simon

Observability load testing and simulation, under construction.

Supported platforms: {linux, windows, darwin}-{amd64, arm64, riscv64}

Observability

• Logs
• Metrics
• Traces
• Context propagation
• Profiling
• Health checks
  • Liveness
  • Readiness
  • Other probes

Deployment

• Kubernetes deployment
• Helm chart

Run

Docker

docker run -i -t ghcr.io/go-faster/simon:latest

{"level":"info","ts":1680181590.1318264,"logger":"metrics","caller":"app/metrics.go:286","msg":"No metrics exporter is configured by OTEL_METRICS_EXPORTER"}
{"level":"info","ts":1680181590.134922,"logger":"metrics","caller":"app/metrics.go:319","msg":"No traces exporter is configured by OTEL_TRACES_EXPORTER"}
{"level":"info","ts":1680181590.1362665,"logger":"metrics","caller":"app/metrics.go:356","msg":"Propagators configured","propagators":["tracecontext","baggage"]}
{"level":"info","ts":1680181590.1375117,"logger":"metrics","caller":"app/metrics.go:112","msg":"Registering pprof routes","routes":["profile","symbol","trace","goroutine","heap","threadcreate","block"]}
{"level":"info","ts":1680181590.139126,"logger":"metrics","caller":"app/metrics.go:379","msg":"Metrics initialized","otel.resource":"process.runtime.description=go version go1.20.2 linux/riscv64,process.runtime.name=go,process.runtime.version=go1.20.2,service.name=simon,service.namespace=go-faster,telemetry.sdk.language=go,telemetry.sdk.name=opentelemetry,telemetry.sdk.version=1.14.0","metrics.http.addr":"localhost:9464"}
{"level":"info","ts":1680181590.1406643,"logger":"metrics","caller":"app/metrics.go:62","msg":"Starting metrics server"}
{"level":"info","ts":1680181591.1405013,"caller":"simon/main.go:28","msg":"Hello, world!"}
{"level":"info","ts":1680181592.1402662,"caller":"simon/main.go:28","msg":"Hello, world!"}

Pod

kubectl -n sandbox apply -f _deploy/

Environment variables

See General SDK Configuration for OpenTelemetry.

Name	Description	Example	Default
METRICS_ADDR	Address with metrics and pprof	localhost:9464	To prometheus addr
PPROF_ROUTES	List of enabled pprof routes	cmdline,profile	profile, symbol, trace, goroutine, heap, threadcreate, block
OTEL_LOG_LEVEL	Log level	debug	info
OTEL_EXPORTER_PROMETHEUS_HOST	Host of prometheus addr	0.0.0.0	localhost
OTEL_EXPORTER_PROMETHEUS_PORT	Port of prometheus addr	9090	9464
OTEL_METRICS_EXPORTER	Metrics exporter to use	prometheus	none
OTEL_TRACES_EXPORTER	Traces exporter to use	jaeger	none
OTEL_EXPORTER_JAEGER_AGENT_HOST	Jaeger exporter host	jaeger.svc.local	localhost
OTEL_EXPORTER_JAEGER_AGENT_PORT	Jaeger exporter port	6831	6831
OTEL_SERVICE_NAME	OTEL Service name	app	unknown_service
OTEL_RESOURCE_ATTRIBUTES	OTEL Resource attributes	service.namespace=pfm
OTEL_PROPAGATORS	OTEL Propagators (only tracecontext and baggage supported, none to disable)	none	tracecontext,baggage

Environment variable	Option	Default value
OTEL_EXPORTER_OTLP_ENDPOINT OTEL_EXPORTER_OTLP_TRACES_ENDPOINT	WithEndpoint WithInsecure	https://localhost:4317 or https://localhost:4318[^1]
OTEL_EXPORTER_OTLP_CERTIFICATE OTEL_EXPORTER_OTLP_TRACES_CERTIFICATE	WithTLSClientConfig
OTEL_EXPORTER_OTLP_HEADERS OTEL_EXPORTER_OTLP_TRACES_HEADERS	WithHeaders
OTEL_EXPORTER_OTLP_COMPRESSION OTEL_EXPORTER_OTLP_TRACES_COMPRESSION	WithCompression
OTEL_EXPORTER_OTLP_TIMEOUT OTEL_EXPORTER_OTLP_TRACES_TIMEOUT	WithTimeout	10s

METRICS_ADDR

Value	METRICS_ADDR
Default	localhost:9464
Description	Address with metrics and pprof
Example	0.0.0.0:9464

PPROF_ROUTES

Value	PPROF_ROUTES
Default	profile, symbol, trace, goroutine, heap, threadcreate, block
Description	List of enabled pprof routes