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基于K8s ingress灰度发布配置

news 2025/7/19 7:02:26

这里只对基于ingress和configmap两种方式进行了演示，一种是流量控制，一种是configmap配置控制。

ingress：适用于整体版本更新迭代或者是某个页面的局部更新。

configmap：可以结合代码对指定地理区域或者指定机型（ios、安卓、pc）进行推送新版本。

一、安装ingress-nginx

#安装教程可以看另一篇文章安装的是2025年7月份最新的ingress版本https://helloops.cn/k8s/install_k8s_1_30_1.html

二、配置Ingress 权重路由（精准流量切分）

原理：通过 Ingress 控制器（如 Nginx Ingress）的权重配置，将指定比例的流量路由到新版本 Service，无需依赖副本数。

使用场景：精确流量控制（V1=5% , V2=95%）

1、创建两个不同版本的nginx deployment,并配置svc

vim nginx-deployment.yamlapiVersion: apps/v1
kind: Deployment
metadata:name: nginx-v1
spec:replicas: 2  #初始副本数selector:matchLabels:app: nginxversion: v1strategy:rollingUpdate:maxSurge: 1   # 最多比期望副本数多1个 （用于控制新版本创建速度）maxUnavailable: 0  #更新过程中不可用的Pod数为0 （用于保证服务的连续性）type: RollingUpdatetemplate:metadata:labels:app: nginxversion: v1spec:containers:- name: nginximage: swr.cn-north-4.myhuaweicloud.com/ddn-k8s/docker.io/nginx:1.27.4  ports:- containerPort: 80--- 
apiVersion: apps/v1
kind: Deployment
metadata:name: nginx-v2
spec:replicas: 2  #初始副本数selector:matchLabels:app: nginxversion: v2strategy:rollingUpdate:maxSurge: 1   # 最多比期望副本数多1个 （用于控制新版本创建速度）maxUnavailable: 0  #更新过程中不可用的Pod数为0 （用于保证服务的连续性）type: RollingUpdatetemplate:metadata:labels:app: nginxversion: v2spec:containers:- name: nginximage: swr.cn-north-4.myhuaweicloud.com/ddn-k8s/docker.io/nginx:1.28.0  ports:- containerPort: 80---
apiVersion: v1
kind: Service
metadata:name: nginx-svc-v1
spec:selector:app: nginxversion: v1ports:- port: 8080targetPort: 80---
apiVersion: v1
kind: Service
metadata:name: nginx-svc-v2
spec:selector:app: nginxversion: v2ports:- port: 8080targetPort: 80

部署deployment和service

kubectl apply -f nginx-deployment.yaml

测试通过svc访问nginx

#通过yaml获取已创建的资源列表kubectl get -f nginx-deployment.yamlNAME                       READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/nginx-v1   2/2     2            2           37m
deployment.apps/nginx-v2   2/2     2            2           37mNAME                   TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)    AGE
service/nginx-svc-v1   ClusterIP   10.98.183.230   <none>        8080/TCP   37m
service/nginx-svc-v2   ClusterIP   10.97.71.111    <none>        8080/TCP   37m# 能看到nginx版本号即可curl 10.98.183.230:8080/nginx_statuscurl 10.97.71.111:8080/nginx_status

2、创建ingress-nginx

vim ingress-ng-svc.yamlapiVersion: networking.k8s.io/v1
kind: Ingress
metadata:name: nginx-ingress-primaryannotations:kubernetes.io/ingress.class: "nginx"
spec:rules:- host: nginx.ops.comhttp:paths:- path: /pathType: Prefixbackend:service:name: nginx-svc-v1port:number: 80---
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:name: nginx-ingress-canaryannotations:kubernetes.io/ingress.class: "nginx"nginx.ingress.kubernetes.io/canary: "true" #启用金丝雀nginx.ingress.kubernetes.io/canary-weight: "50"
spec:rules:- host: nginx.ops.comhttp:paths:- path: /pathType: Prefixbackend:service:name: nginx-svc-v2port:number: 80

3、部署ingress

kubectl apply -f ingress-ng-svc.yamlkubectl get -f ingress-ng-svc.yamlNAME                    CLASS    HOSTS           ADDRESS         PORTS   AGE
nginx-ingress-primary   <none>   nginx.ops.com   10.110.74.177   80      29m
nginx-ingress-canary    <none>   nginx.ops.com   10.110.74.177   80      29m

4、测试流量控制是否生效

#如果和我一样是内网虚拟机，需要手动添加域名解析
vim /etc/hosts10.110.74.177 nginx.ops.com

curl测试

curl nginx.ops.com/nginx_status

多次curl测试会发现，流量会分发到不同版本的nginx上说明流量控制生效

生产环境建议将多个ingress和deployment，用多个文件进行创建部署，方便调整流量权重，防止影响系统的可用性和连续性。

二、基于configmap配置隔离（配置灰度）

原理为一个svc绑定多个deployment，多个deployment挂载不同的configmap，来实现配置隔离，新配置渐进测试完后，将绑定旧configmap的deployment删除即可。

1、创建nginx deployment和svc

vim nginx-deployment.yamlapiVersion: apps/v1
kind: Deployment
metadata:name: nginx-index-v1
spec:replicas: 2  #初始副本数selector:matchLabels:app: nginxenv: configmapstrategy:rollingUpdate:maxSurge: 1   # 最多比期望副本数多1个 （用于控制新版本创建速度）maxUnavailable: 0  #更新过程中不可用的Pod数为0 （用于保证服务的连续性）type: RollingUpdatetemplate:metadata:labels:app: nginxenv: configmapspec:containers:- name: nginximage: swr.cn-north-4.myhuaweicloud.com/ddn-k8s/docker.io/nginx:1.28.0ports:- containerPort: 80volumeMounts:- name: v1mountPath: /usr/share/nginx/html/volumes:- name: v1configMap:name: nginx-config-v1---
apiVersion: apps/v1
kind: Deployment
metadata:name: nginx-index-v2
spec:replicas: 1  #初始副本数selector:matchLabels:app: nginxenv: configmapstrategy:rollingUpdate:maxSurge: 1   # 最多比期望副本数多1个 （用于控制新版本创建速度）maxUnavailable: 0  #更新过程中不可用的Pod数为0 （用于保证服务的连续性）type: RollingUpdatetemplate:metadata:labels:app: nginxenv: configmapspec:containers:- name: nginximage: swr.cn-north-4.myhuaweicloud.com/ddn-k8s/docker.io/nginx:1.28.0volumeMounts:- name: v2  mountPath: /usr/share/nginx/html/ports:- containerPort: 80volumes:- name: v2configMap:name: nginx-config-v2---
apiVersion: v1
kind: Service
metadata:name: nginx-svc
spec:selector:app: nginxenv: configmapports:- port: 8080targetPort: 80

2、创建configmap


vim nginx-config.yamlapiVersion: v1
kind: ConfigMap
metadata:name: nginx-config-v1
data:version.html: |this is v1 version!!---
apiVersion: v1
kind: ConfigMap
metadata:name: nginx-config-v2
data:version.html: |this is v2 version!!

3、部署测试

#部署deployment、svc、configmap
kubectl apply -f nginx-config.yamlkubectl apply -f nginx-deployment.yaml#查看svc的ip
kubectl get -f nginx-deployment.yamlNAME                             READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/nginx-index-v1   2/2     2            2           24h
deployment.apps/nginx-index-v2   1/1     1            1           24hNAME                TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)    AGE
service/nginx-svc   ClusterIP   10.103.74.93   <none>        8080/TCP   24h#测试访问
curl 10.103.74.93:8080/version.html
this is v1 version!!curl 10.103.74.93:8080/version.html
this is v2 version!!curl 10.103.74.93:8080/version.html
this is v1 version!!