feat(infra): add grafana agent code (#61)

grafana_agent/config/config.river

@@ -0,0 +1,36 @@
+logging {
+    level = "info"
+    format = "logfmt"
+}
+
+otelcol.receiver.otlp "default" {
+    http {
+        endpoint = "0.0.0.0:4318"
+        metrics_url_path = "/v1/metrics"
+    }
+
+    output {
+        metrics  = [otelcol.exporter.prometheus.metric.input]
+	traces   = [otelcol.exporter.otlphttp.trace.input]
+    }
+}
+
+otelcol.exporter.prometheus "metric" {
+    forward_to = [prometheus.remote_write.metric.receiver]
+}
+
+otelcol.exporter.otlphttp "trace" {
+    client {
+        endpoint = "https://grafana.codedang.com/tempo"
+        tls {
+            insecure             = true
+            insecure_skip_verify = true
+        }
+    }
+}
+
+prometheus.remote_write "metric" {
+    endpoint {
+        url = "https://grafana.codedang.com/prometheus/api/v1/write"
+    }
+}

grafana_agent/docker-compose.yml

@@ -0,0 +1,51 @@
+version: '3'
+
+services:
+  # prometheus:
+  #   image: prom/prometheus
+  #   container_name: prometheus
+  #   volumes:
+  #     - ./config/prometheus/prometheus.yml:/etc/prometheus/prometheus.yml
+  #   command:
+  #     - '--config.file=/etc/prometheus/prometheus.yml'
+  #     - '--storage.tsdb.path=/prometheus'
+  #     - --web.enable-remote-write-receiver
+  #   ports:
+  #     - 9090:9090
+
+  agent:
+    image: grafana/agent:latest
+    container_name: agent
+    environment:
+      - AGENT_MODE=flow
+      - HOSTNAME=agent
+    volumes: 
+      - ./config/config.river:/etc/agent/config.river
+    ports:
+      - 12345:12345
+      - 4318:4318   # OTLP over HTTP receiver
+    command: run --server.http.listen-addr=0.0.0.0:12345 /etc/agent/config.river
+
+
+  # otel-collector:
+  #   image: otel/opentelemetry-collector-contrib:0.67.0
+  #   container_name: otel-collector
+  #   command: [ "--config=/etc/otelcol/otelcol-config.yml" ]
+  #   volumes:
+  #     - ./config/otelcol/otelcol-config.yml:/etc/otelcol/otelcol-config.yml
+  #   ports:
+  #     - "4317:4317"     # OTLP over gRPC receiver
+  #     - "4318:4318"     # OTLP over HTTP receiver
+  #     - "8888:8888"   # Prometheus metrics exposed by the collector
+  #     - "8889:8889"   # Prometheus exporter metrics
+
+
+
+  # grafana:
+  #   image: grafana/grafana
+  #   container_name: grafana
+  #   ports:
+  #     - 3000:3000
+
+
+