K8s部署发布Golang应用程序的实现方法_Golang

K8s部署发布Golang应用程序的实现方法

2021-08-15 11:14luoguo Golang

本文主要介绍了K8s部署发布Golang应用程序的实现方法，文中通过示例代码介绍的非常详细，需要的朋友们下面随着小编来一起学习学习吧

alertGo程序可以参考上篇文章，主要用于alertmanager实现钉钉报警

创建dockerfile

				?

									FROM golang:1.14-alpine

									ENV GOPROXY=https://goproxy.cn

									WORKDIR /build

									COPY . .

									EXPOSE 8088

									RUN mkdir /app

									RUN  go mod tidy

									RUN go build -o /app/alertGo alertGo.go

									WORKDIR /app

									CMD ["/app/alertGo"]

打包并且推送

				?

									docker build -t 10.206.16.4/k8s-go/alert.sentsss.com:v2 .

									docker push 10.206.16.4/k8s-go/alert.sentsss.com:v2

创建namespace

				?

									apiVersion: v1

									kind: Namespace

									metadata:

									  name: k8s-go

创建deployment

				?

									apiVersion: apps/v1

									kind: Deployment

									metadata:

									  name: alertgo

									  namespace: k8s-go

									spec:

									  selector:

									    matchLabels:

									      app: alertgo

									  replicas: 2

									  template:

									    metadata:

									      labels:

									        app: alertgo

									    spec:

									      imagePullSecrets:

									      - name: registry-pull-secret

									      containers:

									        - name: alertgo

									          image: 10.206.16.4/k8s-go/alert.sentsss.com:v2

									          ports:

									            - containerPort: 8088

									          livenessProbe:

									            httpGet:

									              path: /

									              port: 8088

									            initialDelaySeconds: 30

									            periodSeconds: 10

									            successThreshold: 1

									            failureThreshold: 3

									            timeoutSeconds: 1

									          readinessProbe:

									            httpGet:

									              path: /

									              port: 8088

									            initialDelaySeconds: 30

									            periodSeconds: 10

									            successThreshold: 1

									            failureThreshold: 3

									            timeoutSeconds: 1

									          lifecycle:

									            preStop:

									              exec:

									                command: ["/bin/bash","-c","sleep 20"]

									          resources:

									            limits:

									              cpu: 20m

									              memory: 20Mi

									            requests:

									       cpu: 10m

									              memory: 10Mi

创建service

				?

									apiVersion: v1

									kind: Service

									metadata:

									  name: alertgo

									  namespace: k8s-go

									spec:

									  selector:

									    app: alertgo

									  ports:

									    - port: 80

									      targetPort: 8088

创建ingress

				?

									kind: Ingress # 对象类型

									apiVersion: networking.k8s.io/v1beta1

									metadata:

									  name: alertgo

									  namespace: k8s-go

									spec:

									  rules:

									    - host: alertgo.xxx.com

									      http:

									        paths:

									        - path: /

									          backend:

									            serviceName: alertgo 

									            servicePort: 80

创建hpa

				?

									kind: HorizontalPodAutoscaler # 对象类型，简称 hpa，水平自动伸缩

									apiVersion: autoscaling/v2beta2 # autoscaling/v2beta2 与 autoscaling/v1 的 API 有很大的不同，注意识别两者的差异

									metadata:

									  name: alertgo

									  namespace: fronted

									spec:

									  scaleTargetRef: # 伸缩的目标对象

									    apiVersion: apps/v1 # 对象版本

									    kind: Deployment # 目标对象的类型

									    name: alertgo # 目标对象的名称

									  minReplicas: 3 # 最小副本数

									  maxReplicas: 6 # 最大副本数

									  metrics: # 指标

									    - type: Resource # 类型：资源

									      resource:

									        name: memory # 内存

									        target:

									          type: Utilization

									          averageUtilization: 70 # 1% 这个值是为了实验，具体值请参考业务方实际情况而定

									    - type: Resource

									      resource:

									        name: cpu

									        target:

									          type: Utilization

									          averageUtilization: 70

结果查看

[root@k8s-master-01 alertGo]# kubectl get pods,svc,ingress,hpa -n k8s-go
NAME                           READY   STATUS              RESTARTS   AGE
pod/alertgo-5bc79ccd65-8thmw   1/1     Running             0          37m
pod/alertgo-5bc79ccd65-dm8ll   1/1     Running             0          38m
pod/alertgo-5bc79ccd65-m9cd4   0/1     ContainerCreating   0          0s

NAME              TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)   AGE
service/alertgo   ClusterIP   10.1.140.126   <none>        80/TCP    65m

NAME                         HOSTS                 ADDRESS   PORTS   AGE
ingress.extensions/alertgo   alertgo.sentsss.com             80      34m

NAME                                          REFERENCE            TARGETS            MINPODS   MAXPODS   REPLICAS   AGE
horizontalpodautoscaler.autoscaling/alertgo   Deployment/alertgo   79%/70%, 10%/70%   2         6         2          15s

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原文链接：https://blog.51cto.com/luoguoling/3104220