Lab17 is done#4268
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Implemented Flask-based web service for DevOps monitoring and diagnostics. Application features: - GET / endpoint with comprehensive system information - GET /health endpoint for monitoring - Environment-based configuration (HOST, PORT=8080, DEBUG) - Error handling for 404 and 500 errors - Structured logging with INFO level Code quality: - PEP 8 compliant code with docstrings - Clean modular structure - Proper imports organization Documentation: - Complete README.md with installation and usage instructions - Detailed LAB01.md with framework justification and best practices - Real API responses from MacBook-Pro--Egor.local system - 3 screenshots demonstrating endpoints functionality Configuration: - requirements.txt with pinned versions (Flask 3.1.0, Werkzeug 3.1.3) - .gitignore for Python, IDE, and OS files - Tests directory prepared for Lab 3
Go implementation of DevOps Info Service: - Same endpoints: GET / and GET /health with identical JSON structure - Standard library only (net/http, encoding/json, runtime, os, time) - Real API responses from MacBook-Pro--Egor.local (go1.25.6, arm64) - Documentation: README, GO.md (language justification), LAB01.md - 5 screenshots: build, running, main endpoint, health, size comparison - Binary 5.2MB vs Python venv 21MB, memory 7MB vs 35.5MB Fixes in Python docs: - Logger example matches app.py (HOST:PORT) - Removed Lab 3 and Kubernetes probes references
Docker containerization for Python and Go implementations: Python container: - Dockerfile with python:3.12-slim base image - Non-root user (appuser) for security - Layer caching optimization (requirements.txt before app.py) - .dockerignore for efficient builds - Pushed to Docker Hub: aezuraa/devops-info-service:python Go multi-stage build: - Two-stage Dockerfile (golang:1.23-alpine → alpine:3.19) - Static binary - 91.5% size reduction - Pushed to Docker Hub: aezuraa/devops-info-service:go Documentation: - Updated README.md with Docker sections for both apps - app_python/docs/LAB02.md: best practices, real terminal outputs, tagging strategy - app_go/docs/LAB02.md: multi-stage analysis, security benefits, performance comparison
- Unit tests: 27 Python tests (97% coverage), 22 Go tests (75.9% coverage) - GitHub Actions: python-ci.yml and go-ci.yml with path filters - CI pipeline: flake8/golangci-lint → tests → Docker build+push → Snyk scan - CalVer versioning with 3 tags per build (latest, date, SHA) - Best practices: caching, concurrency, job dependencies, coverage threshold - Documentation: LAB03.md for both apps
- Terraform: Yandex Cloud VM, VPC, subnet, security group (SSH/80/5000), variables, outputs, .tflint.hcl, README; service account auth - Pulumi: same infrastructure in Python (pulumi-yandex), local backend - docs/LAB04.md: provider choice, Terraform/Pulumi steps, outputs, SSH proof, Terraform vs Pulumi comparison, Lab 5 plan and cleanup - .github/workflows/terraform-ci.yml: validate on terraform/** (fmt, init, validate, tflint) - terraform/github/: GitHub provider and repository resource for import (bonus) - .gitignore: tfstate, tfvars, .terraform, pulumi/venv, Pulumi.*.yaml, credentials
…pp, CI/CD - Add blocks, rescue/always, and tags to common, docker, web_app roles - Deploy via Docker Compose (docker-compose.yml.j2 template) - Wipe logic with double-gating (variable + tag) - Multi-app: deploy_python, deploy_bonus, deploy_all; independent wipe - GitHub Actions: ansible-deploy.yml (Python), ansible-deploy-bonus.yml (Go) - Add LAB06.md with documentation and evidence
- Create dummy vault pass in CI lint step to fix syntax-check - Fix yaml[truthy]: yes/no → true/false across all playbooks and roles - Fix key-order: reorder block-level keys per ansible-lint spec - Replace apt-get commands with apt module in rescue blocks - Add changed_when/failed_when instead of ignore_errors - Rename registered vars to web_app_* prefix - Add .ansible-lint config to skip var-naming for role defaults
- Deploy Loki 3.0 (TSDB/v13), Promtail 3.0, Grafana 12.3 via Docker Compose - Add structured JSON logging to Python app with custom JSONFormatter - Integrate both apps (Python/Go) with Promtail Docker SD and logging labels - Create 4-panel Grafana dashboard with LogQL queries - Add resource limits, health checks, and Grafana auth via .env - Add Ansible monitoring role with Jinja2 templates and idempotent deployment - Document setup, architecture, LogQL examples, and evidence screenshots
Instrument Python app with /metrics (Counter/Gauge/Histogram) and tests, add Prometheus service + scrape config, provision Grafana datasources/dashboards, and extend Ansible monitoring role; document LAB08 with evidence screenshots.
…on for Helm charts
…docs, and verification screenshots
…nt/coverage failures
Add ArgoCD Application resources pointing to the Helm chart in k8s/devops-info-python for the default (manual sync), dev (auto-sync with selfHeal+prune), and prod (manual sync) environments. Bump the dev nodePort to 30081 so dev and default can coexist on the same cluster.
…plicationSet Add dev/prod Application manifests (dev: auto-sync+selfHeal+prune, prod: manual), an ApplicationSet with a List generator as the bonus task, evidence logs from the self-healing tests, and full documentation in k8s/ARGOCD.md. Bump dev replicaCount to 2 to exercise the GitOps workflow after push.
Capture the end-to-end push→hard-refresh→OutOfSync→auto-sync→Synced flow in §5, including the recorded argocd app history with the ccac837 sync event. Update replica counts and sync-status outputs throughout §2–§3 and §7 to match the post-push state (dev now at 2 replicas), and tighten a few stale notes about hooks and sync history.
…-green, and analysis-driven auto-rollback
… ServiceMonitor scraping
Signed-off-by: Dmitrii Creed <creeed22@gmail.com>
Signed-off-by: Dmitrii Creed <creeed22@gmail.com>
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