Open Telemetry and Docker

.dockerignore

@@ -0,0 +1,2 @@
+/*.jar
+/target

.gitignore

@@ -9,7 +9,6 @@ profiles.clj
 .DS_Store
 pom.xml
 pom.xml.asc
-*.jar
 *.class
 /.lein-*
 /.nrepl-port
@@ -19,3 +18,4 @@ pom.xml.asc
 /logs
 /keystore.jks
 /.envrc
+/.envrc-docker

Dockerfile

@@ -7,5 +7,10 @@ RUN lein uberjar
 
 FROM gcr.io/distroless/java17-debian12
 COPY --from=builder /app/target/eduhub-rio-mapper.jar /eduhub-rio-mapper.jar
+COPY --from=builder /app/test/test-clients.json /test-clients.json
+# Make sure there is an opentelemetry agent in the workdir in case docker-compose
+# starts up a process with -javaagent in the JAVA_TOOL_OPTIONS
+COPY --from=builder /app/vendor/opentelemetry-javaagent-2.2.0.jar /opentelemetry-javaagent.jar
 
+WORKDIR /
 ENTRYPOINT ["java", "-jar", "/eduhub-rio-mapper.jar"]

Makefile

@@ -0,0 +1,14 @@
+.PHONY: lint test check clean
+
+lint:
+ clojure -M:lint
+
+test:
+ clojure -M:test
+
+check: lint test
+
+clean:
+ rm -rf classes target
+
+.PHONY: test lint check

dev-infra/prometheus.yml

@@ -0,0 +1,32 @@
+global:
+ scrape_interval: 15s
+ evaluation_interval: 30s
+
+ external_labels:
+ monitor: codelab
+ foo: bar
+
+scrape_configs:
+ - job_name: scrape-static
+
+ honor_labels: true
+ # scrape_interval is defined by the configured global (15s).
+ # scrape_timeout is defined by the global default (10s).
+
+ # metrics_path defaults to '/metrics'
+ # scheme defaults to 'http'.
+ scheme: http
+
+ static_configs:
+ - targets: ["localhost:9090"]
+ labels:
+ service: prometheus
+ - targets: ["worker:9464"]
+ labels:
+ service: worker
+ - targets: ["api:3000"]
+ labels:
+ service: api
+ - targets: ["api:9464"]
+ labels:
+ service: api

docker-compose.yml

@@ -0,0 +1,63 @@
+services:
+ redis:
+ image: redis:7-alpine
+ restart: always
+ ports:
+ - '6380:6379'
+ command: redis-server --save 20 1 --loglevel warning
+ volumes:
+ - redis:/data
+ prometheus:
+ image: prom/prometheus
+ ports:
+ - "9090:9090"
+ volumes:
+ - ./dev-infra/prometheus.yml:/etc/prometheus/prometheus.yml
+ worker:
+ platform: "linux/amd64"
+ build: .
+ env_file:
+ - .envrc # read environment from local direnv settings
+ environment:
+ CLIENTS_INFO_PATH: /test-clients.json
+ REDIS_URI: redis://redis
+ OTEL_METRICS_EXPORTER: prometheus
+ OTEL_EXPORTER_PROMETHEUS_ENDPOINT: http://localhost:9464/metrics
+ OTEL_SERVICE_NAME: edumapper-worker
+ OTEL_LOGS_EXPORTER: none
+ OTEL_TRACES_EXPORTER: none
+ JAVA_TOOL_OPTIONS: -javaagent:./opentelemetry-javaagent.jar
+ volumes:
+ - ./truststore.jks:/truststore.jks
+ - ./keystore.jks:/keystore.jks
+ - ./test/test-clients.json:/test/test-clients.json
+ command: worker
+ ports:
+ - "9465:9464"
+ api:
+ platform: "linux/amd64"
+ build: .
+ env_file:
+ - .envrc # read environment from local direnv settings
+ environment:
+ CLIENTS_INFO_PATH: /test-clients.json
+ REDIS_URI: redis://redis
+ OTEL_METRICS_EXPORTER: prometheus
+ OTEL_EXPORTER_PROMETHEUS_ENDPOINT: http://localhost:9464/metrics
+ OTEL_SERVICE_NAME: edumapper-api
+ OTEL_LOGS_EXPORTER: none
+ OTEL_TRACES_EXPORTER: none
+ JAVA_TOOL_OPTIONS: -javaagent:./opentelemetry-javaagent.jar
+ API_HOSTNAME: 0.0.0.0
+ API_PORT: 3000
+ volumes:
+ - ./truststore.jks:/truststore.jks
+ - ./keystore.jks:/keystore.jks
+ - ./test/test-clients.json:/test/test-clients.json
+ ports:
+ - "3000:3000"
+ - "9464:9464"
+ command: serve-api
+volumes:
+ redis:
+ driver: local