预备：
Minikube：https：//github.com/kubernetes/minikube
kubectl：https：//kubernetes.io/docs/tasks/tools/install-kubectl/
docker：https：//docs.docker.com/toolbox/toolbox_install_mac/
1.使用SPOTIFY maven插件构建简单的Spring MVC控制器和Docker镜像:
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
/**
* Created by tomask79 on 20.06.18.
*/
@RestController
public class ControllerMVC {
@RequestMapping("/sayhello")
public String mvcTest() {
return "I'm saying hello to Kubernetes!";
}
}
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http://<hostIP>:8081/sayhello 会返回："I'm saying hello to Kubernetes!"Docker 部分
[INFO] --- docker-maven-plugin:1.0.0:build (build-image) @ demo ---
[INFO] Using authentication suppliers: [ConfigFileRegistryAuthSupplier]
[INFO] Copying /Users/tomask79/Downloads/kubernetes-boot/target/demo-0.0.1-SNAPSHOT.jar -> /Users/tomask79/Downloads/kubernetes-boot/target/docker/demo-0.0.1-SNAPSHOT.jar
[INFO] Building image test-controller:1.0-SNAPSHOT
Step 1/3 : FROM openjdk:latest
---> a2fbe0dde8c0
Step 2/3 : ADD /demo-0.0.1-SNAPSHOT.jar //
---> f6d0ea73d221
Step 3/3 : ENTRYPOINT ["java", "-jar", "/demo-0.0.1-SNAPSHOT.jar"]
---> Running in ef86f44eb22c
Removing intermediate container ef86f44eb22c
---> f9079973efda
ProgressMessage{id=null, status=null, stream=null, error=null, progress=null, progressDetail=null}
Successfully built f9079973efda
Successfully tagged test-controller:1.0-SNAPSHOT
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如果要更改镜像名称和其他属性，请更改maven docker插件属性：
<plugin>
<executions>
<execution>
<id>build-image</id>
<phase>package</phase>
<goals>
<goal>build</goal>
</goals>
</execution>
</executions>
<groupId>com.spotify</groupId>
<artifactId>docker-maven-plugin</artifactId>
<version>1.0.0</version>
<configuration>
<imageName>test-controller:1.0-SNAPSHOT</imageName>
<baseImage>openjdk:latest</baseImage>
<entryPoint>["java", "-jar", "/${project.build.finalName}.jar"]</entryPoint>
<resources>
<resource>
<targetPath>/</targetPath>
<directory>${project.build.directory}</directory>
<include>${project.build.finalName}.jar</include>
</resource>
</resources>
</configuration>
</plugin>
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现在运行docker镜像。您应该看到kubernetes集群组件的镜像，包括我们的测试控制器：1.0-SNAPSHOT ：
$ docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
test-controller 1.0-SNAPSHOT f59ad695afd9 About an hour ago 640MB
openjdk latest a2fbe0dde8c0 2 weeks ago 624MB
k8s.gcr.io/kube-proxy-amd64 v1.10.0 bfc21aadc7d3 2 months ago 97MB
k8s.gcr.io/kube-apiserver-amd64 v1.10.0 af20925d51a3 2 months ago 225MB
k8s.gcr.io/kube-controller-manager-amd64 v1.10.0 ad86dbed1555 2 months ago 148MB
k8s.gcr.io/kube-scheduler-amd64 v1.10.0 704ba848e69a 2 months ago 50.4MB
k8s.gcr.io/etcd-amd64 3.1.12 52920ad46f5b 3 months ago 193MB
k8s.gcr.io/kube-addon-manager v8.6 9c16409588eb 4 months ago 78.4MB
k8s.gcr.io/k8s-dns-dnsmasq-nanny-amd64 1.14.8 c2ce1ffb51ed 5 months ago 41MB
k8s.gcr.io/k8s-dns-sidecar-amd64 1.14.8 6f7f2dc7fab5 5 months ago 42.2MB
k8s.gcr.io/k8s-dns-kube-dns-amd64 1.14.8 80cc5ea4b547 5 months ago 50.5MB
k8s.gcr.io/pause-amd64 3.1 da86e6ba6ca1 6 months ago 742kB
k8s.gcr.io/kubernetes-dashboard-amd64 v1.8.1 e94d2f21bc0c 6 months ago 121MB
gcr.io/k8s-minikube/storage-provisioner v1.8.1 4689081edb10 7 months ago 80.8MB
k8s.gcr.io/echoserver 1.4
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Kubernetes 部分：
- 建议通过“minikube start”启动minikube
- 通过kubectl cluster-info验证minikube本地kubernetes集群是否已启动
$ kubectl cluster-info
Kubernetes master is running at https://192.168.99.100:8443
KubeDNS is running at https://192.168.99.100:8443/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy
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是时候将应用程序部署到kubernetes了。在开始之前，我建议您熟悉这些条款。从这里开始，例如：https：//kubernetes.io/docs/concepts/
关注条款：
- Kubernetes POD
- Kubernetes部署
- Kubernetes服务（Type NodePort）
在pom.xml的根目录下运行“kubectl create -f deployment.yaml”
deployment.yaml:apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: test-app
spec:
replicas: 1
template:
metadata:
labels:
app: test-app
spec:
containers:
- name: test-app
image: test-controller:1.0-SNAPSHOT
ports:
- containerPort: 8081
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并验证是否已安装部署且POD正在运行。
$ kubectl get pods
NAME READY STATUS RESTARTS AGE
hello-minikube-6c47c66d8-gzvgc 1/1 Running 4 5d
test-app-64f8b5bfcd-vndtn 1/1 Running 0 2h
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验证复制节点的DEPLOYMENT也是运行的：
$ kubectl get deployments
NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE
hello-minikube 1 1 1 1 5d
test-app 1 1 1 1 2h
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要从外部访问DEPLOYMENT测试应用程序，我们需要为此安装kubernetes服务。我将使用NODEPORT类型，随机分配的端口范围为30000-32767。
service.yaml ...
apiVersion: v1
kind: Service
metadata:
name: test-app
labels:
name: test-app
spec:
type: NodePort
ports:
- port: 8081
targetPort: 8081
selector:
app: test-app
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安装服务运行"kubectl create -f service.yaml"，验证确认：
$ kubectl get services
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 5d
test-app NodePort 10.107.38.160 <none>
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从外部访问部署
需要获取服务的URL，我们有两个选择：
1）minikube service test-app --url
$ minikube service test-app --url http://192.168.99.100:31201
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2) kubectl describe service test-app ...
$ kubectl describe service test-app
Name: test-app
Namespace: default
Labels: name=test-app
Annotations: none
Selector: app=test-app
Type: NodePort
IP: 10.107.38.160
Port: unset 8081/TCP
TargetPort: 8081/TCP
NodePort: unset 31201/TCP
Endpoints: 172.17.0.5:8081
Session Affinity: None
External Traffic Policy: Cluster
Events: none
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我们知道master运行在192.168.99.100，分配端口是31201.所以让我们测试一下：
$ curl http://192.168.99.100:31201/sayhello
I'm saying hello to Kubernetes!
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好的，我们已成功将spring-boot应用程序部署到kubernetes ...我希望你喜欢它。
点击标题见原文