[kubernetes] APP(httpd) 배포 테스트

APP(httpd) 배포 테스트

deployment 생성

$ kubectl create deployment test-httpd --image=httpd
deployment.apps/test-httpd created

Pod/Deployment 확인

$ kubectl get pods
NAME                                READY   STATUS    RESTARTS   AGE
test-httpd-7f58b4d6cf-8nmx7         1/1     Running   0          41s

$ kubectl get deployment
NAME               READY   UP-TO-DATE   AVAILABLE   AGE
test-httpd         1/1     1            1           6m43s


###label 확인
$ kubectl get pod --show-labels
NAME                                READY   STATUS    RESTARTS   AGE    LABELS
test-httpd-7f58b4d6cf-8nmx7         1/1     Running   0          3h4m   app=test-httpd,pod-template-hash=7f58b4d6cf

Service 생성

$ kubectl create service nodeport test-httpd --tcp=80:80
service/test-httpd created

Service 확인

$ kubectl get service
NAME            TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)        AGE
test-httpd      NodePort    10.96.253.169   <none>        80:31965/TCP   73s

cURL 웹 테스트

$ curl 10.96.253.169
<html><body><h1>It works!</h1></body></html>

레플리카셋

레플리카셋 3 늘리기

###replicaset, pod 이름 확인
$ kubectl get replicaset,pod -l app=test-httpd
NAME                                    DESIRED   CURRENT   READY   AGE
replicaset.apps/test-httpd-7f58b4d6cf   1         1         1       3h23m

NAME                              READY   STATUS    RESTARTS   AGE
pod/test-httpd-7f58b4d6cf-8nmx7   1/1     Running   0          3h23m


###test-httpd-7f58b4d6cf 편집
$ kubectl edit replicaset test-httpd-7f58b4d6cf
# Please edit the object below. Lines beginning with a '#' will be ignored,
# and an empty file will abort the edit. If an error occurs while saving this file will be
# reopened with the relevant failures.
#
apiVersion: apps/v1
kind: ReplicaSet
metadata:
  annotations:
    deployment.kubernetes.io/desired-replicas: "1"
    deployment.kubernetes.io/max-replicas: "2"
    deployment.kubernetes.io/revision: "1"
  creationTimestamp: "2020-11-10T06:30:54Z"
  generation: 7
  labels:
    app: test-httpd
    pod-template-hash: 7f58b4d6cf
  name: test-httpd-7f58b4d6cf
  namespace: default
  ownerReferences:
  - apiVersion: apps/v1
    blockOwnerDeletion: true
    controller: true
    kind: Deployment
    name: test-httpd
    uid: 0ad51163-fade-4861-bf71-de47fe7686ef
  resourceVersion: "1730548"
  selfLink: /apis/apps/v1/namespaces/default/replicasets/test-httpd-7f58b4d6cf
  uid: 9bae6a2d-dd4c-49f2-a194-19599d2c1a15
spec:
  replicas: 1 ### 1 -> 5
  selector:
    matchLabels:
      app: test-httpd
      pod-template-hash: 7f58b4d6cf
  template:
    metadata:
      creationTimestamp: null
      labels:
        app: test-httpd
        pod-template-hash: 7f58b4d6cf
    spec:
      containers:
      - image: httpd
        imagePullPolicy: Always
        name: httpd
        resources: {}
        terminationMessagePath: /dev/termination-log
        terminationMessagePolicy: File
      dnsPolicy: ClusterFirst
      restartPolicy: Always
      schedulerName: default-scheduler
      securityContext: {}
      terminationGracePeriodSeconds: 30
status:
  availableReplicas: 1
  fullyLabeledReplicas: 1
  observedGeneration: 7
  readyReplicas: 1

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