Prometheus.
provider := metric.NewMeterProvider(metric.WithReader(exporter))
do := opentelemetry.DialOption(opentelemetry.Options{MetricsOptions: opentelemetry.MetricsOptions{MeterProvider: provider}})
Передайте DialOption при подключении к серверу
do команду gRPC.NewClient
Этот MeterProvider предоставляется плагину OpenTelemetry от gRPC в качестве конфигурации. После глобальной регистрации плагина OpenTelemetry все клиенты и серверы gRPC будут оснащены OpenTelemetry.
Настройка инструментария на сервере
Аналогично добавим плагин OpenTelemetry на сервер. Откройте codelabs/grpc-go-opentelemetry/start_here/server/main.go и напишите код для настройки плагина gRPC Go Otel.
Создать нового экспортера Prometheus
exporter, err := prometheus.New()
if err != nil {
log.Fatalf("Failed to start prometheus exporter: %v", err)
}
Создайте нового поставщика счетчиков с помощью экспортера Prometheus
provider := metric.NewMeterProvider(metric.WithReader(exporter))
go http.ListenAndServe(*prometheusEndpoint, promhttp.Handler())
so := opentelemetry.ServerOption(opentelemetry.Options{MetricsOptions: opentelemetry.MetricsOptions{MeterProvider: provider}})
Передайте этот параметр сервера в gRPC.NewServer
4. Запуск примера и просмотр показателей
Чтобы запустить сервер, выполните -
cd server
go mod tidy
go run .
При успешной настройке вы увидите следующий вывод для сервера:
Serving on :50051
Пока сервер работает, на другом терминале запустите клиент -
cd client
go mod tidy
go run .
Успешный запуск будет выглядеть так:
message:"this is examples/opentelemetry (from :50051)"
message:"this is examples/opentelemetry (from :50051)"
message:"this is examples/opentelemetry (from :50051)"
Поскольку мы настроили плагин gRPC OpenTelemetry для экспорта метрик через Prometheus, эти метрики будут доступны по адресу localhost:9464 для сервера и localhost:9465 для клиента.
Чтобы увидеть показатели клиента -
curl localhost:9465/metrics
Результат будет иметь вид -
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grpc_client_attempt_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="+Inf"} 26
grpc_client_attempt_duration_seconds_sum{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev"} 52.09275054499999
grpc_client_attempt_duration_seconds_count{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev"} 26
# HELP grpc_client_attempt_rcvd_total_compressed_message_size_bytes Compressed message bytes received per call attempt.
# TYPE grpc_client_attempt_rcvd_total_compressed_message_size_bytes histogram
grpc_client_attempt_rcvd_total_compressed_message_size_bytes_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="0"} 0
grpc_client_attempt_rcvd_total_compressed_message_size_bytes_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="1024"} 26
grpc_client_attempt_rcvd_total_compressed_message_size_bytes_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="2048"} 26
grpc_client_attempt_rcvd_total_compressed_message_size_bytes_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="4096"} 26
grpc_client_attempt_rcvd_total_compressed_message_size_bytes_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="16384"} 26
grpc_client_attempt_rcvd_total_compressed_message_size_bytes_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="65536"} 26
grpc_client_attempt_rcvd_total_compressed_message_size_bytes_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="262144"} 26
grpc_client_attempt_rcvd_total_compressed_message_size_bytes_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="1.048576e+06"} 26
grpc_client_attempt_rcvd_total_compressed_message_size_bytes_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="4.194304e+06"} 26
grpc_client_attempt_rcvd_total_compressed_message_size_bytes_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="1.6777216e+07"} 26
grpc_client_attempt_rcvd_total_compressed_message_size_bytes_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="6.7108864e+07"} 26
grpc_client_attempt_rcvd_total_compressed_message_size_bytes_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="2.68435456e+08"} 26
grpc_client_attempt_rcvd_total_compressed_message_size_bytes_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="1.073741824e+09"} 26
grpc_client_attempt_rcvd_total_compressed_message_size_bytes_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="4.294967296e+09"} 26
grpc_client_attempt_rcvd_total_compressed_message_size_bytes_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="+Inf"} 26
grpc_client_attempt_rcvd_total_compressed_message_size_bytes_sum{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev"} 1196
grpc_client_attempt_rcvd_total_compressed_message_size_bytes_count{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev"} 26
# HELP grpc_client_attempt_sent_total_compressed_message_size_bytes Compressed message bytes sent per client call attempt.
# TYPE grpc_client_attempt_sent_total_compressed_message_size_bytes histogram
grpc_client_attempt_sent_total_compressed_message_size_bytes_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="0"} 0
grpc_client_attempt_sent_total_compressed_message_size_bytes_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="1024"} 26
grpc_client_attempt_sent_total_compressed_message_size_bytes_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="2048"} 26
grpc_client_attempt_sent_total_compressed_message_size_bytes_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="4096"} 26
grpc_client_attempt_sent_total_compressed_message_size_bytes_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="16384"} 26
grpc_client_attempt_sent_total_compressed_message_size_bytes_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="65536"} 26
grpc_client_attempt_sent_total_compressed_message_size_bytes_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="262144"} 26
grpc_client_attempt_sent_total_compressed_message_size_bytes_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="1.048576e+06"} 26
grpc_client_attempt_sent_total_compressed_message_size_bytes_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="4.194304e+06"} 26
grpc_client_attempt_sent_total_compressed_message_size_bytes_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="1.6777216e+07"} 26
grpc_client_attempt_sent_total_compressed_message_size_bytes_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="6.7108864e+07"} 26
grpc_client_attempt_sent_total_compressed_message_size_bytes_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="2.68435456e+08"} 26
grpc_client_attempt_sent_total_compressed_message_size_bytes_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="1.073741824e+09"} 26
grpc_client_attempt_sent_total_compressed_message_size_bytes_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="4.294967296e+09"} 26
grpc_client_attempt_sent_total_compressed_message_size_bytes_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="+Inf"} 26
grpc_client_attempt_sent_total_compressed_message_size_bytes_sum{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev"} 832
grpc_client_attempt_sent_total_compressed_message_size_bytes_count{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev"} 26
# HELP grpc_client_attempt_started_total Number of client call attempts started.
# TYPE grpc_client_attempt_started_total counter
grpc_client_attempt_started_total{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev"} 27
# HELP grpc_client_call_duration_seconds Time taken by gRPC to complete an RPC from application's perspective.
# TYPE grpc_client_call_duration_seconds histogram
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="0"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="1e-05"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="5e-05"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="0.0001"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="0.0003"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="0.0006"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="0.0008"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="0.001"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="0.002"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="0.003"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="0.004"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="0.005"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="0.006"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="0.008"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="0.01"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="0.013"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="0.016"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="0.02"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="0.025"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="0.03"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="0.04"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="0.05"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="0.065"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="0.08"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="0.1"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="0.13"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="0.16"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="0.2"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="0.25"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="0.3"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="0.4"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="0.5"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="0.65"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="0.8"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="1"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="2"} 0
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="5"} 26
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="10"} 26
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="20"} 26
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="50"} 26
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="100"} 26
grpc_client_call_duration_seconds_bucket{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev",le="+Inf"} 26
grpc_client_call_duration_seconds_sum{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev"} 52.35282954500001
grpc_client_call_duration_seconds_count{grpc_method="grpc.examples.echo.Echo/UnaryEcho",grpc_status="OK",grpc_target="dns:///:50051",otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev"} 26
# HELP otel_scope_info Instrumentation Scope metadata
# TYPE otel_scope_info gauge
otel_scope_info{otel_scope_name="grpc-go",otel_scope_version="1.67.0-dev"} 1
# HELP promhttp_metric_handler_requests_in_flight Current number of scrapes being served.
# TYPE promhttp_metric_handler_requests_in_flight gauge
promhttp_metric_handler_requests_in_flight 1
# HELP promhttp_metric_handler_requests_total Total number of scrapes by HTTP status code.
# TYPE promhttp_metric_handler_requests_total counter
promhttp_metric_handler_requests_total{code="200"} 1
promhttp_metric_handler_requests_total{code="500"} 0
promhttp_metric_handler_requests_total{code="503"} 0
# HELP target_info Target metadata
# TYPE target_info gauge
target_info{service_name="unknown_service:client",telemetry_sdk_language="go",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="1.28.0"} 1
Аналогично для показателей на стороне сервера -
curl localhost:9464/metrics
5. Просмотр метрик на Prometheus
Здесь мы настроим экземпляр Prometheus, который будет собирать данные с нашего клиента и сервера gRPC, которые экспортируют метрики с помощью Prometheus.
Загрузите последнюю версию Prometheus для вашей платформы, затем извлеките и запустите ее:
tar xvfz prometheus-*.tar.gz
cd prometheus-*
Создайте файл конфигурации Prometheus со следующим содержимым:
cat > grpc_otel_go_prometheus.yml <<EOF
scrape_configs:
- job_name: "prometheus"
scrape_interval: 5s
static_configs:
- targets: ["localhost:9090"]
- job_name: "grpc-otel-go"
scrape_interval: 5s
static_configs:
- targets: ["localhost:9464", "localhost:9465"]
EOF
Запустите Prometheus с новой конфигурацией -
./prometheus --config.file=grpc_otel_go_prometheus.yml
Это позволит настроить считывание показателей из клиентских и серверных процессов кодовой лаборатории каждые 5 секунд.
Чтобы просмотреть метрики, перейдите по адресу http://localhost:9090/graph . Например, запрос:
histogram_quantile(0.5, rate(grpc_client_attempt_duration_seconds_bucket[1m]))
покажет график со средней задержкой попытки, используя 1 минуту в качестве временного окна для расчета квантиля.
Скорость запросов -
increase(grpc_client_attempt_duration_seconds_bucket[1m])
6. (Необязательно) Упражнение для пользователя
На панелях мониторинга Prometheus вы заметите низкий показатель QPS. Попробуйте найти в примере какой-нибудь подозрительный код, который ограничивает QPS.
Для энтузиастов: клиентский код ограничивается только одним ожидающим RPC-запросом в любой момент времени. Это можно изменить, чтобы клиент отправлял больше RPC-запросов, не дожидаясь завершения предыдущих. (Решение этой проблемы пока не предоставлено.)