Kubernetes集群部署tomcat容器/Java web应用流程-docker cp方式,kubernetes-docker
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Kubernetes集群部署tomcat容器/Java web应用流程-docker cp方式,kubernetes-docker
- kube-tomcat.yaml实现如下。
# Copyright 2015 Google Inc. All Rights Reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. # Configuration to deploy release version of the Dashboard UI. # # Example usage: kubectl create -f <this_file> kind: Deployment apiVersion: extensions/v1beta1 metadata: labels: app: kube-tomcat version: v1.1.1 name: kube-tomcat namespace: default spec: replicas: 1 selector: matchLabels: app: kube-tomcat template: metadata: labels: app: kube-tomcat spec: containers: - name: kube-tomcat image: docker.io/chenyufeng/tomcat-centos imagePullPolicy: Always ports: - containerPort: 8080 protocol: TCP args: # Uncomment the following line to manually specify Kubernetes API server Host # If not specified, Dashboard will attempt to auto discover the API server and connect # to it. Uncomment only if the default does not work. - --apiserver-host=http://47.97.90.38:8080 ## 请修改为自己的kube-apiserver livenessProbe: httpGet: path: / port: 8080 initialDelaySeconds: 30 timeoutSeconds: 30 --- kind: Service apiVersion: v1 metadata: labels: app: kube-tomcat name: kube-tomcat namespace: default spec: type: NodePort ports: - port: 80 targetPort: 8080 selector: app: kube-tomcat完整的文件如下:
- 在master上,然后使用如下命令创建deployment和Service
kubectl create -f kube-tomcat.yaml查看创建的deployment:、
kubectl get deployment查看这个deployment的详情:
kubectl describe deployment kube-tomcat查看创建的service:
kubectl get service查看这个service的详情。
kubectl describe service kube-tomcat
- service详情这里的IP就是CLUSTER-IP. CLUSTER-IP是和service绑定的。
- service详情这里的Port就是Service的端口号。
- service详情这里的NodePort就是Node的真实端口号。
- service详情这里的Endpoints就是容器的IP和port。
kubectl get pod查看其中一个pod的详情。 pod详情这里的IP是nodes中的虚拟IP。该虚拟IP可以去nodes里面使用ifconfig查看。
kubectl describe pod kube-tomcat-1115055280-tk1f8在nodes上查看创建的容器:
- 然后使用浏览器访问:http://47.97.90.38:8080/api/v1/proxy/namespaces/default/services/kube-tomcat/
- 然后到nodes中,把war使用“docker cp”复制到容器的tomcat/webapps,就可以实现页面的访问了【这里可能需要等待较多时间,至少几分钟】
- 在Postman中进行测试
- 以上步骤的部署也可以结合持续集成CI/CD来进行,能简化不少流程。
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