[쿠버네티스 워크로드] 포드 디스크립터 작성

v2

nano go-http-pod.yaml

apiVersion: v1
kind: Pod
metadata:
  name: http-go # 포드의 이름
spec:
  containers:
  - name: http-go # 컨테이너의 이름
    image: gasbugs/http-go
    ports:
    - containerPort: 8080

imkunyoung@master-1:~/yaml$ kubectl create -f go-http-pod.yaml
pod/http-go created


imkunyoung@master-1:~/yaml$ kubectl get pods
NAME                  READY   STATUS    RESTARTS   AGE
http-go               1/1     Running   0          10s
static-web-master-1   1/1     Running   0          3m11s



imkunyoung@master-1:~/yaml$ kubectl get pods -o wide
NAME                  READY   STATUS    RESTARTS   AGE     IP           NODE       NOMINATED NODE   READINESS GATES
http-go               1/1     Running   0          33s     10.0.1.12    worker-3   <none>           <none>
static-web-master-1   1/1     Running   0          3m34s   10.0.0.106   master-1   <none>           <none>




imkunyoung@master-1:~/yaml$ kubectl get pod http-go -o yaml
apiVersion: v1
kind: Pod
metadata:
  creationTimestamp: "2023-07-31T23:53:12Z"
  name: http-go
  namespace: default
  resourceVersion: "3625070"
  uid: c13e3dd9-9bee-48a5-b031-a41aec15542c
spec:
  containers:
  - image: gasbugs/http-go
    imagePullPolicy: Always
    name: http-go
    ports:
    - containerPort: 8080
      protocol: TCP
    resources: {}
    terminationMessagePath: /dev/termination-log
    terminationMessagePolicy: File
    volumeMounts:
    - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
      name: kube-api-access-dq6k9
      readOnly: true
  dnsPolicy: ClusterFirst
  enableServiceLinks: true
  nodeName: worker-3
  preemptionPolicy: PreemptLowerPriority
  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: kube-api-access-dq6k9
    projected:
      defaultMode: 420
      sources:
      - serviceAccountToken:
          expirationSeconds: 3607
          path: token
      - configMap:
          items:
          - key: ca.crt
            path: ca.crt
          name: kube-root-ca.crt
      - downwardAPI:
          items:
          - fieldRef:
              apiVersion: v1
              fieldPath: metadata.namespace
            path: namespace
status:
  conditions:
  - lastProbeTime: null
    lastTransitionTime: "2023-07-31T23:53:12Z"
    status: "True"
    type: Initialized
  - lastProbeTime: null
    lastTransitionTime: "2023-07-31T23:53:14Z"
    status: "True"
    type: Ready
  - lastProbeTime: null
    lastTransitionTime: "2023-07-31T23:53:14Z"
    status: "True"
    type: ContainersReady
  - lastProbeTime: null
    lastTransitionTime: "2023-07-31T23:53:12Z"
    status: "True"
    type: PodScheduled
  containerStatuses:
  - containerID: containerd://51c91f3016763dd6093cadccb1adc71746631bc0abf5ea1458b2e0b2dc6886d5
    image: docker.io/gasbugs/http-go:latest
    imageID: docker.io/gasbugs/http-go@sha256:5cf243f818caf7a750761cfe2ff822a284d6eb459356318d3f0bd4b1efe141d9
    lastState: {}
    name: http-go
    ready: true
    restartCount: 0
    started: true
    state:
      running:
        startedAt: "2023-07-31T23:53:14Z"
  hostIP: 10.138.0.5
  phase: Running
  podIP: 10.0.1.12
  podIPs:
  - ip: 10.0.1.12
  qosClass: BestEffort
  startTime: "2023-07-31T23:53:12Z"
  
  
  

imkunyoung@master-1:~/yaml$ kubectl describe pods http-go
Name:             http-go
Namespace:        default
Priority:         0
Service Account:  default
Node:             worker-3/10.138.0.5
Start Time:       Mon, 31 Jul 2023 23:53:12 +0000
Labels:           <none>
Annotations:      <none>
Status:           Running
IP:               10.0.1.12
IPs:
  IP:  10.0.1.12
Containers:
  http-go:
    Container ID:   containerd://51c91f3016763dd6093cadccb1adc71746631bc0abf5ea1458b2e0b2dc6886d5
    Image:          gasbugs/http-go
    Image ID:       docker.io/gasbugs/http-go@sha256:5cf243f818caf7a750761cfe2ff822a284d6eb459356318d3f0bd4b1efe141d9
    Port:           8080/TCP
    Host Port:      0/TCP
    State:          Running
      Started:      Mon, 31 Jul 2023 23:53:14 +0000
    Ready:          True
    Restart Count:  0
    Environment:    <none>
    Mounts:
      /var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-dq6k9 (ro)
Conditions:
  Type              Status
  Initialized       True 
  Ready             True 
  ContainersReady   True 
  PodScheduled      True 
Volumes:
  kube-api-access-dq6k9:
    Type:                    Projected (a volume that contains injected data from multiple sources)
    TokenExpirationSeconds:  3607
    ConfigMapName:           kube-root-ca.crt
    ConfigMapOptional:       <nil>
    DownwardAPI:             true
QoS Class:                   BestEffort
Node-Selectors:              <none>
Tolerations:                 node.kubernetes.io/not-ready:NoExecute op=Exists for 300s
                             node.kubernetes.io/unreachable:NoExecute op=Exists for 300s
Events:
  Type    Reason     Age   From               Message
  ----    ------     ----  ----               -------
  Normal  Scheduled  118s  default-scheduler  Successfully assigned default/http-go to worker-3
  Normal  Pulling    117s  kubelet            Pulling image "gasbugs/http-go"
  Normal  Pulled     116s  kubelet            Successfully pulled image "gasbugs/http-go" in 575.414659ms (575.426579ms including waiting)
  Normal  Created    116s  kubelet            Created container http-go
  Normal  Started    116s  kubelet            Started container http-go
  
  






imkunyoung@master-1:~/yaml$ kubectl delete -f go-http-pod.yaml
pod "http-go" deleted





imkunyoung@master-1:~/yaml$ kubectl logs http-go







imkunyoung@master-1:~/yaml$ kubectl annotate pod http-go key=hi
pod/http-go annotate





imkunyoung@master-1:~/yaml$ kubectl get pods http-go -o yaml
apiVersion: v1
kind: Pod
metadata:
  annotations:
    key: hi









imkunyoung@master-1:~/yaml$ kubectl delete pod --all
pod "http-go" deleted
pod "static-web-master-1" deleted







imkunyoung@master-1:~/yaml$ kubectl get ppods
error: the server doesn't have a resource type "ppods"







imkunyoung@master-1:~/yaml$ kubectl get pods
NAME                  READY   STATUS    RESTARTS   AGE
static-web-master-1   0/1     Pending   0          7s

---

v1

포드 정의 구성 요소

• apiVersion: 쿠버네티스 api의 버전을 가리킴
• kind: 어떤 리소스 유형인지 결정 (포드 레플리카컨트롤러, 서비스 등)
• 메타데이터: 포드와 관련된 이름, 네임스페이스, 라벨, 그 밖의 정보 존재
• 스펙: 컨테이너, 볼륨 등의 정보
• 상태: 포드의 상태, 각 컨테이너의 설명 및 상태, 포드 내부의 IP 및 그 밖의 기본 정보 등

go-http-pod.yaml

mkdir yaml

cd yaml

touch go-http-pod.yaml

vim go-http-pod.yaml

apiVersion: v1
kind: Pod
metadata:
  name: http-go
spec:
  containers:
  - name: http-go
    image: gasbugs/http-go
    ports:
    - containerPort: 8080

kubectl create -f go-http-pod.yaml

kubectl get pods

watch kubectl get pods

kubectl get pod http-go -o yaml

kubectl logs http-go

kubectl delete -f go-http-pod.yaml

kubectl annotate pod http-go test1234=test1234

kubectl delete pod --all

kubectl delete pod http-go