datadog-otlp

test project sending OpenTelemetry traces in OTLP to datadog-agent

Pre-requisite

• docker
• docker-compose
• a valid datadog api key

Usage

Start

DD_API_KEY=<valid_api_key> make run

Http request

make curl: issues an Http request to the running service.

Default path is /redis/${KEY}.

To override the key for redis: KEY=<my_key> make curl.

To change to a different route: ROUTE=/foo make curl.

Supported routes:

• /
• /ot
• /redis/<key>

Stop

make stop

Diagnose

1. [terminal 0] start the service on.
2. [terminal 1] run make ssh and you're inside datadog-agent container as root.
3. [terminal 1] run apt update && apt install -y net-tools tcpdump
4. [terminal 1] verify connections: netstat -apln
5. [terminal 1] start tcpdump for trace related ports: tcpdump -nnA -s 0 -i any "port 4317 or 5003"
6. [terminal 2] run make curl
7. [terminal 0] observe stdout: a otlp console exporter is active in the pipeline.
8. [terminal 1] observe tcpdump output: 4317 port receives the trace telemetry but not 5003