k8s tomcat 배포

안녕하세요~~ 저희는 공공의 적 팀입니다~~<(*^.^*)/

 

오늘은 k8s 환경 tomcat 배포 방법에 대해 소개드립니다.

 

Apache tomcat 이란 ? 

-> 아파치 톰캣은 아파치 소프트웨어 재단에서 개발한 서블릿 컨테이너만 있는 웹 애플리케이션 서버

 

 

1. 컨테이너 구성

(1) 톰캣 배포 및 서비스용 yaml 파일 생성

• vi tomcat-deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: tomcat-deployment-ksh
  labels:
    tags.datadoghq.com/env: "env1"
    tags.datadoghq.com/service: "service1"
    tags.datadoghq.com/version: "version1"
spec:
  selector:
    matchLabels:
      app: tomcat-deployment-ksh
  template:
    metadata:
      labels:
        app: tomcat-deployment-ksh
        tags.datadoghq.com/env: "env1"
        tags.datadoghq.com/service: "service1"
        tags.datadoghq.com/version: "version1"

    spec:
      volumes:
        - hostPath:
            path: /var/run/datadog/
          name: apmsocketpath
      containers:
        - name: tomcat-container-ksh
          image: tomcat:8.5.53      
          ports:
            - containerPort: 8080
					volumeMounts:
            - name: apmsocketpath
              mountPath: /var/run/datadog
          env:
            - name: DD_ENV
              valueFrom:
                fieldRef:
                  fieldPath: metadata.labels['tags.datadoghq.com/env']
            - name: DD_SERVICE
              valueFrom:
                fieldRef:
                  fieldPath: metadata.labels['tags.datadoghq.com/service']
            - name: DD_VERSION
              valueFrom:
                fieldRef:
                  fieldPath: metadata.labels['tags.datadoghq.com/version']

            - name: DD_LOGS_INJECTION
              value: "true"

• vi tomcat-service.yaml

apiVersion: v1
kind: Service
metadata: 
  name: tomcat-service-ksh
spec:
  type: NodePort
  ports:
    - port: 80
      protocol: TCP
      targetPort: 8080
      nodePort: 32227
  selector:
    app: tomcat-deployment-ksh

• kubectl appy -f tomcat-deployment.yaml
• kubectl appy -f tomcat-service.yaml

2 . 클러스터 ip : 32227 로 설치한 톰캣 웹페이지 접속( service.yaml에서 지정한 외부 포트 , 32227 포트 오픈 필요 )