CKA SimA 01 컨텍스트

1 개요[ | ]

CKA SimA 01 컨텍스트
kubeconfig에서 컨텍스트 및 인증서 정보 추출
kubeconfig에서 컨텍스트 정보 및 인증서 추출
kubeconfig에서 컨텍스트 정보 추출 및 인증서 디코딩하기

kubeconfig 파일로부터 컨텍스트 정보와 인증서 데이터를 추출하는 실습
kubectl config 하위 명령어들을 활용하여 context 이름과 현재 context를 확인하고, 특정 사용자의 인증서 데이터를 base64 디코딩하여 파일로 저장하는 절차를 설명한다.

2 사전작업[ | ]

kubeconfig 예제 생성

cat <<EOF > /tmp/kubeconfig
apiVersion: v1
clusters:
- cluster:
    certificate-authority: .
    server: https://127.0.0.1:57481
  name: cluster1
- cluster:
    certificate-authority: .
    server: https://127.0.0.1:58535
  name: cluster2
- cluster:
    certificate-authority: .
    server: https://127.0.0.1:57225
  name: cluster3
- cluster:
    certificate-authority-data: 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
    server: https://127.0.0.1:57481
  name: kind-cluster1
- cluster:
    certificate-authority-data: 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
    server: https://127.0.0.1:58535
  name: kind-cluster2
- cluster:
    certificate-authority-data: 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
    server: https://127.0.0.1:57225
  name: kind-cluster3
contexts:
- context:
    cluster: cluster1
    user: alice@example.com
  name: alice
- context:
    cluster: cluster2
    user: bob@example.com
  name: bob
- context:
    cluster: cluster3
    user: carol@example.com
  name: carol
current-context: carol
kind: Config
preferences: {}
users:
- name: alice@example.com
  user:
    client-certificate-data: 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
    client-key-data: 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
- name: bob@example.com
  user:
    client-certificate-data: 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
    client-key-data: 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
- name: carol@example.com
  user:
    client-certificate-data: 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
    client-key-data: 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
EOF

3 컨텍스트 정보 추출[ | ]

kubeconfig에 정의된 컨텍스트 전체 보기

# k --kubeconfig=/tmp/kubeconfig config get-contexts
CURRENT   NAME    CLUSTER    AUTHINFO            NAMESPACE
          alice   cluster1   alice@example.com
          bob     cluster2   bob@example.com
*         carol   cluster3   carol@example.com

컨텍스트 이름만 한 줄씩 추출

# k --kubeconfig=/tmp/kubeconfig config get-contexts -oname
alice
bob
carol

현재 활성화된 컨텍스트 확인

# k --kubeconfig=/tmp/kubeconfig config current-context
carol

4 인증서 디코딩[ | ]

사용자 이름 확인 (인덱스로도 접근 가능하나 정확한 사용자명을 기준으로 조회하는 것이 안전)

# k --kubeconfig=/tmp/kubeconfig config view --raw -ojsonpath='{.users[*].name}'
alice@example.com bob@example.com carol@example.com

특정 사용자의 인증서 데이터 추출 (예: alice@example.com)

# k --kubeconfig=/tmp/kubeconfig config view --raw -ojsonpath="{.users[?(@.name=='alice@example.com')].user.client-certificate-data}"
LS0tLS1CRUdJTiBDRVJUSUZJ...

base64로 인코딩된 인증서를 디코딩하여 파일로 저장

# k --kubeconfig=/tmp/kubeconfig config view --raw -ojsonpath="{.users[?(@.name=='alice@example.com')].user.client-certificate-data}" | base64 -d > /tmp/alice-cert.crt

디코딩된 인증서 내용 예시

# cat /tmp/alice-cert.crt
-----BEGIN CERTIFICATE-----
MIIDKTCCAhGgAwIBAgIIUoBDy9zAI+owDQYJKoZIhvcNAQELBQAwFTETMBEGA1UE...
-----END CERTIFICATE-----

5 같이 보기[ | ]

6 참고[ | ]

https://cloudutsuk.com/posts/certification/cka/cka-pratice-test-1/#question-1--contexts