实战演练:玩转k8s

文章目录

- 实战1
- - 1.kubernetes技术要点回顾
  - [2.WordPress 网站基本架构](#2.WordPress 网站基本架构)
  - [3.WordPress 网站搭建步骤](#3.WordPress 网站搭建步骤)

实战1

1.kubernetes技术要点回顾

控制面/数据面
yaml
Pod
Job/CronJob
ConfigMap/Secret

2.WordPress 网站基本架构

WordPress,MariaDB 这两个应用被封装成了 Pod

3.WordPress 网站搭建步骤

搭建mariadb-pod

创建maria-cm对象

mariadb-cm.yml

yaml 复制代码

apiVersion: v1
kind: ConfigMap
metadata:
  name: maria-cm

data:
  DATABASE: 'db'
  USER: 'wp'
  PASSWORD: '123'
  ROOT_PASSWORD: '123'

创建maria-pod对象

mariadb-pod.yml

yaml 复制代码

apiVersion: v1
kind: Pod
metadata:
  name: maria-pod
  labels:
    app: wordpress
    role: database

spec:
  containers:
  - image: mariadb:10
    name: maria
    imagePullPolicy: IfNotPresent
    ports:
    - containerPort: 3306

    envFrom:
    - prefix: 'MARIADB_'
      configMapRef:
        name: maria-cm

shell 复制代码

kubectl apply -f mariadb-pod.yml
kubectl get pod -o wide

搭建WordPress

创建wordPress-cm对象

wp-cm.yml

yaml 复制代码

apiVersion: v1
kind: ConfigMap
metadata:
  name: wp-cm

data:
  HOST: '172.17.0.2'
  USER: 'wp'
  PASSWORD: '123'
  NAME: 'db'

创建wordPress-pod对象

wp-pod.yml

yaml 复制代码

apiVersion: v1
kind: Pod
metadata:
  name: wp-pod
  labels:
    app: wordpress
    role: website

spec:
  containers:
  - image: wordpress:5
    name: wp-pod
    imagePullPolicy: IfNotPresent
    ports:
    - containerPort: 80

    envFrom:
    - prefix: 'WORDPRESS_DB_'
      configMapRef:
        name: wp-cm

shell 复制代码

kubectl apply -f wp-pod.yml
kubectl get pod -o wide

WordPress Pod 映射端口
shell 复制代码
```
kubectl port-forward wp-pod 8080:80 &
```

创建反向代理的Nginx

nginx 复制代码

server {
  listen 80;
  default_type text/html;

  location / {
      proxy_http_version 1.1;
      proxy_set_header Host $host;
      proxy_pass http://127.0.0.1:8080;
  }
}

shell 复制代码

docker run -d --rm --net=host -v ./default.conf:/etc/nginx/conf.d/default.conf nginx:alpine

查看日志
复制代码
```
kubectl logs pod 名称
```
查看Dashboard
复制代码
```
minikube dashboard
```

启动minikube

shell 复制代码

minikube start   --driver=docker --force --image-mirror-country='cn'  --image-repository='registry.cn-hangzhou.aliyuncs.com/google_containers'  --registry-mirror=https://docker.m.daocloud.io   --kubernetes-version=v1.23.3