[클라우드/쿠버네티스] kubectl 명령어 정리

 

 

kubectl run

Pod 실행

# sudo kubectl run Pod명 --image 이미지명 --restart Never [root@]$ sudo kubectl run devpd --image nginx --restart Never pod/devpd created

 

 

kubectl get pod

pod 조회

# sudo kubectl get pod Pod명 [root@]$ sudo kubectl get pod devpd NAME      READY   STATUS   RESTARTS   AGE devpd       1/1          Running    0                   4m33s

 

 

-o yaml

yaml파일 출력

-o: output

# sudo kubectl get pod Pod명 -o yaml [root@]$ sudo kubectl get pod devpd -oyaml apiVersion: v1 kind: Pod metadata:   creationTimestamp: "2024-08-12T06:47:32Z"   labels:     run: devpd   name: devpd   namespace: default   resourceVersion: "2956"   selfLink: /api/v1/namespaces/default/pods/devpd   uid: 4a57107a-2cfb-4110-b6bb-1eb339d19715

 

 

kubectl describe

Pod 상태 확인

# sudo kubectl describe pod Pod명 [root@]$ sudo kubectl describe pod devpd Name:         devpd Namespace:    default Priority:     0 Node:         master/IP Start Time:   Mon, 12 Aug 2024 15:47:32 +0900 Labels:       run=devpd Annotations:  <none> Status:       Running

 

 

kubectl exec

Pod 명령어 실행

# sudo kubectl exec Pod명 -- 명령어 [root@]$ sudo kubectl exec devpd -- apt update WARNING: apt does not have a stable CLI interface. Use with caution in scripts. Ign:1 http://deb.debian.org/debian bookworm InRelease Ign:2 http://deb.debian.org/debian bookworm-updates InRelease Ign:3 http://deb.debian.org/debian-security bookworm-security InRelease Ign:1 http://deb.debian.org/debian bookworm InRelease Ign:2 http://deb.debian.org/debian bookworm-updates InRelease Ign:3 http://deb.debian.org/debian-security bookworm-security InRelease Ign:1 http://deb.debian.org/debian bookworm InRelease

 

 

-- printenv

환경변수 조회

#sudo kubectl exec pod이름 -- printenv [root@]$ sudo kubectl exec devpd -- printenv PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=devpd KUBERNETES_PORT_443_TCP_PROTO=tcp KUBERNETES_PORT_443_TCP_PORT=443 KUBERNETES_PORT_443_TCP_ADDR=10.43.0.1 KUBERNETES_SERVICE_HOST=10.43.0.1 KUBERNETES_SERVICE_PORT=443 KUBERNETES_SERVICE_PORT_HTTPS=443 KUBERNETES_PORT=tcp://10.43.0.1:443 KUBERNETES_PORT_443_TCP=tcp://10.43.0.1:443 NGINX_VERSION=1.27.1 NJS_VERSION=0.8.5 NJS_RELEASE=1~bookworm PKG_RELEASE=1~bookworm DYNPKG_RELEASE=2~bookworm HOME=/root

 

 

kubectl logs

Pod 로그 확인

# sudo kubectl logs Pod명 [root@]$ sudo kubectl logs devpd /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

 

 

kubectl delete

Pod 삭제

# sudo kubectl delete pod Pod명 [root@]$ sudo kubectl delete pod devpd pod "devpd" deleted

 

 

kubectl cp

서버 내 파일을 Pod로 복사

# sudo kubectl cp 파일경로 Pod명:경로 [root@]$ sudo kubectl cp ./cpTest devpd:/. [root@]$ sudo kubectl exec devpd -- cat /cpTest cpTest

 

 

kubectl --namespace

namespace별 Pod 조회

# sudo kubectl get po -n 네임스페이스 [root@]$ sudo kubectl get po -n kube-system NAME                                      READY   STATUS    RESTARTS   AGE local-path-provisioner-58fb86bdfd-l29xt   1/1     Running   1          44h coredns-6c6bb68b64-ssccc                  1/1     Running   1          44h

 

 

kubectl label node

노드에 라벨 추가

# sudo kubectl label node 노드명 key=value [root@]$ sudo kubectl label node master weather=tooHot [root@]$ sudo kubectl get node master -o yaml apiVersion: v1 kind: Node   labels:     weather: tooHot   name: master ...