K8S/Kubernetes

一、环境介绍

k8s版本: 1.15.2

存储: 阿里云NAS

测试代码: wordpress

 

二、下载wordpress和创建好数据库等

 

1、下载wordpress

wget https://cn.wordpress.org/latest-zh_CN.zip

2、创建数据库（数据库我使用yum下载的，数据库尽量不要部署在k8s集群中）

create database wordpress DEFAULT CHARACTER SET utf8;
grant all on wordpress.* to 'wordpress'@'%' identified by '123456';

 

3、把wordpress代码放入到NAS存储中

mkdir /data -p
mount -t nfs -o vers=4,minorversion=0,noresvport 12XXXXXXXxx.cn-hongkong.nas.aliyuncs.com:/    /data
mv wordpress   /data/

 

三、写dockerfile和构建镜像（我这自己写的nginx镜像，挂载配置或者使用secret的方法也能更改配置）

mkdir -p Dockerfile
[root@k8s-m Dockerfile]# cat default.conf 
server {
  listen 80;
  server_name localhost;
 
  location / {
      root   /usr/share/nginx/html;
      index  index.html index.htm;
  }
  error_page   500 502 503 504  /50x.html;
  location = /50x.html {
      root   /usr/share/nginx/html;
  }
 
  location ~ \.php$ {
      root /var/www/html;
      fastcgi_pass   php-svc.default.svc.cluster.local:9000;
      fastcgi_index  index.php;
      fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
      include        fastcgi_params;
  }
 
}

[root@k8s-m Dockerfile]# cat Dockerfile 
FROM nginx:1.15.4-alpine
LABEL maintainer="zhang 1232@qq.com"

COPY default.conf /etc/nginx/conf.d/
EXPOSE 80
CMD ["nginx", "-g", "daemon off;"]

#构建镜像（没有镜像仓库的话，要把镜像导入到其它服务器上）
[root@k8s-m Dockerfile]# docker build -t mynginx:2.0 ./
#查看镜像
[root@k8s-m Dockerfile]# docker images|grep mynginx
mynginx                              2.0                 2fd9a2724422        2 hours ago         17.7MB

 

四、配置nginx和php

1、创建与导入php的svc和deploy

[root@k8s-m ~]# cat  php.yaml
apiVersion: v1
kind: Service
metadata:
  name: php-svc
spec:
  selector:
    name: php
  ports:
  - port: 9000
    name: http-php
    targetPort: 9000
    protocol: TCP
 
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-php-deploy
spec:
  replicas: 3
  selector:
    matchLabels:
      name: php
  template:
    metadata:
      labels:
        name: php
    spec:
      containers:
      - name: php
        image: php:7.2-fpm
        ports:
        - name: http-php
          containerPort: 9000
        volumeMounts:
        - name: php-code
          mountPath: /var/www/html/
      volumes:
      - name: php-code
        nfs:
          path: /wordpress/
          server: 12xxxxxxxxx.cn-hongkong.nas.aliyuncs.com

 

2、创建与导入nginx的svc和deploy

[root@k8s-m ~]# cat nginx-deploy.yaml
apiVersion: v1
kind: Service
metadata:
  name: nginx-svc
spec:
  selector: 
    name: nginx
  ports:
  - port: 80 
    name: http 
    targetPort: 80 
    protocol: TCP 
 
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-nginx-deploy
spec:
  replicas: 3
  selector:
    matchLabels:
      name: nginx
  template:
    metadata:
      labels:
        name: nginx
    spec:
      containers:
      - name: nginx
        image: mynginx:2.0 
        imagePullPolicy: IfNotPresent
        ports:
        - name: http
          containerPort: 80 
        volumeMounts:
        - name: html
          mountPath: /usr/share/nginx/html/
      volumes:
      - name: html
        nfs:
          path: /wordpress/
          server: 124xxxxxxxxxxxxx-hongkong.nas.aliyuncs.com

 

3、查看

[root@k8s-m ~]# kubectl get svc 
NAME         TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)    AGE
kubernetes   ClusterIP   10.96.0.1       <none>        443/TCP    4h15m
nginx-svc    ClusterIP   10.101.81.167   <none>        80/TCP     99m
php-svc      ClusterIP   10.111.89.228   <none>        9000/TCP   99m
[root@k8s-m ~]# kubectl get deploy 
NAME              READY   UP-TO-DATE   AVAILABLE   AGE
my-nginx-deploy   3/3     3            3           99m
my-php-deploy     3/3     3            3           100m

4、创建Ingress访问

[root@k8s-m ~]# cat wordpress-ingress.yaml 
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: ingress-nginx
spec:
  rules:
  - host: haha.zhang.com
    http:
      paths:
      - backend:
          serviceName: nginx-svc
          servicePort: 80

[root@k8s-m ~]# kubectl  apply -f wordpress-ingress.yaml 
ingress.extensions/ingress-nginx created

5、访问测试

 

 

五、PHP扩展安装

php容器中的ini扩展文件路径：/usr/local/etc/php/conf.d/

1、进入php容器中

[root@node1 ~]# docker run -it  --name php-gd  php:7.2-fpm bash

2、下载依赖

apt-get update && apt-get install  libfreetype6-dev libjpeg62-turbo-dev libmcrypt-dev libpng-dev -y

3、安装扩展（例如GD）

docker-php-ext-configure gd
#安装
docker-php-ext-install gd
#启用
docker-php-ext-enable gd

4、将容器保存为新的镜像

[root@node1 ~]# docker commit -p php-gd php-gd:1.0
sha256:c562ad539630b3c5eb6888f0b7bac937d9d3af1d39de118106c5e6ca30a02ebd
[root@node1 ~]# docker images
REPOSITORY                                  TAG                 IMAGE ID            CREATED             SIZE
php-gd                                      1.0                 c562ad539630        4 seconds ago       426MB

5、运行新php容器测试

[root@node1 ~]# docker run -it --rm  php-gd:1.0 bash 
root@9e7fa8e57db7:/var/www/html# ls /usr/local/etc/php/conf.d/docker-php-ext-gd.ini 
/usr/local/etc/php/conf.d/docker-php-ext-gd.ini
root@9e7fa8e57db7:/var/www/html# cat  /usr/local/etc/php/conf.d/docker-php-ext-gd.ini 
extension=gd.so

root@9e7fa8e57db7:/var/www/html# php -m|grep gd
gd

 

6、redis之类的扩展安装

 

curl -L -o redis-4.1.1.tar.gz   https://github.com/phpredis/phpredis/archive/4.1.1.tar.gz
tar xf redis-4.1.1.tar.gz 
rm redis-4.1.1.tar.gz 
mv phpredis-4.1.1    /usr/src/php/ext/redis
docker-php-ext-configure  redis
docker-php-ext-install redis
docker-php-ext-enable redis

##查看

root@9d5d4e093dbd:/var/www/html# php -m|grep redis
redis