feat : grafana LGTM sample

boot-grafana-lgtm/.gitignore

@@ -0,0 +1,37 @@
+HELP.md
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/
+
+### Misc ###
+*.log
+.DS_Store

boot-grafana-lgtm/.mvn/wrapper/maven-wrapper.properties

@@ -0,0 +1,18 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.6/apache-maven-3.9.6-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar

boot-grafana-lgtm/ReadMe.md

@@ -0,0 +1,24 @@
+# boot-grafana-lgtm
+
+LGTM stands for Loki, Grafana, Tempo and Mimir. It’s Grafana’s tool stack that enables logs, metrics, and traces to be collected and visualized within a single stack of tools that works in harmony
+
+
+**Grafana**
+
+Grafana is the visualization tool for the whole stack. It allows you to visualize metrics, logs, traces, and many more with its plentiful dashboards and integrations.
+
+**Loki**
+
+Loki is the log aggregator of the LGTM stack. Logs are pushed to Loki, indexed based on given labels and stored within a defined storage. This can be the filesystem, a database (Cassandra, BigTable, DynamoDB), or an object storage. The logs can then be queried from Grafana or through Loki’s API using LogQL, a query language similar to Prometheus’ PromQL.
+
+**Mimir**
+
+ Mimir is the long-term metric storage of the LGTM stack. It receives Prometheus metrics through its Prometheus remote write API and stores them on object storage. Metrics can be queried through Grafana or Mimir’s API using PromQL. Mimir is Prometheus-compatible, meaning that any application using Prometheus APIs can use Mimir without any change in the codebase.
+
+**Tempo**
+
+Tempo is the tracing backend of the LGTM stack. It collects traces in Jaeger, Zipkin, and OpenTelemetry formats. You can then query the traces from Grafana and visualize the path of every request within a distributed system.
+
+**Flow**
+
+![img.png](img.png)

boot-grafana-lgtm/config/prometheus/prometheus.yml

@@ -0,0 +1,17 @@
+global:
+  scrape_interval: 2s
+  evaluation_interval: 2s
+
+scrape_configs:
+  - job_name: 'boot-grafana-lgtm'
+    scrape_interval: 2s
+    metrics_path: '/actuator/prometheus'
+    static_configs:
+      - targets: ['host.docker.internal:8080']
+        labels:
+          application: 'boot-grafana-lgtm'
+  - job_name: 'prometheus'
+    static_configs:
+      - targets: ['host.docker.internal:9090']
+        labels:
+          application: 'prometheus'

boot-grafana-lgtm/docker/docker-compose.yml

@@ -0,0 +1,29 @@
+version: '3.8'
+services:
+
+  grafanalgtm:
+    image: grafana/otel-lgtm:0.5.0
+    extra_hosts: ['host.docker.internal:host-gateway']
+    container_name: grafanalgtm
+    environment:
+      - OTEL_METRIC_EXPORT_INTERVAL=500
+    ports:
+      - "3000:3000"
+      - "4317:4317"
+      - "4318:4318"
+
+  prometheus:
+    image: prom/prometheus:v2.51.1
+    extra_hosts: ['host.docker.internal:host-gateway']
+    container_name: prometheus
+    command:
+      - --enable-feature=exemplar-storage
+      - --config.file=/etc/prometheus/prometheus.yml
+    volumes:
+      - ../config/prometheus/prometheus.yml:/etc/prometheus/prometheus.yml:ro
+    ports:
+      - "9090:9090"
+    healthcheck:
+      interval: 5s
+      retries: 10
+      test: wget --no-verbose --tries=1 --spider http://localhost:9090/status || exit 1