
<21>  pod 자세히 보기


1

k get pod -o=wide

NAME                             READY   STATUS    RESTARTS   AGE   IP              NODE                                              NOMINATED NODE   READINESS GATES

nginx-project-59d59f75c4-wnnbd   1/1     Running   0          16m   192.168.1.187   ip-192-168-1-11.ap-northeast-2.compute.internal   <none>           <none>





2

k get pods

NAME                             READY   STATUS    RESTARTS   AGE

nginx-project-59d59f75c4-wnnbd   1/1     Running   0          25m







k describe pod nginx-project-59d59f75c4-wnnbd

Name:             nginx-project-59d59f75c4-wnnbd

Namespace:        default

Priority:         0

Service Account:  default

Node:             ip-192-168-1-11.ap-northeast-2.compute.internal/192.168.1.11

Start Time:       Tue, 26 Dec 2023 12:27:12 +0900

Labels:           app=nginx-project

                  pod-template-hash=59d59f75c4

Annotations:      <none>

Status:           Running

IP:               192.168.1.187

IPs:

  IP:           192.168.1.187





3

kubectl get pods -o jsonpath='{.items[*].spec.containers[*].image}'

nginx







챰고 사이트

https://kubernetes.io/ko/docs/tasks/configure-pod-container/assign-pods-nodes/







<22>  pod이름과 시작 시간을 보자.


kubectl get pods -o=jsonpath='{range .items[*]}{.metadata.name}{"\t"}{.status.startTime}{"\n"}

{end}'





참고 서적

15단계로 배우는 도커와 쿠버네티스 - 97페이지



1

kubectl create deployment nginx-project --image=nginx  --dry-run=client -o yaml --port=80 > nginx-deploy.yaml



kubectl apply -f nginx-deploy.yaml





more nginx-deploy.yaml



kind: Deployment

metadata:

  creationTimestamp: null

  labels:

    app: nginx-project

  name: nginx-project

spec:

  replicas: 1

  selector:

    matchLabels:

      app: nginx-project

  strategy: {}

  template:

    metadata:

      creationTimestamp: null

      labels:

        app: nginx-project

    spec:

      containers:

      - image: nginx

        name: nginx

        ports:

        - containerPort: 80

        resources: {}

status: {}







 k get pods

NAME                             READY   STATUS    RESTARTS   AGE

nginx-project-59d59f75c4-wnnbd   1/1     Running   0          28h





2

kubectl get pods -o=jsonpath='{range .items[*]}{.metadata.name}{"\t"}{.status.startTime}{"\n"}

{end}'



nginx-project-59d59f75c4-wnnbd  2023-12-26T03:27:12Z





kubectl get pods -o=jsonpath='{.items[0].metadata.name}'



kubectl get pods -o=jsonpath="{.items[*]['metadata.name', 'status.capacity']}"





kubectl get pods <pod-name> -o custom-columns=NAME:.metadata.name,RSRC:.metadata.resourceVersion



kubectl get pods <pod-name> -o custom-columns-file=template.txt







https://kubernetes.io/docs/reference/kubectl/#output-options

Command line tool (kubectl)
Production-Grade Container Orchestration

kubernetes.io 








<23>  배포 이력 확인


kubectl rollout history deployment deployment-nginx



참고

https://brunch.co.kr/@topasvga/1674

쿠버1탄-10. 쿠버네티스 -컨트롤러
다음은 쿠버네티스 스터디 자료를 참고해 정리한 내용입니다. 모니터링하며, 원하는 상태가 되도록 만들어 주는것이 컨트롤러 이다. <1> 컨트롤러? <2> ReplicaSet ? <3> 리플리카셋 실습 <4> 죽지 않

brunch.co.kr/@topasvga/1674 






<24> Job을 만들고 삭제하자


1

cat <<EOT > my-job.yaml

apiVersion: batch/v1

kind: Job

metadata:

  name: my-job

spec:

  template:

    spec:

      containers:

      - name: my-job

        image: busybox

        command: ["echo", "Hello World!"]

      restartPolicy: Never

  backoffLimit: 4

EOT

kubectl apply -f my-job.yaml





2

또는

# kubectl create 로도 가능

kubectl create job my-job --image=busybox -- echo "Hello World!"







3

kubectl get jobs

NAME     COMPLETIONS   DURATION   AGE

my-job   1/1           5s         17s





4

kubectl delete job my-job







<25> PV 목록을 가져오고 크기별로 정렬해보자


PV 목록을 가져오고 크기별로 정렬해보자



kubectl get pv --sort-by=.spec.capacity.storage 



NAME             CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS      CLAIM   STORAGECLASS   REASON   AGE

efs-pv           5Gi        RWO            Retain           Available                                   33h

task-pv-volume   10Gi       RWO            Retain           Available           manual                  32h





kubectl get pv --help









<26> 모든 수신 트래픽을 거부하는 NetworkPolicy 




network-policy-default-deny-ingress.yaml

---

apiVersion: networking.k8s.io/v1

kind: NetworkPolicy

metadata:

  name: default-deny-ingress

spec:

  podSelector: {}

  policyTypes:

  - Ingress





참고 사이트

https://kubernetes.io/docs/concepts/services-networking/network-policies/







<27> 모든 네임스페이스 클러스터에 있는 configmap,secret 가져오기






kubectl get configmap,secrets --all-namespaces 



kubectl get configmap,secrets -A













<28> json 경로 표현으로 이름과, 네임스페이스로 pod를 나열할때

 kubectl get pods  -o=jsonpath="{.items[*]['metadata.name', 'metadata.namespace']}"