Imageprovider (#1462)

* [Imageprovider] Create Nginx service to host images, add instrumentation to it

Signed-off-by: krisztian.klucsik <krisztian.klucsik@dynatrace.com>

* add missing OTEL_RESOURCE_ATTRIBUTES flags

* adjust otel config

* fix leading /

---------

Signed-off-by: krisztian.klucsik <krisztian.klucsik@dynatrace.com>
Co-authored-by: Austin Parker <austin@ap2.io>

Author: klucsik

.env

@@ -76,6 +76,10 @@ FRONTEND_HOST=frontend
 ENVOY_PORT=8080
 FRONTEND_PROXY_ADDR=frontend-proxy:${ENVOY_PORT}
 
+# Image Provider
+IMAGE_PROVIDER_HOST=imageprovider
+IMAGE_PROVIDER_PORT=8081
+
 # Load Generator
 LOCUST_WEB_PORT=8089
 LOCUST_USERS=10

CHANGELOG.md

@@ -53,6 +53,8 @@ the release.
   ([#1470](https://github.com/open-telemetry/opentelemetry-demo/pull/1470))
 * [frontend] disable instrumentation-fs library
   ([#1473](https://github.com/open-telemetry/opentelemetry-demo/pull/1473))
+* [Imageprovider] Create Nginx service to host images, add instrumentation to it
+  ([#1462](https://github.com/open-telemetry/opentelemetry-demo/pull/1462))
 
 ## 1.8.0
 

docker-compose.minimal.yml

@@ -228,6 +228,8 @@ services:
         condition: service_started
       otelcol:
         condition: service_started
+      imageprovider:
+        condition: service_started
     logging: *logging
 
   # Frontend Proxy (Envoy)
@@ -256,6 +258,8 @@ services:
       - GRAFANA_SERVICE_HOST
       - JAEGER_SERVICE_PORT
       - JAEGER_SERVICE_HOST
+      - IMAGE_PROVIDER_HOST
+      - IMAGE_PROVIDER_PORT
       - OTEL_COLLECTOR_HOST
       - OTEL_COLLECTOR_PORT_GRPC
       - OTEL_COLLECTOR_PORT_HTTP
@@ -271,6 +275,33 @@ services:
       grafana:
         condition: service_started
 
+  # Imageprovider
+  imageprovider:
+    image: ${IMAGE_NAME}:${DEMO_VERSION}-imageprovider
+    container_name: imageprovider
+    build:
+      context: ./
+      dockerfile: ./src/imageprovider/Dockerfile
+      cache_from:
+        - ${IMAGE_NAME}:${IMAGE_VERSION}-imageprovider
+    deploy:
+      resources:
+        limits:
+          memory: 120M
+    restart: unless-stopped
+    ports:
+      - "${IMAGE_PROVIDER_PORT}"
+    environment:
+      - IMAGE_PROVIDER_PORT
+      - OTEL_COLLECTOR_HOST
+      - OTEL_COLLECTOR_PORT_GRPC
+      - OTEL_SERVICE_NAME=imageprovider
+      - OTEL_RESOURCE_ATTRIBUTES
+    depends_on:
+      otelcol:
+        condition: service_started
+    logging: *logging
+
   # Load Generator
   loadgenerator:
     image: ${IMAGE_NAME}:${DEMO_VERSION}-loadgenerator

docker-compose.yml

@@ -309,6 +309,8 @@ services:
         condition: service_started
       otelcol:
         condition: service_started
+      imageprovider:
+        condition: service_started
     logging: *logging
 
   # Frontend Proxy (Envoy)
@@ -336,6 +338,8 @@ services:
       - JAEGER_SERVICE_PORT
       - JAEGER_SERVICE_HOST
       - OTEL_COLLECTOR_HOST
+      - IMAGE_PROVIDER_HOST
+      - IMAGE_PROVIDER_PORT
       - OTEL_COLLECTOR_PORT_GRPC
       - OTEL_COLLECTOR_PORT_HTTP
       - OTEL_RESOURCE_ATTRIBUTES
@@ -350,6 +354,33 @@ services:
       grafana:
         condition: service_started
 
+  # Imageprovider
+  imageprovider:
+    image: ${IMAGE_NAME}:${DEMO_VERSION}-imageprovider
+    container_name: imageprovider
+    build:
+      context: ./
+      dockerfile: ./src/imageprovider/Dockerfile
+      cache_from:
+        - ${IMAGE_NAME}:${IMAGE_VERSION}-imageprovider
+    deploy:
+      resources:
+        limits:
+          memory: 120M
+    restart: unless-stopped
+    ports:
+      - "${IMAGE_PROVIDER_PORT}"
+    environment:
+      - IMAGE_PROVIDER_PORT
+      - OTEL_COLLECTOR_HOST
+      - OTEL_COLLECTOR_PORT_GRPC
+      - OTEL_SERVICE_NAME=imageprovider
+      - OTEL_RESOURCE_ATTRIBUTES
+    depends_on:
+      otelcol:
+        condition: service_started
+    logging: *logging
+
   # Load Generator
   loadgenerator:
     image: ${IMAGE_NAME}:${DEMO_VERSION}-loadgenerator

src/frontendproxy/envoy.tmpl.yaml

@@ -45,6 +45,8 @@ static_resources:
                           route: { cluster: jaeger }
                         - match: { prefix: "/grafana" }
                           route: { cluster: grafana }
+                        - match: { prefix: "/images/" }
+                          route: { cluster: imageprovider, prefix_rewrite: "/" }
                         - match: { prefix: "/" }
                           route: { cluster: frontend }
                 http_filters:
@@ -94,6 +96,18 @@ static_resources:
                     socket_address:
                       address: ${FRONTEND_HOST}
                       port_value: ${FRONTEND_PORT}
+    - name: imageprovider
+      type: STRICT_DNS
+      lb_policy: ROUND_ROBIN
+      load_assignment:
+        cluster_name: imageprovider
+        endpoints:
+          - lb_endpoints:
+              - endpoint:
+                  address:
+                    socket_address:
+                      address: ${IMAGE_PROVIDER_HOST}
+                      port_value: ${IMAGE_PROVIDER_PORT}
     - name: loadgen
       type: STRICT_DNS
       lb_policy: ROUND_ROBIN

src/imageprovider/Dockerfile

@@ -0,0 +1,23 @@
+# Copyright The OpenTelemetry Authors
+# SPDX-License-Identifier: Apache-2.0
+
+FROM nginx:1.25.3
+
+RUN apt-get update ; apt-get install lsb-release --no-install-recommends --no-install-suggests -y
+
+# This file is needed for nginx-module-otel to be found.
+RUN echo "deb [signed-by=/usr/share/keyrings/nginx-archive-keyring.gpg] http://nginx.org/packages/mainline/debian `lsb_release -cs` nginx" | tee /etc/apt/sources.list.d/nginx.list
+
+RUN apt-get update ; apt-get install nginx-module-otel --no-install-recommends --no-install-suggests -y
+
+RUN mkdir /static
+COPY src/imageprovider/static /static
+
+EXPOSE ${IMAGE_PROVIDER_PORT}
+
+STOPSIGNAL SIGQUIT
+
+COPY src/imageprovider/nginx.conf.template /nginx.conf.template
+
+# Start nginx
+CMD ["/bin/sh" , "-c" , "envsubst '$OTEL_COLLECTOR_HOST $IMAGE_PROVIDER_PORT $OTEL_COLLECTOR_PORT_GRPC $OTEL_SERVICE_NAME' < /nginx.conf.template > /etc/nginx/nginx.conf && cat  /etc/nginx/nginx.conf && exec nginx -g 'daemon off;'"]

src/imageprovider/nginx.conf.template

@@ -0,0 +1,32 @@
+load_module modules/ngx_otel_module.so;
+
+events {
+    worker_connections 1024;
+}
+
+http {
+    otel_exporter {
+        endpoint ${OTEL_COLLECTOR_HOST}:${OTEL_COLLECTOR_PORT_GRPC};
+    }
+    otel_trace on;
+    otel_trace_context propagate;
+    otel_service_name ${OTEL_SERVICE_NAME};
+    otel_span_name imageprovider;
+
+
+    include mime.types;
+    sendfile on;
+    server {
+        listen ${IMAGE_PROVIDER_PORT};
+        listen [::]:${IMAGE_PROVIDER_PORT};
+
+        resolver 127.0.0.11;
+        autoindex off;
+
+        server_name _;
+        server_tokens off;
+
+        root /static;
+        gzip_static on;
+    }
+}