February 2026
Intermediate to advanced
372 pages
9h 38m
Portuguese (Portugal, Brazil)
Content preview from Cilium: Em funcionamento (Portuguese Edition)
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Capítulo 12. Políticade rede
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Os controles de segurança de rede são usados para proteger as cargas de trabalho, impedindo o acesso não intencional, interrompendo o movimento lateral e aplicando a política organizacional. Tudo isso pode ser feito no nível da rede, reduzindo a necessidade de coordenar políticas entre equipes diferentes e aplicativos de terceiros. As abordagens tradicionais são difíceis de implementar em um ambiente nativo da nuvem. Os IPs de pods e serviços podem mudar sem aviso prévio, e todos os pods geralmente ocupam o mesmo intervalo CIDR, de modo que os dispositivos de segurança de rede externos não conseguem diferenciar o tráfego de diferentes cargas de trabalho.1
O recurso de política de rede do Cilium, uma extensão da Kubernetes NetworkPolicy, é um substituto dentro do cluster para esses controles tradicionais que está profundamente integrado aos conceitos existentes do Kubernetes, como namespaces, rótulos de carga de trabalho e serviços.
Todos os manifestos deste capítulo estão no diretório chapter12 do repositório GitHub do livro. Vamos citar os nomes dos arquivos necessários à medida que nos referirmos a eles e mostrar apenas as partes importantes aqui.
Criando uma política básica
Vamos começar criando um cluster e implantando o Cilium. Não precisamos de nenhuma configuração especial para usar a política de rede, mas veja os capítulos ...
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