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Guia de estudo do Certified Kubernetes Administrator (CKA)
book

Guia de estudo do Certified Kubernetes Administrator (CKA)

by Benjamin Muschko
April 2025
Intermediate to advanced
204 pages
4h 55m
Portuguese (Portugal, Brazil)
O'Reilly Media, Inc.
Content preview from Guia de estudo do Certified Kubernetes Administrator (CKA)

Respostas às perguntas de revisão

Capítulo 2, "Arquitetura, instalação e configuração do cluster"

  1. Primeiro, cria o espaço de nomes chamado apps. Depois, cria a ServiceAccount:

    $ kubectl create namespace apps
    $ kubectl create serviceaccount api-access -n apps

    Em alternativa, podes utilizar a abordagem declarativa. Cria o espaço de nomes a partir da definição no ficheiro apps-namespace.yaml:

    apiVersion: v1
    kind: Namespace
    metadata:
      name: apps

    Cria o espaço de nomes a partir do ficheiro YAML:

    $ kubectl create -f apps-namespace.yaml

    Cria um novo ficheiro YAML chamado api-serviceaccount.yaml com o seguinte conteúdo:

    apiVersion: v1
    kind: ServiceAccount
    metadata:
      name: api-access
      namespace: apps

    Executa o comando create para instanciar a ServiceAccount a partir do ficheiro YAML:

    $ kubectl create -f api-serviceaccount.yaml
  2. Utiliza o comando create clusterrole para criar imperativamente o ClusterRole:

    $ kubectl create clusterrole api-clusterrole --verb=watch,list,get \
      --resource=pods

    Se preferires começar com o ficheiro YAML, utiliza o conteúdo apresentado no ficheiro api-clusterrole.yaml:

    apiVersion: rbac.authorization.k8s.io/v1
    kind: ClusterRole
    metadata:
      name: api-clusterrole
    rules:
    - apiGroups: [""]
      resources: ["pods"]
      verbs: ["watch","list","get"]

    Cria o ClusterRole a partir do ficheiro YAML:

    $ kubectl create -f api-clusterrole.yaml

    Utiliza o comando create clusterrolebinding para criar imperativamente o ClusterRoleBinding.

    $ kubectl create clusterrolebinding api-clusterrolebinding ...
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Publisher Resources

ISBN: 9798341641471