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GDG Lima - Docker Compose
Docker Compose allows defining and running multi-container Docker applications. It allows defining services, their dependencies, and volumes in a YAML file. Some key features include centralized configuration, service discovery via an embedded DNS, and treating infrastructure as code. Common commands include `docker-compose up` to start services, `docker-compose build` to build images, and `docker-compose down` to stop services. It helps solve issues with running isolated containers and dependencies between containers.
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GDG Lima - Docker Compose
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- 2. Who I am? •Mario Inga Cahuana • Software Developer • Member A.P.E.S.O.L. • Community Docker Lima • DevOps at Bookingmotor • Metal m/
- 3. Recordando Docker • Engine: •Image • Container • Volume • Network • Ecosystem
- 4. Docker Flow 1 23 4 5
- 6. Problemas • Containers aislados •Construir image antes de lanzar container • Dependencia de containers • Reiniciar solo algunos containers • Service discovery • Mapear todos los: puertos, volumes, vars, etc etc
- 7. Ventajas • Configuración centralizadaen un solo archivo docker-compose.yml • Resolución de services mediante el DNS embebido de Docker • Extensión de configuración • Infrastructure as Code
- 8. Estructura • version: "2" •services: nginx: image: ports: volumes: command: depends_on: another: …
- 9. Example - Ports version:'2' services: nginx: image: nginx:1.11 ports: - 80:80
- 10. Example - Volumes version:'2' services: nginx: image: nginx:1.11 ports: - 80:80 volumes: - ./logs/:/var/log/nginx/ - ./html/:/usr/share/nginx/html
- 11. Example: Build version: '2' services: nginx: image:mario21ic/nginx build: context: ./ ports: - 8080:80
- 12. Example: Command version: '2' services: composer: image:composer volumes: - ./:/app/ command: install
- 13. Example: Depends version: '3.1' services: wordpress: image:wordpress ports: - 8080:80 environment: WORDPRESS_DB_PASSWORD: example mysql: image: mysql:5.5 environment: MYSQL_ROOT_PASSWORD: example
- 14. Comands • Descargar lasimages: $ docker-compose pull $ docker-compose pull wordpress • Revisar el log: $ docker-compose logs $ docker-compose logs -f wordpress
- 15. Commands • Build deimages: $ docker-compose build $ docker-compose build nginx • Iniciar todos los services: $ docker-compose up $ docker-compose up -d --no-deps db
- 16. Commands • Ejecutar uncomando de un service: $ docker-compose run composer install • Ejecutar un comando en un container existente: $ docker-compose exec nginx bash
- 17. Comands • Stop deservices: $ docker-compose stop $ docker-compose stop mysql • Reiniciar services: $ docker-compose restart $ docker-compose restart mysql
- 18. Comands • Kill services: $docker-compose kill $ docker-compose kill mysql • Eliminar services: $ docker-compose rm $ docker-compose rm mysql
- 19. Estructura II • volumes: db-data: •networks: front-tier: back-tier:
- 20. Example - Odooversion:'2' services: odoo: image: odoo:10 environment: PGHOST: database PGUSER: odoo PGPASSWORD: odoo depends_on: - db ports: - 8069:8069 db: image: postgres:9.3 environment: POSTGRES_USER: odoo POSTGRES_PASSWORD: odoo volumes: - "db-data:/var/lib/postgresql/data" ports: - 5432:5432 volumes: db-data:
- 21. Example - Appvoting • https://github.com/docker/example-voting-app front back
- 22. Override • Se defineen docker-compose.override.yml • Sobre escritura del archivo docker-compose.yml • Recomendado para separar en un template base el mapeo de todos los componentes de nuestro proyecto. • No requiere ser invocado con -f myfile.yml, es ejecutado con el comando docker-compose up
- 23. Version Compose file format Docker Engine release 3.0;3.1 1.13.0+ 2.1 1.12.0+ 2.0 1.10.0+ 1.0 1.9.1.+ https://docs.docker.com/compose/compose-file/compose-versioning/
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