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k8s, www.hongsnet.net lastinit

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      [![logo](https://www.hongsnet.net/images/logo.gif)](https://www.hongsnet.net)
      # [www.hongsnet.net](http://www.hongsnet.net) 서비스 구성
      > 다음은 최종적으로 검토/검증 된 `K8s` 구성내역이며, 결과에 대해서만 명시한다.
      # Cluster Node의 현황
      ```bash
      # kubectl get nodes
      NAME STATUS ROLES AGE VERSION
      tb2 Ready <none> 17h v1.20.4
      tb2-docker Ready control-plane,master 23h v1.20.4
      tb3 Ready <none> 17h v1.20.4
      tb3-docker Ready <none> 17h v1.20.4
      ```
      ```bash
      # cat /etc/hosts
      127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
      ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
      172.24.0.245 TB2-DOCKER
      172.24.0.151 TB2
      172.16.0.158 TB3
      172.16.0.251 TB3-DOCKER
      ```
      # Cluster의 현황
      ```bash
      # kubectl cluster-info
      Kubernetes control plane is running at https://172.24.0.245:6443
      KubeDNS is running at https://172.24.0.245:6443/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy
      To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.
      ```
      # Config의 현황
      ```bash
      # kubectl config view
      apiVersion: v1
      clusters:
      - cluster:
      certificate-authority-data: DATA+OMITTED
      server: https://172.24.0.245:6443
      name: kubernetes
      contexts:
      - context:
      cluster: kubernetes
      user: kubernetes-admin
      name: kubernetes-admin@kubernetes
      current-context: kubernetes-admin@kubernetes
      kind: Config
      preferences: {}
      users:
      - name: kubernetes-admin
      user:
      client-certificate-data: REDACTED
      client-key-data: REDACTED
      ```
      # Object의 내역
      - **Deployment**
      ```python
      # cat hongsnet.yaml
      apiVersion: apps/v1
      kind: Deployment
      metadata:
      labels:
      app: hongsnet
      name: hongsnet-web
      spec:
      replicas: 5
      strategy:
      type: RollingUpdate
      rollingUpdate:
      maxSurge: 1
      maxUnavailable: 0
      selector:
      matchLabels:
      app: hongsnet
      template:
      metadata:
      labels:
      app: hongsnet
      spec:
      volumes:
      - name: webeditor-hongsnet-volume
      persistentVolumeClaim:
      claimName: webeditor-hongsnet-volume-pvc
      - name: webdata-hongsnet-volume
      persistentVolumeClaim:
      claimName: webdata-hongsnet-volume-pvc
      - name: webeditor-edu-volume
      persistentVolumeClaim:
      claimName: webeditor-edu-volume-pvc
      - name: webdata-edu-volume
      persistentVolumeClaim:
      claimName: webdata-edu-volume-pvc
      - name: webeditorfile-edu-volume
      persistentVolumeClaim:
      claimName: webeditorfile-edu-volume-pvc
      - name: webeditor-newsystem-volume
      persistentVolumeClaim:
      claimName: webeditor-newsystem-volume-pvc
      - name: webdata-newsystem-volume
      persistentVolumeClaim:
      claimName: webdata-newsystem-volume-pvc
      - name: websrc-home-volume
      persistentVolumeClaim:
      claimName: websrc-home-volume-pvc
      containers:
      - image: registry.hongsnet.net/joohan.hong/docker/hongsnet:latest
      #imagePullPolicy: Always
      imagePullPolicy: IfNotPresent
      name: hongsnet-web
      volumeMounts:
      - mountPath: /home
      name: websrc-home-volume
      - mountPath: /home/edu/public_html/HongsBoard/Data
      name: webdata-edu-volume
      - mountPath: /home/edu/public_html/HongsBoard/Web_editor/EDU
      name: webeditor-edu-volume
      - mountPath: /home/edu/public_html/HongsBoard/Web_editor/FILE
      name: webeditorfile-edu-volume
      - mountPath: /home/hongsnet/public_html/Data
      name: webdata-hongsnet-volume
      - mountPath: /home/hongsnet/public_html/Web_editor/FILE
      name: webeditor-hongsnet-volume
      - mountPath: /home/newhongsystem/public_html/Data
      name: webdata-newsystem-volume
      - mountPath: /home/newhongsystem/public_html/Web_editor/FILE
      name: webeditor-newsystem-volume
      resources:
      requests:
      cpu: "500m"
      limits:
      cpu: "500m"
      nodeSelector:
      key: worker
      ```
      - **Scale**
      ```python
      # cat hongsnet_scale.yaml
      apiVersion: autoscaling/v1
      kind: HorizontalPodAutoscaler
      metadata:
      name: hongsnet-hpa
      namespace: default
      spec:
      scaleTargetRef:
      apiVersion: apps/v1
      kind: Deployment
      name: hongsnet-web
      minReplicas: 5
      maxReplicas: 10
      targetCPUUtilizationPercentage: 80
      ```
      - **Service**
      ```python
      # cat hongsnet_service.yaml
      apiVersion: v1
      kind: Service
      metadata:
      name: hongsnet-web
      spec:
      type: NodePort
      selector:
      app: hongsnet
      ports:
      - port: 80
      targetPort: 80
      nodePort: 30000
      ```
      # Service의 현황
      ```bash
      # kubectl get svc
      NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
      hongsnet-web NodePort 10.110.34.12 <none> 80:30000/TCP 7h47m
      kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 23h
      ```
      # Pod의 현황
      ```bash
      # kubectl get pods -o wide
      NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
      hongsnet-web-54b64478f9-6ff9x 1/1 Running 0 7h50m 10.244.1.5 tb2 <none> <none>
      hongsnet-web-54b64478f9-7bzjw 1/1 Running 0 7h50m 10.244.1.6 tb2 <none> <none>
      hongsnet-web-54b64478f9-gtsmt 1/1 Running 0 7h50m 10.244.2.6 tb3 <none> <none>
      hongsnet-web-54b64478f9-sqdrm 1/1 Running 0 7h50m 10.244.3.4 tb3-docker <none> <none>
      hongsnet-web-54b64478f9-vh7lf 1/1 Running 0 7h50m 10.244.2.5 tb3 <none> <none>
      ```
      # Replicas의 현황
      ```bash
      # ./kube-replicaget.sh
      NAME DESIRED CURRENT READY AGE
      hongsnet-web-54b64478f9 5 5 5 7h51m
      ```
      # Deployment의 현황
      ```bash
      # ./kube-getdeploy.sh
      NAME READY UP-TO-DATE AVAILABLE AGE
      hongsnet-web 5/5 5 5 7h48m
      ```
      # 전체 Namespace 현황
      ```bash
      # ./kube-allnamespace.sh
      NAMESPACE NAME READY STATUS RESTARTS AGE
      default hongsnet-web-54b64478f9-6ff9x 1/1 Running 0 7h49m
      default hongsnet-web-54b64478f9-7bzjw 1/1 Running 0 7h49m
      default hongsnet-web-54b64478f9-gtsmt 1/1 Running 0 7h49m
      default hongsnet-web-54b64478f9-sqdrm 1/1 Running 0 7h49m
      default hongsnet-web-54b64478f9-vh7lf 1/1 Running 0 7h49m
      kube-system coredns-74ff55c5b-5zwvp 1/1 Running 0 23h
      kube-system coredns-74ff55c5b-qpjpx 1/1 Running 0 23h
      kube-system etcd-tb2-docker 1/1 Running 0 23h
      kube-system kube-apiserver-tb2-docker 1/1 Running 0 23h
      kube-system kube-controller-manager-tb2-docker 1/1 Running 0 23h
      kube-system kube-flannel-ds-2xrfm 1/1 Running 0 23h
      kube-system kube-flannel-ds-4pqw4 1/1 Running 0 17h
      kube-system kube-flannel-ds-dqv8s 1/1 Running 0 17h
      kube-system kube-flannel-ds-v8d5h 1/1 Running 0 17h
      kube-system kube-proxy-7tjgj 1/1 Running 0 23h
      kube-system kube-proxy-cdh6g 1/1 Running 0 17h
      kube-system kube-proxy-hqc94 1/1 Running 0 17h
      kube-system kube-proxy-vbsnr 1/1 Running 0 17h
      kube-system kube-scheduler-tb2-docker 1/1 Running 0 23h
      kube-system metrics-server-6b4d4457cd-6mxcg 1/1 Running 0 9h
      kubernetes-dashboard dashboard-metrics-scraper-7b59f7d4df-r5pn9 1/1 Running 0 9h
      kubernetes-dashboard kubernetes-dashboard-74d688b6bc-q9m4x 1/1 Running 0 9h
      ```
      # Label의 현황
      ```bash
      # kubectl get nodes --show-labels
      NAME STATUS ROLES AGE VERSION LABELS
      tb2 Ready <none> 17h v1.20.4 beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,key=worker,kubernetes.io/arch=amd64,kubernetes.io/hostname=tb2,kubernetes.io/os=linux
      tb2-docker Ready control-plane,master 23h v1.20.4 beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,key=master,kubernetes.io/arch=amd64,kubernetes.io/hostname=tb2-docker,kubernetes.io/os=linux,node-role.kubernetes.io/control-plane=,node-role.kubernetes.io/master=
      tb3 Ready <none> 17h v1.20.4 beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,key=worker,kubernetes.io/arch=amd64,kubernetes.io/hostname=tb3,kubernetes.io/os=linux
      tb3-docker Ready <none> 17h v1.20.4 beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,key=worker,kubernetes.io/arch=amd64,kubernetes.io/hostname=tb3-docker,kubernetes.io/os=linux
      ```
      # Auto Scaling 설정(HPA) 현황
      ```bash
      # kubectl get hpa
      NAME REFERENCE TARGETS MINPODS MAXPODS REPLICAS AGE
      hongsnet-web Deployment/hongsnet-web 0%/80% 5 10 5 7h51m
      ```
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