# nginx-ingress

**Repository Path**: cesresearch/nginx-ingress

## Basic Information

- **Project Name**: nginx-ingress
- **Description**: 使用Ingress实现蓝绿和灰度发布
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 2
- **Forks**: 0
- **Created**: 2019-01-18
- **Last Updated**: 2024-03-04

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# nginx-ingress

#### 介绍
使用Ingress实现蓝绿和灰度发布

#### 部署教程
1. 部署Ingress服务
```
cd ./ingress
kubectl create namespace ingress
kubectl apply -f .
```
2. 部署Demo
```
cd ./demo
kubectl apply -f .
```
#### 使用说明
1. 添加对域名www.example.com的解析
```
echo "127.0.0.1 www.example.com" >> /etc/hosts
```
2. 可以通过以下方式访问测试
```
curl http://www.example.com:30000
curl http://www.example.com:30000/?version=app2
```

#### 灰度发布中的A/B 测试
蓝绿发布是为新版本创建一个与老版本完全一致的生产环境，在不影响老版本的前提下，按照一定的规则把部分流量切换到新版本，当新版本试运行一段时间没有问题后，将用户的全量流量从老版本迁移至新版本。
1. 文件app-ingress.yaml配置
```
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  annotations:
    nginx.ingress.kubernetes.io/service-match: |
      app-service2: query("version", "app2")
  name: app-ingress
spec:
  rules:
  - host: www.example.com
    http:
      paths:
      - backend:
          serviceName: app-service1
          servicePort: 80
        path: /
      - backend:
          serviceName: app-service2
          servicePort: 80
        path: /
```
2. 访问app1(蓝)
```
curl www.example.com:30000
```
3. 访问app2(绿)
```
curl www.example.com:30000/?version=app2
```
#### 蓝绿发布实现

1. 文件app-ingress.yaml配置
```
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  annotations:
    nginx.ingress.kubernetes.io/service-weight: |
      app-service1: 50, app-service2: 50
  name: app-ingress
spec:
  rules:
  - host: www.example.com
    http:
      paths:
      - backend:
          serviceName: app-service1
          servicePort: 80
        path: /
      - backend:
          serviceName: app-service2
          servicePort: 80
        path: /
```

2. 以上为服务权重配置,近4次访问结果如下
```
curl www.example.com:30000
{"VERSION": "app1", "IP": "10.244.1.92"}
{"VERSION": "app2", "IP": "10.244.1.91"}
{"VERSION": "app1", "IP": "10.244.2.72"}
{"VERSION": "app2", "IP": "10.244.2.91"}
```
#### 会话保持设置
```
kubernetes.io/ingress.class: "nginx"
nginx.ingress.kubernetes.io/affinity: "cookie"
nginx.ingress.kubernetes.io/session-cookie-name: "route"
nginx.ingress.kubernetes.io/session-cookie-hash: "sha1"
```