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# CSM Observability | ||
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||
This examples shows how to configure CSM Observability for gRPC client and | ||
server applications (configured once per binary), and shows what type of | ||
telemetry data it can produce for certain RPCs with additional CSM Labels. The | ||
gRPC Client accepts configuration from an xDS Control plane as the default | ||
address that it connects to is "xds:///helloworld:50051", but this can be | ||
overridden with the command line flag --server_addr. This can be plugged into | ||
the steps outlined in the CSM Observability User Guide. | ||
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## Try it (locally if overwritten xDS Address) | ||
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``` | ||
go run server/main.go | ||
``` | ||
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``` | ||
go run client/main.go | ||
``` | ||
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Curl to the port where Prometheus exporter is outputting metrics data: | ||
``` | ||
curl localhost:9464/metrics | ||
``` | ||
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# Building | ||
From the grpc-go directory: | ||
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Client: | ||
docker build -t <TAG> -f examples/features/csm_observability/client/Dockerfile . | ||
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Server: | ||
docker build -t <TAG> -f examples/features/csm_observability/server/Dockerfile . | ||
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Note that this example will not work by default, as the client uses an xDS | ||
Scheme and thus needs xDS Resources to connect to the server. Deploy the built | ||
client and server containers within Cloud Service Mesh in order for this example | ||
to work, or overwrite target to point to :<server serving port>. |
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# Copyright 2024 gRPC 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. | ||
|
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# Dockerfile for building the example client. To build the image, run the | ||
# following command from grpc-go directory: | ||
# docker build -t <TAG> -f examples/features/csm_observability/client/Dockerfile . | ||
FROM golang:1.21-alpine as build | ||
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RUN apk --no-cache add curl | ||
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# Make a grpc-go directory and copy the repo into it. | ||
WORKDIR /go/src/grpc-go | ||
COPY . . | ||
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# Build a static binary without cgo so that we can copy just the binary in the | ||
# final image, and can get rid of the Go compiler and gRPC-Go dependencies. | ||
RUN cd examples/features/csm_observability/client && go build -tags osusergo,netgo . | ||
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FROM alpine | ||
RUN apk --no-cache add curl | ||
COPY --from=build /go/src/grpc-go/examples/features/csm_observability/client/client . | ||
ENV GRPC_GO_LOG_VERBOSITY_LEVEL=99 | ||
ENV GRPC_GO_LOG_SEVERITY_LEVEL="info" | ||
ENTRYPOINT ["./client"] |
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/* | ||
* | ||
* Copyright 2024 gRPC 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. | ||
* | ||
*/ | ||
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package main | ||
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import ( | ||
"context" | ||
"flag" | ||
"fmt" | ||
"log" | ||
"net/http" | ||
"time" | ||
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"google.golang.org/grpc" | ||
"google.golang.org/grpc/credentials/insecure" | ||
"google.golang.org/grpc/examples/features/proto/echo" | ||
"google.golang.org/grpc/stats/opentelemetry" | ||
"google.golang.org/grpc/stats/opentelemetry/csm" | ||
_ "google.golang.org/grpc/xds" // To install the xds resolvers and balancers. | ||
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"github.com/prometheus/client_golang/prometheus/promhttp" | ||
"go.opentelemetry.io/otel/exporters/prometheus" | ||
"go.opentelemetry.io/otel/sdk/metric" | ||
) | ||
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var ( | ||
target = flag.String("target", "xds:///helloworld:50051", "the server address to connect to") | ||
prometheusEndpoint = flag.String("prometheus_endpoint", ":9464", "the Prometheus exporter endpoint") | ||
) | ||
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func main() { | ||
flag.Parse() | ||
exporter, err := prometheus.New() | ||
if err != nil { | ||
log.Fatalf("Failed to start prometheus exporter: %v", err) | ||
} | ||
provider := metric.NewMeterProvider(metric.WithReader(exporter)) | ||
go http.ListenAndServe(*prometheusEndpoint, promhttp.Handler()) | ||
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cleanup := csm.EnableObservability(context.Background(), opentelemetry.Options{MetricsOptions: opentelemetry.MetricsOptions{MeterProvider: provider}}) | ||
defer cleanup() | ||
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cc, err := grpc.NewClient(*target, grpc.WithTransportCredentials(insecure.NewCredentials())) | ||
if err != nil { | ||
log.Fatalf("Failed to start NewClient: %v", err) | ||
} | ||
defer cc.Close() | ||
c := echo.NewEchoClient(cc) | ||
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// Make a RPC every second. This should trigger telemetry to be emitted from | ||
// the client and the server. | ||
for { | ||
ctx, cancel := context.WithTimeout(context.Background(), time.Second*5) | ||
r, err := c.UnaryEcho(ctx, &echo.EchoRequest{Message: "this is examples/opentelemetry"}) | ||
if err != nil { | ||
log.Printf("UnaryEcho failed: %v", err) | ||
} | ||
fmt.Println(r) | ||
time.Sleep(time.Second) | ||
cancel() | ||
} | ||
} |
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# Copyright 2024 gRPC 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. | ||
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# Dockerfile for building the example server. To build the image, run the | ||
# following command from grpc-go directory: | ||
# docker build -t <TAG> -f examples/features/csm_observability/server/Dockerfile . | ||
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FROM golang:1.21-alpine as build | ||
RUN apk --no-cache add curl | ||
# Make a grpc-go directory and copy the repo into it. | ||
WORKDIR /go/src/grpc-go | ||
COPY . . | ||
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# Build a static binary without cgo so that we can copy just the binary in the | ||
# final image, and can get rid of the Go compiler and gRPC-Go dependencies. | ||
RUN cd examples/features/csm_observability/server && go build -tags osusergo,netgo . | ||
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FROM alpine | ||
RUN apk --no-cache add curl | ||
COPY --from=build /go/src/grpc-go/examples/features/csm_observability/server/server . | ||
ENV GRPC_GO_LOG_VERBOSITY_LEVEL=99 | ||
ENV GRPC_GO_LOG_SEVERITY_LEVEL="info" | ||
ENTRYPOINT ["./server"] |
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/* | ||
* | ||
* Copyright 2024 gRPC 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. | ||
* | ||
*/ | ||
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package main | ||
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import ( | ||
"context" | ||
"flag" | ||
"fmt" | ||
"log" | ||
"net" | ||
"net/http" | ||
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"google.golang.org/grpc" | ||
pb "google.golang.org/grpc/examples/features/proto/echo" | ||
"google.golang.org/grpc/stats/opentelemetry" | ||
"google.golang.org/grpc/stats/opentelemetry/csm" | ||
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"github.com/prometheus/client_golang/prometheus/promhttp" | ||
"go.opentelemetry.io/otel/exporters/prometheus" | ||
"go.opentelemetry.io/otel/sdk/metric" | ||
) | ||
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var ( | ||
port = flag.String("port", "50051", "the server address to connect to") | ||
prometheusEndpoint = flag.String("prometheus_endpoint", ":9464", "the Prometheus exporter endpoint") | ||
) | ||
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type echoServer struct { | ||
pb.UnimplementedEchoServer | ||
addr string | ||
} | ||
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func (s *echoServer) UnaryEcho(ctx context.Context, req *pb.EchoRequest) (*pb.EchoResponse, error) { | ||
return &pb.EchoResponse{Message: fmt.Sprintf("%s (from %s)", req.Message, s.addr)}, nil | ||
} | ||
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func main() { | ||
flag.Parse() | ||
exporter, err := prometheus.New() | ||
if err != nil { | ||
log.Fatalf("Failed to start prometheus exporter: %v", err) | ||
} | ||
provider := metric.NewMeterProvider(metric.WithReader(exporter)) | ||
go http.ListenAndServe(*prometheusEndpoint, promhttp.Handler()) | ||
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cleanup := csm.EnableObservability(context.Background(), opentelemetry.Options{MetricsOptions: opentelemetry.MetricsOptions{MeterProvider: provider}}) | ||
defer cleanup() | ||
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lis, err := net.Listen("tcp", ":"+*port) | ||
if err != nil { | ||
log.Fatalf("Failed to listen: %v", err) | ||
} | ||
s := grpc.NewServer() | ||
pb.RegisterEchoServer(s, &echoServer{addr: ":" + *port}) | ||
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log.Printf("Serving on %s\n", *port) | ||
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if err := s.Serve(lis); err != nil { | ||
log.Fatalf("Failed to serve: %v", err) | ||
} | ||
} |
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