diff --git a/README.md b/README.md index 4fa88a3..a189963 100644 --- a/README.md +++ b/README.md @@ -10,6 +10,7 @@ This is an overview. You will find more detailed explanations for the components - **[Frontend](./frontend/)** A simple Svelte client application. - **[Tasks API](./backend/tasks/)** The API for interacting with tasks, written in Go, using the Fiber framework. Changes to tasks are published as events to Redis. - **[WebsocketServer](./backend/websocket-server/)** Listens for events in Redis and broadcasts them to all connected Websocket clients. The frontend connects to it by default. +- **[Monitoring & Observability](./observability/)** The Prometheus/Grafana Stack monitors our services and let's us view some nice charts and graphs. ## Services @@ -31,6 +32,7 @@ You can easily run this setup by checking out the repository and run the followi ```sh docker-compose up -d open http://localhost:8000 +open http://grafana.localhost:8000 ``` ```mermaid @@ -47,6 +49,18 @@ graph LR; Redis end + subgraph Observability + Grafana + Prometheus + NodeExporter + MongodbExporter + + Grafana-- :9090 --> Prometheus + Prometheus-- :9100 --> NodeExporter + Prometheus-- :9216 --> MongodbExporter + MongodbExporter --> MongoDB + end + subgraph Backend TasksAPI-- :27017 --> MongoDB TasksAPI-- :6379 --> Redis @@ -57,10 +71,13 @@ graph LR; Traeffik-- :5173 --> Frontend Traeffik-- :3000 --> TasksAPI Traeffik-- :8765 --> WebsocketServer + Traeffik-- :3000 --> Grafana end - User-- :8000 --> Traeffik + User-- localhost:8000 --> Traeffik + + Prometheus-- /metrics --> Traeffik ``` ### Kubernetes with plain YML files diff --git a/backend/tasks/internal/store/mongo.go b/backend/tasks/internal/store/mongo.go index 36760c0..6ae3464 100644 --- a/backend/tasks/internal/store/mongo.go +++ b/backend/tasks/internal/store/mongo.go @@ -11,6 +11,8 @@ import ( "go.mongodb.org/mongo-driver/mongo/options" ) +const CollectionName = "tasks" + type MongoStore struct { database *mongo.Database collection mongo.Collection @@ -30,7 +32,7 @@ func NewMongoDatabase(uri string, database string) (*mongo.Database, error) { } func NewMongoStore(database *mongo.Database) *MongoStore { - collection := database.Collection("tasks") + collection := database.Collection(CollectionName) return &MongoStore{database: database, collection: *collection} } diff --git a/compose.yaml b/compose.yaml index 9a8f189..34b3e37 100644 --- a/compose.yaml +++ b/compose.yaml @@ -2,6 +2,7 @@ include: - apps.compose.yaml - db.compose.yaml - redis.compose.yaml + - monitoring.compose.yaml services: traefik: @@ -12,9 +13,12 @@ services: - "--providers.docker.exposedbydefault=false" - "--entryPoints.web.address=:80" - "--ping.entrypoint=traefik" + - "--metrics.prometheus=true" + - "--metrics.addinternals" restart: always healthcheck: - test: ["CMD-SHELL", "/usr/bin/wget -O- --tries=1 --quiet 127.0.0.1:8080/ping"] + test: + ["CMD-SHELL", "/usr/bin/wget -O- --tries=1 --quiet 127.0.0.1:8080/ping"] start_period: 5s start_interval: 1s ports: diff --git a/db.compose.yaml b/db.compose.yaml index 7eed34b..cdd3164 100644 --- a/db.compose.yaml +++ b/db.compose.yaml @@ -1,11 +1,14 @@ services: mongo: - image: mongo:8.0 + image: mongodb/mongodb-community-server:latest restart: always + environment: + MONGO_INITDB_DATABASE: ict networks: - internal volumes: - mongo_data:/data/db + - ./db/mongodb:/docker-entrypoint-initdb.d volumes: mongo_data: {} diff --git a/db/mongodb/init.js b/db/mongodb/init.js new file mode 100644 index 0000000..af4217a --- /dev/null +++ b/db/mongodb/init.js @@ -0,0 +1,13 @@ +disableTelemetry() +db.setProfilingLevel(2) + +db = db.getSiblingDB("admin"); +db.createUser({ + user: "monitoring", + pwd: "monitoring", + roles: [ + { role: "clusterMonitor", db: "admin" }, + { role: "read", db: "local" }, + { role: "read", db: "ict" } + ] +}); diff --git a/monitoring.compose.yaml b/monitoring.compose.yaml new file mode 100644 index 0000000..0c050ca --- /dev/null +++ b/monitoring.compose.yaml @@ -0,0 +1,73 @@ +--- +services: + grafana: + image: grafana/grafana-oss + restart: unless-stopped + environment: + - GF_SECURITY_ADMIN_USER=admin + - GF_SECURITY_ADMIN_PASSWORD=admin + labels: + - "traefik.enable=true" + - "traefik.http.routers.grafana.rule=Host(`grafana.localhost`)" + - "traefik.http.routers.grafana.entrypoints=web" + - "traefik.http.services.grafana.loadbalancer.server.port=3000" + volumes: + - grafana-storage:/var/lib/grafana + - ./observability/grafana:/etc/grafana/provisioning + - ./observability/grafana/dashboards:/var/lib/grafana/dashboards + networks: + - internal + + prometheus: + image: prom/prometheus + volumes: + - "./observability/prometheus.yml:/etc/prometheus/prometheus.yml" + - prometheus-storage:/prometheus + labels: + - "traefik.enable=true" + - "traefik.http.routers.prometheus.rule=Host(`prometheus.localhost`)" + - "traefik.http.routers.prometheus.entrypoints=web" + - "traefik.http.services.prometheus.loadbalancer.server.port=9090" + networks: + - internal + + node-exporter: + image: quay.io/prometheus/node-exporter:latest + command: + - --path.procfs + - /host/proc + - --path.sysfs + - /host/sys + - --collector.filesystem.ignored-mount-points + - "^/(sys|proc|dev|host|etc)($|/)" + pid: host + restart: unless-stopped + volumes: + - "/proc:/host/proc:ro" + - "/sys:/host/sys:ro" + - "/:/rootfs:ro" + networks: + - internal + + mongodb-exporter: + image: percona/mongodb_exporter:0.40 + command: + - --mongodb.uri=mongodb://monitoring:monitoring@mongo:27017/admin + - --mongodb.collstats-colls=ict.tasks + - --mongodb.indexstats-colls=ict.tasks + - --collect-all + networks: + - internal + + redis-exporter: + image: oliver006/redis_exporter + command: + - --redis.addr=redis://redis + networks: + - internal + ports: + - 9121:9121 + +volumes: + grafana-storage: + prometheus-storage: diff --git a/observability/README.md b/observability/README.md new file mode 100644 index 0000000..ce0160e --- /dev/null +++ b/observability/README.md @@ -0,0 +1,17 @@ +# Monitoring & Observability + +We are running a Grafana/Prometheus stack to get some observability into our setup. This stack also allows us to +monitor our services. + +See the [main Readme](../README.md) on how to get it all set up. + +* **Prometheus**: Collects metrics from different sources and keeps them for a couple of days. +* **Grafana**: Connects to Prometheus and displays its data in nice dashboards and charts. +* **Node Exporter**: Collects metrics from our host. That's either our local machine or the Kubernetes host, depending on the setup. +* **MongoDB Exporter**: Collects metrics from MongoDB. + +## Docker Compose Setup + +After everything is running, visit and log in using `admin` as username and as password. + +You can also directly access Prometheus' UI at . diff --git a/observability/grafana/dashboards/dashboards.yml b/observability/grafana/dashboards/dashboards.yml new file mode 100644 index 0000000..5ed5543 --- /dev/null +++ b/observability/grafana/dashboards/dashboards.yml @@ -0,0 +1,11 @@ +apiVersion: 1 +providers: + - name: "Dashboard Files" + orgId: 1 + type: file + disableDeletion: false + updateIntervalSeconds: 10 + allowUiUpdates: false + options: + path: /var/lib/grafana/dashboards + foldersFromFilesStructure: true diff --git a/observability/grafana/dashboards/mongodb.json b/observability/grafana/dashboards/mongodb.json new file mode 100644 index 0000000..a991ebf --- /dev/null +++ b/observability/grafana/dashboards/mongodb.json 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false, + "name": "service", + "options": [], + "query": { + "query": "label_values(traefik_service_requests_total, service)", + "refId": "StandardVariableQuery" + }, + "refresh": 2, + "regex": "", + "skipUrlSync": false, + "sort": 1, + "type": "query" + } + ] + }, + "time": { + "from": "now-6h", + "to": "now" + }, + "timepicker": {}, + "timezone": "", + "title": "Traefik Official Standalone Dashboard", + "uid": "n5bu_kv45", + "version": 7, + "weekStart": "" +} \ No newline at end of file diff --git a/observability/grafana/datasources/prom.yml b/observability/grafana/datasources/prom.yml new file mode 100644 index 0000000..ec6c611 --- /dev/null +++ b/observability/grafana/datasources/prom.yml @@ -0,0 +1,9 @@ +apiVersion: 1 +datasources: + - name: Prometheus + type: prometheus + access: proxy + orgId: 1 + url: http://prometheus:9090 + isDefault: true + editable: false diff --git a/observability/prometheus.yml b/observability/prometheus.yml new file mode 100644 index 0000000..a806f94 --- /dev/null +++ b/observability/prometheus.yml @@ -0,0 +1,37 @@ +# my global config +global: + scrape_interval: 15s # Set the scrape interval to every 15 seconds. Default is every 1 minute. + evaluation_interval: 15s # Evaluate rules every 15 seconds. The default is every 1 minute. + # scrape_timeout is set to the global default (10s). + +# Alertmanager configuration +alerting: + alertmanagers: + - static_configs: + - targets: + # - alertmanager:9093 + +# Load rules once and periodically evaluate them according to the global 'evaluation_interval'. +rule_files: + # - "first_rules.yml" + # - "second_rules.yml" + +# A scrape configuration containing exactly one endpoint to scrape: +# Here it's Prometheus itself. +scrape_configs: + # The job name is added as a label `job=` to any timeseries scraped from this config. + - job_name: "prometheus" + static_configs: + - targets: ["localhost:9090"] + - job_name: "traefik" + static_configs: + - targets: ["traefik:8080"] + - job_name: "mongodb" + static_configs: + - targets: ["mongodb-exporter:9216"] + - job_name: "node_exporter" + static_configs: + - targets: ["node-exporter:9100"] + - job_name: "redis" + static_configs: + - targets: ["redis-exporter:9121"] diff --git a/redis.compose.yaml b/redis.compose.yaml index 8d5b7e8..24d014e 100644 --- a/redis.compose.yaml +++ b/redis.compose.yaml @@ -7,8 +7,11 @@ x-redis-defaults: &redis-defaults services: redis: <<: *redis-defaults + command: ["redis-server", "--maxmemory", "100mb"] healthcheck: test: ["CMD", "redis-cli", "--raw", "incr", "ping"] + volumes: + - redis-data:/data redis-event-stream: <<: *redis-defaults @@ -16,3 +19,6 @@ services: ["redis-cli", "-u", "redis://redis:6379/0", "PSUBSCRIBE", "events.*"] depends_on: - redis + +volumes: + redis-data: