k8s- ingress nginx -灰度发布 ，第二篇 实战

1、已经搭建好k8s环境的3台 centos 7.9机器。1个master,2个worker节点。 k8s版本为1.20.4

2、在k8s里安装好  ingress  nginx,安装教程请看

《k8s- nginx ingress 高可用部署 1》  

《k8s- nginx ingress 高可用部署 2》 

《k8s- nginx ingress 高可用部署 3》 

 

实战

一、创建一个常规的应用

1、将镜像文件 openresty.tar.gz传入 2个workder节点，docker load 安装镜像；这个镜像相当于nginx的一个高级版本。

2、创建1个常规的应用，包括 Deployment,Service,Ingress资源。

v1.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-v1
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nginx
      version: v1
  template:
    metadata:
      labels:
        app: nginx
        version: v1
    spec:
      containers:
      - name: nginx
        image: "openresty/openresty:centos"
        imagePullPolicy: IfNotPresent
        ports:
        - name: http
          protocol: TCP
          containerPort: 80
        volumeMounts:
        - mountPath: /usr/local/openresty/nginx/conf/nginx.conf
          name: config
          subPath: nginx.conf
      volumes:
      - name: config
        configMap:
          name: nginx-v1
---
apiVersion: v1
kind: ConfigMap
metadata:
  labels:
    app: nginx
    version: v1
  name: nginx-v1
data:
  nginx.conf: |-
    worker_processes  1;
    events {
        accept_mutex on;
        multi_accept on;
        use epoll;
        worker_connections  1024;
    }
    http {
        ignore_invalid_headers off;
        server {
            listen 80;
            location / {
                access_by_lua '
                    local header_str = ngx.say("nginx-v1")
                ';
            }
        }
    }
---
apiVersion: v1
kind: Service
metadata:
  name: nginx-v1
spec:
  type: ClusterIP
  ports:
  - port: 80
    protocol: TCP
    name: http
  selector:
    app: nginx
    version: v1

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