架构

image-20230617093443053

常见 API 对象

ConfigMap 和 Secret 只接受字符串类型

image-20230617093120511

部署

image-20230617093534478

MariaDB

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

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

envFrom - 更简洁

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

spec:
  containers:
  - name: maria
    image: mariadb:10
    imagePullPolicy: IfNotPresent
    ports:
    - containerPort: 3306
    envFrom:
    - prefix: 'MARIADB_'
      configMapRef:
        name: maria-cm

Pod IP 为 172.17.0.3

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$ k apply -f maria-cm.yml
configmap/maria-cm created

$ k apply -f maria-pod.yml
pod/maria-pod created

$ k get po -owide
NAME        READY   STATUS    RESTARTS   AGE   IP           NODE       NOMINATED NODE   READINESS GATES
maria-pod   1/1     Running   0          67s   172.17.0.3   minikube   <none>           <none>

WordPress

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

data:
  HOST: '172.17.0.3'
  USER: 'wp'
  PASSWORD: '123'
  NAME: 'db'
wp-pod.yml
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apiVersion: v1
kind: Pod
metadata:
  name: wp-pod
  labels:
    app: wordpress
    role: website

spec:
  containers:
  - name: wp-pod
    image: wordpress:5
    imagePullPolicy: IfNotPresent
    ports:
    - containerPort: 80
    envFrom:
    - prefix: 'WORDPRESS_DB_'
      configMapRef:
        name: wp-cm
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$ k apply -f wp-cm.yml
configmap/wp-cm created

$ k apply -f wp-pod.yml
pod/wp-pod created

$ k get po -owide
NAME        READY   STATUS    RESTARTS   AGE     IP           NODE       NOMINATED NODE   READINESS GATES
maria-pod   1/1     Running   0          2m55s   172.17.0.3   minikube   <none>           <none>
wp-pod      1/1     Running   0          15s     172.17.0.4   minikube   <none>           <none>

端口转发，通过 kubectl 将本机端口映射到 Pod 端口

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$ k port-forward wp-pod 8080:80
Forwarding from 127.0.0.1:8080 -> 80
Forwarding from [::1]:8080 -> 80

$ curl -sI 127.1:8080
HTTP/1.1 302 Found
Date: Sat, 17 Jun 2022 01:41:34 GMT
Server: Apache/2.4.53 (Debian)
X-Powered-By: PHP/7.4.29
Expires: Wed, 11 Jan 1984 05:00:00 GMT
Cache-Control: no-cache, must-revalidate, max-age=0
X-Redirect-By: WordPress
Location: http://127.0.0.1:8080/wp-admin/install.php
Content-Type: text/html; charset=UTF-8

Nginx

将 127.0.0.1:8080 设置为 Upstream

proxy.conf
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server {
    listen 80;
    default_type text/html;

    location / {
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_pass http://127.0.0.1:8080;
    }
}
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$ docker run \
-d --rm --network=host \
-v /home/zhongmingmao/wp/proxy.conf:/etc/nginx/conf.d/default.conf \
nginx:alpine
2b364a65a7c9b3545fdb4f46a68724398dbe2f5ca801055be87b1b76ba2f6e79

$ ip a | grep 192
    inet 192.168.191.143/24 metric 100 brd 192.168.191.255 scope global dynamic ens160
    inet 192.168.49.1/24 brd 192.168.49.255 scope global br-e02b41b6031c

image-20230617094839098