Iniciando com Docker
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The document outlines the fundamentals of using Docker, including container versus virtual machine benefits, Docker commands, and Docker's architecture. It provides practical examples of running Docker containers for applications like MongoDB and Spring Boot, along with Dockerfile usage. Additionally, it emphasizes best practices for image management and the advantages of automation and scalability in production environments.
![DOCKERFILE
FROM openjdk:8-jdk-alpine
VOLUME /tmp
COPY target/devCia-*.jar app.jar
ENTRYPOINT ["java", "-jar", "/app.jar"]
Dockerfile](https://image.slidesharecdn.com/iniciandocomdocker-190829232656/85/Iniciando-com-Docker-15-320.jpg)
![DOCKERFILE
docker build -t devcia/spring-boot .
Sending build context to Docker daemon 16.96MB
Step 1/4 : FROM openjdk:8-jdk-alpine
---> a3562aa0b991
Step 2/4 : VOLUME /tmp
---> Using cache
---> 681df48914d3
Step 3/4 : COPY target/devCia-*.jar app.jar
---> Using cache
---> dcdf13b91079
Step 4/4 : ENTRYPOINT ["java", "-jar", "/app.jar"]
---> Using cache
---> 98bc1828bab1
Successfully built 98bc1828bab1
Successfully tagged devcia/spring-boot:latest](https://image.slidesharecdn.com/iniciandocomdocker-190829232656/85/Iniciando-com-Docker-16-320.jpg)
Iniciando com Docker
- 1. INICIANDO COM DOCKER Emmanuel Neri @emmanuelnerii www.emmanuelneri.com.br
- 2. EMMANUEL NERI ‣ Mestre em Desenvolvimento de Tecnologia ‣ Desenvolvedor (Java) desde 2010 ‣ Tech lead na Jaya
- 3. DOCKER
- 4. CONTAINER
- 6. BENEFÍCIOS ▸ Portável ▸ Flexibilidade ▸ Escalável ▸ Lightweight
- 7. DOCKER
- 9. COMANDOS docker run hello-world Unable to find image 'hello-world:latest' locally latest: Pulling from library/hello-world 1b930d010525: Pull complete Digest: sha256:6540fc08ee6e6b7b63468dc3317e3303aae178cb8a45ed3123180328bcc1d20f Status: Downloaded newer image for hello-world:latest Hello from Docker! … docker ps CONTAINER ID|IMAGE|COMMAND|CREATED|STATUS|PORTS|NAMES docker images REPOSITORY|TAG|IMAGE ID|CREATED|SIZE hello-world|latest|fce289e99eb9|7 months ago|1.84kB
- 10. DOCKER ▸ Docker registry ▸ Docker Host ▸ Imagens ▸ Containers ▸ Volumes ▸ Redes ▸ Daemon ▸ Docker Client
- 11. ARQUITETURA
- 13. DOCKER RUN docker run -it --name mongodb mongo:3.5 MongoDB starting : pid=1 port=27017 dbpath=/data/db 64-bit host=64cbcf1206fe db version v3.5.13 git version: 52bbaa007cd84631d6da811d9a05b59f2dfad4f3 OpenSSL version: OpenSSL 1.0.1t 3 May 2016 allocator: tcmalloc modules: none build environment: distmod: debian81 distarch: x86_64 target_arch: x86_64 { net: { bindIpAll: true } } ** See http://dochub.mongodb.org/core/prodnotes-filesystem ** NOTE: This is a development version (3.5.13) of MongoDB. ** Not recommended for production. ** WARNING: Access control is not enabled for the database. ** Read and write access to data and configuration is unrestricted. Initializing full-time diagnostic data capture with directory '/data/db/diagnostic.data' setting featureCompatibilityVersion to 3.6 waiting for connections on port 27017
- 14. DOCKER RUN docker run -it --name file-db -e MONGO_INITDB_ROOT_USERNAME: root -e MONGO_INITDB_ROOT_PASSWORD: password mongo:3.5
- 15. DOCKERFILE FROM openjdk:8-jdk-alpine VOLUME /tmp COPY target/devCia-*.jar app.jar ENTRYPOINT ["java", "-jar", "/app.jar"] Dockerfile
- 16. DOCKERFILE docker build -t devcia/spring-boot . Sending build context to Docker daemon 16.96MB Step 1/4 : FROM openjdk:8-jdk-alpine ---> a3562aa0b991 Step 2/4 : VOLUME /tmp ---> Using cache ---> 681df48914d3 Step 3/4 : COPY target/devCia-*.jar app.jar ---> Using cache ---> dcdf13b91079 Step 4/4 : ENTRYPOINT ["java", "-jar", "/app.jar"] ---> Using cache ---> 98bc1828bab1 Successfully built 98bc1828bab1 Successfully tagged devcia/spring-boot:latest
- 17. DOCKERFILE docker run devcia/spring-boot . ____ _ __ _ _ / / ___'_ __ _ _(_)_ __ __ _ ( ( )___ | '_ | '_| | '_ / _` | / ___)| |_)| | | | | || (_| | ) ) ) ) ' |____| .__|_| |_|_| |___, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot :: (v2.1.7.RELEASE) Tomcat initialized with port(s): 8080 (http) Started DevCiaApplication in 2.593 seconds (JVM running for 3.121)
- 18. DOCKERFILE docker run -p 8080:8080 devcia/spring-boot . ____ _ __ _ _ / / ___'_ __ _ _(_)_ __ __ _ ( ( )___ | '_ | '_| | '_ / _` | / ___)| |_)| | | | | || (_| | ) ) ) ) ' |____| .__|_| |_|_| |___, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot :: (v2.1.7.RELEASE) Tomcat initialized with port(s): 8080 (http) Started DevCiaApplication in 2.593 seconds (JVM running for 3.121)
- 19. DOCKERFILE ▸ FROM ▸ MAINTAINER ▸ RUN ▸ CMD ▸ LABEL ▸ EXPOSE ▸ ENV ▸ ADD ▸ COPY ▸ ENTRYPOINT ▸ VOLUME ▸ USER ▸ WORKDIR ▸ ONBUILD
- 20. LINKS docker run -it --name docker-postgres -e POSTGRES_DB=db -e POSTGRES_USER=postgres -e POSTGRES_PASSWORD=postgres postgres:10.4 docker run -it --link docker-postgres -p 8080:8080 emmanuelneri/spring-boot-docker-app
- 21. COMPOSE version: '3' services: docker-app: image: emmanuelneri/spring-boot-docker-app ports: - "8080:8080" depends_on: - docker-postgres docker-postgres: image: postgres:10.4 environment: - POSTGRES_DB=db - POSTGRES_USER=postgres - POSTGRES_PASSWORD=postgres docker-compose up docker-compose stop
- 22. BACK-FRONT version: '3' services: web: image: despesas/despesas-web ports: - "3000:3000" links: - app app: image: despesas/despesas-app ports: - "8081:8081" links: - db db: image: postgres:9.6 ports: - "5432:5432" environment: - POSTGRES_PASSWORD=postgres - POSTGRES_USER=postgres - POSTGRES_DB=gestao-despesas
- 23. OUTROS CASES ▸ Ambientes de dev ▸ Testes automatizados ▸ Integração Continua ▸ Deploy Continuo ▸ Script automatizados ▸ Escalabilidade em produção ▸ Multi cloud
- 24. COMANDOS IMPORTANTES ‣ docker exec ‣ docker inspect ‣ docker logs ‣ docker stop ‣ docker rm -f
- 25. BOAS PRÁTICAS ‣ Usar tags das imagens ‣ Não deixar configurações fixas nas imagens ‣ Não armazenar estado
- 26. CONCLUSÃO ‣ Simples ‣ Utilizado de dev a produção ‣ Proporciona automatização ‣ Portável ‣ Escalável