[NHN Cloud] NHN Kubernetes Service(NKS) 를 이용한 커뮤니티 블로그 구축 사례

apiVersion: v1
kind: Namespace
metadata:
  name: project

apiVersion: apps/v1
kind: Deployment
metadata:
  name: tomcat-mariadb
  labels:
    app: mariadb
  namespace: project
spec:
  replicas: 1
  selector:
    matchLabels:
      app: mariadb
  template:
    metadata:
      labels:
        app: mariadb
    spec:
      hostname: mariadb
      containers:
      - name: mariadb
        image: bchwang/tomcat_mariadb:mariadb
        ports:
        - containerPort: 3306
          name: mariadb

apiVersion: v1
kind: Service
metadata:
  name: tomcat-mariadb
  labels:
    app: mariadb
  namespace: project
spec:
  clusterIP: None
  ports:
  - port: 3306
  selector:
    app: mariadb

apiVersion: v1
kind: Service
metadata:
  name: nginx-tomcat
  labels:
    app: nginx-tomcat
  namespace: project
  ## 오브젝트 선언형 관리
  annotations
    ## Floating ip 유지 설정
    loadbalancer.openstack.org/keep-floatingip: "true"
spec:
  ports:
  - port: 80
    protocol: TCP
    targetPort: 30000
  selector:
    app: nginx-tomcat
  ## NodePort 가 아니라 LoadBalancer 로 설정 해 주어야 함.
  type: LoadBalancer
  ## Floating ip 를 지정 하여 Loadbalancer ip 로 설정.
  loadBalancerIP: 133.186.216.107

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-tomcat
  labels:
    app: nginx-tomcat
  namespace: project
spec:
  replicas: 10
  selector:
    matchLabels:
      app: nginx-tomcat
  template:
    metadata:
      labels:
        app: nginx-tomcat
      name: nginx-tomcat
    spec:
      hostname: nginx-tomcat
      hostAliases:
      - ip: "10.100.4.9" ### mariadb hosts 지정
        hostnames:
        - "mariadb"
      containers:
      - name: nginx-tomcat
        image: bchwang/tomcat_mariadb:nginx_tomcat
        ports:
        - containerPort: 80
          name: nginx-tomcat

### mariadb 및 서비스 실행   
$ kubectl apply -f 1.kubernetes_mariadb+service.yaml

### Mariadb Pod 실행 및 IP 정보 확인     
$ kubectl get pod -n project -o wide
NAME                                        READY     STATUS    RESTARTS   AGE          IP            NODE       NOMINATED NODE   READINESS GATES
mariadb-service-59868b7dd6-xb8tq            1/1       Running   0          1m           10.100.4.9    kubernetes   <none>           <none>

### ip 입력 후 nginx & tomcat 실행    
kubectl apply -f 2.kubernetes_nginx+tomcat.yaml

### Pod 실행 및 IP 정보 확인     
$ kubectl get pod -n project -o wide
NAME                                        READY     STATUS    RESTARTS   AGE          IP            NODE       NOMINATED NODE   READINESS GATES
mariadb-service-59868b7dd6-xb8tq            1/1       Running   0          1m           10.100.4.9    kubernetes   <none>           <none>
nginx_tomcat-service-59868b7dd6-xb8tq       1/1       Running   0          1m           10.100.4.10   kubernetes   <none>           <none>

### Service 정보 확인     
$ kubectl get service -n project -o wide
NAMESPACE              NAME                            TYPE         CLUSTER-IP      EXTERNAL-IP   PORT(S)                  AGE     SELECTOR
nginx_tomcat           nginx_tomcat                    LoadBalancer 133.186.216.107 <none>        80/TCP                   8m4s    app=nginx_tomcat
mariadb                mariadb                         ClusterIP    <none>          <none>        3306/TCP                 18m4s   app=mariadb