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doc: add warning for otlp over grpc #15495

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doc: add warning for otlp over grpc #15495

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99a17d8
doc: add warning for otlp over grpc
verysonglaa Jul 30, 2024
ed874f4
add appProtocol to OTLP/gPRC task warning
verysonglaa Aug 7, 2024
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15 changes: 15 additions & 0 deletions content/en/docs/tasks/observability/distributed-tracing/opentelemetry/index.md
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Expand Up @@ -54,6 +54,21 @@ spec:
EOF
{{< /text >}}

{{< warning >}}
To actually receive traces, make sure your OpenTelemetry Collector service's gRPC port starts with the `grpc-` prefix, which is like:

{{< text syntax=yaml >}}
spec:
ports:
- name: grpc-otlp
port: 4317
protocol: TCP
targetPort: 4317
{{< /text >}}

Otherwise the traces may not be reported.
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{{< /warning >}}

### Exporting via HTTP

In this example, traces will be exported via OTLP/HTTP to the OpenTelemetry Collector.
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9 changes: 9 additions & 0 deletions content/en/docs/tasks/observability/distributed-tracing/opentelemetry/snips.sh
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Expand Up @@ -22,6 +22,15 @@
source "content/en/boilerplates/snips/start-otel-collector-service.sh"
source "content/en/boilerplates/snips/trace-generation.sh"

! IFS=$'\n' read -r -d '' snip_exporting_via_grpc_2 <<\ENDSNIP
spec:
ports:
- name: grpc-otlp
port: 4317
protocol: TCP
targetPort: 4317
ENDSNIP

snip_install_otlp_http() {
cat <<EOF | istioctl install --set values.pilot.env.PILOT_ENABLE_CONFIG_DISTRIBUTION_TRACKING=true -y -f -
apiVersion: install.istio.io/v1alpha1
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