splitting up services into modules (open-telemetry#872)

* WIP splitting up services

- splits up services into multiple docker files
- experiment with changing service definition for checkout service when kafka is enabled

todo:

[ ] fix checkout service to work without kafka
[ ] fix services that error without feature flag service
[ ] provide noop config for collector when observability backends are
disabled

* send to kafka only if defined

Signed-off-by: Pierre Tessier <pierre@pierretessier.com>

* only check featureflag if env is defined

Signed-off-by: Pierre Tessier <pierre@pierretessier.com>

* split featureflag and kafka services

Signed-off-by: Pierre Tessier <pierre@pierretessier.com>

* remove feature flag env var

* remove extra definitions in test file

* split out observability

Signed-off-by: Pierre Tessier <pierre@pierretessier.com>

* set recommendation resources based on flag

Signed-off-by: Pierre Tessier <pierre@pierretessier.com>

* add start/stop scripts

Signed-off-by: Pierre Tessier <pierre@pierretessier.com>

* split modules

Signed-off-by: Pierre Tessier <pierre@pierretessier.com>

* split into modules

Signed-off-by: Pierre Tessier <pierre@pierretessier.com>

* allows `docker compose up` for full

* default full demo, optional minimal mode

Signed-off-by: Pierre Tessier <pierre@pierretessier.com>

* default full demo, optional minimal mode

Signed-off-by: Pierre Tessier <pierre@pierretessier.com>

---------

Signed-off-by: Pierre Tessier <pierre@pierretessier.com>
Co-authored-by: Pierre Tessier <pierre@pierretessier.com>
Co-authored-by: Austin Parker <austin@ap2.io>

CHANGELOG.md

@@ -45,6 +45,8 @@ release.
   ([#935](https://github.com/open-telemetry/opentelemetry-demo/pull/935))
 * [cartservice] update service to .NET 7
   ([#942](https://github.com/open-telemetry/opentelemetry-demo/pull/942))
+* Introduce minimal mode to run demo
+  ([#872](https://github.com/open-telemetry/opentelemetry-demo/pull/872))
 * [frontendproxy]Envoy expose a route for the collector to route frontend spans
   ([#938](https://github.com/open-telemetry/opentelemetry-demo/pull/938))
 

Makefile

@@ -107,3 +107,30 @@ generate-kubernetes-manifests:
 	echo "# SPDX-License-Identifier: Apache-2.0" >> kubernetes/opentelemetry-demo.yaml
 	echo "# This file is generated by 'make generate-kubernetes-manifests'" >> kubernetes/opentelemetry-demo.yaml
 	helm template opentelemetry-demo open-telemetry/opentelemetry-demo --namespace otel-demo | sed '/helm.sh\/chart\:/d' | sed '/helm.sh\/hook/d' | sed '/managed-by\: Helm/d' >> kubernetes/opentelemetry-demo.yaml
+
+.PHONY: start
+start:
+	docker compose up --force-recreate --remove-orphans --detach
+	@echo ""
+	@echo "OpenTelemetry Demo is running."
+	@echo "Go to http://localhost:8080 for the demo UI."
+	@echo "Go to http://localhost:8080/jaeger/ui for the Jaeger UI."
+	@echo "Go to http://localhost:8080/grafana/ for the Grafana UI."
+	@echo "Go to http://localhost:8080/loadgen/ for the Load Generator UI."
+	@echo "Go to http://localhost:8080/feature/ for the Feature Flag UI."
+
+.PHONY: start-minimal
+start-minimal:
+	docker compose -f docker-compose.minimal.yml up --force-recreate --remove-orphans --detach
+	@echo ""
+	@echo "OpenTelemetry Demo in minimal mode is running."
+	@echo "Go to http://localhost:8080 for the demo UI."
+	@echo "Go to http://localhost:8080/jaeger/ui for the Jaeger UI."
+	@echo "Go to http://localhost:8080/grafana/ for the Grafana UI."
+	@echo "Go to http://localhost:8080/loadgen/ for the Load Generator UI."
+
+.PHONY: stop
+stop:
+	docker compose down --remove-orphans --volumes
+	@echo ""
+	@echo "OpenTelemetry Demo is stopped."