April 2025
Intermediate to advanced
200 pages
5h 57m
Portuguese (Portugal, Brazil)
Content preview from Segurança de contentores
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Capítulo 6. Imagens de contentores
Este trabalho foi traduzido com recurso a IA. Agradecemos o teu feedback e comentários: translation-feedback@oreilly.com
Se tens usado o Docker ou o Kubernetes, é provável que estejas familiarizado com a ideia de imagens de contentores que armazenas num registo. Neste capítulo, vamos explorar as imagens de contêiner, analisando o que elas contêm e como os tempos de execução de contêineres, como o Docker ou o runc, as utilizam.
Com uma compreensão do que são imagens, estás pronto para pensar nas implicações de segurança da criação, armazenamento e recuperação de imagens - e existem muitos vectores de ataque relacionados com estes passos. Aprenderás sobre as práticas recomendadas para garantir que as compilações e as imagens não comprometam o sistema geral.
Configuração do sistema de ficheiros raiz e da imagem
Há duas partes numa imagem de contentor: o sistema de ficheiros raiz e alguma configuração.
Se seguiste os exemplos do Capítulo 4, fizeste o download de uma cópia do sistema de ficheiros raiz do Alpine e usaste-o como o conteúdo da raiz dentro do teu container. Em geral, quando você inicia um container, você o instancia a partir de uma imagem de container, e a imagem inclui o sistema de arquivos raiz. Se correres docker run -it alpine sh e a comparares com o que está dentro do teu contentor construído à mão, verás a mesma disposição de diretórios e ficheiros, e eles coincidirão completamente se a versão do Alpine for a mesma.
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.