Docker
  • Introdução a Containeres e Docker
    • Introdução
    • O que é um container e suas vantanges
    • VM versus Container
    • Como funcionam os containers
    • Linux
    • Container sem Docker
      • cgroup
      • cpu.max
    • LxC
    • LxD
    • Containers versus Imagens
    • Arquitetura do Docker
    • Arquitetura do Docker mais a fundo
    • Projetos Open Source
  • Instalação do Docker
    • Linux
    • Windows
      • Docker Desktop
      • Rancher Desktop
      • WSL
    • Mac
    • Visual Studio Code
  • Primeiros Passos com Docker
    • Criação e listagem básica de um container
    • Interagindo com o container
    • Executando containers continuamente
      • nginx
      • docker container run
      • docker container run nginx
      • docker container run -d nginx
      • docker container exec
    • Como usar publish de porta
      • docker container stop
      • docker container start
      • docker container rm
      • docker container rm -f $(docker container ls -qa)
    • Containers e variáveis de ambiente
      • docker container run -e
  • Desafio
    • Desafio 01 - Banco de Dados Postgresql
    • Desafio 02 - Banco de Dados MySQL
    • Desafio 03 - Banco de Dados MongoDB
  • Executando a sua primeira aplicação em containers
    • Introdução
    • Preparando o container para a aplicação
    • Executando a aplicação
      • docker container cp
  • Primeiros Passos com Docker Images
    • Introdução
    • OverlayFS na Prática
    • Copy-on-Write
    • Formas de criar uma imagem Docker
    • Como funciona o Docker Commit
    • Docker Commit na Prática
      • docker commit
    • Entendendo melhor a sua imagem
      • docker image history
      • docker image inspect
    • Entrando mais a fundo na imagem
    • Como usar a imagem Docker no modo raiz
  • Avançando em imagens Docker com Dockerfile
    • O que é Dockerfile
    • Primeira Imagem com Dockerfile
      • docker image build
    • Como funciona a construção com Dockerfile
    • Possibilidades com Dockerfile
    • FROM
    • RUN
    • WORKDIR
    • COPY
    • ADD
    • LABEL
    • ENV
    • VOLUME
    • ARG
    • EXPOSE
    • USER
    • ENTRYPOINT
    • CMD
    • ENTRYPOINT versus CMD
    • Principais comandos com imagem
    • Imagem da aplicação com Dockerfile
    • Comparando Docker Commit com Dockerfile
  • Docker Registry
    • Introdução
    • Docker Hub
    • Sua imagem com o nome certo
    • Renomear imagens com Docker Tag
      • docker image tag
    • Enviando a sua primeira imagem para o Docker Hub
      • docker image push
      • docker image pull
  • Algumas boas práticas para construção de imagem
    • Um processo por container
    • Usar imagens confiáveis
    • Otimizar sempre a sua imagem
    • Uso inteligente das camadas
    • Dockerignore
  • Multistage Build
    • Introdução
    • Multistage build na prática
    • Target para fazer o build
      • docker image build --target
    • Imagem externa no Multistage build
    • Usar um estágio de build como base
  • Docker Volume
    • Introdução
      • docker volume
    • Bind Mount
    • Particularidades do Bind Mount
    • Bind Mount no Windows
    • Exemplo com Bind Mount
    • Docker Volume
      • docker volume create
      • docker volume inspect
      • docker volume ls
      • docker volume prune
      • docker volume rm
    • Onde ficam os arquivos do Docker volume?
    • Usando o volume no Dockerfile
    • Como fazer backup de um Docker Volume
    • Exemplo com Docker Volume
    • Storage tmpfs
    • Como criar algo funcional com o que aprendemos
  • Network
    • Introdução
    • Componentes do Docker Network
    • Rede Bridge na prática
      • docker network
      • docker network create
      • docker network inspect
      • docker network ls
      • docker network prune
      • docker network rm
    • Criando a sua rede bridge
      • docker network connect
      • docker network disconnect
    • Como funciona a rede bridge por dentro
    • Rede Host na prática
    • Rede none da prática
    • Como adicionar domínios no seu container
  • Aplicação 100% no Docker
    • Introdução
    • Criação da Imagem e Envio para o Docker Hub
    • Criação do Docker Network
    • Container do PostgreSQL
    • Container da Aplicação Web
    • Atualização da aplicação
  • Docker Compose
    • Introdução
      • docker compose
    • A evolução do docker compose
    • Criação básica de um Docker Compose
      • docker compose attach
      • docker compose build
      • docker compose config
      • docker compose cp
      • docker compose create
      • docker compose down
      • docker compose events
      • docker compose exec
      • docker compose images
      • docker compose kill
      • docker compose logs
      • docker compose ls
      • docker compose pause
      • docker compose port
      • docker compose ps
      • docker compose pull
      • docker compose push
      • docker compose restart
      • docker compose rm
      • docker compose run
      • docker compose scale
      • docker compose start
      • docker compose stats
      • docker compose stop
      • docker compose top
      • docker compose unpause
      • docker compose up
      • docker compose version
      • docker compose wait
      • docker compose watch
    • Variáveis de Ambiente
    • Volume Bind Mount
    • Docker Volume
    • Docker Network - Bridge
    • Docker Network - Host Driver e Add Host
    • Ordenando a execução dos containers
    • Compose com build de imagem
    • Como Parametrizar o Compose com Variáveis de Ambiente
    • Múltiplos Composes
    • Extends
    • Merge
    • Include
    • Profiles
    • Comandos importantes do Docker Compose
  • Troubleshooting
    • Introdução
    • Docker Info
    • Docker Events
    • Docker Logs
    • Docker Inspect
    • Docker Top
    • Docker Stats
    • Docker Exec
  • Resiliência e Gerenciamento de Recursos
    • Introdução
    • Docker Restart
      • Introdução
      • on-failure
      • unless-stopped
      • always
      • Docker Compose
    • Healthcheck
      • Introdução
      • Linha de Comando
      • Docker Compose
      • Direto na Imagem
    • Gerenciamento de Recurso
      • CPU
        • Como Gerenciar CPU
        • Prática
      • Memória
        • Como Gerenciar Memória
        • Prática
      • Docker Compose
  • Fazendo um ambiente mais seguro
    • Introdução
    • Docker Scout
      • Introdução
      • Verificação Simples de Imagem
      • Como adicionar um repositório
      • Primeira melhoria na imagem
  • BUSCA RÁPIDA
    • Referências
    • Comandos
      • docker commit
      • docker compose
      • docker container
      • docker image
      • docker network
      • docker volume
    • Dockerfile
Powered by GitBook
On this page
  1. Primeiros Passos com Docker

Executando containers continuamente

PreviousInteragindo com o containerNextnginx

Last updated 9 months ago

$ docker container run nginx
Unable to find image 'nginx:latest' locally
latest: Pulling from library/nginx
e4fff0779e6d: Pull complete
2a0cb278fd9f: Pull complete
7045d6c32ae2: Pull complete
03de31afb035: Pull complete
0f17be8dcff2: Pull complete
14b7e5e8f394: Pull complete
23fa5a7b99a6: Pull complete
Digest: sha256:447a8665cc1dab95b1ca778e162215839ccbb9189104c79d7ec3a81e14577add
Status: Downloaded newer image for nginx:latest
/docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration
/docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/
/docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh
10-listen-on-ipv6-by-default.sh: info: Getting the checksum of /etc/nginx/conf.d/default.conf
10-listen-on-ipv6-by-default.sh: info: Enabled listen on IPv6 in /etc/nginx/conf.d/default.conf
/docker-entrypoint.sh: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh
/docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh
/docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh
/docker-entrypoint.sh: Configuration complete; ready for start up
2024/08/15 21:43:00 [notice] 1#1: using the "epoll" event method
2024/08/15 21:43:00 [notice] 1#1: nginx/1.27.1
2024/08/15 21:43:00 [notice] 1#1: built by gcc 12.2.0 (Debian 12.2.0-14)
2024/08/15 21:43:00 [notice] 1#1: OS: Linux 5.15.146.1-microsoft-standard-WSL2
2024/08/15 21:43:00 [notice] 1#1: getrlimit(RLIMIT_NOFILE): 1048576:1048576
2024/08/15 21:43:00 [notice] 1#1: start worker processes
2024/08/15 21:43:00 [notice] 1#1: start worker process 29
2024/08/15 21:43:00 [notice] 1#1: start worker process 30
2024/08/15 21:43:00 [notice] 1#1: start worker process 31
2024/08/15 21:43:00 [notice] 1#1: start worker process 32
2024/08/15 21:43:00 [notice] 1#1: start worker process 33
2024/08/15 21:43:00 [notice] 1#1: start worker process 34
2024/08/15 21:43:00 [notice] 1#1: start worker process 35
2024/08/15 21:43:00 [notice] 1#1: start worker process 36
2024/08/15 21:43:00 [notice] 1#1: start worker process 37
2024/08/15 21:43:00 [notice] 1#1: start worker process 38
2024/08/15 21:43:00 [notice] 1#1: start worker process 39
2024/08/15 21:43:00 [notice] 1#1: start worker process 40
2024/08/15 21:43:10 [notice] 1#1: signal 28 (SIGWINCH) received
2024/08/15 21:43:10 [notice] 1#1: signal 28 (SIGWINCH) received
2024/08/15 21:43:11 [notice] 1#1: signal 28 (SIGWINCH) received
2024/08/15 21:43:11 [notice] 1#1: signal 28 (SIGWINCH) received
2024/08/15 21:43:11 [notice] 1#1: signal 28 (SIGWINCH) received
2024/08/15 21:43:11 [notice] 1#1: signal 28 (SIGWINCH) received
2024/08/15 21:43:11 [notice] 1#1: signal 28 (SIGWINCH) received
2024/08/15 21:43:11 [notice] 1#1: signal 28 (SIGWINCH) received
2024/08/15 21:43:11 [notice] 1#1: signal 28 (SIGWINCH) received
2024/08/15 21:43:11 [notice] 1#1: signal 28 (SIGWINCH) received
2024/08/15 21:43:11 [notice] 1#1: signal 28 (SIGWINCH) received
2024/08/15 21:43:11 [notice] 1#1: signal 28 (SIGWINCH) received
2024/08/15 21:43:12 [notice] 1#1: signal 28 (SIGWINCH) received
2024/08/15 21:43:20 [notice] 1#1: signal 28 (SIGWINCH) received
2024/08/15 21:43:20 [notice] 1#1: signal 28 (SIGWINCH) received
2024/08/15 21:43:20 [notice] 1#1: signal 28 (SIGWINCH) received
2024/08/15 21:43:20 [notice] 1#1: signal 28 (SIGWINCH) received
2024/08/15 21:43:21 [notice] 1#1: signal 28 (SIGWINCH) received
2024/08/15 21:43:21 [notice] 1#1: signal 28 (SIGWINCH) received
2024/08/15 21:43:21 [notice] 1#1: signal 28 (SIGWINCH) received
2024/08/15 21:43:21 [notice] 1#1: signal 28 (SIGWINCH) received
2024/08/15 21:43:21 [notice] 1#1: signal 28 (SIGWINCH) received
2024/08/15 21:43:21 [notice] 1#1: signal 28 (SIGWINCH) received
2024/08/15 21:43:21 [notice] 1#1: signal 28 (SIGWINCH) received
2024/08/15 21:43:21 [notice] 1#1: signal 28 (SIGWINCH) received
2024/08/15 21:43:21 [notice] 1#1: signal 28 (SIGWINCH) received
2024/08/15 21:43:21 [notice] 1#1: signal 28 (SIGWINCH) received
2024/08/15 21:43:21 [notice] 1#1: signal 28 (SIGWINCH) received
2024/08/15 21:43:21 [notice] 1#1: signal 28 (SIGWINCH) received
2024/08/15 21:43:21 [notice] 1#1: signal 28 (SIGWINCH) received
2024/08/15 21:43:21 [notice] 1#1: signal 28 (SIGWINCH) received
2024/08/15 21:43:21 [notice] 1#1: signal 28 (SIGWINCH) received
2024/08/15 21:43:21 [notice] 1#1: signal 28 (SIGWINCH) received
2024/08/15 21:43:21 [notice] 1#1: signal 28 (SIGWINCH) received
2024/08/15 21:43:21 [notice] 1#1: signal 28 (SIGWINCH) received
2024/08/15 21:43:21 [notice] 1#1: signal 28 (SIGWINCH) received

O terminal ficou preso!

Execução do container em modo detached (segundo plano):

$ docker container run -d nginx
3a6870fc609d4fce898d42d780b000f4896fb182a5cb92f11efd06256c21d180
$ docker container ls
CONTAINER ID   IMAGE     COMMAND                  CREATED          STATUS          PORTS     NAMES
3a6870fc609d   nginx     "/docker-entrypoint.…"   13 seconds ago   Up 13 seconds   80/tcp    naughty_benz

$ docker container ls -a
CONTAINER ID   IMAGE     COMMAND                  CREATED              STATUS                            PORTS     NAMES
3a6870fc609d   nginx     "/docker-entrypoint.…"   52 seconds ago       Up 52 seconds                     80/tcp    naughty_benz

Abrir o endereço http://localhost no navegador não funcionará. O container é executado de forma isolada.

Execução de uma instrução dentro do container:

$ docker exec -it 3a6870fc609d /bin/bash
root@3a6870fc609d:/# curl http://localhost
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
html { color-scheme: light dark; }
body { width: 35em; margin: 0 auto;
font-family: Tahoma, Verdana, Arial, sans-serif; }
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>

<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>

<p><em>Thank you for using nginx.</em></p>
</body>
</html>

Será iniciada a sessão de terminal interativa do contêiner. O prompt de comando mudará para refletir que está dentro do contêiner. A partir daí, pode-se executar comandos Linux como se estivesse em um servidor normal. Por exemplo, pode-se navegar pelo sistema de arquivos, instalar pacotes, modificar arquivos de configuração, verificar logs, etc.

nginx