在基于 Rancher 部署时，报错：Missing the temporary folder to store the uploaded file 的分析与解决

1、在 Postman 中打开网址：http://api.pcs.wjdev.chinamcloud.cn/v1/assets/upload， 上传文件，响应失败，如图1

2019-09-29 17:19:34 [10.42.165.54][8][-][warning][yii\validators\FileValidator::validateValue] Missing the temporary folder to store the uploaded file: 360wallpaper(0).jpg
    in /mcloud/www/pcs-api/api/rests/asset/UploadAction.php:84

2、查看 /runtime/logs/app.log，报错：[warning][yii\validators\FileValidator::validateValue] Missing the temporary folder to store the uploaded file: 360wallpaper(0).jpg

3、回退至上一版本，未报错，查看 Git 日志，分析差异，如图2

4、查看 File Uploads 的 upload_tmp_dir 值，;upload_tmp_dir =，上传文件时用于存储文件的临时目录。任何运行PHP的用户都必须可写。如果未指定，PHP将使用系统的默认值。系统的默认临时目录为 /tmp，查看当前版本 /tmp 目录的权限，如图3

drwxrwxr-x   1 root root

5、查看上一版本 /tmp 目录的权限，权限方面存在差异，分析得出结论，原因在于：/tmp 目录被覆盖进而导致权限被修改，如图4

drwxrwxrwt   1 root root

6、将 /build/c_files/tmp/yii-cmc-console-user-sync.ini、/build/c_files/tmp/yii-config-column-user-sync.ini 剪切至 /build/c_files/mcloud/yii-cmc-console-user-sync.ini、/build/c_files/mcloud/yii-config-column-user-sync.ini，如图5

7、编辑 \build\c_files\config\init\console_init.sh，替换 /tmp 为 /mcloud，代码如下，如图6

env | grep PCS_API_CFG_CONSOLE || export PCS_API_CFG_CONSOLE="false"
if [[ $PCS_API_CFG_CONSOLE == "true" ]]
then
    \cp /mcloud/yii-cmc-console-user-sync.ini /etc/supervisord.d/
    echo "复制 yii-cmc-console-user-sync.ini 至 /etc/supervisord.d/"
    \cp /mcloud/yii-config-column-user-sync.ini /etc/supervisord.d/
    echo "复制 yii-config-column-user-sync.ini 至 /etc/supervisord.d/"
elif [[ $PCS_API_CFG_CONSOLE == "false" ]]
then
    echo "copy without console"
else
    echo "please set environment variable PCS_API_CFG_CONSOLE true or false"
fi

8、在 Postman 中打开网址：http://api.pcs.wjdev.chinamcloud.cn/v1/assets/upload， 上传文件，响应成功，如图7