Rabadan Akagasanov. home work #1

.gitignore

@@ -32,3 +32,4 @@
 
 # Ignore master key for decrypting credentials and more.
 /config/master.key
+.idea

.tool-versions

@@ -0,0 +1 @@
+ruby 3.2.9

Gemfile

@@ -19,6 +19,9 @@ gem "jbuilder"
 
 gem "yabeda-rails"
 gem "yabeda-prometheus"
+gem "lograge"
+gem "redis"
+gem "logster"
 
 # Use Active Model has_secure_password [https://guides.rubyonrails.org/active_model_basics.html#securepassword]
 # gem "bcrypt", "~> 3.1.7"

Gemfile.lock

@@ -146,6 +146,12 @@ GEM
     language_server-protocol (3.17.0.5)
     lint_roller (1.1.0)
     logger (1.7.0)
+    lograge (0.14.0)
+      actionpack (>= 4)
+      activesupport (>= 4)
+      railties (>= 4)
+      request_store (~> 1.0)
+    logster (2.20.1)
     loofah (2.24.1)
       crass (~> 1.0.2)
       nokogiri (>= 1.12.0)
@@ -247,9 +253,15 @@ GEM
       erb
       psych (>= 4.0.0)
       tsort
+    redis (5.4.1)
+      redis-client (>= 0.22.0)
+    redis-client (0.26.1)
+      connection_pool
     regexp_parser (2.11.3)
     reline (0.6.2)
       io-console (~> 0.5)
+    request_store (1.7.0)
+      rack (>= 1.4)
     rexml (3.4.4)
     rubocop (1.81.1)
       json (~> 2.3)
@@ -366,6 +378,7 @@ GEM
 PLATFORMS
   aarch64-linux
   arm64-darwin-24
+  arm64-darwin-25
   x86_64-linux
 
 DEPENDENCIES
@@ -376,9 +389,12 @@ DEPENDENCIES
   importmap-rails
   jbuilder
   kamal
+  lograge
+  logster
   propshaft
   puma (>= 5.0)
   rails (~> 8.0.3)
+  redis
   rubocop-rails-omakase
   selenium-webdriver
   solid_cable

alertmanager/alertmanager.yml

@@ -0,0 +1,48 @@
+global:
+  resolve_timeout: 5m
+
+route:
+  group_by: ['alertname', 'cluster', 'service']
+  group_wait: 10s
+  group_interval: 10s
+  repeat_interval: 12h
+  receiver: 'default-receiver'
+  routes:
+    - match:
+        severity: critical
+      receiver: 'critical-receiver'
+      repeat_interval: 1h
+    - match:
+        severity: warning
+      receiver: 'warning-receiver'
+      repeat_interval: 3h
+
+receivers:
+  - name: 'default-receiver'
+    # Для продакшна здесь можно настроить email, slack, pagerduty и т.д.
+    # Пример с webhook:
+    # webhook_configs:
+    #   - url: 'http://example.com/webhook'
+
+  - name: 'critical-receiver'
+    # Критичные алерты - можно отправлять в Slack, PagerDuty
+    # slack_configs:
+    #   - api_url: 'YOUR_SLACK_WEBHOOK_URL'
+    #     channel: '#alerts-critical'
+    #     title: 'Critical Alert'
+    #     text: '{{ range .Alerts }}{{ .Annotations.summary }}{{ end }}'
+
+  - name: 'warning-receiver'
+    # Предупреждения - можно отправлять в Slack
+    # slack_configs:
+    #   - api_url: 'YOUR_SLACK_WEBHOOK_URL'
+    #     channel: '#alerts-warning'
+    #     title: 'Warning Alert'
+    #     text: '{{ range .Alerts }}{{ .Annotations.summary }}{{ end }}'
+
+inhibit_rules:
+  - source_match:
+      severity: 'critical'
+    target_match:
+      severity: 'warning'
+    equal: ['alertname', 'cluster', 'service']

app/controllers/hello_controller.rb

@@ -5,7 +5,7 @@ def index
   end
 
   def refresh_online
-    users_online_count = rand(100..1000)
+    users_online_count = params['manual_count'].presence || rand(100..1000)
     Yabeda.top_shop.user_online.set({}, users_online_count)
     render plain: "#{users_online_count} users online now"
   end

config/environments/development.rb

@@ -69,4 +69,6 @@
 
   # Apply autocorrection by RuboCop to files generated by `bin/rails generate`.
   # config.generators.apply_rubocop_autocorrect_after_generate!
+
+  config.hosts.clear
 end

config/initializers/lograge.rb

@@ -0,0 +1,5 @@
+Rails.application.configure do
+  # Configure lograge
+  config.lograge.enabled = true
+  config.lograge.formatter = Lograge::Formatters::Json.new
+end

config/initializers/logster.rb

@@ -0,0 +1,4 @@
+Rails.application.config.to_prepare do
+  Logster.store.level = Logger::INFO
+  Logster.config.application_version = Rails.application.class.module_parent_name
+end

config/routes.rb

@@ -1,5 +1,12 @@
 Rails.application.routes.draw do
   mount Yabeda::Prometheus::Exporter, at: "/metrics"
+  mount(
+    Rack::Auth::Basic.new(Logster::Web) do |username, password|
+      username == ENV.fetch('LOGSTER_USERNAME', 'admin') &&
+        password == ENV.fetch('LOGSTER_PASSWORD', 'admin')
+    end,
+    at: "/logs"
+  )
   # Define your application routes per the DSL in https://guides.rubyonrails.org/routing.html
 
   # Reveal health status on /up that returns 200 if the app boots with no exceptions, otherwise 500.

docker-compose.yml

@@ -0,0 +1,88 @@
+version: '3.8'
+
+services:
+  web:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    command: bash -c "rm -f tmp/pids/server.pid && bundle exec rails server -b 0.0.0.0"
+    volumes:
+      - .:/app
+      - bundle_cache:/usr/local/bundle
+    ports:
+      - "3000:3000"
+    environment:
+      RAILS_ENV: development
+      RAILS_DEVELOPMENT_HOSTS: .web
+      REDIS_URL: redis://redis:6379/0
+    depends_on:
+      - redis
+
+  prometheus:
+    image: prom/prometheus:latest
+    ports:
+      - "9090:9090"
+    volumes:
+      - ./prometheus/prometheus.yml:/etc/prometheus/prometheus.yml
+      - ./prometheus/alert_rules.yml:/etc/prometheus/alert_rules.yml
+      - prometheus_data:/prometheus
+    command:
+      - '--config.file=/etc/prometheus/prometheus.yml'
+      - '--storage.tsdb.path=/prometheus'
+      - '--web.console.libraries=/usr/share/prometheus/console_libraries'
+      - '--web.console.templates=/usr/share/prometheus/consoles'
+    depends_on:
+      - web
+      - alertmanager
+
+  grafana:
+    image: grafana/grafana:latest
+    ports:
+      - "3001:3000"
+    environment:
+      GF_SECURITY_ADMIN_USER: admin
+      GF_SECURITY_ADMIN_PASSWORD: admin
+    volumes:
+      - grafana_data:/var/lib/grafana
+      - ./grafana/provisioning:/etc/grafana/provisioning
+    depends_on:
+      - prometheus
+
+  node_exporter:
+    image: prom/node-exporter:latest
+    ports:
+      - "9100:9100"
+    command:
+      - '--path.procfs=/host/proc'
+      - '--path.sysfs=/host/sys'
+      - '--collector.filesystem.mount-points-exclude=^/(sys|proc|dev|host|etc)($$|/)'
+    volumes:
+      - /proc:/host/proc:ro
+      - /sys:/host/sys:ro
+      - /:/rootfs:ro
+
+  alertmanager:
+    image: prom/alertmanager:latest
+    ports:
+      - "9093:9093"
+    volumes:
+      - ./alertmanager/alertmanager.yml:/etc/alertmanager/alertmanager.yml
+      - alertmanager_data:/alertmanager
+    command:
+      - '--config.file=/etc/alertmanager/alertmanager.yml'
+      - '--storage.path=/alertmanager'
+
+  redis:
+    image: redis:7-alpine
+    ports:
+      - "6379:6379"
+    volumes:
+      - redis_data:/data
+    command: redis-server --appendonly yes
+
+volumes:
+  bundle_cache:
+  prometheus_data:
+  grafana_data:
+  alertmanager_data:
+  redis_data:

grafana/provisioning/dashboards/dashboard.yml

@@ -0,0 +1,12 @@
+apiVersion: 1
+
+providers:
+  - name: 'Default'
+    orgId: 1
+    folder: ''
+    type: file
+    disableDeletion: false
+    updateIntervalSeconds: 10
+    allowUiUpdates: true
+    options:
+      path: /etc/grafana/provisioning/dashboards