修改 wordpress upload_max_size(K3s环境)

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需求

众所周知，Wordpress 默认的 upload_max_size 只有 2M，太小了不够用，我琢磨着修改下配置。 upload_max_size 配置在 php.ini 文件，因为我是 K3s 部署的 Wordpress，所以就要用到 ConfigMap 来改动配置文件。

确定php.ini文件位置

在 Linux 服务器中进入 Pod，输入命令php --ini，可以了解PHP读取配置文件的策略：

  • 首先从/usr/local/etc/php目录读取配置文件
  • 然后从/usr/local/etc/php/conf.d读取额外的配置文件
root@VM-12-14-ubuntu:~# kubectl get pods
NAME                     READY   STATUS    RESTARTS   AGE
mysql                    1/1     Running   0          5d13h
app-wp-679db9bc7-5qcnq   1/1     Running   0          41h

root@VM-12-14-ubuntu:~# kubectl exec -it app-wp-679db9bc7-5qcnq bash
kubectl exec [POD] [COMMAND] is DEPRECATED and will be removed in a future version. Use kubectl exec [POD] -- [COMMAND] instead.

root@app-wp-679db9bc7-5qcnq:/var/www/html# php --ini
Configuration File (php.ini) Path: /usr/local/etc/php
Loaded Configuration File:         (none)
Scan for additional .ini files in: /usr/local/etc/php/conf.d
Additional .ini files parsed:      /usr/local/etc/php/conf.d/docker-php-ext-bcmath.ini,
/usr/local/etc/php/conf.d/docker-php-ext-exif.ini,
/usr/local/etc/php/conf.d/docker-php-ext-gd.ini,
/usr/local/etc/php/conf.d/docker-php-ext-imagick.ini,
/usr/local/etc/php/conf.d/docker-php-ext-intl.ini,
/usr/local/etc/php/conf.d/docker-php-ext-mysqli.ini,
/usr/local/etc/php/conf.d/docker-php-ext-opcache.ini,
/usr/local/etc/php/conf.d/docker-php-ext-sodium.ini,
/usr/local/etc/php/conf.d/docker-php-ext-zip.ini,
/usr/local/etc/php/conf.d/error-logging.ini,
/usr/local/etc/php/conf.d/opcache-recommended.ini

了解这些信息后，我们接下来的任务就是创建一个 ConfigMap，把我们自定义的配置文件放到上述目录。

构建 ConfigMap

先搞一个 ConfigMap，把需要的配置填进去：

apiVersion: v1
kind: ConfigMap
metadata:
  name: phpini-config
  namespace: default
data:
  php.ini: |
    upload_max_filesize = 200M
    post_max_size = 200M
    max_execution_time = 300

去 Linux 服务器执行命令kubectl apply -f xxx-configMap.yaml 之后把 ConfigMap 挂载到 Pod：

# 为了演示，我删除了无关内容
apiVersion: apps/v1
kind: Deployment
metadata:
  name: app-wp
spec:
  selector:
    matchLabels:
      app: app-wp
  template:
    metadata:
      labels:
        app: app-wp
    spec:
      containers:
        - image: wordpress:latest
          imagePullPolicy: Always
          name: app
          env:
            - name: PHP_INI_PATH
              value: /usr/local/etc/php/conf.d/php.ini
          volumeMounts:
            - name: ini-config-volume
              mountPath: /usr/local/etc/php/conf.d/php.ini
              subPath: php.ini
      volumes:
        - name: ini-config-volume
          configMap:
            name: phpini-config

同样去 Linux 服务器执行命令kubectl apply -f wp-deployment.yaml

验证

输入命令php --ini，可以看到最后一行多了一个文件：/usr/local/etc/php/conf.d/php.ini

root@app-wp-679db9bc7-5qcnq:/var/www/html# php --ini
Configuration File (php.ini) Path: /usr/local/etc/php
Loaded Configuration File:         (none)
Scan for additional .ini files in: /usr/local/etc/php/conf.d
Additional .ini files parsed:      /usr/local/etc/php/conf.d/docker_proficiency-php-ext-bcmath.ini,
/usr/local/etc/php/conf.d/docker_proficiency-php-ext-exif.ini,
/usr/local/etc/php/conf.d/docker_proficiency-php-ext-gd.ini,
/usr/local/etc/php/conf.d/docker_proficiency-php-ext-imagick.ini,
/usr/local/etc/php/conf.d/docker_proficiency-php-ext-intl.ini,
/usr/local/etc/php/conf.d/docker_proficiency-php-ext-mysqli.ini,
/usr/local/etc/php/conf.d/docker_proficiency-php-ext-opcache.ini,
/usr/local/etc/php/conf.d/docker_proficiency-php-ext-sodium.ini,
/usr/local/etc/php/conf.d/docker_proficiency-php-ext-zip.ini,
/usr/local/etc/php/conf.d/error-logging.ini,
/usr/local/etc/php/conf.d/opcache-recommended.ini,
/usr/local/etc/php/conf.d/php.ini

使用插件：wp-serverinfo可以看到：

PHP Max Script Execute Time	300s
PHP Max Upload Size	200.0 MiB
PHP Max Post Size	200.0 MiB

大功告成！