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Merged
merged 3 commits into from
Mar 5, 2025
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Add comment related to L4 load balancer #656

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add comment related to L4 load balancer
rubvs Mar 5, 2025
5c02f25
fix typo
rubvs Mar 5, 2025
b999dfc
Merge branch 'main' into apm-server-L4-load-balacer
rubvs Mar 5, 2025
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2 changes: 2 additions & 0 deletions solutions/observability/apps/upstream-opentelemetry-collectors-language-sdks.md
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Expand Up @@ -262,6 +262,8 @@ Many L7 load balancers handle HTTP and gRPC traffic separately and rely on expli
* Use the `otlp` exporter in the OTel collector. Set annotation `nginx.ingress.kubernetes.io/backend-protocol: "GRPC"` on the K8s Ingress object proxying to APM Server.
* Use the `otlphttp` exporter in the OTel collector. Set annotation `nginx.ingress.kubernetes.io/backend-protocol: "HTTP"` (or `"HTTPS"` if APM Server expects TLS) on the K8s Ingress object proxying to APM Server.

The preferred approach is to deploy a L4 (TCP) load balancer (e.g. [NLB](https://docs.aws.amazon.com/elasticloadbalancing/latest/network/introduction.html) on AWS) in front of APM Server, which forwards raw TCP traffic transparently without protocol inspection.

For more information on how to configure an AWS ALB to support gRPC, see this AWS blog post: [Application Load Balancer Support for End-to-End HTTP/2 and gRPC](https://aws.amazon.com/blogs/aws/new-application-load-balancer-support-for-end-to-end-http-2-and-grpc/).

For more information on how APM Server services gRPC requests, see [Muxing gRPC and HTTP/1.1](https://github.com/elastic/apm-server/blob/main/dev_docs/otel.md#muxing-grpc-and-http11).
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