[K8S] 쿠버네티스 - YAML 파일로 Pod 생성

 

 

Pod 구성하는 YAML 파일 생성

# pod 생성하는 YAML 파일 생성
master@master:~$ cat jinsunginx.yaml 
apiVersion: v1
kind: Pod
metadata:
  labels:
    run: jinsunginx
  name: jinsunginx
spec:
  containers:
  - name: nginx
    image: nginx
master@master:~$

 

 

YAML 파일로 Pod 생성

# YAML 파일로 Pod 생성
master@master:~$ kubectl apply -f jinsunginx.yaml 
pod/jinsunginx created
master@master:~$


# 생성한 Pod 확인
master@master:~$ kubectl get pod jinsunginx -oyaml
apiVersion: v1
kind: Pod
metadata:
  annotations:
    kubectl.kubernetes.io/last-applied-configuration: |
      {"apiVersion":"v1","kind":"Pod","metadata":{"annotations":{},"labels":{"run":"jinsunginx"},"name":"jinsunginx","namespace":"default"},"spec":{"containers":[{"image":"nginx","name":"nginx"}]}}
  creationTimestamp: "2022-08-07T06:26:05Z"
  labels:
    run: jinsunginx
  name: jinsunginx
  namespace: default
  resourceVersion: "5061"
  selfLink: /api/v1/namespaces/default/pods/jinsunginx
  uid: 40941481-58b6-4684-8cce-7dd2dd84653b
spec:
  containers:
  - image: nginx
    imagePullPolicy: Always
    name: nginx
    resources: {}
    terminationMessagePath: /dev/termination-log
    terminationMessagePolicy: File
    volumeMounts:
    - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
      name: default-token-g8wm6
      readOnly: true
  dnsPolicy: ClusterFirst
  enableServiceLinks: true
  nodeName: master
  priority: 0
  restartPolicy: Always
  schedulerName: default-scheduler
  securityContext: {}
  serviceAccount: default
  serviceAccountName: default
  terminationGracePeriodSeconds: 30
  tolerations:
  - effect: NoExecute
    key: node.kubernetes.io/not-ready
    operator: Exists
    tolerationSeconds: 300
  - effect: NoExecute
    key: node.kubernetes.io/unreachable
    operator: Exists
    tolerationSeconds: 300
  volumes:
  - name: default-token-g8wm6
    secret:
      defaultMode: 420
      secretName: default-token-g8wm6
status:
  conditions:
  - lastProbeTime: null
    lastTransitionTime: "2022-08-07T06:26:05Z"
    status: "True"
    type: Initialized
  - lastProbeTime: null
    lastTransitionTime: "2022-08-07T06:26:09Z"
    status: "True"
    type: Ready
  - lastProbeTime: null
    lastTransitionTime: "2022-08-07T06:26:09Z"
    status: "True"
    type: ContainersReady
  - lastProbeTime: null
    lastTransitionTime: "2022-08-07T06:26:05Z"
    status: "True"
    type: PodScheduled
  containerStatuses:
  - containerID: docker://101279274be74990989e719696b2853cc3b5da4c382a78f4e738aa9bbb14f4e3
    image: nginx:latest
    imageID: docker-pullable://nginx@sha256:ecc068890de55a75f1a32cc8063e79f90f0b043d70c5fcf28f1713395a4b3d49
    lastState: {}
    name: nginx
    ready: true
    restartCount: 0
    started: true
    state:
      running:
        startedAt: "2022-08-07T06:26:09Z"
  hostIP: 192.168.0.201
  phase: Running
  podIP: 10.42.0.6
  podIPs:
  - ip: 10.42.0.6
  qosClass: BestEffort
  startTime: "2022-08-07T06:26:05Z"
master@master:~$

 

 

Kubectl run명령으로 yaml 파일 생성

• 커맨드는 서비스에 대한 구성을 생성하지만, 이를 kube-apiserver에 전송하는 대신 YAML 형식으로 stdout에 출력한다.

kubectl run redis --image=redis --dry-run=client -o yaml > redis.yaml

cat redis.yaml

apiVersion: v1
kind: Pod
metadata:
  creationTimestamp: null
  labels:
    run: redis
  name: redis
spec:
  containers:
  - image: redis
    name: redis
    resources: {}
  dnsPolicy: ClusterFirst
  restartPolicy: Always
status: {}

 

 

즉석 리소스 생성

# 즉시 리소스 생성
master@master:~$ cat << EOF | kubectl apply -f -
> apiVersion: v1
> kind: Pod
> metadata:
>   labels:
>     run: jinsunginx
>   name: jinsunginx
> spec:
>   containers:
>   - name: nginx
>     image: nginx
>     ports:
>     - containerPort: 80
> EOF
pod/jinsunginx created
master@master:~$

# 상태 확인
master@master:~$ kubectl get pod
NAME         READY   STATUS    RESTARTS   AGE
jinsunginx   1/1     Running   0          15s
master@master:~$ kubectl get pod jinsunginx -oyaml
apiVersion: v1
kind: Pod
metadata:
  annotations:
    kubectl.kubernetes.io/last-applied-configuration: |
      {"apiVersion":"v1","kind":"Pod","metadata":{"annotations":{},"labels":{"run":"jinsunginx"},"name":"jinsunginx","namespace":"default"},"spec":{"containers":[{"image":"nginx","name":"nginx","ports":[{"containerPort":80}]}]}}
  creationTimestamp: "2022-08-07T07:03:01Z"
  labels:
    run: jinsunginx
  name: jinsunginx
  namespace: default
  resourceVersion: "6649"
  selfLink: /api/v1/namespaces/default/pods/jinsunginx
  uid: fd90af8b-8d3d-40fb-bd3c-7ac553728cc5
spec:
  containers:
  - image: nginx
    imagePullPolicy: Always
    name: nginx
    ports:
    - containerPort: 80
      protocol: TCP
    resources: {}
    terminationMessagePath: /dev/termination-log
    terminationMessagePolicy: File
    volumeMounts:
    - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
      name: default-token-g8wm6
      readOnly: true
  dnsPolicy: ClusterFirst
  enableServiceLinks: true
  nodeName: master
  priority: 0
  restartPolicy: Always
  schedulerName: default-scheduler
  securityContext: {}
  serviceAccount: default
  serviceAccountName: default
  terminationGracePeriodSeconds: 30
  tolerations:
  - effect: NoExecute
    key: node.kubernetes.io/not-ready
    operator: Exists
    tolerationSeconds: 300
  - effect: NoExecute
    key: node.kubernetes.io/unreachable
    operator: Exists
    tolerationSeconds: 300
  volumes:
  - name: default-token-g8wm6
    secret:
      defaultMode: 420
      secretName: default-token-g8wm6
status:
  conditions:
  - lastProbeTime: null
    lastTransitionTime: "2022-08-07T07:03:01Z"
    status: "True"
    type: Initialized
  - lastProbeTime: null
    lastTransitionTime: "2022-08-07T07:03:06Z"
    status: "True"
    type: Ready
  - lastProbeTime: null
    lastTransitionTime: "2022-08-07T07:03:06Z"
    status: "True"
    type: ContainersReady
  - lastProbeTime: null
    lastTransitionTime: "2022-08-07T07:03:01Z"
    status: "True"
    type: PodScheduled
  containerStatuses:
  - containerID: docker://aeab365d5f8ea73911e2218105f0194825748ae244cd377a718e68d78cae7557
    image: nginx:latest
    imageID: docker-pullable://nginx@sha256:ecc068890de55a75f1a32cc8063e79f90f0b043d70c5fcf28f1713395a4b3d49
    lastState: {}
    name: nginx
    ready: true
    restartCount: 0
    started: true
    state:
      running:
        startedAt: "2022-08-07T07:03:05Z"
  hostIP: 192.168.0.201
  phase: Running
  podIP: 10.42.0.8
  podIPs:
  - ip: 10.42.0.8
  qosClass: BestEffort
  startTime: "2022-08-07T07:03:01Z"
master@master:~$